59
D l-t J'V p.6-2 /2 6-3 E,:a+#;.4 Zrr=f E,,tl- J1 cl t vL: - #'-PAoto's ' Vr=-jt$, : lL- : = Yi, : - J-@E"ih- r, 0*i) --a ,1+ju>L Zq (p+)'ul) . Ws T/n-r<. -:G.ry ing /-i"lJ, ancJ Mo.xwe/l's Equa,'/ions t: -I#'o'r J --{*(vxi)'a; 5 : -,f # dz /j =d- 3 cc,s (unro"t - iny), /o-€ ( rl. f a.u'l : [o't- us re c<r3 <os (sricz+-lrgtt:(4o./dy) a<tf - .T ? : - vr Lrt" ( 5rr /a't -o. /n) _s in grro?t lxni'(wt). ar : ftJF ./F :a. sft:or(;rto"t-o.trr)-cotrnrdf, u). - 1/ t^ .^r- -r. i : fi: 0./glcos(srto?t-o./r)-c-os g2,rc71 -- 0.6L3 si n( rntolt -a.orT) CA) = 73 = in f 9-rr tort - 1" ) (nA). Lts ig photor with a s/ne r"f,"ten<e, fioz,A f "'!, Zr Jd -7- 4#1"(t +yS.

Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

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Page 1: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

D l - tJ ' V

p .6 -2

/2 6 -3

E,:a+#;.4 Zrr=f E,,t l-J1

cl tvL: - #'-PAoto's ' Vr=-jt$,

:

lL- : = Yi, : - J-@E"ih- r, 0*i)--a ,1+ju>L Zq (p+)'ul) .

WsT/n-r<. -:G.ry ing /-i"lJ,

ancJ Mo.xwe/ l ' s Equa, ' / ions

t: -I#'o'rJ

- -{*(vxi) 'a;5: -,f # dz

/j =d- 3 cc,s (unro"t - iny), /o-€ ( rl.

f a.u ' l : [o ' t -us re c<r3 <os (sr icz+-lrgtt :(4o./dy)

a < t f - . T

?: - vr Lrt"

( 5rr /a't -o. /n) _s in grro?t lxni'(wt).

ar : ftJF ./F :a. sft:or(;rto"t-o.trr)-cotrnrdf, u).

- 1 / t ^

. ^ r - - r .i : f i : 0 . /g lcos(sr to?t-o. / r ) -c-os g2,rc71

- - 0 .6L3 s i n ( rn to l t -a .orT) CA)= 73 = in f 9-rr tort - 1" ) (nA).

Lts ig photor wi th a s /ne r " f , " ten<e,

fioz,A f "'!,Zr Jd

-7-

4#1"(t +yS.

Page 2: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

F. e -+ ; = &L-.b , - - 4 r - z ? t .

TrJuced emJ ' i , t /a ,o1 ' : - f ( i l t x E , ) ' JL- r .

----7 U -- !';'#'-'(* - #*)'

- L* ,

l/L- - _ : _

in a- c/o"k,'vise. J,'r.c-*'on

H t ; ! ^ I t t o t 7R- 2nd(4+-,r)

a. ) LF L :O:. t

, , , ( . = V

(ux ! ) . gaoo . t )

: * ( r cn^o ,o4 )xo . / s i n , J t

= 0 .251 s i n / oo? t t (A ) -

b ) j { L : o .oo3E (H ) :t t t L = l O O " t x O . o o 3 g : i . { ( t ) ,

)

O,.',x /o ( w't).

, dl tD.

rc"tf

I

P e -e

/{u:qT:. (/oT x ao4)fo! = in (qtt _ 6 9. {")t, : *---7J67-

: o, to+ -sin (toov; - 49.6") 6).

t t207 / '6e . ! : '

It-)

E : Ec+l ' Stt l --9 c.,s cat x QL (o.?-z-): -Cas ta{ [o. 7 - o. t t(/ - e-us ,^rt )J- -O.39 cos c , : t ( 1+ c -os u t ) ( ,u t ) .

. / dA It - -

z * : -

t o 'zsoo( 'srn r i t +sir t2ut)

- - / .7 t d (s in A t + s t ' n Tas t )

: - / -?q u S in a t ( t + 2 asd t ) ( * f t \ .

3?

Page 3: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

P e -z

P <-g

b) .f ,,

\a.)

COndretion Current 4en-s,4y: rE

-D i sp{--ce^m.r# c., rrenf den-si *y : S' uD -J utgf,-E

f or eTua/ tn agni /u4e : f = 2zr€o€rf ,

o r f : ^ 5_^= o / r \

2r/ (€o€,,) = /9 x to' ( +) (/Q.

S.owa1er: f : /sx/o7 (+) : /oE(,1) : / (a l )

Moisf .sc, i | : f : /s x /o? ( j9 :Ztx/06(Ho),or Z z (Mllz).

I 7 \ ' ,| 0 isp lacemert <urrer tI

I Coaduc-*ion czrrent= (zT"loottoetr=bxt61

.f-7o x lo7

s o Lt rce- { rzeR - r rFa . - L ,

: q.7s x'/o-3.

Condctc fo r :

a.) u€r

4

Vx

8 u f V . F : o , E f .@ becornesV'F + rVxF:o.

Co*Aining @ a.n.l @:V"g - ]@f rF: o.

P46-1 t i , :d ;o+dr4o+drzo . g .n=8 , . * r r I r r

dn,.^ (F,- F,)=i lr,"-lni:;^"'"* z, ^ ( 4;o + dr44 - Fr):4rS .n HaE- 30 , Hr r - 4 5 .

38

V'x E :_i-f n:; /i ,-VxlD: Vx Vx lq : V (3, F)-V 'U- rVrE.

@/i.\U

o

@

a) Fr= d,3 o 3 f + a,/o (A[^) - b) 1- 2f a F2 ft).

c ) 4t- t,. i ' Jtol-9' -- 69.:o. a) "at= L;,

- / O .

Page 4: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

--J

7if,-E

-.!FF---

)

' /- It ' ,

q*l2/

)

t n

o

P 6- to Mediro | : Fr"" tpa.. ,/{e-l iurn ^ ,

,/r*&. H, husl le zero so ,n"l ,F;.,., j ,,,11n

f z::"1,::i , d-r F,- j-,, B n: B,n.E,o: Er, , dnr. ( E- Dr) : f" .

P. 6- /3 E(" , t ) :Jo c-os(zrr /oqt - kt) 1v/^) io q. i r .

Eo -- so (v/m),

f : /o7( l l ) , T :+ : to ' "Cr) ,^:f,:+#:o.z(,I),tr':+: ?o

a) A( Z : /oo . l zg^ , k r :2oc .25r r , wh i .h i s sq rnens 4 r kz : o -257 , o r T r /4 .

Tf i -s a, p/ot tF ECt):5o c4s 2rr /o7 ( t - r /s) (v/n)

b) A f 2 = - /od . /z -gx , i { i s o . r t /o foF

EG):_ro cos 777rc7( * +r/ i l (v/ , , ) ,

c) At t- r/4, we plof ve-7ss, z ti"fo(b',,r;ogsincts oi 1 o-l 4u nc-*ion :

E (2, {): to cos G *t*qq =50 cot [- a6 -]lJ: So

"ot f f (z-o.ozs) (v/ . ) .

P.6- r+ U-te pbasors qn4 cosine- r="fere.ncz.

.€-: %Eoui*, E, :4ro^oSri tr ' rz ; Er-dro,o+d. i :A

E : E, * 1:at [o.c,3; i" /o+ o.a+; iv/21: dn t- j o. 03 + o.a+( ! -i9)J-d*0.o(,r;i7''""

-+> Eoto .068 (V/ r> , , / r : -72. { " .

37

Page 5: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

n , - Fr 6 ' ; > L/se pna-sors a 'nc l Ca s ine r : . 'F< ' re-ncL '

- ,, ){, : t-6 b-4 €in/i 1;a+J* 6+ei1H=o* l l r , f i ) - -? ,u v

--'> Ho: /o-4 G1 * 2 d* )-- /cs-* i*.o' a+ j (z s in q - /,

-sr r r c( - I - O - -+ c<:3O] or n ' /e ( rc 'J ' )

: ZX 1g '4c -os -3oo : / . 73 ' l f a (A / - ) '

See 5e cf ion /o- L, PF'+zs-atf , f7t h-4 )

a-nC Cro-Z)

z?( GorJg23 x rcsT

1

H

,D.6- tz

P 4- /s o)

L/ ,l

= 0.4v (r*d/-),t u )/ a :T :

t l I: ar . f t61r = & l l

.) v-,/ ug

H, lar ae aa

/ =..; - -Ll z -a-= :F)E v ̂ > - */,1 u: '! az

lE, 0 0

:hd*# : 4h()L!* rto":;;*+.ikz - q#v";ioarz G/,n

r-: drffi* e

: - tA -2 np- Er

"-Jo'4r'z/2-O-lTb "

r=

tI '

(A l^)

(n/-1- lt l

v a l- l r - - b c

Page 6: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

:+.i1

(rc,c.)

* ) .

P.6-rg

P.6-zo

t7x t r

E-l l -n-

k- +: #g - 29v' e.^a/t^).7 r - - -

, 1 , twHn

,

o-/ .sin (lorr4 t)f z. o

sin (yonx) + doo.{ ({oir) .osftow)JJ[

' In th*o, for-

f, o- Er. Q-rr)

tit ^il,sart s in e. e/'

:4#.sino ;)/z

ln lns*ao4oneou's .{or,n ,

1-1 < n, 6 ; D : * #*R--s i n s.,u' (z rr/o?t - zo n p' /) &/'t.

sin0a

F0

In pL'r*or {or-,

E:dru---:!-orr

) r/o. ?

a t -: fuLa'io'tf

f _ :L-ftoVx H

: dl #rltto,l '*pl

s;. (totrx) ;;f " @

l : , . a t F A l t . l n \ z - 2 , L - t , , 2 . t 2+Tu qt(n3 q/ e\r? . l @ : ( tozr) '+ f '

- 'V6'o: 4oo T:-...+

f :m ?r:54-4 (*dfi).

F,om @ : / tC+z;t) : fu_( i* ; 'ut)- - 4 2. 30 x lda -s i nl1st) c"s ((n tt'et-s+.+ )

- 4 /-t tx tia cos (roz*)s;n(rrro\-s+.tz) 616

'A/,,)

'A l-).

' ' t / l,F/m/.

4l

Page 7: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

P E-zr H ( *,2 ;1) = df 2 <os (tst:4 s in (€t' rcet - f ")

({1/^)

Phasor v<ritf i sine reFerence-:

H : oy 2 cos (/S..T x) ,'f: @

t _+ v 'xH7a'-o

t f

* ,La* jf cos(rsnx)dr4-7, /sirsin<rsrr)ii1.@

n:-fu?xt:Ll= L*-*)i

Q7tnl"/t -,

F=

@: 6/ .Tnlt,rnS' . Flcos (rsn x)' ia'/t'

Cc,m,a"-ring g and @, we reTuire

(/51-)'* F": uy'o*o: W( 7 , l o t ) '

---r+ f

: /3. z7r - 4t. 6 (r+d/n).

Frun @, w. hono

Ec+z;il - L(E J'r)- : d*411 cos (trtz)sin(6tto?t- 4L 6z)

+ d"Slg s in (/Etx)cos (tr/o't-+t.< rS

4z

<vh).

Page 8: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

----i''F--

,1."

rn

WP/ore E /ecf ronaenet ic Woves

a) Jn q. soLtrce-.{.ee, con4ctcfina me-Ji",r,t wi+hconsrilq4ive p6rari1e4ers <, y'J, a.ncl tr,

87, (z- 6z)' i y E - ' T * 2Dv - - ' t

d t

: trE + e t '9-. : L

P.7- /

@EVs.(s-/eQ V,'& (7 -6 ( ) : FrE: FV.E -F'E

2: -/ fr(v^I) ' @@

v/^).

/.Jqbsf i luf ing @ in @ and no+ing lhaf V. E:O: weobfqin fhe- wa.ve. e..Tualiooin 4,rripafive rn<d/cs-:

=2 = > , : -Fv L -t(6 7 - re jf": o. o

Si^e ; /o-r(y {or i-l .

b) F", l ioo-ho*nonic {i./4s ' * *0'u,)

"nd }i*(af),Wo,ve. e-7uah'a,-r @ con verts lo /{e/nrho/t-'s eluai,bn:

V"E -7@/rE + k'E:O, wAere k -uF.

Af:+:o.3xrdicr.

R:+.:#'^3*tf= 4s x loz (m),

or 4t (k-).

j , - Rsin € : 45 x /O3 sin 19- 9": /2-x /O3(^), or /?(k) ,of : zf (#)ros/s.s..

'-: tftry = +f o-s (n/'), or aLvut 1.? Mneh.

4s

L

7-z

Page 9: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

2 Z-S Atr r , f t>e- (h" . r FcB\ l - tos +1,e, - -Fr . , - * , ,,711 (n \ :

Th",. , Fro.n Ef- (G-gcb)

Eril= J-)

qte

= {jd€

t ,: - G (u$t< ) aox 4-145 ,

E ( i l : - 7d*x l l cn)

p 7-4

or

. / -U e- )k Ct " ' k' t o

v x t-t (.e)

(-j \) e, x /1(.e.)

z \

l -1 = d, 4x /d6 <os (rorr t -1y"{) t ,a/^) .) 'o : u$\ = # - +: o. tos ( rad/a) .l : 1 l t / k r : 6 e ( n 1 .

At t = 3 x /;3 (s), we re?e;rc fh* r3u,nerrf af cosine- i,t F ,/ o " n ( t x t o - ? ) - * V + { = ! n l T . ! , h : e , t , 2 , . . .- . *

J= x3on-7 .s [+n) :Zz ,S+nry2 0 . , ) .

b) Use pA.uors wi* c.osine. rr$ez-ence-..

F: d, 4x tdL " iGy'ov+t/+-)

f ,o- -itrt< re sc,lf of problen, p. .Z^z ,

E : -lo d, x Az 4 x /66 TGkoY+'r/+)

: - do 4 x tO6 lo e?'/- o. /o.9y r 7T/4)

: _ d* /. s t x /o-? € c- o.rtsyftr/+) (V/il.

Th. ins,a.ntar?eous erryercian {o, E ir,

E fy,t2= -d* /. qt cos(ro?vt - o. {osy+ o/+) (*u/*).

( A/*,\,

++

Page 10: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

D n -r . / - 5

11 a /r I - 6

a)

U>e 1 )ho t - so rs A l ; rh Cos ine re$e rence

E rt): dr2 "-iz/G

* dy,' "-

a ztq Q/n)-

e t : / o s ( r a J / s ) - - - - - - > f : / O " / 2 ? r : / . 5 9 x / o ' ( k ' ) ,

F -- t/n (ral,/^) * A:zn/p : 2JT n (m).

u:ft=t- ",:(1e)':3,L e-l- t -- h o n.! e I | ;r:+i'-2. I ly po/a ri z-e d.

n : l Z _ l z 0 r r _ , z o 7 r / 6 \( \//€ .rc: v-E \\JL) '

F -- + drx E : fur i rz ea'z/E- a,; di=/rj ),R r ^ . -

- i

11tz, t ) : &14*, in( tcgt - z/ .n + drLcos( io6t -z/n) l (A/r , ,5

r {: .lo

t-

S r

S r '

S r n

> / t l

b x-:=- tc

i-IrII

\ 2, \cas ' { , I :

r t,/

r \

; l l

t-t e t q t l :

1 t ) - .

) .

, ) .

) .

e t - ' " r )* / '

L e i a 1 :

r -E _

:

0 ) t - k z .

d o E r o s i r t a . *

6o En n zrE,

: s ino<, ?- 2 0

d rE ros in (<+V)

k +^{)tr

b,7

E;

( E u E tt - -\ Ero Erc

Reor re .ng /ng :

(-lz--\'\F ro s r 'n ! f

cas t / + cos4s in {

cos t "@; 's in zhI Eb /

E. E, cos{r - 1Tq si ; l r

- I ,

/ r r z l_(f l l -s;o."9.\ -t4/ I

/ r \ : .+ I - \ l - 2'

\ E , s inY)

which ls *h<- e-Tctdion d an .l l ipre'r 'r ' , E,-Erplaoe.

4S

Page 11: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

ez:z G i,,en:

r r ) f * / -u ' / Eq . ( Z - l ' z ) . ' d :/

Co pf er

Kro-s s

3 x /o, (t{) , €r:2. t,

5.: { =o'oE.

ane" lV e) /G" \ /Tt ' l?': 7(7 )7 : j '48 (u7i^)

; -

l 4n

u-n=: t - x =

; - ln L: o.LZ1 (n)o) €T.(r-+q) ' T_: J 4, ( t +;S):)3s1/-+3, (e)' t e - i€ r l -zo t '

' d 7 -< ' ,

E7. (z- 4il : p = ,fi\, , *(f)',: ,,.riiiff;r''''\: + : a' o 63 (tnl '

a

'F= t : l . t?Tx/c7 (ds", .

t , c f . , * , , , t j eug:

T :

E= Ll . ?(?)' | :,- s?Yx tc' in7';. \ ,4t x:o, E :dyr i r , ' l R: +d._.r t

:2"o.21o*i(*-o.oosir)

H r+r, =dz a. z lc { t ' (*t e, 'n-(4 t lar i -z r . 4 Tx+ o,ez r d\(A,/,n\-

2,2^ s 13 +A, .oppe.r anJ /.*, at.sood conJu.{ot,/ r l r - . , - ,

'(fr)->> / , "1 :@ , t: * , ?.: (/ +) #.

9 f: l (MH=).

a-) L) | .< <48h) S ft.',)

iW

/ . = f x / os

o.4 7 x roe

6.6, / t, /{;

/ 2 . 6 x t c '

2,6t (ttj)xtd

Ttf r+j2xt64

/.9/ xrc4

o . / / x t o l

b) f =/(+H).

d6

46

'/ c- * (Np/-,) & (48/^) 5 (-)Coppe+

prn"s

g.zs ft+t)rlE

1. f t Q4)xto l

l .zqxtd

2 .T (x td

4. !6 x ro6

2- (K x 16e

2 .aq x l i

3- qq v rd'

Page 12: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

)L)

, )

P 7-q a) 5: ffiT n: ,fur:o.e? xloe (s/,-)'.

6) A+ f : /o? (Hr) , a-,|@n : l.?{ xto4 (u7/^).

2o Logroe'n": -3o (4i l . --> 2 = #*

= 1.75 xro-a(n)--a.trs (n^).

P. t -/o A^,- le (/r\o: to-' (W/cn').

a) lEl: ' /aoza^- 2. ' /s (v/r^):275 (vt*),I t+l- le l / i ; - 7.2s x to- '(4/cm): 0.zzc (ar/ , ; .

L) F^,: lEf/z'lo: /3oo (W/m')'

lE [ : g?o (v / rn) , l r ( l - 2 .63 (A/ , - ) .

P l- f t / rtrr*" cir cu/a.r/y po/ar;zol p/one wa.ve-:

E ( r , t ) : d* Eo Lot (cot -kz++) - tdyEosin (at r ' /<zt#) ,

H ( z , t ) : = , #

cos ( u t -Lz *q) - ' -+ s ;n (c , r ( . 'Lz+4)-

Poyrrh'ry vect'or, 6:E t U :4# [."t

'(t 'st'/"2*4)* s;n'fu+-/.*+]

: Ur+ > q c'ansfanl inJeped.ery{ of t anJ z.

P.7- tz E-drE"*7+Eo,

n: +v*x e : trcr E" - d"Eo)du- ta-( r, ̂ -u*) :ao*( Vol'* leJ')

P.7 ' ,3 Fro- Gaur r ' s /o , , r t , E-a ,v*T , 1a f ie re ,? rc |he- / ioecharge densiy' on the- )nne.7 c-op4uc+or.

vo : -1*, . dF : * L, (+),* E :a,#r,

Eo^ AnpbreC circ<,ta./ /aul, ft- 4#Poynfirg ve.cfor, F:E, F:ar7fu

fo,ru"r lroo-tniff e4 ov'.r qross -.secliona-l a'rea-:

P -[F.di - #[*I 'G) rdr d(:Vz.3

Y / . / .Itn/s ).

-n.oos r)

tzr r r \Q4,/'n\.

47

l

L

I

Page 13: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

PJ- /3 E, c94 = dyLts t pho-soy^t wi.l-*l

4'c'S: dl

F.r- air (me-J,"u.

&, 3-tr) : H, (z) =

aL// * rc__

' 1 t 'b

Y/.: @,: LT^:24ot 6L)( 1 , J € r € r - l o. : d, t"r-o .--

ix/:' = ar. Zr-rr ;i:r,

-io sin (/o*+ -f fi (v/-) .I

Q-- =('ne- fe-F<r.en.o- .

so {)f,vl ) t A - Q - : l o s ( , . -,) /-t c, -,fu :

; (rd[n)

T,: 7o: /a?"r (L)

F-. f o s t f -s = yneJrL>t L: fi : u' |Te, - g h4 - t ( r*J/-1.

/ \ , n fb) f : t , T-t+f :+e

/3

Fr: d,, # "2"/z , {<r,:) -dy{s;^ (tott + x/s) (u/-)

g,-- +GelxE,

* H, rryt;=-|r*t,;s;n(roTty') (A/^).

^ { * [ -J : - 1

_7 72 .

^ \ F / n C \ - - S ' i . Yv// .t : \t tr;o ) q/ e

--/ *' j Er(1t)- a, ls ;. ( tost - ax/z) (v/^).

tlV s ;n (,,ott - 4xb) C4^).Ar: td*xE*---', il.rc-,+): dn

U: /9 # : : Zoq >>l (GooJ.onJ,t*4,,r).a) S ki, cl ep+h S: #F-

- o. o €,3 (m) * 6- )."*) - *

7 . : O* j ) + = z .?6 ( t+ j ) : S . (o&- / i l c l t ) . : * .

b) fr .cr, t) =d, o.3 "-ts ' ' t t ' " .or( lo*t

-- /5.7s2,) (n/^).E ril = - rl"d", Rro) -* f r =,t) - 4 /. 6 g i,r.r trc o, (ort - t f. r s z, ! ) (vt^).

O n. : f*- (E* R') *1 t'T'o't . 'tt '7"cos{ :6, o. t 'g "-t,-7"

(w/^r-

*

4g

Page 14: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

rn)

"Jh))

ix/z

P.7- t6 a-) r:+- ; 0

b )

-, l,-H ., . ,o

+ : E r a" E ;o

H+o-4

P.7- t l e iu.n E;: Eo (d* - j ar) e- iq.o

a) Assume ref lecled qtrl - (4Er** a, E.rS .)f."

Borndory con.!i+;on a.f 2=0 : E (o) + lrlgS : g- -> ErG) : Eo G a t + yd .ia) df") df

' a, /ef t - h and circq{ar I

polariz<d Lt/ave in -z 4be<lion .

b) dn,, ( F, - i lr) - { .- -a"xlH;to> + u,cil): 4, (Fr=o ;" !#J::,:)

t U u- * dy) , H,to1: ftca">' E,ftca">' E.o) - t(id.*, dr)

R, {o) - R, to1 * H,{o1 - # ,iu, + dy) ,Js : - dr, F,,q- +'lu*-1ur\.E,tr, t) :6QnlE;tz) + Erur)"t- '

,{;r;

c))

I

(vf^).

Ca/*,).: dr- Eolta.- i ar1 €)/"* (- a, + i a;

"if'f #

:Q- €ol-z2t"r-idy) t;,., f ")eie- 2 Eo s in

f z (d- s;a utt - d.,co" ot ).

n o r r n a . / , ' n . i d e n c e - :

1 + f - t , wh-r . l f l

I_+ l " l = l f l , f <0,an4,1,---"--"" '?, - 3\" - lf l : *5 :

#- -1. '--'-r' Sar:2o(osro3 :?.s+ (48).

41

P. z- tg Fo.

G.

a(vr^)'w/,*)

st.' l r : 2 ' l t '

Page 15: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

P, i - /1 [ , t i :dx . /c i j { " ( , t / ,n) .- /O ' i6z

+ r1. (z) : 4 / jT e- 6 / - )

t

o- i r : i l , : I = '

+ ' + r-<) : 6c. - / - {x/c?Ga}/s)

{ossy m-J iu , . ' r , { ' } - , = 2 .25 t Ton f , = {

- " . ,

.

E7 rt-42): o,: #)T: +(!)+: /.ss( t - rs) : I =a. t . l f r f ,u 1f l f

t= , f . ' ' ' , , ' * ; tV) : : 7- i o

&pt^)(ra.A /r-,).d^-7 '

Eo.

I '

(z^+q), 2,: E (,* i *) : # (," i!):zs+i"in)T - - n . i t c q . q c

_ __. ! - :__i ,_L : A . t Cg e, ' -

, - '

nr * i t w ' - \

: 4 + f - : O . - {Og . r rD .O ? * : O .goE . i l ' t '

, : :) E,ir) - A*- z,og e' (62 + te7'1's

(v/^).

J.et = t , r -d;x

E-t") : j , ? a"x dr) z.n8 ui , l t ' * rgt .?o)

= - dyo .oosS s i (e7+ teJ ' r ' ) (a / i ,

Er[r)= a* (, Er) e' '""€if '" *d*&os {^tt". ' i(?'toz-s'r ') 1v/^).

ftrfO: ay # '/ ' t t z

"-a'(7'toz'5' /")

-/. ts z. - i ct . taz r 3. +o) (A/^): qY o ,o3z e

/

- | + l f I- \ :{ - t r l

l +o . t cg| - o . zog - t ' > t .

(6 \ :\u avtt ig* (E; ̂ -ui + E-,r F:)

# i2'?o"cag s.so

(w/n).

(q)=\ varl:

:

7n(Err4)=d,-2.rOz

4 o Q , l L 7 e

SO

Page 16: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

F_

)

)

P z ' zo G in .n E , { . , 2 ) = dy lg s tGx+ rz \ ( v / ^ )

4 k.:6, k"=e --* k: p:,[Q*T, - to (ra//,-)-t-: t tr/k- ztr/tO= o,6zg (-), f - e./s-*tgstot(11'); b: Lc:3xto1(rad/s).

0 F r { r , r ; t )=ay /o cas (s * /o t t -6 ' -92 ) ( v t4

F, k,zy - f"4,, r, l4:.: k

: d*o.6 * 4o s ,') ,,,: krr,0,1* Qo.r) *al lo "-)(€-rt"':(+m,4*;r-i(6.'*sz)

F;G,"; t)- C 4r 'r : 4#) 'o '(3x 1o?7 - 1z - {z) (A/n) '

d Cos 9 ; = 4 -n i '42 : (4 ) Or= o . t -F 0 ; - .o r - 'o . { -36-?"

d) E;(r,o7 * E, (*, O-;' - E.{r.z) : -a> to d}'(62-sz)

Fr t r , - - t : a roar rxE. {42) " .d r r :

d ' , o '6 -6 ' "0 's ' )

: - (+h*a,h) 6 iG'-rz)<) E,G,z): E,(.ri l ' t ,rr,o>--'ay to ( a-it '- e28z);;6t

= --? izo d)"* s; n tz ( v /^) .

H,(z,z)= l l l ,z)+ Hr(x,r1 = -(a'fu cos 9z + orfr s;n t)€i6' A/i l.

+ oi8'si rrtl ' - ' , -

) p/,,1.P Z'zt SnellL /o,o o{ reFlec4ion i €r: o; =3ol

Sn"-$L h" +I re.$ra-c$ion:

0 r : / 9 . 4 t ] cas g *= O .943 .

T, : 'Jo- 372 (rr7, T,:e : #:25/

(r l, l '

a \ l - , _ T *cos€ , . - l , eose t : _0 ,24 !

l " cosha? . t cose ,aL: 1 + l t - 1 -o .211 : 0 .791,

b) F,on Ef C7-l+D' QC*,,):4rT€io "-il^(x'sine'+zcaser)'

f,- ,6r, * Fr(xrz$)* dr/s-z cos (zttft -t 'osx-z'7ez) (Vl-)= 1fta4/n) rc. ./,

F, o - €y. 0^ /+ z), \ t r, ",

: #( drco s €, +dos i, er) € 2 (./'ot 2( + 2'e 1?)

-+ Rrk,z;t) : o-odG dro.g+l +aro-zzz)cos{znro?t - logz'2.?&l@/-;'

sin gr: ,[2*t,n er: t

5 ' l

Page 17: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

P l - zz Fro n , p roL f , ,n P .7- i { ;

€ r :6 i - 3o " , Qt - /7 .+z :

' / l 7 9 t t d - ? 4 3 . + 3 " ? x o - E 6 d

,,t)

?1 : 377 ( JL ) , T - : z r l 6 : . ) .

c) Frorn f q. (z- / rs) t r, : -a" cas 9t - 17' c'as 0;7 ' t { ) lncvs €, + 1, ios ?1

7 t / x 0 . 7 4 3 - 3 2 2 x 4 8 6 6 : _ 0 . / S g .

f rom €7. O- /5a) :

T, - ( t + r.\ ?. ' .e+ : o. 772'-[ \

' "ll./ zo.s €.

X; tnz) : ZZ o,oEl "4'G

s'raoi+ r 'ect6')

n es ln'x lcf 2:r/f , : T - - ; ro t :T

r--

f r r -q l7 ' i ;o-V€nrf r :T

i , r t , z )= d"o-os3 u2( '74+rz ' / i )L /

'/ (a/*,).

i r, -, +, e -,' 9 o ), f,r-- cx, z ) : / 9. i s (a1. rc{' lo. r7 [r' (' at " tr z/'d6

v/a.l.

Ern : T , E ;o : O . ?Z t x l i . f z - - / 5 .+2o * t a I Vl F.1,/ .

rr f otr) E,

- l O - 0 - t g

'ot. (z-/r+) ond (z-ts-r),

Eruri - /f, 1z ({ra.7+l -,4anl) "-i

{r-or' * x.t6 2)

l

t;I

( "aJ i ,n ) .

( ro" l,-). tu

7rut, wiy'h a. --esin'e re,kranEe,

\ f tz;*): /5. (z (d-o.7rt- +o-stt cosQzaf*-/-or7-z.7tz) fvr-).

o 4 / cos (zt /o't - /. osr- z-?( t) '

C{4w

g2E!r

fEL*__

Page 18: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

lF--

P. z-z+ =""r:

t ffrom f7.(y-/iD'

u)f ro^ Eq ft-i4.?):

: fvlz on4 €t' : 60o

7,/1,<4t;r:-i yo/,tt , ?r/?o = -i/,|r.s in €r- P s in e, - - j /2 , cos gt=JV/2, co: er=/ /2 .

' t [o L

f , - ( . \ b / . 4 o ) ( o t E ! - c o s e t : o ) ) o 7 o

( 1 F / n ) c o s 0 t ' * c o s € ,

- l'(n/r).

'o

) rvn).

L

Fru. 87. (T-/4t): 7 . : ' r - 2 (7? / rb ) . coss ; - - o . s " i t s . s "(l p/1)<os o1 f cas 0t )

b)From Er.(v-/sg: r,,: ff i ,* ")zt"F.o,n 87. 0-ltf l ; zu

lfrl: l4l: t , Lut lhe phaseshif t o{ l l .- re}/ec-ted L^./ave.dep<-nds on t'he polariz..alion of fhe iociJ<.a* wa,ve. fh"re

Qre sfa.nr l in3 tA/Ave.s in i l ' te. a. i r anJ expone-n{ ia/ ly o 'ecoy-

ing l ran-smi+ /e^J \Na,ve t in +he- ionosphere .

P z- zE kr) * kri : t: : r^i7o€, -jat7ofr. @Conlinuily con4ffions a* z=O h. o// z aa4y feTuito:

krr: krr: atffi sinQ; : fr-z.o?rrc1 @Lrr : f r r - ja, O

Comb;ning @, @ a.nd @, wo caa solve {gt dzzand Fzzin fermso{ a , /o ,€2 , %, a rd

fn . .8u1 , s incc

fi .. 0tVo1 ,wo hone dz=422=

Fr, =

f -r/tr;a"q - o.3?74 (;t).

a) o, - to,-' f

= b^n ffixfi1 it;.:r;.r-' (rad)

s3

Page 19: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

b) fr l l =. L

o-o j93 (tr) t Ztz cos 88oz o.olst (l+2) - o.c2H ein/!

c) t o l ogn? -4 t z : - 3o . - zl - q'

W:8 '6? (n) .

S n e l l i / a r v '

S i n e . I: _ ,S i n g 1 n

€ t = s i " , " ( * s ; " e ) .

Cos€) ra lm

l ,-IE:E.taae-,dffi= ##: E sin (9; - e) -

#T (sin -a,. cas 8r- cat O; sia gr)

=dsine,ft- f f i ]

_ Z 1 r c o t € ;'lrcotl 1

Tocos e;2 x o . o q q t ( l s i )

fr r, nis-o.oes3or11.(os €r- bs o.o3a Z | .

a)

b)

,) j , - 6D

P,7-zr

t,

a ) S i n o : / 8 . 4/ E V € ,| in er -Je sin e; ) I {c, Q.}€.,cot o, =-jrlTffi\;4 .

Fron €7s. (z-t4t) qnd C.l-/+z):

4rt ,z) = dy t ro. ' * t " 4 ' i f " t ,

sF, t,,21=

f (o, i n, * 4{7,s;n e,)i"'" eiluI

IywhsTs

f-,- frsin tr - AIE sin e. ,

"r: f, / (+) stn'q.-t ,

{ro- 87.(r-r+st.

D (a*;r,: t CI* ( Ery rtl, ) : o.

.r+

t . :to |/

nErr!

_ _ , L

,D .7 -26

Z t, cos a.. E iory, c os e; -i7,

rl-@^,a - t

Page 20: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

(r,j).

7-

,2 -? -28- G iv . , 0 i=€ . . - - - r - - 4 :T /2 , cos0 t -o .

a) Fron Eq 7-t'+'s ): ( f.ro/E;), : 2 .' , 5 )

F ron Eg (7 - /s '9 ) : ( E ro , / E : ) r t : Z r1 rh , ., ) F, . (x,z i t ) = dl E;o cos w f t

- ! ( r s in g, .+ z Cos ur) f ,

E* t ^ , r ; t ) : dy2 E .oe-n ' .os u ( t - ! x s i r - r€s )= dy 2 f ,o " - "= cos u( t - ! x s in€r . ) ,

where " : ry@;;r j t

-6 ,when o-o, ,

F.z-zg

b)

P.7- to

. \

d )

a) O .= S in - , rm , , - s i n - tm =6 .39 , .

e ;=zoc >ec . t ; ne t=Gs ine , : J . gg cos g * : - 72 .9 t .

,- .,8, cot g: -I , : a_ , : : , " o t

o , - u i t g ' = z i o . (6' v /€r , coter '+ cgs et

z = -- !- /dt !ot ej-- = l .g? ,s?t ' - / . t i c io. t ,L G , c o s e , . I c o t e t " e J e

The /ransmilloal wave in airlvhero

At/e,nuo*/on in qi" {or each= 2o logro e'arLo - | s g

varics as "'<^z

a')fux=

*(z.eD.r,<tava/angil1

(d 8).

'*u'

Wh", |heincidar# l ;ghf { i ,sf s*r i les lAc Aypo-

* e n L t s c | u r { a c a , 0 i - O t = O , 1 = # ,

(fo)r, - 4o T.t : . 4,rorl,

,(o"-); 'lz ' (,lr' 7r)'

Total ref/eclions occur inside fhc prism a*both s lan l ing sur faces bccause

0; - 4 t " ) o .= s io - ' ( * ) - -10 . .

ss

Page 21: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

On oxil {ror.,

(Oo).

frt \\ v a v 4 l

. (o*)2(@*),.

*hc 7rism , Tr= ffi,

- 3- n' : .4tX-?o z (72*?) '

f 4 %'h 7' r 4,/7, 72- 16'1 =l oq, -6'7e

a) no s in €o : h t s i n (96 " - A " ) - t l t cos Qc

: n1,[i4.: ',rQ7trj =,msin 0o- +tF4 :,f;ft (no= t)- ) l

P.7-3 t

b) N . A . : s i t - t en :vm = 0 .196 / ,

€a_ : . f i n - t o .?861 : go .4o .

= s i noa ! . - 9 * *e * * t t / 2 .

D rro, Varallal po/arization and €, * €, .

P. z-sza) For perpend;cu/qr po/arizc*;on and

/u,* Vr:s in e r t= fr@

Llndcr condition o{ ns re{lection:

o,sq=/tE-' ' r ' -u

l t * ( tS

sin gr, _ |

cot et -

= S in 9 rU _ Or , en=n /2 ,

s6

Page 22: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

Y_a

P. Z-Sl Fo r f wo confg u 6 Lts med ia wi+f i eTct a_/

perrute-a-bi/t+y a-nd f ermit+iwities €, an./ <, \.,y,e

ha-w e {ro* Er, (z -/zo) e<:. -sr o- GJ",, d.oJr4 rom f,7, (Z - / E+): OB|F fon4Qe,

. " . s in e- : ton 0n,

< t / 1 2 Qst

/1

o.5Ill

4s

{ o

;"4 9 "30"2 o.7'

t c.+'

?o"c4 7 "

{5 '

3 ' . 3 "

il.€

t7.5 '

t

I

E7

I

Page 23: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

triI

T

!i '

t.

[.

a lW' - lI rans t r l t ss t on L t nes

.2 g:- t 5q bsl i {<t t , , ' .g f f t . (s- /7) anJ (c- r { ) ' 'n E7'G-+9"

n-4re-zr= T, / <

d':'[T d -

t fw:E*

v^/' = 2 u/.

a1 Dr Parr

q- .

.Ji. parf g .

{o - po* . .

: r 7 = d l -V : d lZ-L i t 4 0 w r , l 2 e u l V ' €

- \ 7 - 2 "1 l - t t - : A ,17Y , ' 4 t w / i i - W V 4

. tA / ' - d { :

: U b o,' ,/,f'< i

u?b

up.

.---+

: +t6 /, /L-

"p/,iz

, \ A

l ' { ' Z Q i v e n :

j ' s ' x rc ' (H i l .

R- *re': t.tt (tt/^).L=f * - o . t i 7 (yu /n ) ,

G=t t a o .oos (S /m) ,

C =€ t

: o . r , t (aF /n) .

l l-t tEfr

= lt - 4.t57rto'r.t t L = 4 7 3 . 5 > > A , L ) C = 0 . 6 6 7 > ) C .

> = j ' , [G [ , . * (# . : ; t ) ] -o ' t2 j ' j t t -14 (n ' t ) ,

zo',/E [,. i &- #)] = 27.27+2o.t3 (g-

5s

4 = , ' . 6 r lO ' (S /n ) , w = O .oZ (m) , s ! * , 2 .5 ' l o -3 (a ) .

Lo*/ diohctri" slab : / -f o, €,- j , 6'- 1ti ' 6/n).

a)

b)

c)

Page 24: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

-

t

(g-+ 9.

P. s-s

P 8-4

6) Fo, coaxial {rancm&sian /ine:

z,- *,8 l, (H 1,r',. h e) = rs*= n . t , - b : J . 9 t , / o ' t ( ^ ) .

From E7. G-crs, 4 - 4[7: .

' f f i1-3oo (tL).(n).

e: - J

/ )Fro,n Ey.@-zE)a.nd (s-z/.. o( =

f rom /<A/e . ? - / ; L - * f *

A.r - E t b

Z n { ' e L ^ d

. * )

t t )

o ) .

: 2.6 / x /o-4 (fL).p - L .€Jx to ' i 7 | ( \z7r - ( # " ff)* ror- o. os (e).

# : /. o6t r /o-t (t(p/*,): ?. z, x /d3 qAB Iil.

7.: [email protected] V Ca rjut)

P. e-s

R- = aZo- d.o sl1 (nf, .) ,

a=+*t-23 (f s/^),L: + : o.2.o (f urt ),e: +'Fo (pr/^)

sq

For coppzr q.t / (/tt1), A.:

€7 G^ts)'

Giv.n Zo:50" io UL)-1>- re ly r . . . l ,t9r1 (z): 0 --+

*: * - L (Oistor/,on/e,, l;n").

G i ven' i : :. :('i'!!/r;,"'f :i.{

ruBr^)

F'o'n rr f:!?; li;ril ^--# , p=@8, zo=,tg

tr (obx 4t rd7s. g, /o"

Page 25: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

Ps-s ( P^,)": ( P,),

P 8-7

P.8 -g

= l v . l t 2 ; ,(Pr*2;)'+ (xr+x;f

h naximize ({ . )L , sei t++

=o.

and u" f : ' ' : o

Mor . (P^ , ) ,= ! ' : l ' - (P -'L 4 Rl , ,o")r, .

- ! a-[u, zi ] z;v; :4vg- V .l i : f r '-t -''

I o, =or, X,=-xj)

o, z;=Zi.

a) -{-ez , - .#=n,

| -+=- pGv,t d z -

| !#:a.EIV(z) : Vo+e-<z * Vo ' c " ' ,

7.G) - I lo t t a I i c - ' , . ( - , f f i .

4- +=Ro:E

r i t

a)

b)

+ Max. powo.r- l ran#cr c#i u 'cncy = 50% .

V(z) - Vrt.'" + ('e1, ,

I121: I| ;)' + Ii er'.

z=O ; V(o)-V; - Vo* * \/c , I(oS- Jr.= Il * I; = ltu,,-US.--> Vo' - t

(4 * J,Zo), V-, = * ( U; - l,Zo1.

V (z) = * U, riZ) oj>" + ! tu, - z, z) 1",

L Gt = fio(v, ,7,so1 i'- +(v, - r,zo1e'z .

V {27 - V, c rh 7z - J;Zo sinh }z ,a 0)- Z; coshr, -

t s inh^rz.

I

b)

)&

Page 26: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

?r, n,Vo* Zr.

6 l

-7-

( i = - X j

We- have V(4 = t(ur* r;p);'z

z(z)- +H:rr;)o-"wherc \

2. '' i - &vc

anc i

c) For an in{;nito l inc, 2,- Ro '

Vtzl - #r .qrru ' ' " , rh)

+ f (u;-z,n)eal

- ! (#,-',){',t - .-.-h-

V. -12: T;70e

P s-q

d) Fo, a finitu lino o{ lnnglh / {ermtn<fe4 rh4t'

Q;:4#ffi

Lis*orl,anlctt /inc, 4o=rff : So (l;-), 2 - o.s (tL/n),lv' 'uo)l

"avt"^ ({t) :tan (#) - o. oott.- # = o.oots; 3 =gooortxo.oolS=4e.2= *-L: # : o.o/t (H/^), c- #

:4.42 (Vrtd.4:

h = o.ola (Nf/n), p:u,/E:5.s5 (rad/m).

a-) V{21- #t "-<z "-}pz

: #

;o'atz 6is'rrz ; .re)= #.

. ' . V(z, t )= 5.27 elQ'atz s in (gooorr t - 9.952-o'322) (0,

f (z, t )= o. los €o'o 'zsin (goooTt -s.stz- 0.rzz) t l>.b) A+ z : So (m): V(to,il= 3.Zo Sin (Sooort- O.+lZr) (0,

I (ro,t): O.o6$sin (goootrt-O.L?zv) U\

c) (Po,)L= ;tulurtil

- / (s-^o, o.oe4) : 0./o2 ( w).

I

Page 27: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

,,, V,

V.* Zr.

( i = - X 9

f l' 9 '

-7-

e) For an inf;nito l ine , 2,- Ro ,

VtzS - +-uru''", r(z): ffi; ':d) F", a {;nitu lin. o{ lnnglh ! {e.rmin<fcd thA"'

2;:Pr#ffi

L isforl,anlc"t line' Ao-E - so (JL), P - o. g (lL/n),

Wc have Vtzl = t(U.. z;R);"z

J(z)- +(Y^:rz;)o-"

Y - ffiu, and

tf (u;-z,n)eal

-; G'',)r''whorc

:ur''uls)),

U

P 8-qt"" (&) :tan (#) - o. eot{.- f? = o.Oots; 3 = gooorrx O.ootr = 4e .2 = *.L: #:o.ou (H/^), c- #:4.42 (pr ld.4:

h = o.o/o (Nf/n), f:es,{E

=5.s5(rad/m).

a-) v{27- #z "-<2"-}pz :

# {4o/z 1i*srz; rQ)= #.. ' . V(z, t )= s.27 € 'aoft s in (Soaorr t - g-e5z -o,32:-) (0,

f (z,t)= o.los €o'o'z s i n (gooo?rt - 9. s52 - 0. 3zz) tl>.b) A+ z: So(m): V(ro, t )=3.2o Sin (Sooort-Q43Zt) (0,

7 (fo, t): o. 06l s in (trooorrt-0.+?zv) U).

c) (P.u)L= ;tu| urtil - / (s-"o, o.oq> : 0.'toz ( w).

6 l1

Page 28: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

P. s- :o a) , co r a sho r f - c - i r cc t i t ed l i ne r Je . ( Zc=0 inE< ; .G-? -< )

lc ob*ain J -2>zZir : ZofanhU : \ f f i t f .

Ftr ,L: )-/4 , /:.L: rr/2, d)./z << | .

Z;r:".--;ffi=zoffi= 4 2.., /ax .

b ) Fo r . r n opon -< i r cq i r eC / i ne , se t Z r - ->a i n

to ob ta in :Z ro: Zo cot h7.,2.,= Z, ffi-

For A:A/+, z;o: zrffi z)":,jt-:t!r o - o / - e 'a y a (1-a;-fiz Zoax/+.

fL: ! ! t=+-4eoo,f ^^

/ l - lon 4goo = - / .732 ,

Z. = z z+ - t! 9"fr? - so G-2'it.d'i.tc.(tttz)aa t r r l z s tan rg . { - - @

= ?6.3 ' iq .s t &) .

G;ucn , Z a : Zo cofh >l - 2So /'s9-" Ut) ,

Z;, = Zo to.n 1! = 35g / 20' ( lL) .

20'6Zo = 3oo &,o = 2s?.8 - j tz .e &) .- f q

t^ A >2 = rlt

- 1.2 /]5' = o.grs +i6tr =tanlrQJ'1/D.

, .1 -=4(m) . . - * 1 : o . t39 (N1 /n ) ,

F = o. z ts (rad/m).

,= [@- n - , f f i{ e+ iuc ' r= '@)

-.-+ 2+jaL =)2, ) G*j ,oc - 7Ito

Q - f c

= O . 2 3 5 r 3 x f O o : a 7 o - f x l O t

we obto;n: R - sg.6(a) , L =o. t t2

G- 0 .246 (mSfu t ) , C * r2 .4

t7 G-i.*)

D Q - t t

P8- /2

a)

b)

f.( r a d f t , 1 .

tp4/^),( f F /E) .

62

Page 29: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

i t7.G-7e)

7-t

ii

!

€7.G-tx)

P. s- ts

P.s-/4

a-)

b)

a) Since ihe l in. is verY shorf compa'ed lo a '

we.velrrglh , ye AoZ use Eit '(s'f l) and (t '83)'

, : #,:9 x 1s-t' 1s/^r, l o _.[, :74. s GL).

L-- 4y - s x ro'', (H,/^) j ^, 't c

LC

/J€ : LC --+ €,: f f i : 4.05.

F : +p= 2rrx /o',8 - 0' 42 (rad/m); f L=?'f :: o'':?!iJr.

X,o- -R.ocot Pt' - 'h - - 2g o (JL),

Xr,: QotanflJ uL/ ' - l9 '2 (n) '

fo , /ooJ i -p-dancc

Zt: R"* jXr '

l * - t l , f ( r r -qst*- /l Z z t -

1 4+ t | ,f cr,-, r)'-xtI t t O I

p, /zo onJ t t : X t /zo .

Wh"n - t vL

'z)B

l r l : s - l =l r I

s + l

whore

+ k L

IIt -IIL

- 2

fL

- J -

- +J (to rr- z r]-s)/s

b) S:3 o .nJ r " : /9o/zr :2 .

LL: * ' 'El '

Yt : PL Zo : + 71.8 (g) .

Page 30: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

,:_s 4! Fo,

lr l"a. loss I .t" J i. "- , Zo- Qo .

_ | (a,-p) . ixL. l ' _ (cr- t ) ' * x l| (21+Q)* jX, l - T.rhf f i ,Rt ' ' 2r ) " *X ; 2

, ' \ . ' , r i - r i a'-./ _. et ., _t : 0. + Ro _ jT: *t(4 ,-;.r)'lr. S c()pres1)ondt *-^ c- lni,.t'oruo,, lt-I .

Fo" Z, - 40 + A to (I>),, R.o - ,f4-"-3d : .5o (llr.

b) Min. ir l :,tW =,1@ = +.I ' V 4 ' P r V g o + 4 4 J

( v l ;n .S : t r * * :2r - = -

L'!:* Lott lrtu lin. oF chc",ra eferry4i Fes ;r1or-,<e_ l?i ,(e.-rg:th.L' on4 fe-rrxinxlrAg in 2L , (f,-orn tq X-rq)

zi_R; ffi,*#;,zt: P;$;-e!t

Ai- iz i t

l r /a v, s et Z; :5o (Jr) +n d

to + j/o - po' t##

t -'f,rn frL'.

Z t -10+J /6CJ \_> ,

-* {h1iL lo4

.So /..t in1 :

a n e {

+ |oot : So pJ,- zooo t= - (R ' ) 2 t .

a /

Ko :36.7 ( - f - ) ,t : tqnF. l ' :A7zS-

I

.I-'- o. tos ,\ .

64

Page 31: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

P. g- t t r , \Lq . ( g -7? / : ^ .

/ - | k ; +2Xr. _ p Rt * i Ro ton B/-'-o ,4,o + ?' Rt b; f,g_

x,- p,E,

, , : t , d.nJ t - -*n

: 1+ i 1 . _I + 1 , r . t

z - L

Let rc . - Rr-RD

, /.- --I p/

- -*1"( t +zc; t ) : \ ' 't f ( { - r t r , ) : x ;

So /u i n? , w - o /> /a - ; n t

l ' - t t tL ' L

6s

#: er-z7zl

: O . 2 7 .

P.g-rs a) lf l :#: #77 I;n 4 €, , vvril< 87. Cr-7il a_s

v ( z') - i',' ;.:3:' :,:7,:i,: ::',:,'r'' 3

: +(zr+R)ei f { f r+[ f l r i4f ,Vo ffag. /x rvrinimqm wh-n 4 : laf ,

or wh.n oe: 2 (gx o.3, \_TT. ' , f =

* e?o.2 i r : o -27o+5o. rq6.

I: - ,3

D 2,.-po (#)=3oo (ffi): + 66 +. j zo6 CSL).

Tti___

Page 32: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

e s- !L Q;uen

* )

F.o,4 F;3. r--s,

z.{o , ! -

U; : o | /o" <v), zs- Zo - So {!l).,,4,r: 25 (,fZ) : o.5 Zo . I :

?r : 2 t - P a : - L' L ' R , + t l . o 3

F'L , -

- 1 a

7 r , V a '- o ' * i r

T V "/ - : + r

< .{-o + ..Q2.

Z . + J t * " , f l \-/ 4 i-*.ry7/t

. t O. . , /1/ !1 t , - . - i ro* E7-(E-Zs),

Z i : 7o o's zo +; zot^o f !' = 2^ l-'i-2&ag-

2o +i 0.5 zoA"f& oo 2--+ i r^- /Bl

: -3 *:;-a' |;- '/ - 2 /3 i6 ( r+ j+J^ ,3 j ) ' s 3 L

(v).

( -A) ,

+, f.t:(*)+: T, {onf,t:7V: *(ff i) - o. s2? /*/8.+' (u)J;=3 (+#r)= / .os4,r-/ tr .4" (^A).

l rVLen T/S is cannec/eJ lo*he l ine, o vc/ lon+,/ !a.ve #

.eo arnf i;4ud+ #,W 4.a-ve(s towqrd iO. ,o^d p.L,

erc ivin3 v+,i+h qi oLp/,'+,tJu V, = #dil4 6rAic6

C-a,cr se,s a re$/ec-leJ v<q,'re vsith on a.nptlude-V.-: CV'-7he ref Iec*e.4 wdve 4raveb Lactr hwa,rd (6e qenera.lor and

is nol re€fec-fed lhe-re bec;a."r .se- Z€- Zo, ancl Fc=O

.'. Vt : }ft nift (t +t-r) - + e4fl - q 03 i /-45oSin,;/a,/y. 7r=

#r€;# (-C): + e-ifL --t.33s1-as'

5= #: s=.( Po, ), =

{ A. ( u, tf ) = + ( S) G, k;t) = 2. z L x o r (w)= 0.a 4 (m w)

z l f t= zo- ,so( tL) , F" :0 . (P^) "= #" -c , .o2s (nw) .

(mofcheJ <o^di ( ion)

(0.

(rrd.

b)

c)

66

Page 33: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

P s-zo I - 2 r ld (Hr ) , A- f= tscm) .

Apcn-<i rcu i la l l , rm, ,4 - I (n) , lh- o .667.S,ori+h cAarf : Sla,l {roo fl, on tAe dxlrottc r,gAt, rolzltc/ocl<wis. on3comy'olc rouo/u],bo (az'- A/z) andcoajiauc, u, {"r an a,!4t1|ona/ o. 167J- /o o.4lr-\ on

fh o " wo rc /e" lA 1z vat d gi n < ralo r

".

o/., A_e.a.dx--;io.t7f. - Z, - /s x (-)o.r?s) --j+t.r &).D.ran a s#aiglrr lioe f.orr, tit (o-jo.s?t) pohl tArcugh*Ac cs.n*cr and in{crsccl ct! (o*jt.7+) on /_1c oTTosikside e{ l to cAar}. _-._, y - +t $r.74), jo.ozt2 (g.Shor t - c t rcu i ted l ino, I = o. t i3 , . ! . / .+-o.s13..f*arl {rom {te cy/raoo /cf/ poiol pr, , rcfalc clockw/tcone eompltlc r<volu/ioa a6r1 cor,lia;e oo {or an &dite,tal0 , 0 3 3 J . ' l o r s a d

D raw a sfra,str i::r;:i i;:li,i,i!,7 ii;i u2)

*ho ccnler aad iniorsccl at (O-i+.rcjon$cop{uAsidc o{ **e c$er / l * v -

* ,Ojdzt )= j i .o4t G) .

a)

b)

F. g-z t,{ , r - * ( n + 4 r c ) = 0 . 6 1 j o . 2 .

a) l . Localc 2r-0.6+jo.z on5.ri+h charl ( Po;.t pt).

2. WiiA cen*ar al O draw a lfl-eirelc 4treugh p,, inletocliaEO P e a t 1 . 7 7 . - t ' - . ! = 1 . 2 7 .

b)

c)

v L -

anJ

ot (nw)

lv).

nA).

r - # oitle'- o.zg cir.l '

l, Draw line OP,, inlcrtecJ,hg thopor;phery al Q'.Aca4 o.0+6 on nwavo/tagtAs

lowaed gcncralor'lcalq

2. Move clocL*i t t by o.1o11 h o.t l , (Po;^tpl) .

J. Jorh O and Pr' , inltrsecltngthc lff-cirele al Q.1 . & .ad z ; - | + jo .sg a t p r .

2,. - SOr; - go +jzg.g Cn).

67

Page 34: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

J) Exl.. td /;r* pr 'pro lo Pt. Lcod f;- o. ls-, io.el.

\:' lT l; = o,ots -jo-oog 6).

e) Thoro is

h -

/ . 6 ' : z

P. s-23

t.) l. Draw i'iac 0Q , ialcrscc*ing |hopcriphcry al F;' '

Load o,+t+ 9n ryuta'velengths 1z'^.-tg gen<rzr:'2"'

S c a { e .2. lVore r . iockwit by o./ . t^ fc o.c-Eg (Po;rt 4 ') .3-Jain O and Pr ' , inhrtu<l ingt6e l f lc i r<le- ot 1.

4 . R c a d ; , 1 2 o . 6 t + 1 o . 2 3 a t Q .

Er - S0 z ; = 3O,S + ;L | / .9 @) .

., i) fylcn1 /ioe dr'Pro lo P, . R-cad /;:/.+z-ia.s+.'{;-

* !;- 0.02g+-2'o.o/o8 G).

0 Thu. is a voltag+ ninitaum at ,!'o.oJ6,\.

no vo/.lag4 77ininu4*'t on lhc/inc-rbuf '1<Vr.

zr= * ( ro -1 to) - o.6 ' jo.2

d) Lacale zLu 0.6- jo.2 on S^,1+1,

chari ( Pt;^t P,). ttVi*h

cenlar c;j O draw a- lf l<.;rcjc/1r.o u3h 1, inlcrt te* ing / inc

APr . a i / .77 . 4 S -1 .77 .

S ) f a o . 2 t r i z t l '

x / 2 - 2 l , A n ' f , ? ( < m ) .

Firt* vollz.ga nr'nirn.tr,rt Qcc-urs af t!- * - O-t t\.

a) l. Slarl frorn Pr" and ro{arfcCaun{crcjoc.,wht o. t o r\

fornard thc loa,d to Pr',

2. Droq fhe lf l-cireto,inlvstci-ing linc oPo, al Z (S.Z).

3. Ioin ofl', ialorsccling l*e lrl-et ' relo al Pt.

iI

Page 35: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

I '

" 2S^;4t

rh'kicr,lt

;ng L'nc. t .77 .

l x .

,9'l-

4. 2oad zr.= o.6ts -jo.lts.

+ Zr-9oL- 3j'75-i2t'7t (n).

6) f=+lf t ,=*" izst.s. 'c) If Zr= O, *hc f;rsl voltago ninimun would be at

Zi=\/Z - 25 (c^) fro^ *$e shat-cireuil .

P I -z+

a . )

f = 2x tos (H ' ) ,

-\. = /. 5 (,^). + I : ?

- o. 3,/5(^)

C horor*er is/ ic )rnper/n-nce of Tctctr ler-

; , ,v i re ' {vwo-r,y ire

l r o n t , n , ' s s i o n / , ' n . , 2 ^ : r / z 3 A ' 3 o o - - / 4 g ( L ) .

Co, o /ort/e's air //ne., f,rorn E7' (s'ss ) a-n4 (r-z+),

7 l LH , - ) t :'o = lt - +/{: cosh-' (*)

/+ g -- 7y6: corl"-, (*)

Qiron D : 2 (c-) - a(wire roJ;,r) = 0. 94 (cn)

P s-zs zt = (2s +2>r)/so = 0,9 t j o . - 9 , y r= / - h ,

See con"/rc.e't'ion.

P , t Z " -0 .g r i o .E .

Pr : Yt= / ' i / = YsrPr t Y r r= l+ j l ,

+J , : o '

* Jz : O. /6 L^+ (a. s-o. ? I il_\: o .324 ) - .

^ l l

G : bu= /, -rl,=(o.z;*ot2s)^-: O - 7 T S X .

$': bgr=-? l.u{- (o. t7r- o.2 s))_-= o-/acx.

ttF

&tII

t"_

6g

Page 36: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

, '2

S-,4t1

rl)'kicr.ir,

i rrg h'ac

. t . 77 .

l x .

\,

iJ,

't-

*. 2oad zt= o.6ts -jo.tzs.

* Zr-jozt- 33.75-j2t.7g (n).

6) f :# t ,=*" i :s t .s . '

c) If Zr= O, *Ao firsl voltagc niainun would be at

Zi- ^/Z ' 2f (c^) fro^ +$e shot-cireuil .

P I -z+ f = 2x tos (H. ) ,

.\ = /. S ('^). + I : + : o. 3'/F(^)

C horor*er) s / ic ) rn leJnt ' , re # 7 ucrr ler - i ,v i re ' lvvo-r ,v i re

l ront ,n |ss ion / , 'n . , 2o: r , fETTi{ : /48 (L) '

,Cor o /otr/er', air /,'ne, [.o,-, E7' k-:e ) an4 (r-z+),

"o= lT - +/t: cost>-,(*),/4y = Ac Lorl ,- ,(*)

Q;ven D : 2 (c-) - a(wir. roJ;rr) = o. 94 (c-).

P g-zs zr: (zs +;: .r) /so = g ,g t j o .S , f r : / - * .

a.) See conslrcaetion,

P , t Z " : 0 -5+7o .9 .

P " t / t = l ' t / = Yg t - J , - 0 .

P t t Yn r= /+ j . 1 ,- dt = O. / 6 L + @. s- a I I d,\

-- o.32+)-.Pr", brr= /, -+/,=(o.zstoet)x

= o -J7Sx .

$': ber=-?1.*1,:(Osrr- o_2 s))_

-= O-/2sx.

51

Page 37: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

P. g- ze Fo, Zo- ZS ( ' - f I ) : / .5.20

y , : * f ,_0 .667

/ h - re?u i re4 f lo r145, [ i2 .4 s ]u 5 c<1u i#a_nce-s a re

bi,: -4,: tt- : I /.e.The- /occtf ioo*rf p-irt l t 1* and Q'are-ncLl J;&-nt

ly'le- hove t 4'= o. 4c4 ^. ^,..,J 2i- O. o 7.4,t,Ti, e-r e a.re no c6ong,u" in 1$- /acs*'o,rs aty'$e s{ubt,

d , ' : J , : O, o - , -J 4 r ' : J , : o .324 L .

t r!J_ G iv.,', ' ?

7s (n) , ,S : 2.4V^in of o. z ? i (,n) atn cl t. 2 3 g (,-) f.o,-, /oJ.

-A . :2 x ( t z 3 e -d . 3 j s ) = L so ( - ) .@. t(,0) Fi"s i V-,n a-t +# : c. i s4x

hrom luod .&- - L/se a- Srr','+h cAa.rt.

/ D"aw a, cen{ered ci"c/e (4oshea)" 'throug,A S =2-4 poini.

2- Loca,{e point Q {or 2, {ro,nY,;^ (po,nlon e x{reme. /e{t ) o- lg 4x (c/ock*'i 'e.)' loworJ 1$< /aa.d. L= t .31- j 6.?S .

a ) a - + r -*/ ./.1: -/5 z"* 1o4.3 - jrz.s (jL)3. Lccxl. 4A. drao,.lr|.o/, o/fosi.t<-

p o t.'nt P^ 4o {,.n j lt : 0. ai g t j O.}4.

/2 .o.4 o.04+^- aJ l ta inr Q' .4- L(s.'fh" Snrith chs.rf q-s 6(n a&nithne cha.r* anJ T|nJ

+he- inlec-:ecl|on o( ah.l1l-c-ir<(e wi+h tL,e- g=t circleo-+ P,t /B= ' t + jOtz. R"cJ 0-/60;- q{

G,D Loca.i ion qF =4.'b O:or:r*&f-

"effr i-O.076\-o./73(h).5' h or I - <:t' r cuile 4 slu L / e. ng/ h 1a g r' v.- be=- o. ?z : / = o.3 izx- o. 29,-

=O. /)2A--O.23C6,)

70

I' I Compctred fo

V ) P " o b i ' e n , P s - 2 t

t -

Page 38: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

----I

IItt

I

'\,

P. g-Zg Llte Smith chqr'f ar a.r ' t irvp<.da.ace. cha-rf .

,S'-rr.e conrt 'ruel ion q-s thql )o pro-6/em pg-2g, e.xcept point

Psc wou/d be.al lhe. exlrerne- /e,ft (mor/<<J 5y o ,) o' ' .(

I ' h - S : / c i r c l e becomes 4 r= / C l r c - / e - .

P , t 2 "= (2s+ j ze> / so = 0 .9 + j 0 .5 .

T wo ryoss i b la 5 af c tTJctns :

At Pr ' zsr - t+ i t .---+ cl3 - (O. t(Z x_ O. ogf).) : e. o7+ . .

At P" t zs t= / - i / '- - -+ d r : (O . lSg , r - -O .OCg^ )= O .29o) . .

k ^ci. ieve a. rno-fch \,vi+h - Seriee s{ub h<-uing

^ / 354: it Ro , w< n"ed a ncrrna.Jized s{<tA reoe{a-nce-

-)# -- -2'/.213 $er so{e&;ln c.orrzspa,iing lo Pr. Fronl

5p,ifh chor-f ,.ve tn4 *he- re-oui.e-Jsfub (*5*h

/ r=o ' 347^ ,

5;r ;/<r-, ly dor' -so(q1ioo @r.e-spon4,'ry 12 P^, d 5*u/krryth

rxith o.-no.rnaliza4 fea.lon.e- -S'/.43 is nee.Je4rwh;-$

c " fu ) re t a - s lu$ / " ->g th . / r= o ' / s i ' \ .

7t

,lt

)

J(m).

;^-

30i.

Page 39: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

q? a= at

I

,, tx l!

z

,D. q - / ' We- c,se- f7". (q-;+t

respec f i ve ly For c t ) r , 7

(ur/u)

I

eb^ *s: q

Wa r tg u i de.s a nc i ,Qeso, ' ,a lo , 's

crnJ ( f -s?) - fo . Zru anJ Zrc:1o : / 2o " t ( r ) - - 377 1 l L )

a) The narrha/rzed w€\ve

/'ft P. Ja nces- ct re y/ o#e.t

c<s skcwrn.r \ / - rT r tb ) oTM= t t o l '

t - - / '

'7 4r- kT€

/ t f : r . , f" , /@ --4,117.

Zr r : o ,4 /7 r lo : lgZ (9) ,

Lre= =hT - gol (g).

At f =2.1f. , /ryf :r/,4*.J- o.s?/.Zr. : o sq| ,?o:3J<&). 2r r= #:+23 GL.) .

P o-Z F.orn €7 ("t-tg), F = k/ r- c7' : #/ t -1*;'.(^) ta= -p ( r-G,/tf

I r -:42;:uJ/-(+)'(h\ ' * ( - f , \ ' : t\ . , ( , /

. \ f Iw h i.6 i,t <1, col.s t'o-f +4eg raph of (u"/"<") ploaad versus(*" - /+) )s a- 'un i* l i rc le .

a) uj

1/F

n/J)

7;

Page 40: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

b)

QA)

ie: 2n

T (j) ,t/ - (tJ;r2 n p t

zAtrI - / t :

'

v r - (f./tf

i Zre

\ ve -

#e.l

A

O",,' 1r4,

(e).

lL)

t / /a \ /9g-r ic le. r 'n Ft ra . V-

aycra-Jion f-r Ult) '

d )

b)

e )

P 9-3 Fo, TF vtt<vzs

|roph shewn an fh.-/<Fr.

) At I /f" = t-2e,u, /" t : 0.6a, )g/x = / .62,

u , /u t . : / . (7 .

e-/vvec+: in(;n ite- p <cr^ al I e./ - p I a-)e.

) txe- -sqlve +Ae Fo//o,*rh3

. l 'Af l l t* h-Hlry):o,d y ' ' i

with H"(y, i l = f l lct)?7 foupJoT con./ i+, 'o-.s lo

be :q. l is l i <J n/ th* conJq.h ' "5 p/^ /<s a-J-e :

dH!rv)fr

= o a-{ y-o anJ / :b.

Prop{ 5e/u/ron, H: V) - Bn ,"' (ry) ; h = T, tt-12,3;,.

fro,-, f7.(7-24), f"- # =

#Fror-, TE, moJs, n=/, (f,)rrr- #

Inslo-n/at+?-.,ur; fic-lJ expre->siun.s &rr TE, rntQa,

ko1v, z; t.) = 8, .o, (H cos (a)t-fiz',, F, = ̂ F@

K, (y, Ljr) -- ff s, s in ( ni9 s in (q1q -f,r)

E* (y,z;t)-- # P, sin (#) s;. (*t-f,z).

7s

(, / f")

Page 41: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

P?- t_ Pa , r i s (a ) c+oc l Cb)-s)mi/s-r 1o Prcb/e^ P. 7^3a.) Phut" exp.esrions .4r d'e./J conpsnert*s o{ fe modes,

l"(y, z) : Bn c"t {:"rz) " tf"L

,^,i " - &h< / / -(+) ' ' n= / ,2 3' ' " '

!J, (v, z) : .j.* Bn ;in (!#) n- i/"".

t* (y, .> - iff Bn s in (T) e-if,',

b) F,-o,n f7 ( t -26), hn: #c ) S u , { a c e c u r e . f f s . 6 5 l t i e s ; f , :

Cn low., p lefe: Jr l : a,-x f r@)

0n upper p la re , 1 - : - rx t tC t )

Pq- ; o- )

Enx i ,-"€ r

= i* 8, a jf"".

= dr 1-rf "8,€ if"o! r a t .

- l J s t 1 4 r n o o a \\ - I s l * . n c v e n .

L " - : 2 o , : ? x Q . o 2 e : a , O S G ? ) .

( q - z c ) q n J ( q - 3 t ) : ( * ) ' : 1 2 7 L, ^3 / 7 - t ,

^* #;, to1= !:ii i;r*,9b) LJs= Smith chart. )n",* l r l - #- j . , - . bfhrougl> s=2 Fiot.

,Sh,l+;ry \ 1o*va,J fo*d /.,y #: o.trl+

p/<".s ?"i"t & /,nrr. (/te boy' fu.5-o.tSilx,=o.3$l A g low.-d {L eg-r-rertr,

,L-_-,J 4-: o.qg + jort.

zr€ot- ff i = ##-t4761)-* / r= (Q-?q t 2o.at) x 511 - t44 + ilio <9) .

1"^r- lo (r- *) - 8. r7 (w),

74

A S : 2 x 2 . ' o 5 : 5 . 3 O k m ) .

fo. TE rc mode : f . :

Front {ct.

J:

*9-= J* l {= :5d/o1 (Hz) .2 a . 2 x o . 9 2 5

c-)

Page 42: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

- )

Hz)L

t.

f

0.6ilr,

Pq'6 TM,, -uJe io a i r - { ; ( (eJ recr \ngu(ar \ ,vaveguic le

Oleral i ,-tg zt a-r3u/or {.t .71'/ency u:zrJ (re. Ff.?-1s):

a) E)tr ,y)= Eos;. ( f f : )s;^(T)

Jap+ing 4-o in [7 .s ( f - i r ) l l - ro1sh (?- r+) '

H)r*,y) = +# =ffP)Eusin(T)r",(uu ),

H| t,,fi : - # u; = - ff H Eo cos (X),;n (T),

Ef,t*,y)= - #,'#:-#El E4 co'f#) s;"ff).,

d ,.r,= - #,, # - *r@:, , ,, ,,ry) .., (!),,.*hu,. h,l = (+)'o (€-)' , f,:1/r^ty'e

- h). t/aria.lions

i n z -d i rec ,+ ion are deswr i6er / by the y ' ' c fo r , " t4 lz

b) Fro- 9.cr- zd, (4)r.,,: fi" - ;fTV,(x - i , ,=* - : -L=1 c'1Mtt (f.)r,,1,,

. ) - T ) - c '- = : : : e : - -' 3

F , , r ' t - ( f . / f ) ' { f ' - f . '

P q - l Rec fangu la r wavegu ide : Q ' : / ' 21Gm) , b :3 '4a ( cm) '

E7. (9 - as ): / ; 1 - 2t-\s/1nn_

,m

Mod"s wi*h lAe -rhorlesl A" ( S (cm) a're:

Mode TEto T E,^ T Eot TEt,f TM,

A kn) | 4 ,4 7.20 6.s0 5. ls

A - lo (<m)"t /he only ProPaga{ingmode is TErr.

A = 5 (crn)t fAe. p.opa,Safing mod"^s *re:

TEo , 7Ero , TEo t , TE4 , and TMt r -

T5-

a) Forb) For

IIII

I

IL

I

Page 43: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

Modes F&rr,n)

7En

7Eot, TEzo7 8,,, rH,,

7Eo,7M,tTMaz

I

P.q-s

? q-q

= #F(^,n).

b) a: b, F(^,r2 =JT6.e) a:2b, F(m,n1=/ffi

2

J?4

Jii,l2o

. f - S x toa (Hz) , x- r / f -o . f (m).

Lc.f a.=kb , t (kcz. ( f , )^,= 4\m,.(r ', L lt tot\ lJrr= ff hr fhe dominanl TEroaodc .

t -o r f > t2 ( f ) tu . ' a>o .o6(m) .

Thc ncrf h;ghe r-ordcr aodc is TEo, wlsh Cl,>rf Y.f r , f <o .g ( f )o t : b<o .o4h) .We cAus. a= G.S (cm) and b = 3.9 (cm).

u. - $.a - 4.To x lat Ca/) ,r { t -(Nzaf- . txs-

mEff.= o.ts7 (r,) = fS.7 (cm1,

F: + = 4o.l (rad/m) t

' n

(zrr\o- mt'- 5?o (fr) -

a)

b)

76

7E,r ,Tt4r , | ,12TEor ,TEro | 2

Page 44: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

-l--III

/

[ *

Pq- to Q iven : d = 2.Sx lo'2 (m), L =f.st lo'2(t^), f '7. s , toe (Ht).

a) -r . - f :#-o.o4(m),

4=rlm =o.Go, .\S - ^ /F , - o .0667 0 r r ) o 6 .67 ( cm) ,

F = Zn/xr= Q 4.2 (rad/n),

uf "/E

' ,l' lot (r'/il,

\= c '1 ' l ' t x lot (m/s) '

(Zrr)n= , lo/ i :2oott = 629 ULl.

#.b

b) X=?-b-o.o233 (m),

Fr'=@ =o'g2e ,^S - ^'/F, - o.ot+3 (m) = 3.13 (cm,,

F'e 2n/^; = f93.2 (rad/m),

' i= u/6 ' 2 '57 r la t ( m /s) ,

ij = t '4.= t'?s t lot (rn/s) ,

(Zrr).= h-323

(tL).

P 9 - I t Par* G-) Ao.s been cJone

i l Llse- E7, ( t- t t) *o { in4 th"a lonq /he wo.ve2eta is .

in frob)em P. g'6, parl h).

av?+d.le Po\^/er I ransmi*fed

P 9 ' tz +) Er{*,Y,2;)=fosin (toonx)s;tt(/oory) cos(2np'or -f z)

Eos;n(4) t;r(f, i co' (2ro'orfz)-

M od" d ope rof ian : T M, t4 : 2nf : Zzr /oa (rad/s).

77

-"i

. j

Page 45: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

- l / , - \ 7 , a - , , / - - . . - - - -b) ('.!.),, = ?J (tl'*(4)' : +/ ##: i .+ g x ic, ( l {") .

F : ,4/'-Gii 7. G-zz) ( Zr*,),

: #[t -H"I: /// (raa/ra).

P 9-. : TE qode in C.o25Gn)xo.02t( t ' . - , , t ct i r - { ; t / . r /^s7.rar?

W. : \ \ /egU ide :Hrr4/.,2; t) - h,s <,tr(#) ror,lfx)ros (at_f z)

cL: ry : 8o?r : #,, -':::"n:::)cos (d+ -2goz)

--+ TEo, rno-le.

b) Fro,..n {f - ( 7-< s) :(f;0"='

? * =

* -

#- /. 2 x Toto (H,) = t z (gll").

Fl.om E7.c?-3s): P:?,F@ - Z*,ffi:.

f : J74'14 = - /. Y,t ta''elo)7 t ^ 2 - a

: / 7 ( & H ) ,

Zru= ffi: J#.-Sdd(tL),

' / \q113/'

A! : x/C@T : c/yuQ@ : 2.24 x ri t 7,o7 : 2. 2 4 (co,).

c) p, =+fbfbl+f r - . r . .=afpn'Ht fb-v 't ro.v = T )o Jo trrex 4Y

4 zr" Jo -;o'(ffx) Jx

: (zrr).,ab ui (+,) _ zgo (W).4z tx \2 ' /

78

?, F€l :3zZy/,--r '

37zxo . ' i 3 -Zoo( ! , ) .

3 x / c "f f i ; ;

: O.0566 (^)=s.ss(.^)

Page 46: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

(fQre

e")

,o

)

'cm).

o

j_

P 7- /4a-)

Subst i lu t ing E7 G-fz) , ' , 9 . (7-24) ;

- r vv,'(-)*,) -h'f''": i r[a7-n'{, - irlq (rrV, -h)-'

l''"x i/r '*n, {,-

'T'o @7.-h')-'t

Fro- f7.G-ze), @r: aJFr@.

f te i "e , y=d4ni f ,

wi rh 4 . -Qf1 . r | = %4

rr) j=T'/z@*r

A/' f - + t (o1 (fu), TEro E '/hz on/y />raf c,-e*fi-\s,rna4e ,^tAic/> 6o.t q eu{c>t$ fr*/u.n.7 #

(f.)rr,o: # : # : ta';'g.1{# -- 3x roe G{-).Th-r, d4= }ffi : o.oo?e (ny/d- ooz4 (+8D.

P.q-rs (f.)*n= ilffia') (f),o-

* ' t' \i"aie = 1x /o1 (H): 6 (Qu).

Ncxt higA.t moJe: b -42id b ' = 4 5 O a b=0.79a

(f)or #(f.)t,= *i/,.GftyJro= t

24

>1.7

@| 3.+

@

(tto

t L

Llsa6 lez b q,J,n;e+h is o,8.9 ,| |L o.a9x12 0.6 l8

*oa / . / f , 1 :6 .9 (eH) loz l o .L / o .L e .a (61 ' t z )

P+rerisril/o lanJsi4tz* 3.t(ard 3.rlatl) xfjiS

b) Fro^ t7.G-toD, pa,- I,rgr-2t.3+(*).

+ Pou: 9. j (w) &r b-o.ze a, and to .Z f tD {or b -o.Soe.

71

CGHz)

( *(+)(Gtlz)

Page 47: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

e _ = O . A g k n ) , b

{ '^- .: /. g x los F(n,-,f),t ^ n ?

E ryrf /o-r" . / -6r der t4oJet

: O, O6 (m), d = O. QS (n).

f(n, x, f ) - too/ (7)'. (?S',(gy .a rtJ /f>e., 'r re tonanf f.e9uen.,i.r,

P. q*;z

W:: I F (m,n,P) f -n* ;n (&Hz)

TM: to I :o .g3 3 . / zgT € r o t 23.5s 3.57sT E r t t 26 .o3 3. no,

jE ' , r , TMr , , 28. ss 1t- 3tLT t4yo 3c . og + Ea7T Eer t .3 2. 02 4. gozT Mtzc | -? 9. 60 9 .3 40

cx ) S ince d >a ->b . , *he /owes f -o rc {e . r t ?son46 ff t iode is 7€ro, r - rode.

r - e F - - artot - T/ ;r, 4 - 1. Bo, x rg, ( 11)= l.Yoz' (g.F{z).

b) ,:ram E7 (e-/2o):

D : v {,o, ,/ ' to o-bd (a} +41)*tot- P-rf2@

- , f f iW a.64(a. '+ d ' )

: 6 '861.

From E7t.G- /(4) e.nd (g-rrs):

W" - *roFo' -t I

o f,:, H: : o. 07z3 x t6tz g7S= o.ozztet),w^- fr ob4 (# * r) Hi - 0.o773 (f ;r) -we .

IIIII

II

Il-IIIIJ_--

80

Page 48: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

P. g - /s

P q-te

a)

A )

c)

1 r :2 ' 5 .

r - t * l t l: -) t / t L { a, 4t

n : l ( n \w(oJ (€r) ' /a\"tot/go

W_ (W)ru: o.

ta '. | : :

v { T f t o t l o q

: t

( f , , , )g: 3.r 32 (Gtaz).

= 5 ,162 .

oz73 (pr)= W^.

r : s l = - ar (o t Z la :

- , /Va -

t

a') 4,-* - +Jn"/m :6.soo

/ q, s oo (21'/+ - /a+ a - - O . o 2 g q G n ) - 2 . 9 q ( c m ) .

b) f*, - &

: 7. j+ (qU") .c ) For copper , 6 -5 . to^ /o7 G/n ) .

Q,o, o G .To.,- 6,s ool 'r i i - 12,443 .

P. 9-zo n ,[ffi"r a-bd (at+ d')*{o{ -

a) For a . -c ! : t . sb - o .o31 f ^ ) , b -o .o2 (m) .

i ,o,= +{{ry - t .r7q,toe(L)-s.sqxto1 (Hz)

Qto t - 4o .zz , /VF - l l ,O l g .

b) Fo, Q'rn- l .2o Qrct --r 6'- l .zo2b : /-44 s o. oL- O-o2ss (ft) = 2.g? (crr.).

o

g l

Page 49: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

WAntenna .s a .nd An tenna- A . .ays

From EV. (/o- /z) a:-rd Qo-/4) :

a- ,9, 6) - 4n8t ?o-L T g t r ! 1

P. to- t

b)

P /o-z a)

t l

Mqximum E, of 4, occur at €- n/r .

o - DP, - Eo' .'j aw 4 zAt ,r?o

, 7 - 2 - > ? o D P .

1 1 - / F ^- o Z 1 T Z , ; D : 1 ' 5 , I

- -+ Eo- o :ogzz (v / - ) - 9r .zHo: # : O.Zsg Q, .A/m) .

a o

^ - U^o,"_T

frIuao

- o,/ox /E x /o3 (w|

(n v /^).

l .- J , ' f ^ t

2 - i , K r '

---* -a_ 2 P,Kr -T :

-i

Uno* - 50 .

T-rc.zcstl.

#L"[o{r,n'n cosgsine de d4

= 2.6s ( tu/s , ) .

- - " r> D=#=lg '95, or l2 '7 'GD.

L{.^t: +P, :4n Uon- 4?rx2 .4 , -33 -3

g2

Page 50: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

.P. /o' I fq.ra*ion/

- Q) t -

P ro-4

t 1 / . f L

tsowe-r losf , fL:

Conf inu i t y : V -J : ' j -_e. l 7 t - \-T'

^ 7 o+ F : = - : S t n 2 7 T Z

1 c

d;pole.

g3

of

j_(A

^) Z (z) - Io cos zarz

F=+:271 Lt/ovelenS th z, - | Crri..

/2) i rz) - zo ( , - *t zt) + f": t:lH 2i'"'.oo

a )

6)

w).

^: #:3oo(n), *- #- j ; . . t (41../z;on J;polr).pod;oh;on re^sishnu, Pr: f ,orr2(*) ' : tgz (n).

Eq.( io-3o), 4: , f f -W :2.6tx t ;4 l .s} .E re-( to '2?), PL-

| . (#) : o.r r , (e) * \ , : &-gs.s%.

E7.(to-zey: P, = r'(d!)'- ^' )

87. (ro-,o7' 1r;;*!$e;'${i * lt'l"-"'- *{*"= tq (^v/n)'

rr (t?)=?f r_j'1 : S. o /, /.6, 6D.l .17 t rc"

-?:#-3(-).Di p olt bngf h : /- l Cm)* 2, - 73. | (sD.

c)

I+T

.:

h f '^+

(zoco'/z)zJz

#-6t/:: (AsLx rr= o e?s(F)(*')8,:7r.t (*).

.1i. t-il.:t'I

!1

Page 51: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

P, lo-e

P. /o- r

a.) Ee -,i W /fT'( r - #S eir'co'e dz

- .m c'jf| Frs) ,un'i -

fu"-jP"FG),FG) = s;ne[t-ct!(tt gasdJ .

In case f hr r , , cos( fhcosl )a t - { ( fhcost ) ' , an4

Ftcl * *(t ' 's;n e'E, = # oile 6 ptsine) ='ry r"4-iVa sin e,Ho - * r-ifa g fh sino) -

i#trttlA sin e.b) P, - *{T"r ri r'siae dad{ = $ [nrr,(+),J,

R,= P,/(*i l = Zan'(*) ' 'c), =

ffi * qh:rc + raloe o-t.o@s1.

l : /eo x bt ( H) _>^: ?: #

: 1 ,647 ( ,n) .

h: 4O (m).<<)- ,,^tilh /riarrgctlay, cu.rcnf distribuf,bn.

a-) /r,-o'-t P-oLle,n .P; /0-6, tse ha-we , ( fg= +)

l l" l^,^r7 -*ro- ff i ^ioo: r.rr(av/^).

b) P,

lH+l^or: f ItJ^^,- ff: 7, s I x /o-'(A/d= 7st(y,</^).

: +I"" I;": zntsine Je - $rf^'"tl*2;"?ede- # (f rq' (i) = s(f h z)-: ! l+'"'GI l

= ryx +ori (#V)': , , t36.s(w)= r. r+ (2w).

, ) 2r= Zp,,/ t i = o-227 (f t) .

r4

Page 52: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

-v

P 'to- g - l F t4) L ' P(one pa f te rn {unc t ion {o r } f e r4o 'o ,nclipole is , from E7. ( /o- rd,

F^( e) = -s in €.

Mo*. Etu) : { at €o - ?o"

T; _' : :': ;' :7,"i,, : F- ( 4) =*

-+ Be -a ,nw i4+h A€ : O r -0 , -?oo, \6) t -plane pay' lern {un.h'on hr ho?-wz,ve 4ipo/e-

i t , f rom €7. (ro-sr),

F^rc)- cos{(v/?)coseJb\v.

- ---7^ a

lVlo" 6 (6,)- I qt Oo=7c".

fb. I I ^ P otars, Ooiofs al

-+ B"oavv id th A0 '=

P. lo- to Ltse E7. (to-27):

f5(€,'):$ {ei) =t .0r'- ei- / 27"- S/"- 7gi

).

85

F(e) - cos(fAcos.e)- cos.PAS r n O

For 2h : / . 25A- ,

l f fe>l - lcos (r.zsn cosel - cos (r.zsi l |t r r ? r l - t f l

lU;a+h af mainb.a,n Ae{*.rnthc- .first nulls= 2 x 5 3 . / 3 ' = t O 6 . 2 6 " .

i.i-:rf

*-_rj-..{:l,l

Page 53: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

P io-r t Use 87. ( /o- to) for Her lz ian d ipo/<s.

- a : E, rc) ' t E,@): ; i ( zh )- #1/'i,r(#_#)

-rAo _ _"-j|r'

I t l ^ - / n n ILn (be far zor1e, P- ; R- <l cos O.

a-) Ee= t# 7o p sine A/2' (l * la'f 4coseS

= +Prf ,iPrc-lcosdF(il,

where F{e) = sin€ cos ($ro, e).

5.1 4 =)./z ,

lF@l - ls ; n e c o s (! c os gl.

: ) d= : . ,

lf?Sl -ls, ne cos grr eo, il1.

86

Page 54: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

p/o- /L

P. /o- tE

o)b)

/ ior an a.rray o{ i .Jenlica/ e/ernenls sf a.e4 .<

c/r'-tf aoce c/ c\pc<rf , we 6ovu, {rom Ff . (/o-g+),

It i : # tFc1t)l l*, *1, ;eo

\vhe- rc ( - - fJ s ingcos /+ f .

In lhe H-p/or. aF a. d;po/e , e : r/z , F (!, 4): /<t-) J=4,9-+'

I,q, oil -- i, +i=1, * lI t,,.- +)ll ., \ r 1 z \ , - n 'D t a = ? , ? : : '

. . t | , n n . + t r llA@) l = lcos( f fcos( + t ) l .

IJatt

Five - elemenf broadsi{e- |inomia.la-rray.

P.otaf ivc cxci la* ion ampl ihtdes: f :4:6:4:1.

I r ra,y {acfar : /A e | - | cos(!c." g)11

c; cos(*cot{)=QV). ' /o

€ g = 7q.c6".

Hal{-power f,eamwiJ+/1=2 (go'-74.96'): jO.29..

For uai{orm a"?4v , {ro^ Eo.(tt-Eil :l l sn (Fcu l l ( ' '

r .TtWSi -E- i '7*3t '

Half -po*c, beo^wid+h {oc S-alct*rr{ llnifonne*AwitA 4a tpact 'r! = 2(go,-7E.6t.) - 2O.78..

g7

Page 55: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

P to^ lq 7ne n< Trna./;zc4 a.rra.y SacaaT at iAe{;u._e/<r'ter# ra.pzre-J arrqy 1j

iAc^.ili = + I / * zei!+3 J2** z {'3* + e;+{!

- t l ";,*

[z + z, ei i + { iu) -, (" i '*+ ;;"*)Jl:

+ l 3 + 4 c .os, l t + L cc, z{ Icraph tF V<"fSl r" . ! i t shown befow cntAe./e.Sr.

-n -n / t

Fot b roaJt ide- ,opr ro f fon: g : O , . ,J , =

f d .o"+=1rcos$.

l ' i ( i l1 = + lz + + cos(v cos d) + 2 cos(2 j r cas +)1.

T'hrs is 2lot+ed a6aue- om +he rlgh+ . TAe {i .rt siJe,/o,1c,{e.,rel| t 0.// ,

"" .b(ugr{//o. l t) = /r.2 (dE) a,awr, {.o* fhe mo,.n_bea.m

rq d/a-1|on . Th is < o"r,p<l-rz, ,.vft6 O.--, or y'? (d B) Cown frr r1he

.ive-- . /err ' ,en-( qnf#rn broa-ri=, 'Je- o.r.a7 shown ,h t] ,g./O-l/.P. ' l t - /5 F,o* -Qr . ( to-3?) and ( /o-6d :

llol: ry e'jtp l"'t3,7, A,H;)Ay6t)l

T )

where A*(U):; !ff i,A (*\: t d!z*hL.. , / , t y t

N2 s i n (79V5 ,

, l i - $*t ino casf ;, D )

7t : i;' sine cosdt v -

t

l r G,6t l = INtNz I serq,"'d1 si " (#). s ;" (4b) | .L sine J sin(f , t3;"(g I

8g

o

I

It/r.

1371/z

Page 56: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

-r

P to- ta-h

a-) / l ertzi^n dipole ofJ,(z) *- Z@1 ,

, S dt/+/" =

J_orr" cos f

z dz -

l? to - t t A-

l '{^/f - w^\/e dipole wir| srhcts6,1'q/q/ cqrrenf ch'strr!>qhbn

Z(z) : J (s) s.r ' . f ( | - lz l)

- J(o) cos fz.

r 1 1 ) - + r ' r

\ fT=t)

Frorn E7 (/o- (g) and P.ob/.,n P. /o- /6 6) , l.= #.f rom €V. (to-s€), vve hono,{ar 0 = 17/2,

1 : + r' @) P, n r@7ry-F =z+,,u,).lE,l= ###: 2-?6 (v/m)

l4"l= le,LI: 2.?6 x $ = o,v4z u).

/eng*h c//.

t-!at, s;^(rs#l= f +.&.

b) l/a-/f - uvave 4,'p.o/e- ,uith h = L/4 ctncl J.rz):r(o) cos pz.rx/4

/ . = f - - ' =co ,pzJz : * s t r o ) t - 2 ^- '_^ . / , - - f - - - -

,B - '^ \ fT) : p

- ?r

c) l lo l { -wo' . te dipo/e ,y i th A:/ /+ anJ a(z)=r(D(t-4t21/r) .r A/4

t": [:;* ( ,- +tzt/x) Jz = ,I^'*r,t - +z/,t)d, : t .

t-#='t (m)

l.- h/' r<z) dz .

Fo, rnolched loal,P: V: : o '7+i '' L gR , gx?3 .1

a)

b)

= /. s a x lo ?(w) = /.52 Qnw).

II

s7

Page 57: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

P to- rs , q . (io-sd' pt_: ##r,

f : / fe(m), Pr :2x(o3( t* r ) , ^ : - f =##: /h) .

c ' ) P a r a / / e / h a . l f - t A . / a w e J i p o / e r ; 4 : D r = / , 6 4

Pr: ff i f f i{,2,/oj: /.s/4 x /c: / . 5 / 4 ( * ,

b ) Pora / re l l {e - r l z ian d ipo les : D , : Dz : / . - tO

P, = / - s t4 - (#) ' : / - 267 (mw).

P. /o- rq .Froq E1s. (/o- /z) ancl (to- t+):

G_: 1nU(e , r . i l _ 4 t rR 'F" ,V ' D D D' r . r

l l . r1-; ' in! t q". (/o - 40) an d (/o- 12,), r( - - l c r l : r / ^ i : cs (4cosdfz .) D r ' ' . , - t ' O . f I_

L s i o ) I

- :' (w)'"v)

,h.Q:

a ) Su,6si i i 'q f ins @ / 'n €Z ( to-7s\ ,

l"re): #ecel= o./3*

Occ<trs af O

c) M o-r. yo. lu e o*

b) M ox. vo-lue o.F A"(e) for .f : /O* (H),

f cos(*co'dlzL st.'d -l

A"(g): o. /3x. / -sz =o.2i c* ' ) ,wL; ct, i5.--rr,,1 o.lfor ,%on A.e)&r f =, /o{ft1)becorts- 4re vva.yelergth is shar{er a! if :J/ rcPpz).

?o

>": f :3 (a)

='T' Arq-o./3* = /.r i (m").

Ak) frr .f : 2x /o?(+b), L: /.9 (a),

Page 58: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

P. /o-zo A, . t+ennq ga in : /o IogroQ2, : 2o (c B)- GD: /oo '

,f-a) Fo ^/er

d T -" r

P /o- z l

3^ loq(Hz) - :f:3':/-/fi- O. / (m).

{en-, ily a.1 ra-ryef1 - ilu e"

FIr: #ffi:o.ot4r (w./*')

U

b) Power fnlercepi"d Ly large/ = {urf, = /Sx o. O/4? - O.224 (0.

c )Scu t (e red 1 )o rn r t r 4ens i t y ay ' radq . r e .n f enna

Y,= #- Zff i- 2.7rrro-'o (w)Ref /ected po,,ye.r aAsor.be4 by anlennct : 4 A"

= 2./ex to-h (fi c): 2./rx to-'(#, roo) =zzir ' /i" (w)

Er - / o .o /47x2Y377 = 3 .39 (u / ^ ) .

= tz . t ( fD.[ar t 'h rqd i . ts -6 ,39o (k , - ) .

Al.(; lu./" of geosyncAronous sq./elhles - 3 6, f Ao ( L.,)

Qecs yneh"aus orbit raJiu' = 4,lgo+g4roo

t . - t / 6 . sso . : 44 (so ( kn ) '

Y - s , n ' (W iT )=8 .561

{ - 7o ' - { .s6" - g t , *4"

a) Two sqlelllfes cover only 2r(2f)-):.e"< i40:

U"u /hr"e se.lzlfites io eTuqforia(

p(o-ne, 3x (z{ 'S = 4 8?o> 3 60?

Po/or rggioas are naf avared Ae-.aqse

b) L.t Pr- Poru., fcaasmi(lcd ly sa-/e/li.t:e- enlennq-'9'<qoi

f l= Po*., densily wilA;a t 'Ae eo.!1€ =# ef ,uo of cone, <ap on earth - l: lU r Lsin o 4e d+

- 27/ r' (/ - cot *) : Zn r'(t'/D- 1f (F{):

ql

:l

$.i.{

,iJ

1

i

Page 59: Engineering Electromagnetics-cheng-solutions-ch6 7 8-9-10 1795

P lo-zz a) fr.n fq. (/o-so> 'p - ( 4 r r ) ' p' *

e -er t i 'L '

where lAe sqbsi . .7r '1)4s e can{ s Je+rofe €ar fh o- ,J

9q.te /l i ' le resP e c* i v e ly.

) - - . -* e - / 4 x ' l O ? - Z . / 4 x / d " , - ) ,

- 3. i6 , ,/Os;Q-: / o(e'/to)

e" : lo ( t r / td - 3 . t6 x lo t .

r - 3 .6s x to7 0n) , P r - 8 x |d t " (w) .

--* Pt - 2.1 (@.

b) F:-om [7 Go-rys , P, - q (ff)'e.A.- f ie-:% xs.t6xto,

- I | .9 .fint).

, ) : f r | z . t t r to 'L i 3 . !s ' r ,o t ' t \ t , O.g x ld :L' t 2E \ ' t r , s /- { ,5+ * tc t2 (w) = / .51 ( iw) -

x"- j# - 2.go x tdz e",

q2

x l o j