DescriptionThe AH-826 is a broadband, linearly polarized Standard Gain Horn Antenna, operating over the frequency range of 18 GHz to 26.5 GHz. It can be used as a receiving or transmitting antenna.

ConstructionThe AH-826 is designed to be extremely durable, making it an ideal choice for daily use in laboratory environments, both indoors and outdoors, and even under continuous exposure to extreme weather conditions. The antenna is constructed using high grade, corrosion resistant aluminum. The outer surface is also painted to provide additional protection. The antenna is fitted with a high quality SMA-type coaxial connector.

Com-Power Corporation 19121 El Toro Rd., Silverado, California 92676 (949) 459-9600 www.com-power.comRev. D10.15

ApplicationThe AH-826 Standard Gain Horn Antenna is suitable for use as an EMI test antenna for qualification-level regulatory compliance measurements (FCC, CE, MIL-STD-461, RTCA DO-160, FDA, SAE, etc.). The AH-826 is equally suitable for use as a transmitting antenna for establishing radiated RF fields for product immunity tests. It is capable of handling power levels up to 10 Watts with the waveguide to coaxial adapter in place. By removing the adapter and connecting directly, or with a length of waveguide to your amplifier’s waveguide output, field strengths of over 1,450 V/m @ 1 meter can be achieved with only 200 Watts input power. Another common application for the AH-826 is to use it as a “substitution antenna” for determining the Effective Radiated Power (ERP) and/or Effective Isotropic Radiated Power (EIRP) of intentional radiators (RF transmitters). These tests are typically applicable for products operating within licensed frequency bands, and also for European acceptance tests per ETSI standards for radio equipment.Notwithstanding the above, the AH-826 can also be used for site comparisons, shielding effectiveness tests of large enclosures, field monitoring, site surveys and other general purposes.

MountingThe AH-826 can easily be secured to any tripod or mast via its standard 1/4-inch x 20 mounting hole located in the center of the antenna’s base plate.

Features • Frequency Range

18 GHz to 26.5 GHz

• Transmit & Receive Capabilities emissions/immunity applications

• Individual Calibration Included per ANSI C63.5 with NIST traceability

• Three-year Standard Warranty

CalibrationEach antenna is individually calibrated per ANSI C63.5 with NIST traceability. The calibration data and certificate is provided. Recognized ISO 17025 accredited calibration is also available upon request.

Standard Gain Horn AntennaAH-826

(W1) 4.3" (H1) 3.4"

(D2)12.1”

X1 - Dimensions of horn waveguide/flange only (not including mounting structure)X2 - Dimensions of entire assembly (including mounting structure)

(H2) 5.9"

(D1)9.6”

(W2) 8.7"

Com-Power Corporation 19121 El Toro Rd., Silverado, California 92676 (949) 459-9600 www.com-power.comRev. D10.15

Specifications

All specifications are subject to change without notice. All values are typical, unless specified.

Typical Field Strength with 10W/200W Input

Product Name Standard Gain Horn Antenna

Frequency Range 18 GHz to 26.5 GHz

Polarization Linear

Nominal Impedance 50Ω

Power Handling (CW) 10W/200W [with/without] waveguide to coaxial adapter

Connector SMA (female)

Antenna Factor 31.1 to 33.6 (average: 32.4) [dB(m-1)]

Isotropic Gain 23.4 to 25.6 (average: 24.7) dBi

VSWR 1.07 to 1.65 (average: 1.40) :1

Return Loss 12.2 to 28.9 (average: 16.6) dB

Specifications FCC, CISPR, EN, ETSI, FAA, MIL-STD-461, SAE, etc.

Horn/Waveguide Dimensions 3.4” x 4.3” x 9.6” [8.6 x 10.9 x 24.5 cm]

Complete Assembly Dimensions 5.9” x 8.7” x 12.1” [15 x 22 x 30.8 cm]

Weight 1.5 lbs. [0.7 kg]

PAM-840A Preamplifier (18-40 GHz)

AT-812 Antenna Tripod

Also Available:AH-640 Horn Antenna (26.5-40 GHz)

AHA-118 Active Horn Antenna (1-18 GHz)AL-100, ALC-100, ALP-100 Log Periodic Antennas

Accessories availablefrom Com-Power:

AHA-840 Active Horn Antenna (18-40 GHz)

10

100

1000

10000

18 19 20 21 22 23 24 25 26 27Frequency (GHz)

Field

Str

engt

h (V

/m)

Ant. Input (W) * 30 * [numeric] Gain

Test Distance (m)Field Strength (V/m)

10W @ 3m10W @ 1m

200W @ 3m

200W @ 1m

Typical Forward Power Levels

0.0001

0.001

0.01

0.1

1

10

100

18 19 20 21 22 23 24 25 26 27

Frequency (GHz)

Forw

ard

Pow

er (W

atts

)

150 V/m @ 1m

200 V/m @ 1m

5 V/m @ 1m

20 V/m @ 1m

Field Strength (V/m)2 * Test Distance (m)2

30 * [numeric] Isotropic Antenna GainForward Power (Watts) =

VSWR/Return Loss

1

2

3

4

5

18 19 20 21 22 23 24 25 26 27Frequency (GHz)

VSW

R (x

:1)

0

10

20

30

40

Return Loss (dB)

Impedance/Phase

0

25

50

75

100

125

150

18 19 20 21 22 23 24 25 26 27

Frequency (GHz)

Impe

danc

e (Ω

)

-100

-75

-50

-25

0

25

50

Phase (degrees)

Antenna Factors / Isotropic Gain

20

25

30

35

40

45

50

18 19 20 21 22 23 24 25 26 27

Frequency (GHz)

Ante

nna F

acto

r [dB

(m-1

)]

5

10

15

20

25

30

35

Isotropic Gain (dBi)

-3 dB [Half-Power] Beamwidth

0

5

10

15

20

18 19 20 21 22 23 24 25 26 27

Frequency (GHz)

-3 d

B Be

amw

idth

(deg

rees

)

E-Plane

H-Plane

Standard Gain Horn AntennaAH-826

(H x W x D)