8/17/2019 Lab3 Trautman

1/13

Lab 03 ReportAnthony Trautman

Spring ‘16

Antenna Theory

8/17/2019 Lab3 Trautman

2/13

Feedline Width

Calculate the resonant frequency of the antenna using TL model

Solving for f = 3.267 GHz

Width of feedline = 3mm

8/17/2019 Lab3 Trautman

3/13

Create substrate

8/17/2019 Lab3 Trautman

4/13

Create Patch Antenna

8/17/2019 Lab3 Trautman

5/13

Simulate Frequency Response

7.28 cm

8/17/2019 Lab3 Trautman

6/13

Simulate Frequency Response

8/17/2019 Lab3 Trautman

7/13

3D Gain Pattern at Resonance w/ params

Gain=5.7dBi

Radiates in z_hat

8/17/2019 Lab3 Trautman

8/13

New Feedline Width

Calculate the resonant frequency of the antenna using TL model

L=32.9 mm

W=1.9mm

8/17/2019 Lab3 Trautman

9/13

Create substrate

8/17/2019 Lab3 Trautman

10/13

Create Patch Antenna (4.3)

Feed strip

2.1x25 mm

Inset

13.6mm

8/17/2019 Lab3 Trautman

11/13

8/17/2019 Lab3 Trautman

12/13

3D Gain Pattern at Resonance w/ params (4.3)

8/17/2019 Lab3 Trautman

13/13

Vary the Dielectric Constant

Dielectric Constant Peak Gain -10dB Bandwidth Resonant Freq

4.3 5.64 ~100Mhz 2.095GHz

6 5.80 ~50MHz 1.786 GHz

10 5.24 n/a 1.394 GHz

Based on formula 14-4 above it is expected that the resonant frequency decreases when everything is held the

same. Peak Gain and -10dB bandwidth are changing because the patch antenna was not tuned to account for theshift in resonant frequency. I do not suspect the Gain or Bandwidth to change very much if it were tuned properly.