In attendance: Glenn and Andrew
Testing of version 2 Cylindrical Patch Antennas
We went to the PSU Microwave Lab in the FAB and tested all three CPAs that were built out in Nevada on the HP 8753E vector network analyzer (VNA). Here are the results.
Test of the 2.422 GHz CPA
- Opening up CPA has no effect as we thought.
- Patch is pretty impervious to metal around it.
- Corporate feed network is pretty sensitive; we see an increase in bandwidth but VSWR stays the same.
| -3dB point | 2.259 |
| Resonance | 2.293 (SWR = 1.07) |
| -3dB point | 2.327 |
- Wrapping a magazine around the antenna brouht F down 10MHz, SWR went from 1.05 to 1.2.
Polyester sweatshirt had no noticeable effect.
Using CPA_6, 2.293 GHz implies a dielectric constant of 1.279
Test of the 1.575 GHz CPA
| -3dB point | 1.505 |
| Resonance | 1.524 (SWR = 1.07) |
| -3dB point | 1.542 |
- Using CPA_6, 1.524 GHz implies Er = of 1.225
Test of the 1.277 GHz CPA
- Using CPA_6, 1.524 GHz implies Er = 1.209
Attachments: