Four-channel, all-frequency, GNSS RF-to-bits receiver for precision, satellite-based positioning

May 23, 2019

Project update 10 of 17

The RA1 Antenna Lab Testing

Hello to Everyone!

In an earlier update we showed you the test results in the field, today we will talk about how it happens in the laboratory. Amungo RF testing workplace is on photo below. The partially assembled RA1 antenna is also here.

Workplace and RA1

The tests include checking the parameters of the VSWR, frequency response, phase. We need to carefully check amplitude and phase balances of four feed points. It have to be low to provide good antenna axial ration. We also tested feed points matching to reach better antenna gain and so providing good system Noise Floor.

The frequency responses of all four feeds
Phase four-feed patch antenna
Smith chart and VSWR

After all the parameters have been checked and we are satisfied with them, the final assembly of the antenna begins

The final assembly of the antenna

Then the RA1 antenna goes to field tests.

Simeon Voropaev,

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