by Amungo Navigation

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

View all updates May 23, 2019

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,

Amungo Navigation

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Product Choices



An open, lowest cost Multi-Band Multi-system GNSS RF Front End.


RA1 Antenna

A stable phase center single L1 band antenna.


RA125 Antenna

A L1/L2/L5 multi-bands antenna.


Amungo Navigation

Amungo Navigation creates hardware for geo-location.

Igor Tcarik

Strategic management, design of antennas

Simeon Voropaev

Hardware design, manufacturing and testing

Sergey Speranskiy

PCB design

Ivan Makushkin

Software development, embedded and signal processing

Daria Ianovskaia

RF circuits design, RA antennas LNA and NUT2NT+ board's RF circuits

Dmitriy Bitsulya

Software engineering, C/C++ Developer, NUT2NT+ GNSS-SDR support

Ekaterina Kolomnikova

Hardware assembling

Nadezhda Bybko

Supply and fulfillment management

Vladimir Vikulin

FPGA Design and Verification Engineer, FAE

Artem Krivosheev

FPGA code design

Andrey Khazov

Metal parts design

See Also

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