by Amungo Navigation

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

View all updates May 30, 2019

The RF SAW-filter Replacement to Provide GALILEO E6 Band Signal Reception

Hello Everyone!

Thanks to all who have been interested in our project. It is important for us to see people’s attention and feedfback. There is a motivation for further development.

Now we have RF SAW-filter in signal chain. But it does not cover the entire band of all GNSS systems. Current frequency response is below.

Not only the quality of the product, but also the possibility of reducing per unit costs has importance for us. Our goal is to replace expensive components and improve technical characteristics.

To date, we have been able to develop a passive filter to replace the SAW-filter in the input circuit.

We have tested the filter and obtained the following measurement:

  • Bandwidth 1107 - 1388 MHz
  • SWR across the bandwidth does not exceed 2
  • Passband loss – 2.5 dB.

The filter is designed on passive components. This way the total cost of the filter is reduced greatly and the characteristics fully conform to the requirements for the tract.

The graphs show that the filter we designed provides lower passband losses. The SAW-filter provides a loss in passband of 3.5-4.5 dB. The parameter of the new filter does not exceed 2.5 dB.

The initial modeling has been carried out in the AWR program. The developed topology has been transferred to the PCB board and additional configuration has been performed to improve the capability. The next step is trace of the filter on the NUT2NT + on PCB board.

The new revision of NUT2NT+ board will cover full RNSS band and particularly GALILEO E6 band and will improve system Noise Floor at cost of slightly wider passband width.

Daria Ianovskaia

Amungo Navigation

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of $15,000 goal

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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

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