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sharebrained / portapack-hackrf

Portability Add-On for the HackRF Software-Defined Radio.
GNU General Public License v2.0
975 stars 407 forks source link

SWR meter option possible? #148

Open DinBan opened 4 years ago

DinBan commented 4 years ago

Hello, is there any way to add to Portapack firmware SWR/VNA menu/option in future? I found that HackRF/SDR can be user as SWR meter with cheap noise source - https://www.rtl-sdr.com/measuring-the-swr-of-fpv-antennas-with-an-rtl-sdr/ https://www.rtl-sdr.com/rtl-sdr-tutorial-measuring-filter-characteristics-and-antenna-vswr-with-an-rtl-sdr-and-noise-source/ Also found on GitHub some hackrf_antenna_swr_utility - https://github.com/coddingtonbear/hackrf-antenna-swr-utility/tree/master/hackrf_antenna_swr_utility I think it would be nice and useful option if it possible. Thank you!

DinBan commented 4 years ago

Any answer? Hello?

jboone commented 4 years ago

I agree it would be useful. I only think an SWR meter is feasible. A VNA would require two HackRFs and some extensive hardware modifications.

For an SWR meter using a noise source, it sounds like what is needed is a baseline difference function on the spectrum display. A sweeping spectrum analyzer like what is done with hackrf_sweep would be useful to extend the frequency range of the analyzer beyond the 20MHz bandwidth of the baseband ADCs.