How coax cable loss affects ADS-B reception

Over on YouTube user Adam Alicajic has uploaded a video showing how coax cable loss affects the frame rate when receiving ADS-B. To do this test Adam uses a precision attenuator in between his ADS-B antenna and RTL-SDR dongle to simulate attenuation from coax cable loss. His results show that for every 1 dB of attenuation the frame rate drops by about 10%.

Coax cable loss for common type of cable can be estimated with calculators available at http://www.net-comber.com/cable-loss.html and http://www.arrg.us/pages/Loss-Calc.htm. RG-6 cable has a low loss at 1090 MHz of about 0.23 – 0.32 dB per meter, whereas RG58 has a loss of about 0.5 – 0.6 dB per meter and RG174 (stock antenna cable on most RTL-SDR units) has a greater loss of about 1.2 dB per meter.

Coax length loss contribution to the bad ADS-B reception

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Related posts:

  1. Solving APRS Interference Issues with a Bandpass Filter and Coax Notches
  2. Measuring the return loss of the standard RTL-SDR whip antenna
  3. Coaxial Cable Loss
  4. RTL-SDR vs. AIRSPY on ADS-B Reception: Round 2
  5. ADS-B Front-End with LNA and SAW Filter for Improved Reception
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Gregory
#79088

it says nothing about if he has frequency corrected the dongles crystal offset. that may also contrbute

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Randaller
#79085

I have removed 7 meters coax extension cable and got ADSB reception improvement from 60 km to about 120 km distance.

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Samuel González
#79080

Hello, I am doing that same project with coax cable and I have not so good results.

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