Over on his blog Akos has uploaded several new posts all relating to ADS-B reception. His first post shows how to build a very simple yet effective “Coketenna” ADS-B antenna which can be built with an empty coke can and some coax cable. This antenna is essentially a 1/4 wave ground plane antenna with the ground plane being a coke can cut in half and mounted upside down. The whip sticking up is simply the coax inner wire. In his post Akos shows exactly how to construct one.
In his second post Akos offers some advice on mounting and positioning ADS-B antennas, discusses the ‘range myth’, talks a bit about LNA’s and filters and shows the differences between a stock RTL-SDR dongle, and one optimized for ADS-B reception like a FlightAware Protstick.
In his third post Akos shows his results from long term ADS-B reception comparisons between a generic RTL-SDR dongle, an RTL-SDR.com V3 dongle with 1090 MHz LNA powered by bias tee, a FlightAware Prostick and a FlightAware Prostick Plus. The V3 dongle with bias tee powered LNA is used as the benchmark receiver and the results show that it received the most signals. The next best was the Prostick Plus, followed by the Prostick and finally the generic dongle.