Lee, K1VZI communicates with his friend hundreds of miles away through a satellite passing overhead. He gave me a demonstration of how it is done using mapping software and automatic positioning directional antennas. This contact was done in CW mode (Morse code) transmitting on 70cm and receiving on 2m. Notice the frequency shift with dopplar effect and the need to constantly adjust the dials as the satellite is zooming overhead!
A corner reflector antenna is a type of directional antenna used at VHF and UHF frequencies.It was invented by John D. Kraus in 1938. It consists of a dipole driven element mounted in... Read more
Gordon West (WB6NOA) talks about HF mobile antennas, and getting the feed-point impedance at 50 Ohms. Also covered, is a recommendation on the type of antenna vehicle mounts to use, and thos... Read more