Abstract: The acoustically excited antennas based on the piezo-electric effect (PE) have been shown to reduce the size of the long wave communication system transmitter (Tx) to 10 −4 of the wavelength ...

Santa Net is an annual December event where licensed amateur radio operators use RF and EchoLink technology to connect children with Santa Claus on the airwaves.

Amateur radio license exams typically have a question about the bandwidths taken up by various modulation types. The concept behind the question is pretty obvious — as guardians of the spectrum, ...

Abstract: The multi-frequency multipath observations of temporal variations in the Doppler spectra and signal amplitudes of HF radio waves reflected from the ionosphere, which accompanied ionospheric ...