Radio signal propagation in the VHF. UHF, SHF and EHF - range VHF : Very High Frequency 30 MHz - 300 MHz UHF: Ultra High Frequency ...

Signal propagation in the long, middle and shortwave range LW: Low wave / frequency: 30 kHz - 300 kHz MW: Medium wave / frequency: 0,3...

Radio relais are located in exposed locations and are used to transmit the received signal again in order to cover a larger transmission...