Antenna system for airborne transceiver providing quasi continuous reception and transmission free from shadowing by aircraft structure

摘要

One quarter wavelength monopoles on the top and bottom centerline of the aircraft fuselage provide hemispherical coverage for an airborne transceiver thereby reducing shadowing during maneuver. A solid state pair of PIN diodes capable of transmitting and receiving V.H.F. A.M. band energy are utilized in an antenna lobing switch circuit for alternating between antennas at a switching rate of 25 KHz.