Tactical high frequency antenna

摘要

An electrically short (less than lambda /4) antenna for operation in the frequency range from 2 to 30 megahertz (MHz). The antenna system contemplated by the subject invention comprises a short inductively loaded vertical radiating element having a capacitive top termination, a ground system and an automatic remote control of the tuning of the antenna which senses the state of resonance of the antenna and operates to drive a tuning reactance, e.g. a variable capacitor in series with the vertical radiator element to provide the required lambda /4 resonance at a given operating frequency.