High frequency aircraft wire antenna

Details High frequency aircraft wire antenna High frequency aircraft wire antenna

1978-06-26

1980-04-08

Lieberman, Eli

Communications: radio wave antennas

Antennas

With aircraft

343752, H01Q 128

Patent

active

041975472

ABSTRACT:
What is disclosed is an antenna system for aircraft and one having particr utilization on a helicopter where there is a need, among other things, to eliminate insofar as possible rotor blade modulation of the signal radiated from on-board air-to-ground communication system in the 2 to 30 MHz band. The antenna comprises a current fed grounded loop-antenna having an electrical length which is relatively short with respect to the operating wavelength. The antenna conductor is mounted by means of insulators on the outside of the aircraft body, having one end connected to the transmitter while the other end is series connected to a lumped electrical inductance element whose opposite end is terminated in the metallic skin of the aircraft. The electrical inductance, moreover, is variable so as to resonate the antenna to the driving impedance of the transmitter.

REFERENCES:
patent: 2044779 (1936-06-01), Hanson
patent: 2279130 (1942-04-01), Bruce
patent: 2756423 (1956-07-01), Dylewski
patent: 3151327 (1964-09-01), Levy et al.
patent: 3172110 (1965-03-01), Zieg
patent: 3936834 (1976-02-01), Vallese et al.
Cincinnati Electronics, Model AA-20HF Tranline.RTM. Antenna.

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