VLF communication system

Details VLF communication system VLF communication system

1988-12-22

1990-02-20

Hille, Rolf

Communications: radio wave antennas

Antennas

With aircraft

343848, 343849, H01Q 128

Patent

active

049030361

ABSTRACT:
A VLF communication system which utilizes the tether of an aerostat system as the VLF antenna. The aerostat is flown at an altitude such that the tether is approximately a quarter wavelength of the operating frequency and the transmitter signal is coupled to the antenna by means of a elongated sleeve transformer surrounding the tether and including a single turn primary coupled to the transmitter with the tether acting as a single turn secondary of the transformer.

REFERENCES:
patent: 1296687 (1919-03-01), Nichols
patent: 1320142 (1919-10-01), Hanson
patent: 1650461 (1927-11-01), Nilson
patent: 2433344 (1947-12-01), Crosby
patent: 3253279 (1966-05-01), Tanner
patent: 3727229 (1973-04-01), Clinger et al.
patent: 4476576 (1984-10-01), Wheeler et al.

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