Antenna tuning system and method

Details Antenna tuning system and method Antenna tuning system and method

1985-06-10

1987-08-25

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

455125, H04L 2710

Patent

active

046898034

ABSTRACT:
A dynamic antenna tuning system particularly adapted for VLF frequency-shift (as opposed to on-off) keyed transmitters, employing saturable magnetic switching amplifiers providing variable tuning inductance between the antenna and transmitter and controlled to effect a gradual and not abrupt switching of the radio frequency during on-off transitions to enable narrow VLF frequency spectrum operation.

REFERENCES:
patent: 3904966 (1975-09-01), Firman
patent: 3939422 (1976-02-01), Deise
patent: 4059801 (1977-11-01), Johannessen et al.
patent: 4521913 (1985-06-01), Huber et al.
patent: 4555792 (1985-11-01), Van Tol
Jacob, M. I. & Brauch, H. N., "Keying VLF Transmitters at High Speed", Electronics, vol. 27 (1954), No. 12, pp. 148-151.
"Controlled Antenna Reactor for Bandwidth Enhancement (CARBE)", RADC TR-74-161 (Jul. 1974), by Planck.

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