VLF communication system
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United States of America Patent
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-
Feb 20, 1990
Grant Date -
N/A
app pub date -
Dec 22, 1988
filing date -
Dec 22, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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