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Method and system for radiating RF power from a trailing wire antenna

  • US 4,335,469 A
  • Filed: 06/18/1980
  • Issued: 06/15/1982
  • Est. Priority Date: 06/18/1980
  • Status: Expired due to Term
First Claim
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1. A method of applying the output of a transmitter power amplifier means to a trailing wire antenna of an airborne RF transmitter system to effect optimum message transmission during extension and retraction toward and from the optimum length of the antenna, comprisingvarying the inductance of the antenna coupler in response to the antenna change of length to provide a high-resistance load having minimal reactance to the power amplifier means, andvarying the value of the power output of the power amplifier means as a function of the voltage amplitude sensed at the feed end of the antenna and the voltage and current sensed at opposite sides of the coupler.

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