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ANTENNA SELF-TEST SYSTEMS

  • US 3,697,876 A
  • Filed: 10/17/1969
  • Issued: 10/10/1972
  • Est. Priority Date: 10/17/1969
  • Status: Expired due to Term
First Claim
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1. A system for receiving energy, said system having a first receiver apparatus coupled to an antenna capable of radiating and receiving energy, wherein the improvement comprises:

  • an antenna test probe capable of radiating and receiving energy, said test probe being positioned in close proximity to said antenna and within the field of radiation of said antenna;

    test means adapted to apply a test signal having prearranged information to provide a predictable result to said test probe, said test means comprising a signal generator means arranged to generate a first signal having fixed frequency, a sweep oscillator means arranged to receive said first signal and to generate a second signal which varies in frequency between a third and a fourth frequency, and an oscillator means arranged to generate a fifth signal having a sixth frequency, said oscillator means adapted to receive said second signal and to modulate said fifth signal thereby to generate a seventh signal which varies in frequency between an eighth and ninth frequency, said eight frequency being less and said ninth frequency being greater than the frequency of said fifth signal, and circuit means arranged to couple said seventh signal to said test probe, said first receiver apparatus to receive and process said test signal; and

    indication means responsive to the processing of said test signal to provide an indication of the predictable result if said first receiver apparatus is functioning properly.

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