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Wide area multipurpose tracking system

  • US 6,333,690 B1
  • Filed: 10/11/1995
  • Issued: 12/25/2001
  • Est. Priority Date: 03/29/1995
  • Status: Expired due to Term
First Claim
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1. In a radio frequency tracking system comprising a plurality of transmitters and a receiver, the receiver having an antenna, a method, comprising the step of:

  • adjusting a reception range of the antenna by changing attenuation of signals applied to the receiver by the steps including;

    if the reception range is less than a desired reception range, decreasing attenuation; and

    if the reception range exceeds the desired reception range, increasing attenuation.

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