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Method and apparatus for reducing residual RF power in a transmitter/receiver antenna

  • US 5,365,235 A
  • Filed: 09/07/1993
  • Issued: 11/15/1994
  • Est. Priority Date: 09/07/1993
  • Status: Expired due to Fees
First Claim
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1. A method for interrogating a transponder using a single transmit-receive antenna, comprising the steps of:

  • generating a first transmission signal having a first phase for a time interval which energizes said transponder;

    generating a second transmission signal after said first transmission signal having a second phase which reduces residual energy in said antenna; and

    receiving an RF signal on said antenna from said transponder.

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