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Method of channel frequency allocation for RF and microwave duplexers

  • US 6,492,883 B2
  • Filed: 11/02/2001
  • Issued: 12/10/2002
  • Est. Priority Date: 11/03/2000
  • Status: Expired due to Term
First Claim
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1. A method of operating a duplexer including a first tunable bandpass filter, a second tunable bandpass filter and means for coupling the first bandpass filter and the second bandpass filter to an antenna, the method comprising the steps of:

  • tuning the first tunable bandpass filter to provide a passband corresponding to an assigned transmit frequency, and tuning the second tunable bandpass filter to provide a passband offset from an assigned receive frequency, when the duplexer is operated in a transmit mode; and

    tuning the first tunable bandpass filter to provide a passband offset from an assigned transmit frequency, and tuning the second tunable bandpass filter to provide a passband corresponding to the assigned receive frequency, when the duplexer is operated in a receive mode.

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