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Method and apparatus for improving the isolation characteristics of HD radio combiners

  • US 7,831,222 B1
  • Filed: 02/24/2006
  • Issued: 11/09/2010
  • Est. Priority Date: 02/24/2006
  • Status: Active Grant
First Claim
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1. A method for improving transmitter isolation in a radio signal transmission system comprising a combiner for combining digital and analog radio signals, a digital radio signal transmitter coupled to said combiner, an analog radio signal transmitter coupled to said combiner, an antenna coupled to said combiner, and a reject load coupled to said combiner, said method comprising the steps of:

  • a. coupling an impedance matching device between said reject load and said combiner; and

    b. adjusting said impedance matching device to reduce the energy transmitted from said digital signal transmitter to said analog signal transmitter through said combiner.

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