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DUPLEXER AND METHOD FOR SEPARATING A TRANSMIT SIGNAL AND A RECEIVE SIGNAL

  • US 20110080856A1
  • Filed: 10/01/2009
  • Published: 04/07/2011
  • Est. Priority Date: 10/01/2009
  • Status: Active Grant
First Claim
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1. A duplexer for separating a transmit signal (Tx) and a receive signal (Rx), the duplexer, comprising:

  • a transmit filter for substantially forwarding the transmit signal within an at least one transmit band to an antenna;

    a receive filter for substantially forwarding the receive signal within at least one receive band from the antenna to a receive path;

    an analogue quadrature splitter adapted to split the transmit signal into an in phase component and a quadrature component;

    a first filtering element with a first filtering characteristic comprising at least one first pass band and at least one first stop band;

    a second filtering element with a second filtering characteristic comprising at least one second pass band and at least one second stop band;

    wherein the analogue quadrature splitter is adapted to increase an attenuation of the transmit signal outside the transmit band.

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