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Wireless Signal Switching Circuit and Wireless Communication Apparatus

  • US 20070213015A1
  • Filed: 06/21/2004
  • Published: 09/13/2007
  • Est. Priority Date: 06/26/2003
  • Status: Active Grant
First Claim
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1. A wireless signal switching circuit for switching a plurality of transmitter and receiver signals having different frequencies in wireless communication for communication by at least a first communication system and a second communication system, comprising:

  • an antenna terminal (11) connected to an antenna (ANT);

    a first signal route switching means (20) having a plurality of switch means (21, 23, 24, 60) for selecting a plurality of transmitter and receiver signals having different frequencies (F2 or F3) in the first communication system;

    a phase rotating means (40) having one end (40a) connected to the antenna terminal (11) and imparting a phase rotation of 90 degrees to the phase of the signal of the frequency component supplied to the first signal route switching means (20); and

    a second signal route switching means (30) having a diplexer (31) for separating the transmitter and receiver signals having a further different frequency (F1) of the first communication system lower than the plurality of frequencies (F2, F3) in the first communication system explained above and the transmitter and receiver signals of the second communication system, a common input and output terminal (31a) of the diplexer (31) being connected to the other end (40b ) of the phase rotating means, a first filter side terminal (31b) of the diplexer (31) being supplied with transmitter and receiver signals having a further different frequency (F1) of the first communication system, and a second filter side terminal (31c) of the diplexer (31) being supplied with transmitter and receiver signals of the second communication system.

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