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Antenna switch circuit and antenna switch module

  • US 20040217914A1
  • Filed: 02/04/2004
  • Published: 11/04/2004
  • Est. Priority Date: 02/05/2003
  • Status: Active Grant
First Claim
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1. An antenna switch circuit connected to a common antenna for switching the connection of said antenna to transmission circuits or receiving circuits in plural transmitting/receiving systems having different passbands, comprising a diplexer circuit comprising a low-pass filter and a high-pass filter;

  • a first switch circuit connected to said low-pass filter and comprising diodes, transmission lines and at least one capacitor for switching a transmitting line and a receiving line;

    a second switch circuit connected to said high-pass filter and comprising diodes, transmission lines and at least one capacitor for switching a transmitting line and a receiving line; and

    a fourth switch circuit connected to said second switch circuit and comprising a semiconductor element for switching said receiving line from said second switch circuit.

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