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Front-end module and communication terminal

  • US 20040152426A1
  • Filed: 11/07/2003
  • Published: 08/05/2004
  • Est. Priority Date: 11/08/2002
  • Status: Active Grant
First Claim
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1. A front-end module comprising:

  • a switching circuit for switching one antenna between a transmiting system and a receiving system;

    a power-amplifier for power-amplifying a transmission signal; and

    a low-pass filter inserted between the switching circuit and the power amplifier, wherein said switching circuit, power amplifier, and low-pass filter being unitary integrated, and wherein a first kind of harmonics produced from said switching circuit toward said power amplifier is reflected by said low-pass filter, a second kind of harmonics is produced from said power amplifier toward the antenna, and a third kind of harmonics produced from said switching circuit toward said antenna is canceled by said reflected first kind of harmonics and said second kind of harmonics.

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