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Front end module for wireless network system

  • US 7,092,678 B2
  • Filed: 09/25/2003
  • Issued: 08/15/2006
  • Est. Priority Date: 08/05/2003
  • Status: Expired due to Fees
First Claim
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1. A front end module for wireless network system comprising:

  • a transmitting/receiving switch;

    a band-pass filter connected to the transmitting/receiving switch for receiving wanted signals and rejecting undesired signals;

    a balun connected to the band-pass filter for transferring the wanted signals from unbalance to balance;

    a power amplifier for raising the power of signals to be transmitted; and

    a low-pass filter connected to the power amplifier for rejecting the spurious signals of the signals to be transmitted;

    wherein the band-pass filter, the balun, and the low-pass filter lie inside a plurality of low temperature co-fired ceramic substrates while the transmitting/receiving switch and the power amplifier lie on a surface layer of the plurality of low temperature co-fired ceramic substrates.

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