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Multimode front end and wireless communication apparatus

  • US 20020016183A1
  • Filed: 07/18/2001
  • Published: 02/07/2002
  • Est. Priority Date: 07/19/2000
  • Status: Abandoned Application
First Claim
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1. A multimode front end for a wireless communication apparatus, which communication apparatus is arranged for at least time division duplex, TDD, and frequency division duplex, FDD, types of signals, the front end comprising:

  • a reception chain for processing received FDD and TDD signals;

    a transmission chain for creating FDD and TDD signals to be transmitted;

    transmission/reception means for receiving and transmitting signals;

    a duplex filter for filtering the FDD transmission band and the FDD reception band and for separating them from each other, which duplex filter is functionally connected to the transmission/reception means, reception chain and transmission chain; and

    at least one pair of TDD reception filter—

    TDD transmission filter, which filters are arranged on a common frequency band and functionally connected to the transmission/reception means, the TDD reception filter being functionally connected to the reception chain and the transmission chain being functionally connected to the TDD transmission filter.

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