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Wide frequency range couplers and detectors for power detection in multiple frequency band systems

  • US 6,397,077 B1
  • Filed: 05/20/1998
  • Issued: 05/28/2002
  • Est. Priority Date: 05/20/1998
  • Status: Expired due to Term
First Claim
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1. A multiband phone capable of transmitting signals within multiple distinct frequency bands, where the phone selects a particular frequency at which to transmit the signal and the power of the selected transmission signal is measured and controlled, comprising:

  • a plurality of power amplifiers, each of the power amplifiers amplifying the power of a signal to be transmitted within a respective one of the multiple distinct frequency bands;

    a single, wide frequency range power sensing device for measuring the power of a signal selected to be transmitted from any of the power amplifiers, wherein the amplified signal output by each of the plurality of power amplifiers is connected to the power sensing device;

    a transmitting device connected to the output of the power sensing device for transmitting the signal selected to be transmitted; and

    a power detector switching device connected between the plurality of amplifiers and the power sensing device for switching the connection of the power sensing device between the plurality of power amplifiers so that the power sensing device is only connected to one of the plurality of power amplifiers at any time.

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