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Apparatus and method for controlling a tunable matching network in a wireless network

  • US 8,712,348 B2
  • Filed: 08/22/2011
  • Issued: 04/29/2014
  • Est. Priority Date: 09/01/2010
  • Status: Active Grant
First Claim
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1. An apparatus for managing impedance values in a radio in a wireless network, the apparatus comprising:

  • a first tunable matching network (TMN) positioned on a path between a transceiver and at least one antenna, the first TMN comprising a first plurality of immittance elements;

    a front end module operably connected to the first TMN and the transceiver,a first voltage standing wave ratio (VSWR) detector configured to detect a ratio of a signal from the front end module passing the first VSWR detector and a signal reflected from the first TMN;

    a second TMN operably connected to the front end module and a power amplifier in the transceiver, the second TMN comprising a second plurality of immittance elements;

    a second VSWR detector configured to detect a power amplifier ratio of a signal from the power amplifier and a signal reflected from the second TMN;

    a first control circuit configured to identify initial settings for the first TMN based on operating conditions of the radio, set a number of the first plurality of immittance elements based on the initial settings, monitor the ratio detected by the first VSWR detector, and repeatedly modify the initial settings of the first TMN based on the monitored ratio; and

    a second control circuit configured to set a number of the second plurality of immittance elements based on the initial settings, and modify the initial settings of the second TMN based on the power amplifier ratio detected by the second VSWR detector.

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