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Method and apparatus for tuning antennas in a communication device

  • US 8,432,234 B2
  • Filed: 01/12/2011
  • Issued: 04/30/2013
  • Est. Priority Date: 11/08/2010
  • Status: Active Grant
First Claim
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1. A matching network for a communication device having first and second antennas, the matching network comprising:

  • a first variable component connectable along a first path between the first antenna and a front end module of the communication device; and

    a detector connectable along a second path between the second antenna and the front end module of the communication device, wherein the detector obtains an RF voltage associated with the second path, and wherein the first variable component is adjusted based on derivative information associated with the detected RF voltage to tune the matching network, wherein the derivative information is determined by calculating a finite difference of two sequential measurements associated with reactance settings for the matching network.

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