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ACTIVE REDUCTION OF ELECTRIC FIELD GENERATED BY A TRANSMIT ANTENNA VIA AN AUXILLARY ANTENNA STRUCTURE

  • US 20110090126A1
  • Filed: 10/21/2009
  • Published: 04/21/2011
  • Est. Priority Date: 10/21/2009
  • Status: Active Grant
First Claim
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1. A method of operating a wireless communication device comprising a main antenna and an auxiliary antenna structure, the method comprising the steps of:

  • reducing a first magnitude of an amplified RF signal to generate a drive signal having a second magnitude that is less than the first magnitude;

    shifting a phase angle of the drive signal to generate a phase-shifted drive signal that is phase shifted with respect to the amplified RF signal; and

    driving the main antenna with the amplified RF signal to radiate a first electric field having a first near-field component, and simultaneously driving the auxiliary antenna structure with the phase-shifted drive signal to radiate a second electric field having a second near-field component that reduces the magnitude of the first near-field component.

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