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Handheld electronic devices with isolated antennas

  • US 8,094,079 B2
  • Filed: 08/14/2009
  • Issued: 01/10/2012
  • Est. Priority Date: 01/04/2007
  • Status: Active Grant
First Claim
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1. Wireless communications circuitry in a handheld electronic device comprising:

  • first and second wireless transceiver circuits that transmit and receive radio-frequency signals;

    first and second transmission lines associated respectively with the first and second wireless transceiver circuits for conveying the radio frequency signals;

    first and second antennas, wherein the first antenna is connected to the first transmission line and wherein the second antenna is connected to the second transmission line; and

    an isolation element associated with the first antenna that resonates in a frequency band in which the second antenna operates and reduces interference between the first antenna and the second antenna during simultaneous antenna operation, wherein the first antenna comprises a planar antenna resonating element and wherein the isolation element is formed as a part of the planar antenna resonating element that is coplanar with the planar antenna resonating element.

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