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Antenna tuning for multiband operation

  • US 9,246,223 B2
  • Filed: 07/17/2012
  • Issued: 01/26/2016
  • Est. Priority Date: 07/17/2012
  • Status: Active Grant
First Claim
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1. A multiband antenna comprising:

  • a feed port;

    a first radiating portion coupled to the feed port and defining a first resonant bandwidth;

    a second radiating portion coupled to the feed port and defining a second resonant bandwidth differing from the first resonant bandwidth, the second radiating portion comprising;

    a proximal radiating segment extending axially between two ends, supported on a first substrate and coupled to the feed port;

    a distal radiating segment supported on a second substrate, wherein a portion of the first substrate at a first one of the two ends overlaps a portion of the second substrate to obtain overlapping portions of the proximal radiating segment and the distal radiating segment that define a first gap therebetween; and

    an adjustable tuning circuit coupled between the overlapping portions of the proximal radiating segment and the distal radiating segment, wherein adjustment of the adjustable tuning circuit modifies the second resonant bandwidth without altering the first resonant bandwidth,wherein the first radiating portion comprises;

    a proximal radiating segment extending axially between two ends, supported on the first substrate and coupled to the feed port;

    a distal radiating segment supported on the second substrate, wherein a portion of the first substrate at a first one of the two ends overlaps a portion of the second substrate to obtain overlapping portions of the proximal radiating segment and the distal radiating segment that define a second gap therebetween; and

    an adjustable tuning circuit coupled between the overlapping portions of the proximal radiating segment and the distal radiating segment, wherein adjustment of the tuning circuit modifies the first resonant bandwidth without altering the second resonant bandwidth.

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