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Tunable antenna with slot-based parasitic element

  • US 9,331,397 B2
  • Filed: 03/18/2013
  • Issued: 05/03/2016
  • Est. Priority Date: 03/18/2013
  • Status: Active Grant
First Claim
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1. An electronic device antenna, comprising:

  • an antenna ground;

    an inverted-F antenna resonating element that has a resonating element arm that is separated from the antenna ground by a gap, wherein the inverted-F antenna resonating element comprises a metal electronic device housing structure;

    a slot-based parasitic antenna resonating element that is near-field coupled to the inverted-F antenna resonating element and that comprises a slot having a first edge defined by the metal device housing structure and an opposing second edge defined by the antenna ground; and

    an antenna feed having a positive antenna feed terminal coupled to the inverted-F antenna resonating element and a ground antenna feed terminal coupled to the antenna ground, wherein the slot-based parasitic antenna resonating element is not directly fed by the antenna feed.

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