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Antenna for near field sensing and far field transceiving

  • US 10,193,228 B2
  • Filed: 10/22/2014
  • Issued: 01/29/2019
  • Est. Priority Date: 10/24/2013
  • Status: Active Grant
First Claim
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1. An antenna, comprising:

  • a first electrical conductor having first and second ends, said first electrical conductor shaped to form a first spiral between said first and second ends, said first and second ends remaining electrically unconnected such that said first electrical conductor so-shaped is maintained as an unconnected single-component open-circuit having inductance and capacitance wherein, in the presence of a time-varying electromagnetic field, said first electrical conductor so-shaped resonates to generate a radiation pattern;

    a second electrical conductor including a loop portion overlapping at least a portion of said first spiral, said second electrical conductor being electrically isolated from said first electrical conductor;

    a radio frequency transceiver electrically couple to said second electrical conductor for exciting said loop portion with electromagnetic energy wherein said time-varying electromagnetic field is generated in the presence of said first spiral; and

    a third electrical conductor having first and second ends, said third electrical conductor shape to form a second spiral between said first and second ends of said third electrical conductor, said first and second ends of said third electrical conductor remaining electrically unconnected such that said third electrical conductor so-shaped is maintained as an unconnected single-component open-circuit having inductance and capacitance, wherein said third electrical conductor so-shaped experiences resonance changes when subjected to environmental changes of interest, and wherein said loop portion is disposed between said first spiral and said second spiral,wherein said radiation pattern is modulated with said resonance changes.

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