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Wideband circularly polarized hybrid dielectric resonator antenna

  • US 8,928,544 B2
  • Filed: 02/21/2011
  • Issued: 01/06/2015
  • Est. Priority Date: 02/21/2011
  • Status: Active Grant
First Claim
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1. A dielectric resonator antenna comprising:

  • a dielectric resonator;

    a ground plane, operatively coupled with the dielectric resonator, the ground plane having four independent slots with each slot being arc in shape and forming a ring configuration; and

    a substrate, operatively coupled to the ground plane, having a feeding network consisting of four microstrip lines, with each microstrip line feeding independently into each slot;

    wherein the four slots are constructed and geometrically arranged to ensure circular polarization and coupling to the dielectric resonator;

    wherein the antenna feeding network combines the four microstrip lines with a 90 degree phase difference to generate circular polarization over a wide frequency band; and

    wherein the feeding network includes a compact wideband rat-race combined with two surface mount (SMT) branch-line hybrid couplers.

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