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Home Radio Broadband-circularly-polarized-dielectric-resonator-antenna

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Details
Inventors: Oliver, Matthew Bjorn; Antar, Yahia Mohamed Moustafa; Mongia, Rajesh Kumar; Ittipiboon, Apisak;
Assignee: Her Majesty the Queen in right of Canada, as represented by the Minister (Ottawa, CA)
Primary Examiner: Wong; Don
Assistant Examiner: Phan; Tho
Attorney, Agent or Firm: Neil Teitelbaum & Associates

A radiating antenna capable of generating or receiving circularly polarized radiation is disclosed using a single feed and a dielectric resonator. The dielectric resonator has slightly differing dimensions along two axes. Substantially polarized radiation can be generated in each of two mutually orthogonal modes by placement of the probe at each of two locations. When the feed is situated substantially between these two locations, two orthogonal modes are excited simultaneously.

DETAILED DESCRIPTION In accordance with an embodiment of the invention there is provided a radiating antenna comprising: a) a dielectric resonator antenna having a bottom surface and outer surfaces and designed to be capable of being excited in two orthogonal modes simultaneously; b) a single feed means capable of exciting two orthogonal modes simultaneously; whereby the feed means and the dielectric resonator operate in conjunction to simultaneously excite two mutually orthogonal modes in the dielectric resonator.
In accordance with an embodiment of the invention there is further provided a radiating antenna comprising: a) a single feed means further comprising i) a dielectric substrate having a conductive coating on an anterior side thereof and with an opening having unequal dimensions along two perpendicular axes coplanar with the dielectric substrate, and ii) a microstripline on a posterior side of the dielectric substrate disposed to cross the opening along the centre and parallel to the shorter of the unequal axes; and c) a dielectric resonator having a bottom surface, outer surfaces, and a length and width disposed on the conductive coating over the slot and further disposed such that an axis of the dielectric resonator is at an angle of substantially 45 degrees to the axes of the slot.



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