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Dielectrically loaded antenna and a handheld radio communication unit including such an antenna

  • US 5,945,963 A
  • Filed: 06/13/1996
  • Issued: 08/31/1999
  • Est. Priority Date: 01/23/1996
  • Status: Expired due to Term
First Claim
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1. An antenna for operation at frequencies in excess of 200 MHz, comprising an electrically insulative core of a solid material having a relative dielectric constant greater than 5, and an antenna element structure disposed on or adjacent the outer surface of the core, the material of the core occupying the major part of the volume defined by the core outer surface, wherein the antenna element structure comprises a single pair of elongate antenna elements which are disposed in an opposing configuration on or adjacent the core outer surface and which are co-extensive, with each element extending between axially spaced-apart positions, and wherein said elongate antenna elements each have a first end and a second end, the first ends being interconnected so that said antenna elements form together a path of conductive material around the core, the second ends of the antenna elements constituting a feed connection.

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