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Helical antenna having a solid dielectric core

  • US 5,854,608 A
  • Filed: 12/06/1994
  • Issued: 12/29/1998
  • Est. Priority Date: 08/25/1994
  • Status: Expired due to Term
First Claim
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1. An antenna for operation at a frequency in excess of 200 MHz, comprising an electrically insulative antenna core of a solid material having a relative dielectric constant greater than 5, the core having distal and proximal ends, a three-dimensional antenna element structure which includes a plurality of longitudinally extending conductive elements, the structure being disposed on or adjacent an outer surface of the core and defining an interior volume, and a feeder structure which is connected to the antenna element structure and passes through the core from the proximal end of the core to connections with the distal ends of the longitudinally extending conductive elements, the material of the core occupying the major part of said interior volume.

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