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Stub matched antenna and method of feeding same

  • US 4,259,673 A
  • Filed: 06/05/1979
  • Issued: 03/31/1981
  • Est. Priority Date: 06/05/1979
  • Status: Expired due to Term
First Claim
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1. An antenna comprising a substantially straight vertical radiator, a driven element generally a quarter of a wavelength long at the desired operating frequency and closely spaced from said radiator, said element being defined by an integral, substantially straight part, coil means feeding and driving said element, said coil means being electrically coupled to a feedline and including a coil insulated from and perimetrically wound around said straight part such that said element, in conjunction with a portion of said vertical radiator, acts as a quarter-wave stub at the desired operating frequency, said coil adapted for selective indexing on said straight part thereby to allow the matching of the feedline impedance to the antenna impedance.

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