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Variable helical antenna

  • US 6,011,525 A
  • Filed: 06/26/1998
  • Issued: 01/04/2000
  • Est. Priority Date: 07/04/1997
  • Status: Expired due to Fees
First Claim
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1. A helical antenna, comprising:

  • (a) first and second conductive helices extending about a common central axis in the same direction and having first portions interleaved with each other without being in mechanical contact and non-interleaved second portions; and

    (b) means for helically moving said second helix, by sliding, longitudinally relative to said first helix.

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