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Coupler for feeding extensible transmission line

  • US 4,278,955 A
  • Filed: 02/22/1980
  • Issued: 07/14/1981
  • Est. Priority Date: 02/22/1980
  • Status: Expired due to Term
First Claim
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1. A coupler for coupling a fixed r.f. signal source to a sliding transmission line comprising:

  • a planar elliptical cavity of electrically conductive material,input means inputting an r.f. signal at a point connecting with one focus of said elliptical cavity,an r.f. transmission line slidably extending through an aperture coinciding with the other focus of said elliptical cavity, the distance between ellipse foci being one half wavelength less than the length of the ellipse'"'"'s major axis.

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