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Corrugated transition device for use between a continuous and a corrugated circular waveguide with signal in two different frequency bands

  • US 4,680,558 A
  • Filed: 09/05/1985
  • Issued: 07/14/1987
  • Est. Priority Date: 12/27/1983
  • Status: Expired due to Term
First Claim
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1. In a transition device operable in a first frequency band and a second, distinctly different frequency band comprising a waveguide having first and second ports and having a tapered interior boundary wall containing alternately positioned first and second type slots of distinct relative configuration aligned transverse to the axis of said waveguide, the improvement comprising:

  • said first and second type slots each configured near said first port to have (i) respective first and second susceptances for signals in said first frequency band, which first and second susceptances are each non-zero and substantially equal in magnitude, with one of said first and second susceptances being capacitive and the other being inductive, and (ii) respective third and fourth susceptances for signals in said second, distinctly different frequency band, which third and fourth susceptances are each non-zero and substantially equal in magnitude, with one of said third and fourth susceptances being capacitive and the other being inductive, such that said first and second susceptances, in combination, and said third and fourth susceptances, in combination, provide respective and simultaneous high susceptance mutual resonance conditions between adjacent ones of said first and second type slots for said first and second frequency bands as are required for simultaneous matching of said device with a continuous waveguide at said first port, for signals in said first and second frequency bands.

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