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Quadruple mode filter

  • US 4,792,771 A
  • Filed: 02/17/1987
  • Issued: 12/20/1988
  • Est. Priority Date: 02/21/1986
  • Status: Expired due to Fees
First Claim
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1. A bandpass filter comprising at least one four mode cavity, with tuning screws and coupling screws arranged in said filter so that said four mode cavity resonates at its resonant frequency in four independent orthogonal modes simultaneously, with any additional cavities to said four mode cavity being immediately adjacent to one another or to said four mode cavity, at least one of any additional cavities being immediately adjacent to said four mode cavity, with any immediately adjacent cavities being coupled to one another and resonating at their resonant frequency, said filter having an input and output.

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