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Delay line filter

  • US 6,317,013 B1
  • Filed: 06/14/2000
  • Issued: 11/13/2001
  • Est. Priority Date: 08/16/1999
  • Status: Expired due to Fees
First Claim
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1. A delay circuit comprising:

  • a delay compensating circuit comprising a miniaturized 3 db quadrature hybrid coupler having first, second, third, and fourth ports; and

    a filter comprising a plurality of lumped elements coupled in series with said delay compensating circuit to one of said first and second ports, wherein said plurality of lumped elements comprises a plurality of capacitive traces disposed in series, a plurality of inductors, each of said plurality of capacitive traces being connected to one of said plurality of inductors, and a plurality of proximity coupling wires, and wherein each of said proximity coupling wires has a first end connected to one of said plurality of capacitive traces, and a second end disposed above an adjacent one said plurality of capacitive traces.

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