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Microwave diode phase shifter

  • US 4,647,880 A
  • Filed: 01/17/1986
  • Issued: 03/03/1987
  • Est. Priority Date: 04/16/1985
  • Status: Expired due to Fees
First Claim
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1. A two state microwave signal phase shifter comprising:

  • a first signal conductor disposed in a first plane and having a non-uniform width therein along its length between its input and output terminals, its non-uniform width comprising a pair of tapered sections each beginning in a wide portion at a location adjacent a respective one of said terminals and ending in a narrow portion at the central section of said first signal conductor,a second signal conductor electromagnetically coupled to said first signal conductor and disposed in overlapping relationship therewith in a second plane parallel to and spaced apart from the first plane, said second signal conductor having a non-uniforming width along its length, its non-uniform width comprising a pair of tapered sections each beginning in a narrow portion proximate a respective one of said locations and ending in a wide portion at the central section of said second signal conductor, said second signal conductor wide portion being wider than said first signal conductor wide portion, such that said electromagnetic coupling couples microwave energy from said first signal conductor to said second signal conductor while maintaining continuity in the electromagnetic field and in the characteristic impedance of said first signal conductor;

    a ground plane element disposed in a third plane parallel to and spaced apart from the first plane;

    third and fourth signal conductors connected to said second signal conductor and disposed perpendicular to the second signal conductor;

    fifth and sixth conductors disposed in said second plane;

    switching means connecting the opposite ends of said third and fourth conductors to said fifth and sixth conductors; and

    a seventh conductor for connecting said fifth and sixth conductors to said ground plane element.

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