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Transition from stripline to waveguide

  • US 4,562,416 A
  • Filed: 05/31/1984
  • Issued: 12/31/1985
  • Est. Priority Date: 05/31/1984
  • Status: Expired due to Term
First Claim
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1. A coupler for microwave coupling between a waveguide and a stripline, the coupler comprising:

  • A. a waveguide of elongated rectangular cross section having an opening at one end;

    B. a first generally planar ground-plane conductor covering the opening of the waveguide and forming an elongated aperture communicating with the waveguide interior through the waveguide opening;

    C. a second generally planar ground-plane conductor spaced apart from the first ground-plane conductor and extending generally parallel to it;

    D. shorting elements extending between the ground-plane conductors to connect them together and surrounding the aperture in the first ground-plane conductor to form a cavity defined by the ground-plane conductors and the shorting elements; and

    E. a feed line including a generally T-shaped feed element having a stem that extends between and generally parallel to the ground-plane conductors and into the cavity and having a crosspiece extending longitudinally of the aperture and shorted to the ground planes at its ends.

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