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Quasi-optical waveguide filter

  • US 4,598,262 A
  • Filed: 06/08/1983
  • Issued: 07/01/1986
  • Est. Priority Date: 06/08/1983
  • Status: Expired due to Term
First Claim
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1. A quasi-optical waveguide filter, comprising:

  • a waveguide section, having an axis of energy propagation, and including means for coupling said section to other elements of a waveguide system;

    a plurality of gratings installed in said waveguide section at uniform intervals along the axis of propagation and substantially perpendicular to it, each of said gratings having a pattern of conductive strips formed on an insulating layer, the pattern conforming to the contours of a selected waveguide mode, whereby each of said gratings is operative to selectively transmit a first wave in the selected waveguide mode, linearly polarized in a direction parallel with the strip pattern on a first one of said gratings, and a second wave in the selected waveguide mode, linearly polarized in a direction perpendicular to the first wave;

    wherein the angular orientation of the first of said gratings is aligned with the direction of linear polarization with the first wave and the angular orientations of said gratings with respect to each other are selected to provide a selected frequency characteristic to said filter.

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