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Flared trough waveguide antenna

  • US 5,943,023 A
  • Filed: 12/21/1995
  • Issued: 08/24/1999
  • Est. Priority Date: 12/21/1995
  • Status: Expired due to Fees
First Claim
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1. A flared trough waveguide antenna, comprising:

  • a conductive trough having first and second ends, a bottom surface, and first and second opposing side surfaces electrically coupled to said bottom surface;

    a conductive fin, electrically coupled to said bottom surface between said first and second opposing side surfaces, that divides said trough into a first waveguide region adjacent said first side surface and a second waveguide region adjacent said second side surface, said conductive trough and said fin being configured such that said first and said second waveguide regions each receive and propagate a signal having an electric field generally perpendicular to said fin and directed outwardly therefrom;

    said conductive fin further having a substantially solid first face opposing at least a portion of said first side surface and a substantially solid second face opposing at least a portion of said second side surface; and

    a first and a second flared surface respectively coupled to said first and said second opposing side surfaces, said flared surfaces being configured in such a manner as to direct electromagnetic energy radiated by said flared trough waveguide antenna in a desired pattern;

    wherein said at least one of said first and second flared surfaces is configured to define a plurality of longitudinally disposed corrugations including a first and a second corrugation, said first corrugation having a greater depth than said second corrugation.

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