Circumferential Slotted Ridged Waveguide Array Antenna.
Patent, Filed 25 Jan 85, patented 14 Apr 87,
DEPARTMENT OF THE NAVY WASHINGTON DC
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An antenna for providing a broadband omnidirectional circumferential radiation pattern is formed by an array off arcuate waveguide radiators arranged to form a cylindrical antenna. Each waveguide radiator has a ridged waveguide cavity and a plurality of longitudinally-oriented slots communicating with the waveguide cavity. The slots are arranged in two parallel rows on either side of the longitudinal centerline in a staggered relationship along the outside surface of the radiator. Each radiator is fed from the interior of the cylindrical array at a feed point located at the center of the radiator. Patent
- Electrical and Electronic Equipment