Post-Wall Waveguide Circuit Consisting of -junctions for a Center-Feed Parallel Plate Slot Array
نویسندگان
چکیده
The center-feed structure is applied to the post-wall waveguide fed parallel plate slot array to widen the frequency bandwidth. The center-feed antenna has a blocking area at its center. This blocking makes the sidelobe level high in the Eplane, therefore the width of the blocking area should be reduced. The authors propose a novel center-feed waveguide consisting of -junctions for this reduction. This structure can make the blocking width reduced from 2.6 to 2.1 . The measured sidelobe level in the E-plane of the novel feed using -junctions is suppressed down to 9.4 dB while that of the conventional feed using cross-junctions is 7.8 dB in uniformly excited antennas.
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