Other

Kunitaka Arimura

Naohisa Goto

Yoshiharu Ito

Makoto Ando

Ryuji Teramoto

Tatsuya Shirai

This invention provides a flat circular waveguide device which permits uniform radiation or power through a plurality of power-radiating openings in order to increase the antenna gain in the technical field of electric communications, especially, broadcasting antennas. To achieve such uniform radiation of power, the device is equipped with means for feeding power from a peripheral wall of a wave-guiding space, which is surrounded by metallic walls, toward a central part of the wave-guiding space.

Flat circular waveguide device

The present invention relates to telecommunication technology and broadcasting antenna technology. The power-feeding portion and the wave-guiding space, and the power-feeding wave-guiding space and the power-radiating wave-guiding space are matched for the effective radiation of the fed power. A conical matching body is disposed within the wave-guiding space with the apex thereof directed toward a power-feeding opening; the junction of the power-feeding wave-guiding space and the power-radiating wave-guiding space is formed in a sectional shape of a semicircle, a hemihedral polygon or a desired curvilinear shape; the power-feeding wave-guiding space the power-radiating wave-guiding space are matched in impedance; or a matching body is provided at the junction of the power-feeding wave-guiding space and the power-radiating wave-guiding space. A delaying means, such as a corrugated plate, is provided on the power-radiating surface or on a wall disposed opposite to the power-radiating surface, to radiate the power of the same phase uniformly with the reduced side lobe.

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Kanagawa-ken, Japan

Kunitaka Arimura