Waveguide transition for flat plate antenna

Details Waveguide transition for flat plate antenna Waveguide transition for flat plate antenna

H - Electricity

03

H

H03H 7/48 (2006.01) H01Q 21/00 (2006.01) H01Q 21/06 (2006.01)

Patent

CA 2059364

ABSTRACT OF THE DISCLOSURE In a flat plate antenna, insertion loss is reduced significantly by providing an extensive waveguide struc- ture at the back of the ground plane of the antenna. Depending on antenna size, the waveguide may feed the antenna at one or a plurality of points. According to a preferred embodiment, the transition from waveguide to stripline is made via a coaxial connection, with a quarter-wave transformation, including mode suppression walls to direct the energy more efficiently. Alterna- tively, a direct waveguide to stripline transition may be provided. The technique has wide applicability to a number of antenna designs, including single- and dual- polarization structures, and linear and circular polarization operation.

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