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Waveguide-fed parallel plate slot array antenna

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3 Author(s)
Hirokawa, J. ; Dept. of Electr. & Electron Eng., Tokyo Inst. of Technol., Japan ; Ando, M. ; Goto, Naohisa

A novel planar antenna in which radiating slots are arrayed on one side of a square parallel plate waveguide and coupling slots occupy the other side is proposed. The antenna is excited via the coupling slots by a rectangular waveguide. In order to suppress unwanted reflections and to assure the purity of the transverse electromagnetic traveling-wave mode in the parallel plate waveguide, all the slots are arrayed in pairs. An X-band model antenna was fabricated, and uniform aperture illumination was demonstrated with 48% antenna efficiency. These results demonstrate the feasibility of antennas of this type

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Antennas and Propagation, IEEE Transactions on  (Volume:40 ,  Issue: 2 )