Abstract
Mobile reception of direct broadcast satellites (DBS) has been very popular and the number of vehicles with DBS receiving systems is also rapidly increasing in Japan. Low-profile, mass-produceable, beam-tilting and high-efficiency receiving antennas had been desired to this end. We developed a single-layer slotted leaky waveguide array antenna for the single-polarized DBS in Japan which satisfies all these requirements. A novel single layer feed structure is applied to the antenna, which consists of cascades of /spl pi/-junctions and radiating waveguides as shown. The cross slots are densely arranged on the broad wall of the radiating waveguides. The leaky wave radiates a circular polarized beam in a large tilting angle of about 45 degrees from the zenith. It is advantageous for mobile DBS reception since the antenna can be installed horizontally on the roof of vehicles. A mechanical system steers the antenna to track the satellite only in the azimuthal plane. Tracking is not necessary in the elevation plane, since the beam width of the antenna with a short radiating waveguide is broad.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.