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Investigation of Array Techniques for Multiple Beams Within Limited Spatial Sectors

出版	Defense Technical Information Center, 1977
URL	http://books.google.com.hk/books?id=b3FkNwAACAAJ&hl=&source=gbs_api

註釋

An antenna technique which is capable of providing multiple independent beams over limited scan sections has been developed. This antenna design utilizes overlapping subarrays fed by a stacked-pillbox multiple beam lens. Beams generated by the multiple beam lens can be selected by a beam switching matrix. An antenna design has been worked out to provide 8 or 16 multiple simultaneous beams over an 8 degree half angle cone. The antenna depth is less than the aperture diameter so that it is compact. In this design, sidelobe level of -25 dB or lower is achieved with adjacent beams cross over at -2 dB. Multiple simultaneous beams with negligible beam coupling loss is accomplished by selecting beams which are more than one beam step apart. (Author).