نوع مقاله : مقاله پژوهشی
نویسندگان
1 کارشناسی ارشد، دانشگاه یزد، یزد، ایران
2 دانشیار،دانشگاه یزد، یزد، ایران.
3 استادیار، دانشگاه صنعتی نوشیروانی بابل، بابل، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Reflector antennas with mechanical beam steering ability are usually used to scan the surrounding space in telecommunication applications such as radars and satellites. On the other hand, mechanical rotation of antennas is difficult, slow and costly with low accuracy. Also, mechanical beam steering method is not suitable for applications that require changing beam direction with high speed. In this paper a dual reflector Cassegrain antenna with electronic beam steering capability is designed. A two-bit reconfigurable digital metasurface is used as a sub-reflector where its tunable unit cells are designed with varactors and beam steering is realized through controlling the phase profile of the metasurface. Results show that the proposed antenna with a high gain of 35 dB has 20 degrees beam steering range with 0.1 degrees resolution. This antenna can be considered as an applicable solution for the next generation of telecommunication systems due to the elimination of the mechanical beam steering problems of the reflector antennas.
کلیدواژهها [English]
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