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基于平行板环境下高阻电磁表面(HIS)的等效媒质模型,设计制作了两种不同的单向辐射矩形环缝天线:一种是基于传统的金属反射面,另一种是基于所设计的HIS反射面。仿真和测试结果显示:金属反射面矩形环缝天线由于受到平行板模式的影响,其单向辐射性能较差;而HIS反射面矩形环缝天线则获得了较好的单向辐射性能,与金属反射面天线相比,不仅其工作频带内的前后抑制比和法向增益得到大幅提高,而且整个天线的厚度仅为金属反射面天线的31%。由此验证了HIS在实现单向辐射缝隙天线中的优越性及其广泛的应用前景。
Based on the equivalent medium model of HIS in parallel plate, two different unidirectional rectangular reflector antennas are designed and fabricated: one is based on the traditional metal reflective surface and the other is based on the designed HIS reflective surface. The results of simulation and test show that the rectangular girth antenna with a metal reflecting surface has poor unidirectional radiation performance due to the influence of the parallel plate mode, whereas the rectangular reamed antenna with HIS reflector has better unidirectional radiation performance, Compared with the reflector antenna, not only the operating band before and after the suppression ratio and the normal gain is greatly improved, and the thickness of the antenna antenna is only 31% of the metal reflector. This verifies the superiority of HIS in realizing unidirectional radiation slot antenna and its wide application prospect.