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设计了由两种不同开口谐振环结构组成的双频带相位梯度超表面。超表面中两种结构单元周期交错排列,在两个频点引入附加平行波矢量调控电磁波波前,获得低平板反射率及后向雷达散射截面积(RCS)缩减。仿真与实验均表明,该设计思路和方法行之有效,在7.8 GHz和9.4 GHz两个设计频点,将垂直入射波耦合成伪表面波,偏离法线-30°~+30°的单站后向RCS缩减分别为10.3 d B和10.4 d B。由于其设计的灵活性,该超表面波有望在天线、隐身领域具有潜在的应用价值。
A dual-band phase gradient superficial surface composed of two different ring resonator structures is designed. The two structural units in the superficial surface are staggered in period, and additional parallel wave vector-controlled electromagnetic wavefront is introduced at two frequency points to obtain low slab reflectivity and backward radar cross section (RCS) reduction. Both simulation and experiment show that this design method and method are effective. In the two design frequencies of 7.8 GHz and 9.4 GHz, the vertical incident wave is coupled into a pseudo-surface wave and the single station deviates from the normal line from -30 ° to + 30 ° After the RCS reduction of 10.3 d B and 10.4 d B. Because of its design flexibility, the SAW is expected to have potential applications in the field of antenna and stealth.