为扩大带宽的同时提高增益,设计了一种由四个矩形组合构成的微带贴片天线,该天线达到了在多波段的情况下兼具超高增益的电特性。天线工作在2.57-2.8 GHz,4.47-4.7 GHz,5.26-5.45 GHz,6.1-6.2 GHz,6.7-6.9GHz频带内,带内回波损耗均小于–10 d B,可应用于S波段、C波段、Wi MAX（2.3-3.5 GHz）和Wi Fi（5.25-5.35 GHz）频段,最高增益达到9.45 d B,比传统微带天线增益高了约5 d B。
Double-screen frequency-selective surfaces (FSSs) can bring about a better flattened effect and a rapidly declining edge. They are therefore an effective means to achieve outer-zone stealth of the radar cabin to detect radar waves. In this article, a double-screen wide-bandpass FSS structure is designed and the transmission characteristics of the units under alignment and non-alignment are simulated by means of the spectral domain approach. Meanwhile, the experimental parts fabricated by vacuum evaporation and lithography are tested in a microwave chamber. The results show that the aligned unit structure has good incident angle stability and can achieve high transmittance when the bandwidth is 3.3 GHz, and the transmission loss is less than 1 dB. When the units have a non-aligned structure, the bandwidth decreases and transmission loss increases with increasing incident angle.
