高选择性透射的双吸收带FSR设计

A Dual-band Absorption FSR with High Selective Transmission

本文提出了一种带有高选择性透射窗口的双吸收带的频率选择吸波器。该吸波器具有一个可近乎透明传输的通带,并且在这个透射窗口两边分别具有一个高效吸收带,同时对不同非损耗层的设计,该透射窗口可以具备高选择性。此吸波器采取双层平面结构,包括上层的电阻性损耗层和下层的非损耗的带通频率选择表面层,两者的结合就实现了吸波-透射-吸波的功能。仿真结果表明,该吸波器透射窗口在4.35 GHz频点附近,最低插入损耗仅为0.7 dB。反射率低于-10 dB的频带范围为2.3-7.7 GHz,相对带宽为102%。低频侧和高频侧的相对吸收带宽分别为58%和50%,最高吸收率分别达到了99%和98%。

A frequency selective absorber with double absorption band and high selectivity transmission window is presented in this paper.The absorber has a passband which can transmit almost transparently,and there is an absorption band on each side of the transmission window.Meanwhile,the transmission window can be highly selective for the design of different lossless layers.The absorber adopts a two-layer plane structure,including the resistive lossy layer on the upper layer and the lossless passband frequency selection surface layer on the lower layer.The combination of the two layers can realize the function of absorption,transmission and absorption band.The simulation results show that the transmission window of the absorber is near the 4.35 GHz,and the minimum insertion loss is only 0.7 dB.The frequency band range with reflectivity lower than-10 dB is 2.3-7.7 GHz and the relative bandwidth is 102%.The relative absorption bandwidth of low frequency side and high frequency side is 58%and 50%respectively,and the highest absorption rate is 99%and 98%respectively.