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提出了一种具有高选择性和三阶带通响应的三维(3-D)频率选择表面(Frequency Selective Surface, FSS)。该3-D FSS的单元结构由3个贴片金属方筒和3个介质方筒嵌套而成，产生3个传播路径。2个方形同轴路径提供方形槽谐振，产生2个传输极点，平行板路径提供半波长谐振，产生另一个传输极点，由此形成三阶通带。由于不同传播路径出射端处电场矢量相位反相，产生了3个传输零点，提升了频率选择性。通过场理论法和等效电路法分析了该3-D FSS的工作原理。加工出该3-D FSS实物，并进行了实验测试。可以发现，该3-D FSS能够实现平坦的通带、高选择性、良好的角度稳定性、双极化和较小的电尺寸。
Abstract：A three-dimensional(3-D) Frequency Selective Surface(FSS) with high selectivity and third-order bandpass response is proposed.The unit cell of the proposed 3-D FSS is composed of three square metallic tubes and three square dielectric tubes to generate three propagation paths.Two square coaxial paths provide square slot resonance, generating two transmission poles, and one parallel plate path provides half-wavelength resonance, generating another transmission pole, thus forming a third-order passband.Due to the inverse phase of the electric field vector at the exit of different propagation paths, three transmission zeros are generated, which improves the frequency selectivity.The working principle of the 3-D FSS is analyzed by field theory method and equivalent circuit method.Finally, a prototype of the proposed 3-D FSS is fabricated and measured.It can be found that the proposed 3-D FSS can achieve flat passband, high selectivity, good angle stability, dual polarization and compact electrical size.
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基本信息:
中图分类号:TN713
引用信息:
[1]钱建波,朱建平,董进.一种高选择性三阶带通三维频率选择表面[J].无线电工程,2022,52(04):645-650.
基金信息:
江苏省“333工程”科研资助项目(BRA2018315); 射频集成电路与系统创新团队(JSEIYC2020002)~~