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论文类型：期刊论文

发表时间：2020-04-01

发表刊物：IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION

收录刊物：SCIE

卷号：68

期号：4

页面范围：2975-2983

ISSN号：0018-926X

关键字：Resonators; Frequency selective surfaces; Equivalent circuits; Band-pass filters; Integrated circuit modeling; Frequency response; Resonant frequency; Angular stability; fast roll-off; frequency selective surface (FSS); radome; wideband rejection

摘要：In this article, we proposed an equivalent circuit-based design to synthesizing second-order band-pass frequency selective surfaces (FSSs) with wide out-of-band rejection and fast roll-off characteristics. An equivalent circuit model (ECM) is established in order to depict the desired frequency response. Then, based on the ECM, a generalized composite structure comprised of three FSS arrays separated by two dielectric substrates is proposed. The main advantage of this method is that it allows us to acquire optimized structural parameters according to the desired frequency response. With this method, an FSS based on the proposed composite structure is designed. The designed FSS can provide a second-order pass-band within the stop-band ranging from 1 to 40 GHz and the pass-band is operating at 10 GHz with 12% fractional bandwidth. Meanwhile, the bandwidth of the two transitional bands on both sides of the pass-band is only 0.26 and 0.6 GHz, respectively. Also, the frequency response of the designed FSS is stable at 60 degrees for both TE and TM polarizations. For further verification, an FSS prototype is fabricated and experimentally characterized. Good agreements between the simulated and measured results can be observed.