title: Broadband frequency-selective spoof surface plasmon polaritons on ultrathin metallic structure.
abstract: We propose an ultrathin metallic structure to produce frequency-selective spoof surface plasmon polaritons (SPPs) in the microwave and terahertz frequencies. Designed on a thin dielectric substrate, the ultrathin metallic structure is composed of two oppositely oriented single-side corrugated strips, which are coupled to two double-side corrugated strips. The structure is fed by a traditional coplanar waveguide (CPW). To make a smooth conversion between the spatial modes in CPW and SPP modes, two transition sections are also designed. We fabricate and measure the frequency-selective spoof SPP structure in microwave frequencies. The measurement results show that the reflection coefficient is less than -10 dB with the transmission loss around 1.5 dB in the selective frequency band from 7 to 10 GHz, which are in good agreements with numerical simulations. The proposed structure can be used as an SPP filter with good performance of low loss, high transmission, and wide bandwidth in the selective frequency band.
authors: State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing 210096, China.
authors: Jia Yuan
authors: JY
authors: Yin
authors: Science and Technology on Antenna and Microwave Laboratory, Xidian University, Xi'an 710071, China.
authors: Jian
authors: J
authors: Ren
authors: State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing 210096, China.
authors: Hao Chi
authors: HC
authors: Zhang
authors: State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing 210096, China.
authors: Bai Cao
authors: BC
authors: Pan
authors: 1] State Key Laboratory of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing 210096, China [2] Cooperative Innovation Center of Terahertz Science, University of Electronic Science and Technology, Chengdu 611731, China.
authors: Tie Jun
authors: TJ
authors: Cui
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