CST – Computer Simulation Technology

Title:
Broadband Frequency-Selective Spoof Surface Plasmon Polaritons on Ultrathin Metallic Structure
Author(s):
Jia Yuan Yin, Jian Ren, Hao Chi Zhang, Bai Cao Pan, Tie Jun Cui
Source:
SCIENTIFIC REPORTS
Vol./Issue/Date:
15 October 2014
Year:
2014
Page(s):
1 - 5
Keywords:
Engineering, Physics
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.
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