A Spoof Surface Plasmon Polaritons Filter with Controllable Negative Slope Equalization Based on Surface Resistance

Authors

  • Chenhao Wang Xi’an Key Laboratory of Intelligence Xi’an Technological University, Xi’an 710021, China
  • Junjie Dong Xi’an Key Laboratory of Intelligence Xi’an Technological University, Xi’an 710021, China
  • Xiaomin Shi Department of Communication Engineering Xi’an Shiyou University, Xi’an 710065, China
  • Hailong Yang School of Electronic Engineering Xi’an University of Posts and Telecommunications, Xi’an 710100, China

DOI:

https://doi.org/10.13052/2024.ACES.J.390608

Keywords:

equalization, indium tin oxide, low-pass filter, spoof surface plasmon polaritons

Abstract

This paper presents a novel spoof surface plasmon polariton (SSPP) filter integrated with controllable negative slope equalization. Different from traditional microwave filters, two microwave functions - amplitude compensation and interference suppression - are integrated into one device by depositing a lossy indium tin oxide (ITO) film on the rectangular corrugated stub of the SSPP unit. The key point of negative slope equalization benefits from the surface resistance of the ITO film, and the circuit model and behavior are analyzed in detail. Based on the principle, a prototype of a SSPP filter operating from S to C band is designed and fabricated. The measurement results show that the attenuation in the passband increases almost linearly from 3.5 GHz (−4.8 dB) to 6.9 GHz (−15.4 dB), indicating that −10.6 dB equalization is achieved. The improved S21 is attributed to the good impedance matching by sputtering the ITO film on the rectangular metal strip rather than the central strip. Due to the natural low-pass property of SSPPs, the high-order parasitic band is suppressed above the cut-off frequency of 8.5 GHz. The analyses, simulations and measurements show that the proposed SSPP filter is provided with an additional ability to compensate for positive amplitude fluctuation in wideband antennas.

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Author Biographies

Chenhao Wang, Xi’an Key Laboratory of Intelligence Xi’an Technological University, Xi’an 710021, China

Chenhao Wang was born in Shaanxi province, China, in 1988. He received the B.S., M.S. and Ph.D. degrees in electromagnetic field and microwave technology from Xi’an University of Technology, Xi’an, China, in 2011, 2014 and 2022, respectively. He currently works at Xi’an Technological University, Xi’an, China. His current research interests include spoof surface plasmon polaritons and novel metamaterial functional devices, including theoretical design and experimental realization.

Junjie Dong, Xi’an Key Laboratory of Intelligence Xi’an Technological University, Xi’an 710021, China

Junjie Dong received the B.S. degree from China West Normal University, Nanchong, China, in 2021. He is currently pursuing the M.S. degree at Xi’an Technological University, Xi’an, China. His research interests include metamaterial and microwave filters.

Xiaomin Shi, Department of Communication Engineering Xi’an Shiyou University, Xi’an 710065, China

Xiaomin Shi received the B.S., M.S. and Ph.D. degrees in electromagnetic field and microwave technology from Xi’an University of Technology, Xi’an, China, in 2006, 2010 and 2017, respectively. She joined the Department of Communication Engineering, Xi’an Shiyou University, in 2017. Her current research interests include microwave circuits and graphene-based devices.

Hailong Yang, School of Electronic Engineering Xi’an University of Posts and Telecommunications, Xi’an 710100, China

Hailong Yang received the B.S. in communicating engineering from Heze University, Heze, China, in 2012, and M.S and Ph.D. degrees in communicating engineering from Xi’an University of Technology, Xi’an, China, in 2015 and 2019. He joined the faculty of Electronic Engineering Department, Xi’an University of Posts and Telecommunications, in 2019. His research interests include wave propagation and antenna design.

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Published

2024-06-30

How to Cite

[1]
C. . Wang, J. . Dong, X. . Shi, and H. . Yang, “A Spoof Surface Plasmon Polaritons Filter with Controllable Negative Slope Equalization Based on Surface Resistance”, ACES Journal, vol. 39, no. 06, pp. 542–547, Jun. 2024.

Issue

2024: Vol 39 Iss 6

Section

General Submission

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