Laser & Optoelectronics Progress, Volume. 57, Issue 17, 172401(2020)
Design of Multiband Filter Based on Spoof Surface Plasmon Polaritons
In this paper, a multiband filter with notch function based on spoof surface plasmon polaritons (SSPPs) is designed. First, a gradualy slot unit structure is introduced into the waveguide structure to obtain better dispersion characteristics, and a low-pass filter with a cut-off frequency of 7.1 GHz is built on this basis. Then, the multiband filter is formed though exciting the stuffing wave by loading an E-shaped resonator. When the odd and even resonance modes are excited at the same time, two low-pass filters with insertion loss of 3 dB and cut-off frequency of 2.83 GHz and two band-pass filters with insertion loss of 3 dB and bandwidth of 2.94-4.37 GHz and 4.40-7.10 GHz are formed. When the resonance degradation disappears in even mode, a low-pass filter with 3 dB insertion loss and 2.83 GHz cut-pass frequency, and a band-pass filter with insertion loss of 3 dB and bandwidth of 2.94-7.10 GHz are formed. It is proved that the structure of multiband filter based on E-shaped resonator is of great significance to the development of SSPPs in microwave field in the microwave field.
Get Citation
Copy Citation Text
Dengwei Zhu, Ruimin Zeng, Zetian Tang, Zhao Ding, Chen Yang. Design of Multiband Filter Based on Spoof Surface Plasmon Polaritons[J]. Laser & Optoelectronics Progress, 2020, 57(17): 172401
Category: Optics at Surfaces
Received: Nov. 13, 2019
Accepted: Dec. 31, 2019
Published Online: Sep. 1, 2020
The Author Email: Zhu Dengwei (strayer2018@163.com), Yang Chen (eliot.c.yang@163.com)