scholarly journals Spoof Surface Plasmon Polaritons Developed from SIW Using Ring Slots and Vias

Electronics ◽  
2021 ◽  
Vol 10 (16) ◽  
pp. 1978
Author(s):  
Longfei Tan ◽  
Kaida Xu ◽  
Yiqun Liu ◽  
Yingjiang Guo ◽  
Jianlei Cui
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Microstrip Line ◽  
Mode Conversion ◽  
Cutoff Frequency ◽  
Center Frequency ◽  
Small Ring ◽  
Adjustable Center ◽  
Plasmon Polaritons ◽  
Spoof Surface Plasmon Polaritons

A new type of spoof surface plasmon polaritons (SSPPs) developed from conventional substrate integrated waveguide (SIW) using ring slots and vias is proposed in this paper. The asymptotic frequency and lower cutoff frequency of the SSPP structure can be easily tuned by changing the width of SIW walls and radius of the ring slot, respectively. A trapezoidal microstrip line and a small ring slot are used for the efficient mode conversion to smoothly transit from microstrip line to the proposed SSPP structure. The presented SSPPs have a flat bandpass filtering response with adjustable center frequency and bandwidth. In order to better verify the transmission and cutoff characteristics, two bandpass filters using the proposed SSPPs with relative bandwidths of 61.7% and 76.4%, respectively, are fabricated and measured. Good agreement between the simulations and measurements verifies the proposed design idea.

Multi-band rejection filters based on spoof surface plasmon polaritons and folded split-ring resonators

2019 ◽  
Vol 11 (08) ◽  
pp. 774-781 ◽  
Author(s):  
Luping Li ◽  
Lijuan Dong ◽  
Peng Chen ◽  
Kai Yang
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Cutoff Frequency ◽  
Ring Resonators ◽  
Center Frequency ◽  
Pass Band ◽  
Rejection Filter ◽  
Low Pass ◽  
Plasmon Polaritons ◽  
Spoof Surface Plasmon Polaritons

AbstractA dualband rejection filter and a triband rejection filter are proposed in this letter, both of which are implemented by cascading spoof surface plasmon polaritons (SSPPs) of the same structure but with diverse rejection bands. Compared with traditional ones, the proposed filters provide more compact structures, wider rejection bands, and better independent tunability. In the proposed filters, the rejection bandwidth, the center frequency of the rejection band and the filter's cutoff frequency can be adjusted independently. And the different rejection bands in the same filter also can be independently controlled. Agreements between the dispersion of SSPP units and the S21 of filters are also presented. Measurement results demonstrate that both filters load multiple rejection bands on the 27.7 GHz wide low-pass band and all the rejection bands locate in Ku and K bands. The average rejection bandwidth and the average rejection depth of the two filters are 1.49 GHz and 42.1 dB, respectively.

scholarly journals Equivalent circuit parameters of planar transmission lines with spoof surface plasmon polaritons and its application in high density circuits

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Chia Ho Wu ◽  
Linfang Shen ◽  
Hang Zhang ◽  
Jinhua Yan ◽  
Da Jun Hou ◽  
...  
Keyword(s):  
Equivalent Circuit ◽  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Transmission Lines ◽  
High Speed ◽  
Microstrip Line ◽  
Characteristic Impedance ◽  
Equivalent Circuit Parameters ◽  
Plasmon Polaritons ◽  
Spoof Surface Plasmon Polaritons

AbstractIn this paper, the characteristics of a class of transmission lines which support spoof surface plasmon polaritons are investigated both numerically and experimentally. In order to provide the characteristic impedance of spoof surface plasmon polaritons for PCB designers, the equivalent circuit parameters of the microstrip line periodically structured on subwavelength scale are extracted with the numerical method. It is found that the equivalent circuit parameters significantly vary with frequency when the subwavelength periodic structure is introduced into the edge of the conventional microstrip line. The results of time-domain measurements show that spoof surface plasmon polaritons have remarkable advantage over conventional microstrip lines and can be directly used in actual high-speed circuits, which is helpful for eliminating the doubts whether the metamaterials can be directly used in actual circuits.

scholarly journals A Spoof Surface Plasmon Polaritons (SSPPs) Based Dual-Band-Rejection Filter with Wide Rejection Bandwidth

Sensors ◽  
2020 ◽  
Vol 20 (24) ◽  
pp. 7311
Author(s):  
Ehsan Farokhipour ◽  
Mohammad Mehrabi ◽  
Nader Komjani ◽  
Can Ding
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Mode Conversion ◽  
Ring Resonators ◽  
Dual Band ◽  
Total Size ◽  
Filter Performance ◽  
Rejection Filter ◽  
Plasmon Polaritons ◽  
Spoof Surface Plasmon Polaritons

This paper presents a novel single-layer dual band-rejection-filter based on Spoof Surface Plasmon Polaritons (SSPPs). The filter consists of an SSPP-based transmission line, as well as six coupled circular ring resonators (CCRRs) etched among ground planes of the center corrugated strip. These resonators are excited by electric-field of the SSPP structure. The added ground on both sides of the strip yields tighter electromagnetic fields and improves the filter performance at lower frequencies. By removing flaring ground in comparison to prevalent SSPP-based constructions, the total size of the filter is significantly decreased, and mode conversion efficiency at the transition from co-planar waveguide (CPW) to the SSPP line is increased. The proposed filter possesses tunable rejection bandwidth, wide stop bands, and a variety of different parameters to adjust the forbidden bands and the filter’s cut-off frequency. To demonstrate the filter tunability, the effect of different elements like number (n), width (WR), radius (RR) of CCRRs, and their distance to the SSPP line (yR) are surveyed. Two forbidden bands, located in the X and K bands, are 8.6–11.2 GHz and 20–21.8 GHz. As the proof-of-concept, the proposed filter was fabricated, and a good agreement between the simulation and experiment results was achieved.

scholarly journals Tilted-Beam Antenna Based on SSPPs-TL with Stable Gain

Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 3288
Author(s):  
Dujuan Wei ◽  
Youlin Geng ◽  
Pengquan Zhang ◽  
Zhonghai Zhang ◽  
Chuan Yin
Keyword(s):  
Surface Plasmon ◽  
Slow Wave ◽  
Surface Plasmon Polaritons ◽  
Transmission Lines ◽  
Design Theory ◽  
Metal Plate ◽  
Wave Radiation ◽  
Gain Bandwidth ◽  
Plasmon Polaritons ◽  
Spoof Surface Plasmon Polaritons

In this paper, a titled-beam antenna based on spoof surface plasmon polaritons (SSPPs) transmission lines (TLs) is proposed. The parallel SSPPs-TL is a slow-wave TL, which is able to limit waves in the TL strictly. By periodically introducing a set of tapered stubs along the SSPPs-TL, the backward endfire beams are formed by the surface waves in the slow-wave radiation region. Then, through the placement of a big metal plate below the endfire antenna, the backward endfire beams are tilted, and the tilted angle of the beams are steered by the distance of the metal plate and antenna. Over the band of 5.7 GHz~7.0 GHz, the tilted antenna performs constant shapes of radiation patterns. The gain keeps stable at around 12 dBi and the 1-dB gain bandwidth is 20%. The measured results of the fabricated prototypes confirm the design theory and simulated results.

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