Spoof Surface Plasmon Polaritons Based Reconfigurable Band-Pass Filter
Spoof Surface Plasmon Polaritons Based Reconfigurable Band-Pass Filter
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DOI：
10.1109/lpt.2018.2889007
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发表时间：
2019-02-01
影响因子：
2.6
通讯作者：
Pathak, Nagendra Prasad
中科院分区：
文献类型：
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作者：
Jaiswal, Rahul Kumar;Pandit, Nidhi;Pathak, Nagendra Prasad
本文报道了在太赫兹/微波频率下利用欺骗表面等离子体激元实现带宽可重构带通滤波器的设计和分析。所设计的滤波器由一个假的SPP T形谐振器组成，其中使用了可变电容器件(在太赫兹频率范围内具有截止频率)进行了调谐。为了更好地理解这一现象，我们进行了奇偶模式分析。通过Co-EM模拟验证了所提出的SSPP结构在太赫兹频率下的可变带宽概念。为了对所提出的方法进行实验验证，该滤波器被设计在微波频率下，在60密耳(1.52 mm)厚的微波叠层上开发，并使用Keysight field-Fox分析仪N9918A进行了表征。在太赫兹和微波频率范围内，所设计的滤波器具有3分贝带宽可重构性，20 GHz(0.41~0.43太赫兹)和300 MHz(100~400 MHz)，插入损耗分别接近3分贝和1.7分贝~3.2分贝。所提出的可重构带通滤波器将在等离子体电路和系统的设计和开发中发挥重要作用。
This letter reports the design and analysis of the bandwidth (BW) reconfigurable band-pass filter using spoof surface plasmon polaritons at THz/microwave frequency. The designed filter consists of a spoof SPP T-shape resonator in which tuning has been introduced using variable capacitor device (having a cutoff frequency in THz regimes). Even and odd mode analysis has been carried out for a better understanding of the phenomenon. The proposed concept of variable bandwidth at a THz frequency in the SSPP structure has been demonstrated through Co-EM simulation. For the experimental validation of the proposed approach, the filter has been designed at microwave frequency, developed on a 60 mil (1.52 mm) thick microwave laminate, and characterized using a Keysight Field-Fox analyzer N9918A. In THz and microwave frequency regime, the designed filter has 3-dB BW reconfigurability of 20 GHz (0.41-0.43 THz) and 300 MHz (100-400 MHz) with the insertion loss of similar to 3 dB and similar to 1.7 dB-3.2 dB, respectively. The proposed reconfigurable bandpass filter will have an important role in the design and development of plasmonic circuits and systems.