基于镍人工表面等离子激元的W波段波导终端

A W-band waveguide termination based on nickel SSPPs

摘要:

对镍波导在亚毫米波频段的电磁损耗进行测量，并设计一款基于镍人工表面等离激元(SSPPs)的波导终端，用于多端口波导器件测量和功分器端口隔离。该波导采用简单紧凑的反对称矩形探针结构将电磁能量从波导高效耦合至微带，随后传输至梳状的SSPPs终端。其中，微带电路和SSPPs电路制作在一个石英衬底上，金属电路为电镀的金属镍。利用SSPPs的带阻和金属镍的高频高损耗特性，实现了电磁能量的衰减和吸收。在W波段(75~110 GHz)对所提出的镍SSPPs波导终端进行实验验证。实验结果表明，在整个W波段，该波导终端的回波损耗超过15 dB，对应的电磁吸收率超过96.8%。

Abstract:

The electromagnetic losses of nickel waveguides in the submillimeter wave frequency band are measured, and a waveguide terminator based on nickel Spoof Surface Plasmon Polaritons(SSPPs) is designed for multi-port waveguide device measurements and power divider port isolation. The waveguide employs a simple and compact antisymmetric rectangular probe structure to efficiently couple electromagnetic energy from the waveguide to a microstrip, which is then transmitted to a comb-like SSPPs terminator. The microstrip circuit and SSPPs circuit are fabricated on a quartz substrate, with the metal circuit being electroplated metal nickel. Utilizing the band-stop characteristics of SSPPs and the high-frequency high-loss properties of metal nickel, the attenuation and absorption of electromagnetic energy are achieved. The proposed nickel SSPPs waveguide terminator is experimentally validated in the W-band(75~110 GHz). The experimental results indicate that the Return Loss of this waveguide terminator exceeds 15 dB across the entire W-band, with a corresponding electromagnetic absorption rate of over 96.8%.