A wide-angle broadband converter: from odd-mode spoof surface plasmon polaritons to spatial waves

A wide-angle broadband converter: from odd-mode spoof surface plasmon polaritons to spatial waves

A wide-angle broadband converter from odd-mode spoof surface plasmon polaritons (SPPs) to spatial waves is proposed using spatially gradient Vivaldi-shaped flaring structure. We first show the dispersion, Eigen mode, and effective circuit topology of the designed SPP structure and show that it can s...

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Bibliographic Details
Main Authors: Zhang, Hao Chi, Liu, Lin, He, Hang Pei, Lu, Jiayuan, Zhang, Le Peng, Xu, Jie, Liu, Liangliang, Gao, Fei, Cui, Tie Jun, Wang, Qi Jie, Luo, Yu
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2024
Subjects:
Physics
Broadband
Converter
Odd mode
Spatial wave
Surface plasmon polaritons
Wide angle
Online Access:https://hdl.handle.net/10356/179129
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Institution: Nanyang Technological University
Language: English
Description
Summary:A wide-angle broadband converter from odd-mode spoof surface plasmon polaritons (SPPs) to spatial waves is proposed using spatially gradient Vivaldi-shaped flaring structure. We first show the dispersion, Eigen mode, and effective circuit topology of the designed SPP structure and show that it can support a propagating odd mode. A conversion structure between odd-mode spoof SPPs and spatial mode has been designed to realize smooth impedance and wavenumber transition. Through the full-wave simulation method, we obtained the optimized geometric parameters, from which we fabricate the converter using the print circuit board technology. The measured results from both far field and near field show that the proposed structure has successfully excited odd-mode spoof SPPs coming from an extremely wide-angle spatial radiation. The allowed azimuthal and pitched angle ranges are larger than 72°.

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