2026-02-20
Synergistically Optimized Vivaldi Array with SSPP Decoupling and Metasurface Gain Enhancement
By
Progress In Electromagnetics Research Letters, Vol. 129, 35-41, 2026
Abstract
This study proposes a two-element Vivaldi antenna array that achieves broadband mutual coupling suppression and gain enhancement. First, by etching multiple spoof surface plasmon polariton (SSPP) slots on the ground plane to suppress surface-wave coupling, the inter-element isolation has increased from 20-31 dB to 20-45 dB, with an improvement of 5-10 dB (a peak of 20 dB) within the operating band of 1.8-4.5 GHz. Then, a quasi-transparent metasurface (MS) is placed above the aperture to enable phase compensation, converting spherical wavefronts to quasi-planar ones and thereby improving the gain of 0.5-2 dBi across the operating band. Finally, the designed Vivaldi antenna array is fabricated and measured, which exhibits S11 < -10 dB (1.3-4.5 GHz), enhanced isolation, and stable gain performance.
Citation
Shuangshuang Zhu, Yang Shao, Zeting Li, Xiaoyuan Wang, Xinlong Bi, Yunjie Song, and Zhi Quan, "Synergistically Optimized Vivaldi Array with SSPP Decoupling and Metasurface Gain Enhancement," Progress In Electromagnetics Research Letters, Vol. 129, 35-41, 2026.
doi:10.2528/PIERL26011004
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