volume | PIER Journals

Abstract

This paper presents a low-coupling ultra-wideband (UWB) antenna based on a metamaterial structure. The proposed metamaterial exhibits single-negative characteristics with a negative permittivity (ε) in the 3.3-4 GHz and 6.4-10.1 GHz bands, effectively reducing inter-element coupling. Through simulation and experimental measurement, the antenna is demonstrated to operate from 3.1 to 11.4 GHz, achieving an absolute bandwidth of 11.31 GHz and a relative bandwidth of 114.5% (S₁₁ < -10 dB). By integrating the metamaterial to suppress inter-element coupling, the antenna maintains low mutual coupling across the entire operating band (S₂₁ < -20  dB), with an envelope correlation coefficient (ECC) below 0.0045 and a radiation efficiency ranging from 70% to 95%. These outstanding performance metrics render the antenna well-suited for indoor high-precision positioning scenarios, providing stable and high-speed data transmission capabilities.

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Dr. Xuemei Zheng

Mr. Shengbang Ma

Mr. Linfei Yue