volume | PIER Journals

Abstract

This paper presents a compact four-port ultra-wideband (UWB) MIMO antenna with triple-band-notched characteristics. By introducing two types of resonators with distinct structures on both sides of the feed lines of the radiating elements, the proposed antenna achieves triple-band-notched functionality, thereby suppressing potential interference from WiMAX, C-band, and X-band. Notably, the spiral-shaped resonator simultaneously generates notch bands for both WiMAX and X-band, enabling a single structure to achieve multi-band-notched functionality and thereby enhancing the compactness and notch efficiency of the antenna design. Good agreement is observed between the simulated and measured results, validating the effectiveness and reliability of the proposed design. Across the entire operating band from 2.57 to 11.81 GHz (excluding the notch bands), the antenna exhibits a return loss below -10 dB, inter-port isolation greater than 20 dB, an envelope correlation coefficient (ECC) of less than 0.0095, and a diversity gain (DG) exceeding 9.9995 dB, fully satisfying the requirements of high-performance MIMO systems in terms of channel independence and transmission efficiency. The synergistic integration of multi-notch characteristics and high-performance metrics provides a novel technical approach for UWB-MIMO system design in complex electromagnetic environments.

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Dr. Zixiang Wang

Professor Zhonggen Wang

Professor Wenyan Nie

Professor Han Lin