| 杨永康,杨福慧,章芳睿,杜成珠.基于特征模理论的超宽带双陷波MIMO天线的研究[J].电子测量与仪器学报,2025,39(11):133-141 |
| 基于特征模理论的超宽带双陷波MIMO天线的研究 |
| Research on ultra-wide band dual notch MIMO antennabased on characteristic mode theory |
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| DOI： |
| 中文关键词: 超宽带 MIMO 特征模 陷波 高隔离度 |
| 英文关键词:ultra-wide band (UWB) MIMO characteristic mode theory (CMT) notch high isolation |
| 基金项目:国家自然科学基金（62202286）项目资助 |
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| Author | Institution |
| Yang Yongkang | College of Electronics and Information Engineering, Shanghai University of Electric Power, Shanghai
200082, China |
| Yang Fuhui | CETC Shanghai Microwave Communication Co., Ltd., Shanghai 201800, China |
| Zhang Fangrui | College of Electronics and Information Engineering, Shanghai University of Electric Power, Shanghai
200082, China |
| Du Chengzhu | College of Electronics and Information Engineering, Shanghai University of Electric Power, Shanghai
200082, China |
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| 中文摘要: |
| 随着无线通信技术的飞速发展，超宽带(ultra-wide band, UWB)通信具备高传输速率、大容量等优势，多输入多输出（multiple-input multiple-output，MIMO）技术在提升通信系统性能方面起着关键作用，提出了一种微带线馈电超宽带双陷波MIMO天线。通过在圆形辐射贴片上刻蚀半椭圆形缺口实现超宽带特性，在辐射贴片上刻蚀U型槽使天线抑制WiFi 5G频段(5.125~5.925 GHz)的干扰，在馈线上刻蚀倒U型槽来抑制Ku标准频段下行(12.2~12.75 GHz)的干扰，并用特征模理论进行验证分析。该天线由两个单元天线平行放置，单元天线的地板进行相连，通过L型隔离枝节有效提高天线隔离度(｜S21｜)。天线尺寸为60 mm×30 mm×1 mm。实测结果表明，天线的-10 dB工作带宽为3.88~20.49 GHz，相对带宽为136.3%，MIMO天线在工作频段内的端口隔离度均大于20 dB，最大实测增益为6.1 dB，包络相关系数（envelope correlation coefficient，ECC）小于0.02，分集增益（diversity gain，DG）大于9.99，分集性能良好，并且具有良好的辐射特性，在UWB-MIMO系统中具有广泛的应用前景，有助于推动无线通信领域的发展与创新。 |
| 英文摘要: |
| With the rapid development of wireless communication technology, ultra-wide band (UWB) communication offers advantages such as high transmission rates and large capacity. multiple-input multiple-output (MIMO) technology plays a crucial role in enhancing the performance of communication systems. This paper proposes a microstrip-fed ultra-wideband dual-notch MIMO antenna. By etching semi-elliptical notches on the circular radiating patch, ultra-wideband characteristics are achieved. A U-shaped slot is etched on the radiating patch to suppress interference from the 5G WiFi band (5.125~5.925 GHz), while an inverted U-shaped slot is etched on the feed line to reject interference from the Ku-band downlink standard frequency range (12.2~12.75 GHz). The design is validated and analyzed using characteristic mode theory The antenna consists of two unit antennas placed in parallel. The unit antennas are connected through a shared ground plane, and an L-shaped isolation stub is employed to effectively improve the isolation (｜S21｜) between the antennas. The antenna dimensions are 60 mm×30 mm×1 mm. Measurement results demonstrate that the antenna achieves an impressive -10 dB operating bandwidth of 3.88~20.49 GHz with a remarkable fractional bandwidth of 136.3%. The MIMO configuration exhibits excellent performance characteristics, including: port isolation greater than 20 dB across the entire operating band, a peak measured gain of 6.1 dB, envelope correlation coefficient (ECC) below 0.02, and diversity gain (DG) exceeding 9.99. These parameters confirm superior diversity performance and radiation characteristics. The proposed design shows significant potential for UWB-MIMO system applications, offering promising prospects for advancing wireless communication technologies and fostering innovation in this field. |
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