| 杨福慧,李运胜,印小忠,章芳睿,杜成珠.四元高隔离度二阻带超宽带MIMO槽天线的设计[J].电子测量与仪器学报,2026,40(5):42-49 |
| 四元高隔离度二阻带超宽带MIMO槽天线的设计 |
| Design of a quad-port high-isolation dual-notchedultra-wideband MIMO slot antenna |
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| DOI： |
| 中文关键词: 超宽带 共面波导 陷波 多输入多输出 |
| 英文关键词:UWB coplanar waveguide (CPW) notched-band MIMO |
| 基金项目:国家自然科学基金（62205195）项目资助 |
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| Author | Institution |
| Yang Fuhui | CETC Shanghai Microwave Communication Co., Ltd., Shanghai 201815, China |
| Li Yunsheng | CETC Shanghai Microwave Communication Co., Ltd., Shanghai 201815, China |
| Yin Xiaozhong | CETC Shanghai Microwave Communication Co., Ltd., Shanghai 201815, 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: |
| 针对目前超宽带（ultra-wideband, UWB）多输入多输出（multiple-input multiple-output，MIMO）天线容易受到多个频段的信号干扰，且各端口间隔离较差的问题。提出了一款具有二陷波特性的紧凑型高隔离超宽带四端口MIMO槽天线。天线尺寸为65 mm×65 mm×0.8 mm。天线采用共面波导（coplanar waveguide，CPW）馈电，并加载十字形隔离结构来提高端口间的隔离度，通过在辐射贴片上刻蚀两个C形槽，在3.25~3.85 GHz和4.32~5.69 GHz频带产生陷波，可抑制WiMAX（3.3~3.7 GHz）和WLAN（5.15~5.825 GHz）频段的干扰信号。对天线的各项性能参数进行了深入分析，包括峰值增益、包络相关系数（envelope correlation coefficient，ECC）、分集增益（diversity gain，DG）以及全反射系数（total active reflection coefficient，TARC）。经过实测，该多输入多输出天线的工作频段为2.48~11.2 GHz，隔离度大于20 dB，包络相关系数小于0.07，分集增益大于9.97，分集性能良好。仿真与实测结果表明，该天线在信号传输和抗干扰方面表现优异，各端口间的干扰小，在超宽带MIMO通信系统中，尤其是WiMAX和WLAN陷波频段，具有良好的发展前景，可以满足无线通信的需求。 |
| 英文摘要: |
| Aiming at the issues that current ultra-wideband (UWB) multiple-input multiple-output (MIMO) antennas are prone to signal interference across multiple frequency bands and suffer from poor isolation between ports, a compact high-isolation ultra-wideband four-port MIMO slot antenna with dual-notched characteristics is proposed. The antenna has a dimension of 65 mm×65 mm×0.8 mm. Employing coplanar waveguide (CPW) feeding and integrated with a cross-shaped isolation structure to enhance the isolation between ports, this antenna generates notches in the 3.25~3.85 GHz and 4.32~5.69 GHz frequency bands by etching two C-shaped slots on the radiating patch. These notches can effectively suppress interference signals from the WiMAX (3.3~3.7 GHz) and WLAN (5.15~5.825 GHz) frequency bands. In-depth analyses were carried out on various performance parameters of the antenna, including peak gain, envelope correlation coefficient (ECC), diversity gain (DG), and total active reflection coefficient (TARC). Experimental measurements show that the proposed MIMO antenna operates within the frequency band of 2.48~11.2 GHz, with an isolation of over 20 dB, an ECC of less than 0.07, and a DG of more than 9.97, demonstrating excellent diversity performance. Both simulation and measurement results indicate that the antenna exhibits superior performance in signal transmission and anti-interference capability, with minimal interference between ports. It holds promising application prospects in ultra-wideband MIMO communication systems, particularly in the WiMAX and WLAN notched frequency bands, and can meet the requirements of wireless communication systems. |
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