一种用于局部放电检测的超宽带环形-单极子天线  

An ultra-wideband loop-monopole antenna for partial discharge detection

作　　者：张殷 罗兵 李国伟 唐琪 张豪峰 ZHANG Yin;LUO Bing;LI Guowei;TANG Qi;ZHANG Haofeng(Foshan Power Supply Bureau of Guangdong Power Grid Co.,Ltd.,Foshan528000,Guangdong Province,China;Southern Power Grid Scientific Research Institute Co.,Ltd.,Guangzhou510663,China)

机构地区：[1]广东电网有限责任公司佛山供电局,广东佛山528000 [2]南方电网科学研究院有限责任公司,广东广州510663

出　　处：《电子元件与材料》2024年第8期1017-1023,共7页Electronic Components And Materials

基　　金：广东电网有限责任公司科技项目(GDKJXM20222587);国家自然科学基金联合基金项目(U23B20132)。

摘　　要：为提高电气设备局部放电检测准确度和灵敏度,提出一种超宽带环形-单极子天线。该天线主要由环形天线、类三角形单极子、金属枝节和金属地板构成。其中,类三角形单极子嵌入在环形天线内部,并通过金属枝节与环形天线连接,从而引入电磁耦合和产生新的谐振模式,改善天线阻抗匹配,扩展天线工作带宽,实现超宽带阻抗匹配和辐射特性。研究结果表明,天线在0.29~3.10 GHz频段的仿真反射系数低于-10 dB,最大仿真增益为8.8 dBi,在超宽频段内实现了良好的阻抗匹配和辐射特性。测试结果和仿真结果吻合良好,天线在0.29~3.16 GHz频段的测试反射系数低于-10 dB,最大测试增益达到9.3 dBi,适用于电气设备局部放电检测。An ultra-wideband loop-monopole antenna was proposed to improve the accuracy and sensitivity of the partial discharge detection in the electrical equipment.The proposed antenna was mainly composed of loop antennas,quasi-triangular monopoles,metal branches and a metal ground plane.The monopoles were embedded in the loop antennas,and connected to the loop antennas by the metal branches,so as to introduce electromagnetic coupling and generate additional resonant modes to improve the impedance matching and bandwidth,thus achieving good impedance matching and radiation performance over an ultra-wide frequency band.The results show that the simulated reflection coefficient of the antenna is less than-10 dB at 0.29-3.10 GHz band and the simulated maximum gain is 8.8 dBi.This result indicates that the good impedance matching and radiation performance over an ultra-wide frequency band is achieved.The measured results are in good agreement with the simulation.The measured reflection coefficient of the antenna is less than-10 dB at 0.29-3.16 GHz band and the measured maximum gain is 9.3 dBi,which makes it suitable for the partial discharge detection in the electrical equipment.

关 键 词：环形天线 单极子天线 超宽带天线 局部放电检测 

分 类 号：TN82[电子电信—信息与通信工程]