一种频率选择性高零点可控的宽带滤波贴片天线  

A wideband patch filtenna with high selectivity and controllable null

作　　者：叶亮华 温俊翔 张经纶 刘权达 吴琦韵 YE Lianghua;WEN Junxiang;ZHANG Jinglun;LIU Quanda;WU Qiyun(School of Physics and Optoelectronic Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学物理与光电工程学院,广东广州510006

出　　处：《现代电子技术》2023年第21期1-5,共5页Modern Electronics Technique

基　　金：国家自然科学基金面上项目(62071130)。

摘　　要：文中提出一种频率选择性高、增益稳定、小型化的宽带滤波贴片天线。通过在贴片天线的地板加载U型槽,TM_(01)模式在带内激发,同时,一个辐射零点在高频通带附近产生。为了引入额外的谐振点和辐射零点以增加带宽和实现较高的频率选择性,一对直槽蚀刻在贴片上。最后,为了进一步增强带外抑制水平,U型微带线被加载到贴片天线上。该天线在18.5%(1.91~2.31 GHz)的相对带宽内实现了稳定的增益(6.4±0.6)dBi,实现了频率选择性高的特点,并且带外抑制水平高于14.5 dB。除了带内的宽带特性和带外的高频率选择性,该天线的尺寸为0.54λ_(0)×0.54λ_(0)×0.04λ_(0)。A wideband patch filtenna with high frequency selectivity,stable gain and small size is proposed.By loading a U⁃shaped slot into the ground of a rectangular patch antenna,a TM_(01) mode is created in band.Meanwhile,a radiation null is introduced near the edge of the upper passband.Then a pair of rectangular slots are attached in the rectangular patch,so that extra resonance mode is created to enhance the bandwidth and an additional radiation null is produced near the edge of the lower passband for high selectivity.The U⁃shaped micro strip line is finally inserted in the patch antenna to further enhance the out⁃of⁃band suppression.Over a wide bandwidth of 18.5%(1.91~2.31 GHz),the antenna achieves stable gain of(6.4±0.6)dBi and high selectivity,and its out⁃of⁃band suppression level is higher than 14.5 dB.Besides the wideband operation in band and high selectivity out of band,the designed antenna obtains compact dimension of 0.54λ_(0)×0.54λ_(0)×0.04λ_(0).

关 键 词：滤波天线 贴片天线 宽带天线 辐射零点 宽带特性 带外抑制 

分 类 号：TN82-34[电子电信—信息与通信工程]