C波段垂直极化全向天线设计  

Design of C-band vertically polarized omnidirectional antenna

作　　者：赵国栋 周洪澄 朱双双 王豫[1] 严仲明[1] ZHAO Guodong;ZHOU Hongcheng;ZHU Shuangshuang;WANG Yu;YAN Zhongming(School of Electrical Engineering,Southwest Jiaotong University,Chengdu611756,China)

机构地区：[1]西南交通大学电气工程学院,四川成都611756

出　　处：《电子元件与材料》2022年第7期740-744,共5页Electronic Components And Materials

基　　金：国家自然科学基金(51702265)。

摘　　要：针对目前很多C波段全向天线结构复杂、尺寸较大、带宽小的问题,设计了一种完全覆盖C波段的全向垂直极化天线。该天线仅由金属圆盘、金属圆柱套筒、SMA接头三部分组成,金属圆盘的存在相当于在辐射体顶端加载了一个分布电容,等效加大了天线的辐射体长度,因此降低了纵向尺寸,金属圆柱套筒的存在使天线对金属地面的要求降低,因此降低了横向尺寸,最终设计的天线尺寸为12.7 mm×12.7 mm×30.6 mm。通过仿真分析,回波损耗S_(11)≤-10 dB的频带为3.75~8.31 GHz(相对带宽为75.6%),完全覆盖C波段。最终加工实物并测试,测试结果与仿真结果基本一致。Aiming at the problems of many omnidirectional antennas with complex structure,large size and small bandwidth,an omnidirectional vertical polarization antenna that completely covers the C-band was designed.The antenna is only composed of three parts:metal disc,metal cylindrical sleeve,and SMA connector.And the presence of the metal disc is equivalent to loading a distribution capacitor on the top of the radiator,so the length of the radiator of the antenna was increased,and the longitudinal size of the antenna was reduced.The presence of a metal cylindrical sleeve reduced the antenna􀆳s requirements for a metal floor,and thus the lateral size of the antenna was reduced.The size of final designed antenna is 12.7 mm×12.7 mm×30.6 mm.Through simulation analysis,the frequency band of S_(11)≤-10 dB with return loss is 3.75-8.31 GHz(relative bandwidth is 75.6%),which completely covers the C-band.The attenna was fabricated and tested.The test results and the simulation results are consistent.

关 键 词：C波段 垂直极化 全向天线 套筒天线 

分 类 号：TN822.4[电子电信—信息与通信工程]