宽带差分微带天线及其阵列设计  

Wideband Differential-fed Microstrip Antenna and Its Array Design

作　　者：郭胜杰 陈斯文 梁志伟[1] GUO Shengjie;CHEN Siwen;LIANG Zhiwei(Nanjing Research Institute of Electronics Technology,Nanjing Jiangsu 210039,China;The Third Military Representative Office of Electronic Equipment Resident in Nanjing Area,Nanjing Jiangsu 210039,China)

机构地区：[1]南京电子技术研究所,江苏南京210039 [2]海军装备部驻南京地区第三军事代表室,江苏南京210039

出　　处：《现代雷达》2023年第9期23-26,共4页Modern Radar

摘　　要：提出了一种新型的差分微带线馈电式宽带微带天线单元及阵列。首先,结合微带天线的场分布特点,提出了一种终端短路的平行差分微带线结构,实现了对其TM_(01)主模的有效激励;所提出的微带天线的辐射层与馈线层共用金属地,在扩展天线带宽的同时,有效降低了天线的剖面高度;然后,通过在馈线上加载U型槽,改善其带内匹配特性,将天线的阻抗带宽(电压驻波比≤2)从7.6%提高到了15.9%;最后,基于微带馈线的周期性场分布特点,仅通过对馈电结构进行长度扩展,无需额外的功分结构,便实现了一款1×2的差分微带天线阵列,并对其性能进行了仿真与分析。In this paper,a new microstrip-line structure is proposed for the wideband differential-fed microstrip antenna and its array.Firstly,combining with the field distribution of the microstrip antenna,a new short-circuited parallel differential microstrip-line structure is proposed to excite its TM_(01) mode.The radiation layer and feeder layer of the proposed antenna share a ground plane,which effectively reduces the profile height of the antenna while expanding its impedance bandwidth.Then by etching a U-shaped slot in the feeding line to improve its in-band matching characteristics,the impedance bandwidth(voltage standing wave ratio(VSWR)≤2) of the antenna is dramatically broadened to 15.9% from 7.6%.Finally,Based on the periodic field distribution of the microstrip feeding line,a 1×2 differential microstrip antenna array is realized based on the new feeding structure without adding a new power divider.The performance of the proposed antenna array is simulated and studied.

关 键 词：宽带 微带馈电 U型槽 微带天线 差分阵列 

分 类 号：TN982[电子电信—信息与通信工程]