一种双“L”形探针馈电宽带微带天线  

A Broadband Microstrip Antenna Fed by Ribbon Double L-shaped Probes

作　　者：宋祖勋[1] 韦杜娟 张朋[1] 

机构地区：[1]西北工业大学365所,西安710065 [2]西北工业大学,西安710072

出　　处：《遥测遥控》2013年第6期22-27,32,共7页Journal of Telemetry,Tracking and Command

摘　　要：提出一种S波段带状双"L"形探针馈电的宽带微带天线。提出的双"L"形探针采用倒置容性馈电结构,探针结构相同,水平臂均为带状,位置对称。通过基于左右手复合传输线理论的馈电网络向天线提供幅度相同、相位相差180°的激励信号。计算结果表明,设计的天线在S11<-15dB时,阻抗带宽可达到47.73%(1.80GHz^2.85GHz),E面主极化辐射方向图对称,H面交叉极化小于-40dB。A broadband microstrip antenna fed by ribbon double L-shaped probes in S-band is proposed in this paper. The identical probes on symmetrical positions are utilized to feed the proposed antenna in reversed capacitive feed structure. The excitation signals are provided by the feed network based on CLRH-TL theory that have the same amplitudes and contrary phases.The results show that the impedance bandwidth of the proposed antenna is up to 47. 73%( 1. 80GHz ~ 2. 85GHz) when S11is less than- 15dB,the main beam of E-plane in radiation patterns is symmetrical,and the H-plane cross polarization is less than- 40dB.

关 键 词：宽带微带天线 双“L”形探针 CLRH-TL 馈电网络 

分 类 号：TN713.5[电子电信—电路与系统]