一种微带线-槽线功分器馈电的超宽带印制偶极子天线

An Ultra-wideband Printed Dipole Antenna Fed by Microstrip-Slotline Power Divider

提出了一种微带线-槽线结构功分器馈电的超宽带印制偶极子天线。利用微带线与槽线所构成T形结的电磁耦合功能,通过合理选择微带线开路枝节及槽线两端U形凹槽的位置和尺寸,功分器实现了信号的超宽带范围内等幅异相分配。仿真表明天线的10dB回波损耗带宽覆盖了3.1~10.6GHz的频段范围。加工制作了天线,测试结果表明仿真与实测吻合良好。

An ultra-wideband printed dipole antenna fed by microstrip-slotline power divider is presented. By properly choosing the location and the size of the open-circuit microstrip stub terminated at the end of the microstrip line and the type ' U' slots terminated at the ends of the slotline,the signals can be divided equal magnitude( but their phases differ by 180°) by the series type T-junction formed by a slotline and two microstrip lines. The simulation results of the antenna demonstrate that the impedance bandwidth determined from a 10 dB return loss is across the band 3. 1 ~ 10. 6GHz. The antenna was fabricated. Experimental results of the antenna show that there is a good agreement between those from simulation and experiment.