一种基于环缝高次模的双频段大频差天线  

A Novel Dual-band Antenna Operating at Two Very Different Frequencies Based on High-order Mode of Ring Slots

作　　者：张祖存[1] 邓小乔[2] 吴素云[1] 

机构地区：[1]中国船舶重工集团公司第723研究所,扬州225001 [2]江苏科技大学电子信息学院,镇江212003

出　　处：《微波学报》2016年第4期6-9,共4页Journal of Microwaves

摘　　要：提出了一种基于加载环缝高次模的新型双频段大频差天线,其具体结构为在蝶形天线两臂上对称地加载一对闭合圆环缝隙。常规的环缝加载方式为开口环缝加载,该加载方式环缝工作在基模;而本文提出的闭合环缝加载,可使环缝工作在高次模。加载环缝高次模的利用,可使天线在实现大频差的同时确保其在高频段的性能。所研制的天线可实现超过3∶1的大频差,仿真和实测结果表明:天线在两个频段都具有良好的性能。新型天线结构的研制成功丰富了多频天线的种类,为实现大频差天线提供了一种新的思路和方法。A novel antenna operating at two very different frequencies based on high-order mode of circular ring slots has been proposed. The antenna is realized by loading two closed circular ring slots on two arms of bow-tie antenna respec- tively. Fundamental mode of circular ring slots usually obtained by loading opened circular ring slots, while high-order mode is obtained by using closed circular ring slots. By using high-order mode of circular ring slots, two very different frequencies are realized and the performance at high frequency is insured. For the antenna, the frequency ratio can be more than 3 ： 1. Both simulation and experiment show that the proposed antenna has good performance. Through the development of the novel antenna, the kind of multi-band antenna is enriched, and a feasible structure and method is provided for realizing high per- formance antenna at two very different frequencies.

关 键 词：双频段 大频差 环缝加载 蝶形天线 

分 类 号：TN820[电子电信—信息与通信工程]