摘要
运用以矩量法为原理的软件 (Ensemble和 Hfss) ,分析了加载缝隙在双频微带贴片天线中的作用机理 ,给出了缝隙尺寸、位置变化时天线特性的变化规律。使用该技术可以在 1～ 2 . 0 6之间方便地调整微带天线两个谐振频率的比例关系。利用此技术分别设计了工作频率为 2 GHz和 2 .5 5 GHz的矩形天线以及工作频率为1 .8GHz和 1 .9GHz的三角形天线 ,其回波损耗可优于 2 0 d B。加工并测量了一双频三角形天线产品 。
An approach to design dual frequency patch antennas is presented, in which slots are applied to adjust the resonant frequencies of microstrip antennas. The method of moment is involved to analyze the effect of slots on the antenna characteristics, including bandwidth, antenna pattern, S parameters, input impedance, equivalent surface current distribution, and gain. Changing the length and location of the slots, tendencies of the antennas' S parameters are obtained. By inserting a pair of oblique slots and adjusting their parameters properly, frequency ratio from 1~1 16 and 1 77~2 06 are obtained, and combining the technique with other methods, a wider frequency ratio from 1 to 2 06 is acquired. Two antennas, working at 2 GHz & 2 5 GHz and 1 8 GHz & 1 9 GHz respectively, are designed by the approach shown in this paper, and the return loss is better than 20 dB. The validity and feasibility are proved by the measuring result of the real antenna. And a dual frequency patch antenna was machined and analyzed
出处
《吉林大学学报（信息科学版）》
CAS
2002年第1期45-49,共5页
Journal of Jilin University（Information Science Edition）
基金
国家自然科学基金资助项目 (699710 0 5 )
教育部优秀青年教师资助计划项目
关键词
微带天线
移动通信
矩量法
缝隙
双频
Microstrip antennas
Methods of moment
Mobile communications
Slot
Dual frequency
