| 摘要: |
| 介绍了共面波导天线的性能、设计原理，分析了各个参数对天线性能的影响，通过优
化半椭圆辐射贴片的长短轴半径，设计了一种结构简单的共面波导馈电的小型超宽带天线，
覆盖频段为2.9～10.8 GHz。在此天线的基础上，采用在天线辐射贴片底端依次刻蚀三
组矩形
凹口的措施，使得天线的带宽得到进一步的展宽，覆盖了3～31 GHz频段，阻抗带宽超
过10∶1。加
工了实物并进行了测试，测试结果与仿真结果吻合较好，表明这种展宽带宽方法的有效性。
该天线结构简单，尺寸小，便于集成在多种移动通信系统中。 |
| 关键词: 移动通信 超宽带天线 共面波导 展宽带宽 |
| DOI： |
|
| 基金项目: |
|
| Design of a CPW-fed Wideband Antenna |
| ZHANG Jia-liang,LEI Zhen-ya,XIE Yong-jun,YANG Ke,WEN Rui |
| (Key Laboratory of Antenna and Microwave Technology, Xidian University
, Xi′an 710071,China;Key Laboratory of Antenna and Microwave Technology, Xidian University
, Xi′an 710071,China;EMC Lab,Beijing University of Aeronautics and Astrona
utics, Beijing 100083, China) |
| Abstract: |
| The performance and design principles of the cop
lanar waveguide(CPW) antenna are introduced, and the influence of parameters on
antenna properties is analysed.
By optimizing the length of the long and short radius of the semielliptical r
adiation patch, a small simplestructured CPW-fed UWB(Ultra-wideband) antenna i
s
developed, which covers 2.9～10.8 GHz. Based on this
antenn
a, by deploying the measure of etching three pairs of rectangular notches succes
sively at the bottom of the antenna radiation patch, the bandwidth of the antenn
a is broadened, ranging from 3～31 GHz. The impedance bandwidth ha
s exceeded 10∶1. An antenna is manufactured and tested. The results show a
good
agreement with the simulation results, which indicates the validity of the meth
od to broaden bandwidth. This antenna is simple in structure and small in size,
and ca
n be conveniently integrated in various mobile communication systems. |
| Key words: mobile communication UWB antenna CPW broaden bandwidth |
《电讯技术》编辑部 