微带偶极子天线特性的研究

The research on printing dipole antenna characteristics

在无线电通信系统中,对于信息的传输,天线的作用是不可或缺的。随着信息产业的快速发展,对各种通信电子产品提出了小型化、高效率的要求。文章基于等效电路模型对天线的几何结构参数进行了研究,利用ADS仿真软件设计了一款谐振频率2.4GHz的微带振子天线,并分析了参数对该天线特性的影响,进行了参数优化。仿真结果表明,该天线在VSWR小于2时相对带宽达到25%,反射损耗-54.21dB,输入阻抗50.5-j0.2Ω,具有良好的阻抗匹配特性。天线E面辐射不圆度小于3dB,具有良好的方向特性。适用于无线局域网络、短距离移动通信、雷达通讯等领域及作为天线阵元单元。

The antenna is indispensable in wireless communication system.All kinds of electronic communication products require miniaturization and efficient with the rapid development of electronic information industry.According to the research of antenna constructional parameters basing on equivalent circuit model by designing 2.4GHz printing dipole antenna with balanced balun microstrip feed by using ADS2009 electromagnetic simulation software,this paper realizes optimization by analying the antenna performance parameters.Simulated results show that the antenna has a relative bandwidth of 25%（VSWR2）,reflection loss of-54.21dB,input impedance of 50.5-j0.2Ω,and out-of-roundness of E plane radition less than 3dB.This antenna has well impedance matching characteristics and well directional characteristics.It applies to WLAN（Wireless Local Area Networks）,short distance mobile communication,radar communication and so on.