一种新型多频微带天线的分析与设计

 对C型缝隙微带天线进行理论分析，设计了一种C型缝隙的微带天线，并利用仿真软件HFSS 10.0对天线的特性进行仿真验证。结果表明，C型缝隙天线在高频的辐射方向性能出现主瓣分离现象，通过改变贴片表面电流路径对高频性能进行改善，改进后的C型天线在回波损耗小于-10.0dB时，该天线工作的频段分别为2.26～2.51、3.38～3.60和4.19～4.48GHz，且天线的尺寸得到了有效缩减。天线的整体辐射性能良好，且结构简单，易于实现。所设计的天线可以作为多频段小型微带天线，用于无线通信系统中。

Analysis and Design of a Multi-band Microstrip Antenna

Microstrip antenna with a C-shaped slot is analyzed, and a multi-band microstrip antenna with C-shaped slot is designed. Numerical simulation is performed for the characteristics of the antenna with the software HFSS 10.0, which is a kind of simulation software based on Finite Element Mehod (FEM). The simulation results show that the C-shaped antenna's radiation character in the high frequency was separated. By changing the current path in the patch to improved the performance, the operation frequency channels of the improved antenna are 2.26～2.51, 3.38～3.60 and 4.19～4.48GHz, when return loss is less than -10dB, and the size of the microstrip antenna is reduced availably. Moreover, the antenna has a very well unitary radiation character and simple configuration. Therefore, this kind of antenna can be used in RF communication as a multi-band and compact microstrip antenna.