设计了一种新型Φ形结构的多频带小型微带贴片天线,通过改变贴片表面电流路径的方法来实现天线的多频带和小型化.采用基于有限元方法的电磁仿真软件HFSS10.0对所设计的天线进行了仿真.仿真结果表明,当回波损耗小于-10.0 dB时,天线的工作频段分别为2040～2 210 MHz,2 310～2 530 MHz,3 090～3 360 MHz,4 400～4 700MHz.与普通的微带天线相比,所设计的天线不仅实现了多频段工作的性能,且其整体尺寸减少了79.17%,从而验证了这种设计方案的有效性.该天线的整体辐射性能良好,且结构简单易于实现,能够满足移动终端内置天线的多频带和小型化的要求.%A novel φ-shaped microstrip antenna is investigated in this paper. The antenna can realize the function of miniaturization and multi-frequency by changing the patch surface current path. Numerical simulation is performed for the antenna with the software HFSS 10. 0, which is a kind of simulation software based on finite element method (FEM). The simulation results show that the operation frequencies of this antenna are 2 040 ～2 210 MHz,2 310 ～2 530 MHz,3 090 ～3 360 MHz and 4 400 ～4 700 MHz with return loss less than - 10. 0 dB. Compared with the conventional microstrip patch antenna, the character of multi-frequency is achieved and its total size is reduced by 79.17％, which demonstrates that the proposed antenna structure is efficient. Moreover, the antenna has a very good unitary radiation character and simple configuration. This antenna structure can meet the requirements of miniaturization and multi-frequency in internal antenna of the mobile terminals.
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