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介绍了单极子手机天线的基本原理，设计了一款应用4G手机的多频单极子平面天线。该天线由一个辐射臂和两个耦合枝节组成，通过U型与L型的折弯耦合枝节获得多频特性。在 857 - 992 MHz和1626 - 3000 MHz频率范围内，所设计天线的回波损耗小于 -6 dB并具有良好的方向图特性，能满足移动终端在多个4G频段的应用要求。此外，采用HFSS软件对所设计的天线进行了参数分析，得到了影响天线阻抗特性的敏感尺寸参数，对该类天线的设计具有一定的指导意义。
The basic principle of monopole mobile antenna is introduced and a multi-frequency monopole planar antenna with 4G mobile phone is designed. The antenna is composed of a radiating arm and two coupling stubs, and multi-frequency characteristics are obtained through the U-shaped and L-shaped bending coupling stubs. In the 857-992 MHz and 1626-3000 MHz frequency ranges, the designed antenna has a return loss of less than -6 dB and good directional characteristics to meet the mobile terminal’s application requirements in multiple 4G frequency bands. In addition, the HFSS software is used to analyze the parameters of the designed antenna, and the sensitive dimension parameters that affect the impedance characteristics of the antenna are obtained, which is of guiding significance to the design of the antenna.