含Zigzag有限地结构的新型手机倒L天线系统

A novel inverted-L antenna based on finite ground plane with Zigzag structure

在讨论手机有限接地板对倒L天线辐射及匹配性能影响基础上,结合倒L天线工作原理及手机结构的限制特征,提出了一款拥有Zigzag寄生结构的新型手机有限地。它与典型倒L天线结合,成功克服紧缩结构下天线辐射效率及匹配欠佳的问题;在GSM900频段处实现相对带宽达24%(VSWR<2),为普通单极天线的3倍左右,有效拓展了单极天线的工作带宽。

This paper firstly investigates the ground plane＇s influences to the monopole inverted-L antenna in hand phones. On this basis, considering the operational principle of the monopole antenna and the confinement of the phones＇ structure, this paper proposes a novel ground plane that has a Zigzag parasitic structure. Combined with a typical inverted-L antenna it overcomes the low radiation ability and impedance mismatching problems in the compact structure, and its relative bandwidth reaches to 24% （VSWR 〈 2） that is about three times of the normal monopole antenna at GSM900. It effectively expands the mnnopole antenna＇s bandwidth.