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通过将天线谐振在零阶模式,以及在地平面增加细长线的方法设计了一款基于复合左右手传输线的小型天线,并利用仿真软件CST对该天线的特性进行了仿真验证。结果表明:天线的物理尺寸仅为23 mm×21 mm×1.8mm(0.188λ0×0.171λ0×0.015λ0),天线的零阶谐振频率为2.448 GHz,–10 d B回波损耗阻抗带宽达97.8 MHz,相对带宽达到4.0%,最大增益为2.451 d Bi。所设计的天线具有尺寸小,结构简单、频带宽,增益高等优点,能够满足无线局域网(2.4~2.483 5 GHz)的要求,有广阔的应用前景。
A small antenna based on composite left and right hand transmission lines is designed by resonating the antenna in zero-order mode and adding slender lines in the ground plane. The characteristics of the antenna are verified by simulation software CST. The results show that the antenna’s physical size is only 23 mm × 21 mm × 1.8 mm (0.188λ0 × 0.171λ0 × 0.015λ0), the zero-order resonance frequency of the antenna is 2.448 GHz, and the return impedance bandwidth of -10 d B is 97.8 MHz , The relative bandwidth reaches 4.0%, the maximum gain is 2.451 d Bi. The designed antenna has the advantages of small size, simple structure, wide frequency band and high gain, and can meet the requirements of wireless local area network (2.4 ~ 2.483 5 GHz) and has broad application prospect.