基于左手特性的异向介质可调谐天线设计

Design of Tunable Antenna Based on Meta-Material Substrate with Left-Handed Property

设计了一款新型的基于异向介质的可调谐天线.通过在传统环氧板(FR4)介质基底上加载分裂谐振环阵列的方法,使介质在5.2～7.7GHz频段呈现左手特性.该设计改善了传统贴片天线体积大、工作频带窄、增益较低等缺点,并能通过改变分裂谐振环阶数调节天线的中心频率.利用高频仿真软件HFSS对所设计的天线进行了仿真,研究了天线参数与阵列间隙尺寸及阵列阶数的关系,并对天线进行了优化设计.仿真结果表明,该设计可以有效减小天线尺寸,降低回波损耗和增加工作带宽,并实现了天线的可调谐设计.

Split ring resonator （SRR） periodic array was embedded into conventional dielectric to realize the left-handed properties over the band of 5.2 - 7.7 GHz. This design overcomes the disadvantages of the conventional patch antenna, such as the big size, narrow frequency band, and low gain. It also could control the antenna center frequency by changing the orders of the split ring resonator. By employing the software of high frequency simulation （HFSS）, the relation between antenna parameter and the gap size of SRR unit as well as the order of array could be determined and optimized antenna design be rea was carried out and the size, reduce the loss of results show that the proposed de echo, expand the working band, lized. Simulation of the antenna design sign could effectively lessen the antenna and realize the tunable design.