基于倒L缝隙加载的T形WLAN宽频带双频天线设计

Design of T-shaped wideband dual-frequency WLAN antenna based on inverted-L slot loading

针对当前无线通信系统的传输要求和现有WLAN天线存在的不足,设计了一款T形共面波导(CPW)馈电宽频带双频天线。通过改变传统矩形贴片形状并在辐射贴片上加载两个倒L缝隙结构,实现了能够同时工作于WLAN双频段的小型化宽频带天线设计。利用电磁仿真软件Ansoft HFSS13.0对天线参数进行仿真优化分析。仿真结果表明,当S11≤-10dB时,天线的工作频段分别为2.00~2.78GHz,4.22~7.57GHz,相对带宽分别达到32.6%和56.8%。天线具有良好的辐射特性,且结构简单,具有一定的工程设计参考价值。

Aiming at the transmission requirements of current wireless communication systems and the shortcomings of existing WLAN antennas, a T-shaped coplanar waveguide (CPW) feeding broadband dual -band antenna was designed. By changing the shape of the traditional rectangular patch and loading two inverted L-slot structures on the radiating patch, a miniaturized broadband antenna that can simultaneously work on the WLAN dual band was realized. The parameters of the antenna were optimized and analyzed by electromagnetic simulation software Ansoft HFSS 13. 0. The simulation results show that when S11 ≤-10 dB, the working frequency of the antenna is 2. 00-2. 78 GHz, 4. 22-7. 57 GHz, and the relative bandwidth is 32. 6% and 56. 8%, respectively. The antenna has good radiation characteristics and simple structure, which is valuable as the reference for engineering design.