阶梯型宽带微带天线的设计仿真

Design and Simulation of Stepped Broadband Microstrip Antenna

摘要:

针对现代通信系统天线的高宽带、高定向性需求，提出了在双层微带贴片上开阶梯型槽并采用微带线耦合馈电方式扩展带宽，研究了不同等分阶梯数对天线带宽的影响。采用电磁仿真软件 HFSS 对天线参数进行仿真和优化，最终确定上层贴片使用四等分阶梯设计，下层贴片使用六等分阶梯设计。仿真结果表明，天线在 7. 2~ 12. 6 GHz（相对带宽 54%）范围内的 S₁₁＜-10 dB。

Abstract:

The demand for high bandwidth and high directionality in modern communication system antennas has been increasing. In this study， two-layer microstrip patch， powered by cross slot and coupled microstrip lines， is utilized to make the bandwidth. Furthermore， the result of different steps on antenna bandwidth is examined. The antenna parameters were modeled and optimized using HFSS electromagnetic modeling software. Finally， it is confirmed that the upper sticker has a 4D trapezoidal structure and lower sticker has a 6D trapezoidal structure. It is concluded that S₁₁ antenna is less than -10 dB in the range of 7. 2-12. 6 GHz （54% of the relative bandwidth）