单向宽带毫米波平面缝隙天线的设计与仿真

Design and Simulation of the Broadband Unidirectional CPW-Fed Rectangular Slot Antenna

设计了一种基于MEMS微加工技术制作的共面波导馈电的单向宽带毫米波平面缝隙天线.采用平面矩形缝隙辐射单元,可实现约80%的阻抗带宽(驻波比≤2).通过增加波束引导缝隙和多层反射截止缝隙,可实现缝隙天线单向辐射,天线增益可由原来的3.8 dB提高到6.8 dB左右.采用Ansoft HFSS有限元仿真软件对设计进行仿真优化,并用CST微波工作室仿真软件对仿真优化进行验证,结果表明,两种仿真结果一致.

A broadband unidirectional CPW-fed rectangular slot millimeter wave antenna based on MEMS （Micro-Electro-Mechanical Systems） micro-fabrication technology was discussed, A wide impedance band-width of 80% with VSWR≤2 is achieved. By adding several cut-off slots and a guiding slot, the antenna radiates unidirectional, and the max gain of the antenna rises from 3.8 dB to 6.8 dB. Ansoft HFSS and CST microwave studio, two high frequency structure simulation software based on finite element method （FEM） and finite integration method （FIM）, were used to analyze the antenna performances.