十字形缝隙加载圆极化三角形贴片天线设计

摘要

A design method for compact size triangular patch antenna of circular polarization is proposed in this article. Two equal cross slots are embedded on the patch and the ground plane to achieve size reduction and circular polarization. It is revealed by HFSS simulation results that when the cross length is 0.25 times the triangle edge length, circular polarization can be obtained. The results also show that the circular polarization operating frequency can be tuned by the cross slot size on the patch. The relative impedance bandwidth and circular polarization bandwidth at 2.246GHz are 3.8%and 1%, respectively.%本文提出了一种小型圆极化三角形贴片天线的设计方法. 通过在辐射贴片和接地板上刻两个尺寸相等的十字形槽来实现尺寸缩减和圆极化. HFSS仿真结果表明,当十字形槽的长度与三角形贴片的边长之比为0.25时,可获得圆极化辐射,并且可以通过调节贴片上十字形槽的尺寸改变天线的圆极化工作频率. 当谐振频率为2.246GHz时,天线的相对阻抗带宽和圆极化带宽分别为3.8%和1%.