圆极化方形环缝隙天线的设计

摘要

In this paper,a circularly polarized square-ring slot antenna is proposed.AC-shaped parasitic element is introduced In the feed line layer,and the miniature miniature perturbations on the diagonal of the slot are generated,which can split the fundamental mode into two degenerate resonant modes with equal amplitudes and 90° phase-difference for CP performance.In which the radiation of circularly polarization is excited,the total size of antenna is 40mm× 40mm× 1.6mm.The simulated and measured results show that good radiation performance has been achieved.The impedance bandwidth of the antenna is 22％ (2.45～3.07 GHz),and the 3 dB axial ratio bandwidth is 2.2％ (2.67～2.73 GHz).%本文提出了一个圆极化方形环缝隙天线.通过在天线馈线层引入一个C型寄生单元,使其在环形缝隙的对角处产生微扰,将天线的基模分解成两个幅度相同且相位差为90°的简并模,从而激发圆极化辐射.天线的总尺寸为40 mm×40 mm×1.6 mm.仿真和测量结果表明:天线具有良好的辐射性能.天线的阻抗带宽为22％ (2.46～3.07 GHz),轴比带宽为2.2％ (2.67～2.73 GHz).