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设计了一款新型双频具有小频率比1.17的方形环负载圆极化槽天线。通过在圆形贴片的上方放置方形环,引入一个具有最小轴比值的谐振点,从而实现圆极化天线的双频工作。双频圆极化天线被设计工作在4.65GHz和5.42GHz这两个频段,并被印刷和测试。实验结果表明在这两个频段上的-10d B阻抗带宽达到200MHz,在低频的3d B轴比带宽(4.56~4.71GHz)为2.6%,在高频的3d B轴比带宽(5.38~5.42GHz)为1.5%,仿真结果性能良好,并进行实物加工,实测与仿真数据非常吻合。
A new double-frequency quadratic loop circularly loaded circularly polarized slot antenna with a small frequency ratio of 1.17 was designed. By placing a square loop over the circular patch, a resonant point with the smallest ratio of axes is introduced to achieve dual-frequency operation of the circularly polarized antenna. Dual-frequency circularly polarized antennas are designed to operate in both the 4.65GHz and 5.42GHz frequency bands and are printed and tested. Experimental results show that the -10d B impedance bandwidth reaches 200MHz in these two frequency bands, 2.6% in 3dB axis at low frequency (4.56 ~ 4.71GHz) and 3dB in high frequency band (5.38 ~ 5.42GHz ) Is 1.5%, the simulation result is good, and the physical processing is carried out. The measured data are in good agreement with the simulation data.