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针对微带反射阵天线带宽窄的问题,提出了一种新型线极化双谐振宽带“蝴蝶”形单元结构,详细描述了单元结构设计步骤,研究了不同基板以及不同结构参数对单元相位曲线的相移范围、平滑度以及谐振点位置的影响。仿真测试表明,该单元结构能够在5.5-7GHz带宽内具有良好的相位特性曲线。对36个“蝴蝶”形单元组件测试表明,其在20%带宽内辐射效率达到40%以上,最大辐射方向上交叉极化电平小于-30dB。此外,“蝴蝶”形单元结构类似于“十”字形单元结构,有利于进一步扩展实现多频带、多波束反射阵天线设计。
Aiming at the problem of narrow bandwidth of microstrip reflective antenna, a new linear polarization dual resonance broadband “butterfly” shaped cell structure is proposed. The steps of cell structure design are described in detail. The effects of different substrates and different structural parameters on the cell phase The phase shift range of the curve, the smoothness and the position of the resonance point. Simulation tests show that the cell structure can have a good phase characteristic curve in the 5.5-7GHz bandwidth. Tests on 36 “butterfly” shaped cell components show that the radiation efficiency reaches more than 40% in 20% bandwidth and less than -30 dB in the direction of maximum radiation. In addition, “butterfly ” shaped unit structure is similar to “ten ” glyph unit structure, which is conducive to further expand the realization of multi-band, multi-beam reflected array antenna design.