【摘要】 本文设计了一种新型的低互耦微带反射阵列天线.反射单元采用随机点阵结构,利用随机点阵结构的高自由度获得不同的反射相位.为了降低单元之间的互耦效应,在随机点阵单元外围添加方形金属环.采用该新型微带反射单元,设计了7×7规模的反射阵列.仿真和测试结果表明,在工作频率5.8GHz处,天线的增益为19.7dBi,阻抗带宽为6.0%(5.71～6.06GHz),主旁瓣比优于13.1dB,交叉极化小于-20dB,印证了随机点阵结构设计反射单元的可行性.更多还原

【Abstract】 A novel microstrip refletarray antenna constructed by elements of random fragmented patches is proposed in this paper.The reflection element adopts a random fragmented structure.In this case,a variety of different reflection phases can be obtained due to different degrees of freedom of the random lattice structure.To suppress the mutual coupling between elements,each fragmented unit is integrated with a metal square loop.With the new microstrip reflection unit,a 7×7 scale reflective array was designed.Both the simulation and measurement results show that the microstrip reflectarray antenna possesses a high gain of 19.7 dBi as it is working frequency of 5.8 GHz.Meanwhile,this antenna achieves an impedance bandwidth(-10 dB)of 6%,side-lobes 13.1 dB below the main lobe,and with the cross-polarization level less than-20 dB.It confirms the feasibility of designing the reflection element based on random fragment.更多还原