【摘要】 为了拓宽通信系统的信道容量，设计了一种新型双环相控微带天线阵列。该天线阵列以同轴馈电的圆形石墨烯贴片作为阵元，内环包含8个阵元，外环包含16个阵元，均等间隔分布在一个同心圆上。仿真结果表明，双环轨道角动量（Orbital Angular Momentum,OAM）微带天线阵列通过调整相位分布，可以产生模态为l=0、l=±1、l=±2、l=±3、l=±4、l=±5的电磁涡旋波束，并且双环OAM微带天线阵列实现了比单环更高的增益，最高增益达到19.2 dBi。通过改变石墨烯的化学势，该天线可实现5.59～6.28 THz频率可调，为未来无线通信系统的容量提升和频谱利用率优化提供了一种新的选择。更多还原

【Abstract】 In order to broaden the channel capacity of the communication system,a new type of dual-loop phased microstrip antenna array is designed. The antenna array uses coaxially fed circular graphene patches as the elements,with the inner ring containing 8 elements and the outer ring containing 16 elements,evenly spaced over a concentric circle. The simulation results show that the electromagnetic vortex beams with the modes l = 0,l = ±1,l = ±2,l = ±3,l = ±4 and l = ±5 can be generated by adjusting the phase distribution,and the dual loop Orbital Angular Momentum(OAM)microstrip antenna array achieves a higher gain than the single ring,with a maximum gain of 19. 2 dBi. At the same time,by changing the chemical potential of graphene,the antenna can achieve frequency tunable in the range of 5. 59 ～ 6. 28 THz,which provides a new option for capacity improvement and spectrum utilization optimization of wireless communication systems in the future.更多还原