Design of a Frequency-adjustable High-gain OAM Array Antenna
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.
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维普
