基于遗传算法的阵列天线波束能量定量控制技术

Quantitative control technique of beam energy for array antennas based on genetic algorithm

提出发射天线(如无线局域网天线、基站天线等)辐射强度随用户信号强度的变化而实时调整的技术.该技术基于遗传算法,将阵列天线波束能量定量控制问题转化为一个带有约束条件的极值问题.在算法的适应度函数设计中,通过自适应罚函数将发射阵列天线和接收天线间的能量传输效率与接收天线信号强度构成一个简单的极值函数,得到阵列天线的最优激励分布.高频电磁结构仿真软件(HFSS)的验证结果表明:阵列天线辐射的信号强度在接收天线处能达预期值.可见,该技术能实现对阵列天线波束能量的定量控制.

The technique that the radiation intensity of transmitting antennas(WIFI antennas,base station antennas,etc.)could be adjusted in real time with the change of user’s signal intensity was proposed.Based on genetic algorithm(GA),the problem of beam energy quantitative control for array antennas was transformed into an extreme problem with constraints.In the design of fitness function of GA,an adaptive penalty function was designed to combine the power transmission efficiency between the transmitting array antennas and receiving antennas with the signal intensity of receiving antennas to construct a simple extreme function,and the optimal excitation distributions of the transmitting array antennas were obtained.The verification results in High Frequency Structure Simulator(HFSS)showed that the signal intensity radiated by the transmitting array antennas could reach the expected value at receiving antennas.It could be seen that this technique could achieve quantitative control of beam energy for array antennas.