多波束天线馈源激励系数的优化

OPTIMIZATION OF EXCITATION COEFFICIENTS OF FEEDS OF MULTI-BEAM ANTENNA

本文采用Max min方法探讨星载多波束天线馈源激励系数的优化问题,给出了精确的数学模型,强调问题的特点:目标函数是不可微的多峰函数。据此,采用复合形法寻优,并结合我国实际情况,探讨了地面站的加权与雨耗、版图东西部分区和馈源激励系数分组三个实际问题。 本文对一实例进行了优化,结果表明,优化后的最弱站场强有明显提高,整个服务区内的场强趋于一致。

The optimization of the amplitudes and phases of the feed excitation coefficients of MBA is discussed with Maxmin criterion. An exact mathematical model of the problem is given with emphasis on the characters of the problem-the object function is an indifferentiable multipeak function. Hence, the “complexity method” is used to do the optimization. Considering the condition of China, three practical questions are discussed, which are the rain lose and weighting, the division of the east and west part of the territory and the grouping of the feed coefficients.From the optimization of an example, it can be seen that the amplitude of the field of the weakest station is greatly improved, and the field of the whole service area tends to be uniform.