Optimum design method of arbitrary arranged wire grid model antenna using GA-ICT

摘要

This paper presented a design method that automatically generates the optimal structure for an arbitrary wire-grid model antennas using GA-ICT. The proposed GA-ICT uses the same unknown parameters for GA and ICT and the element coordinate parameters are used to generate GA chromosomes while duplicate elements are eliminated from the antenna structure. Using this technique, the number of elements can be successfully changed using fixed chromosomes. Our approach employs a cylindrical coordinate for sector antenna optimization, which is especially useful in dealing with the downsizing problem. This method reduces he analysis space using mirror imaging and a periodic structure. An objective function to deal with the sector antenna downsizing problem was presented. Using the genetic operation of GA-ICT, a new antenna structure or element arrangement was constructed. The 12-sector antenna with the array length of less than 2.7λ, the antenna configuration of which is transformed into a Yagi-Uda antenna was designed and exhibited good antenna performance satisfying 30°in the H-plane of the radiation pattern.