Elliptical Wide Slot Microstrip Patch Antenna Design by Using Dynamic Constrained Multiobjective Optimization Evolutionary Algorithm

Abstract

This paper evolves an elliptical wide slot microstrip patch antenna by using Dynamic Constrained Multiobjective Optimization Evolutionary Algorithm (DCMOEA). The antenna structure is a square substrate with a size of 30 mm \\(\\times \\) 30 mm \\(\\times \\) 1.6 mm. The radiation patch in the front side, which is formed by subtracting two ellipses with same axial ratio R. The coupling element in the back side, where consists of difference between ground plate and an ellipse with an axial ratio R. To obtain optimum antenna structure with satisfying the design requirements, the antenna optimization problem is modeled as a constrained optimization problem (COP). The experimental results show the optimum antenna is obtained, as well as we find the radiation patch should be a whole ellipse instead of subtracting with two ellipses. Therefore, we draw a conclusion that the radiation patch should be complete rather than partial in the surface antennas design, which provides a valuable reference for follow-up study with antenna design in real engineering and scientific research.