Design and optimization of a bowtie dipole adjacent to dielectric material for through the wall imaging using hybrid electromagnetic computational analysis techniques

This paper presents parameterization and optimization of a bowtie-dipole adjacent to dielectric material for through the wall imaging based on hybrid finite difference time domain and method of moment's computational electromagnetic techniques. The antenna shapes are parameterized and optimized to reduce the return loss in a specific frequency band using Surrogate Model Assisted Differential Evolution Algorithm for the optimization task. The SADEA Optimizer combines the capabilities of CST microwave studio electromagnetic design environment with those of intrinsic MATLAB computing and programming environment. Impedance matching and gain are optimized over a predefined frequency range. This resulted to a very small and compact 12.87mm × 28.62mm ultra-wideband antenna with optimal parameters.