A PhD thesis titled  Design and Simulation of Linear and Planar Arrays of Dielectric Rod Antennas Excited by New Design of Circular Microstrip Antennas  was defended at College of Science, Department of Physics on )February 2, 2023 ), for the PhD Candidate  Riyam A. Mutashar. The aim of the thesis is mainly concerned with design and simulation in addition to parametric study of parameters to CMSAs, DRAs and arrays of DRAs using (HFSS).