Addressing the growing demand for low-cost, accessible RF and electromagnetic solvers in MATLAB, this book presents a compact, customizable, fully-documented all-MATLAB three-dimensional solver. It introduces the FDTD and MoM modeling methods and implements both using simple yet powerful MATLAB codes, requiring only the basic MATLAB package. The focus is on immediate applications of the developed numerical algorithms in electrical, biomedical, and civil engineering. This is an especially useful guide for researchers working with wireless body area networks in both the commercial and military sectors.