HFWorks is an antenna and electromagnetic simulation software for RF, Microwave, mm-wave, and high speed digital circuits. HFWorks solves electromagnetic radiation, electromagnetic waves, electromagnetic propagation, electromagnetic resonance, electromagnetic interference (EMI), electromagnetic compatibility (EMC), and signal integrity (SI) problems for RF/MW frequencies and beyond. It uses state-of-the-art finite element solvers and meshing technologies to compute fields as well as antennas and circuit parameters. It can simulate single antenna elements as well as multiple array antenna configurations. HFWorks can also be used for time domain computations such as TDR and Eye Diagram. It can predict power handling capabilities of 3D structures and localize potential field breakdown areas. It also provides the capability to simulate RF microwave heating as a function of applied power.