The HFSS software from ANSYS is an adaptive meshing technology based software used for simulating 3-D full-wave electromagnetic fields. It is one of the most powerful and used software tools in the RF & Microwave Industry. It provides state-of-the-art solver technologies based on finite element, integral equation, asymptotic and advanced hybrid methods to solve a wide range of microwave, RF and high-speed digital applications. 

The software also has a linear circuit simulator with integrated Optimetrics for input and matching network design. It is possible to extract parasitic parameters (S, Y, Z), visualize 3D electromagnetic fields (near- and far-field), and generate Full-Wave SPICE models that link to circuit simulations by using HFSS. 

The software also has the ability to automatically generate an appropriate, efficient, and accurate mesh for solving specific problems. It can be used for designing a broad range of applications including antennas, phased arrays, passive RF/MW components, high-speed interconnects, connectors, IC packaging and PCBs.