HFSS – High Frequency Structure Simulator, a 3D electromagnetic simulation software launched by Ansoft, has been acquired by ANSYS. It is the world\'s first commercial 3D structural electromagnetic field simulation software and is recognized by the industry as the industrial standard for 3D electromagnetic field design and analysis. HFSS provides a simple and intuitive user design interface, a precise adaptive field solver, and a powerful post-processor with unprecedented electrical performance analysis capabilities. It can calculate the S parameters and full-wave electromagnetic fields of any shape of 3D passive structures. HFSS software has powerful antenna design functions. It can calculate antenna parameters such as gain, directivity, far-field pattern profile, far-field 3D map and 3dB bandwidth; draw polarization characteristics, including spherical field components, circular polarization field components, Ludwig third definition field components and axial ratios. Using HFSS, you can calculate: ① basic electromagnetic field numerical solutions and open boundary problems, near and far field radiation problems; ② port characteristic impedance and transmission constant; ③ S parameters and normalized S parameters of corresponding port impedance; ④ eigenmode or resonant solution of the structure. Moreover, Ansoft\'s high-frequency solution, consisting of Ansoft HFSS and Ansoft Designer, is currently the only high-frequency design solution based on physical prototypes, providing fast and accurate design methods from system to circuit to component level, covering all aspects of high-frequency design. HFSS is the most popular design software for antenna design today.
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