HFSS
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HFSS is a commercial finite element method solver for electromagnetic structures from Ansoft Corporation. The acronym originally stood for high frequency structural simulator. It is one of the most popular and powerful applications used for antenna design, and the design of complex RF electronic circuit elements including filters, transmission lines, and packaging. It was originally developed by Professor Zoltan Cendes, his brother Nicholas Csendes, and his students at Carnegie Mellon University, under a marketing relationship with Hewlett-Packard. After various business relationships, H-P (by this time Agilent EEsof EDA division) and Cendes & Csendes (by this time incorporated as Ansoft) went their separate ways [1]: Agilent with the critically acclaimed [2] EMDS and Ansoft with their HFSS products, respectively.