Solutions for the electromagnetic field, found from Maxwell’s equations, make it possible to accurately determine all the characteristics of a microwave device with allowance for the appearance and transformation of certain types of waves into others, losses in materials and radiation, and so on. HFSS uses Finite Element Method (FEM) to solve the equations of electrodynamics, including adaptive generation and division of cells. This can be attributed even to the simplest case of analyzing the smooth rotation of a multilayer microstrip line, when it is impossible to separate, where the microstrip line, and where the line with the suspended substrate. The transition from programs that calculate microwave structures by the methods of the theory of circuits (which include the method of Oliner, which in some cases has a sufficiently high accuracy for practical purposes) to programs that perform a full calculation of the three-dimensional electromagnetic field is due primarily to the fact that many parts of the real device They can not be decomposed into elements that are in the library of models. HFSS is a powerful software package that calculates multimode S-parameters and electromagnetic fields in three-dimensional passive structures of arbitrary shape. HFSS – Three-dimensional modeling of the electromagnetic field.
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