Finite-element analysis (FEA) as an EMC prediction tool

Abstract

Absorbing boundary condition for vector and scalar potentials arising in electromagnetic finite element analyses in frequency and time domains," in Proc. IEEE Antennas Propagar. Soc. Symp., 199 1. J. R. Brauer, J. F. Lee, and R. Mittra, "Quadrilateral finite elements for open boundaries of three-dimensional magnetostatic finite element models," in IEEE INTERMAG Conf., St. Louis, Apr. 1992. R. Plonsey and R. E. Collin, Principles and Applications of Electromagnetic Fields.J. R. Brauer, L. A. Larkin, and B. E. MacNeal, "Higher order 3D isoparametric finite elements for improved magnetic field calculation accuracy,"Abstract-As electronic system complexity increases, the design and analysis tools must keep pace. In the mechanics, structures, and fluids disciplines, numerical tools, such as finiteelement analysis (FEA) have become commonplace in the designers tool kit. In electromagnetics (EM) such analysis tools are still in their infancy. Electromagnetic compatibility (EMC) analysis has been primarily limited to the analysis of simple equivalent circuit models or measurements of a completed design. Few reliable methods exist to predict the EMC of a complex system or group of systems before it leaves the designer's desk. Powerful electromagnetic software based on FEA techniques is now becoming commercially available. These programs are potentially capable of analyzing the complex electromagnetic environment surrounding modern shipboard electronic systems and/or antennas. This paper discusses the output of one FEA program used as a compartmental EMC predictive tool. The FEA program results are compared to the calculated results from a typical radiating EM1 source, a radiating wire over a ground plane, and compares both predictions with validating measurements.

Coupling through tortuous path narrow slot apertures into complex cavities

“…Here, we take the second approach and solve for the difference field directly. Instead of a forced problem we solve the homogeneous wave equation with (21) Since the half-space field is a solution of the homogeneous wave equation, we obtain the following result upon substitution of (12) into (21): (22) The forcing function for this problem becomes the incident halfspace field via (12) and (20).…”

“…Nonzero thickness was incorporated by using finite-difference techniques or FEM to solve the interior problem increasing the computational size of the problem considerably. In recent years, the FEM has proven to be a useful electromagnetic compatibility (EMC) prediction tool [22], [23].…”

Evaluation of the Inductive Coupling between Equivalent Emission Sources of Components

“…There are not many reliable methods to predict the EMC of a complex system in the design phase [5], and, thus, in practice, the EMC design is still carried out by trial and error [3] causing high development cost in case of malfunctioning due to EMI, when the prototype is tested.…”

A Transmission Line Simulator for Emc in Complex Electronic Systems (Emcsim)

“…Numerical solutions based on this kind of approach have recently been developed and are now becoming commercially available. 1 The potential for these programs is to facilitate the production of very detailed descriptions of the geometrical and electromagnetic properties of the system under analysis. Such features allow fine-grained EMC analyses, but at the same time restrict the set of possible applications for this family of computer tools.…”