Electric circuit element boundary conditions in the finite element method for full-wave passive electromagnetic devices

Abstract A natural coupling of a circuit with an electromagnetic device is possible if special boundary conditions, called Electric Circuit Element (ECE), are used for the field formulation. This contribution shows how these ECE conditions can be implemented into 3D-finite element method solving coupled full-wave (EM) field-circuit problems in frequency domain. The response allows extraction reduced order model analyzed device, accounting all EM effects. implementation based on weak formulation that uses electric strength E strictly inside domain and scalar potential V defined solely at boundary. Edge elements three-dimensional nodal its two-dimensional described free environment Open Numerical Engineering LABoratory (onelab) . validation carried out 3D examples.