A hybrid finite-element-method/method-of-moments (FEM/MoM) approach is applied to the analysis of a gapped power-bus structure on a printed circuit board. FEM is used to model the details of the structure. MoM is used to provide a radiation boundary condition to terminate the FEM mesh. Numerical results exhibit significant errors when the FEM/MoM boundary is chosen to coincide with the physical boundary of the board. These errors are due to the inability of hybrid elements on the boundary to enforce the correct boundary condition at a gap edge in a strong sense. A much better alternative is to extend the MoM boundary above the surface of the board.


Electrical and Computer Engineering

Keywords and Phrases

FEM Mesh; FEM/MoM Boundary; MoM Boundary; PCB Analysis; Boundary Integral Equations; Finite Element Analysis; Finite Element Boundary Element; Finite Element Boundary Integral; Finite-Element-Method; Gapped Power-Bus Structure Modeling; Hybrid FEM/MoM Approach; Method of Moments; Method-Of-Moments; Printed Circuit Board; Printed Circuit Testing; Radiation Boundary Condition; Surface Integral Equation

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version

Final Version

File Type





© 2002 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jan 2002