ABSTRACT
This chapter discusses the use of the surface-impedance approximation to deal with the simulation of RF fields around integrated passive device structures. It encounters situations that the solving of electromagnetic waves in metallic structures combined with dielectric regions can become very cumbersome due to the stiffness of the Newton-Raphson matrices. The use of the surface impedance approximation is not new. It is a well-known method to set boundary conditions in wave guide calculations. The metal in wave guide modeling is solved by ignoring the wavy details inside the metal and to consider the metallic walls as boundaries of the simulation domain. Consider the case of an electromagnetic wave bouncing on a flat metallic plane. First suppose that the conductivity in the metal is infinite. The structure is one-dimensional and its purpose is to test the implementation of the surface-impedance boundary conditions.
