Complex plane integration in the modelling of electromagnetic fields in layered media: Part 2. Pole location

Abstract

This part 2 companion paper derives several related methods to determine pole location for guided electromagnetic waves in a planarly layered medium in the quasi-static approximation. Such analysis can be useful for the numerical evaluation of field representation integrals of layered earth models. Results compare favourably with a numerical nonlinear optimizer in cases where the poles are suitably distinct. A transverse resonance method is also shown to yield reasonable results. Bounds for surface wave and guided wave pole locations are also included. © 2014 Sinopec Geophysical Research Institute.