Transmission and reflection of electromagnetic waves by an obstacle inside a waveguide
Artikel i vetenskaplig tidskrift, 1981

We consider the transmission and reflection of electromagnetic waves by an obstacle inside a waveguide. The method employed is an adaptation of the null‐field approach (T‐matrix method). The geometry is more or less arbitrary, but only for a waveguide with constant cross section can we obtain the scattered field in a not too formal way. For a circular cross section we derive comparatively explicit expressions for the transmission and reflection coefficients of the obstacle, and we give numerical results for spherical and spheroidal obstacles in rotationally symmetric geometries. As an important part of the theory, we have derived some apparently new transformations between the cylindrical and spherical vector waves and also expansions of the free‐space Green’s dyadic in cylindrical vector waves.

Författare

Anders E Boström

Institutionen för teoretisk fysik

Peter Olsson

Institutionen för teoretisk fysik

Journal of Applied Physics

0021-8979 (ISSN) 1089-7550 (eISSN)

Vol. 52 1187-1196

Ämneskategorier

Elektroteknik och elektronik

Annan elektroteknik och elektronik

DOI

10.1063/1.329736