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Alternative representation of dyadic Green's functions for circular cylindrical cavities with applications to the EMC characterization of space station modules
Author(s) -
Daniele Vito,
Gilli Marco,
Graglia Roberto D.
Publication year - 2000
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/1999rs001913
Subject(s) - representation (politics) , computation , electromagnetic field , mathematics , waveguide , electromagnetic compatibility , space (punctuation) , electrical impedance , acoustics , geometry , mathematical analysis , physics , topology (electrical circuits) , optics , computer science , algorithm , quantum mechanics , politics , political science , law , operating system , combinatorics
This paper compares two different representations of the dyadic Green's functions for circular cylindrical cavities, also valid at the source point. The representations are obtained by considering the cavity either as a circular waveguide (longitudinal representation) or as a radial waveguide (radial representation), terminated by conducting surfaces. The radial representation of dyadic Green's functions for circular cylindrical cavities is not available in the previous literature and is applied to study the field penetrating a space station module through apertures, including lateral ones, or due either to elementary sources or to wire antennas active in the module. We show that for the typical dimensions of spatial modules the radial representations give rise to more convergent series and therefore are more suitable for the computation of the cavity electromagnetic fields. The problem of obtaining the self and mutual impedances of two wire antennas located in the cavity is also discussed in general, and various results are reported for particular cases. Simplified cavity models can be effectively applied to the electromagnetic compatibility (EMC) characterization of space station modules.