Nonorthogonality relations between complex hybrid modes: an application for the leaky-wave analysis of laterally shielded top-open planar transmission lines
Research Group
Grupo de Electromagnetismo Aplicado a las Telecomunicaciones (GEAT)Knowledge Area
Teoría de la Señal y las ComunicacionesPublication date
2004-03Publisher
IEEE Microwave Theory and Techniques SocietyBibliographic Citation
GÓMEZ TORNERO, José Luis, ÁLVAREZ MELCÓN, Alejandro. Nonorthogonality relations between complex hybrid modes: an application for the leaky-wave analysis of laterally shielded top-open planar transmission lines. IEEE Transactions on Microwave Theory and Techniques, 52 (3): 760-767, Marzo 2004. ISSN 0018-9480Keywords
Acoplamiento electromagnéticoFuga de ondas
Guía de ondas plana
Modo asociado de análisis
Electromagnetic coupling
Leaky wave
Plane waveguide
Associated mode of analysis
Abstract
In this paper, the orthogonality relations between
complex modes are investigated to demonstrate the coupling effect
that exists along a transverse direction ( -axis) between TE and
TM hybrid modes when power storage, loss, or leakage occur
in the longitudinal direction ( -axis) of a transmission line. As an
example, the parallel-plate waveguide modes are used to study
a laterally shielded top-open microstrip line. The study of leaky
waves is a very interesting application of the novel orthogonality
relations derived in this paper. This study is carried out using the
correct and incorrect orthogonality formulations, showing that
physically valid results are obtained only when the orthogonality
relations derived in this paper are properly introduced in the
formulation. A physical explanation of this novel coupling effect
between TE andTM hybrid modes with respect to the -direction
is given in terms of inhomogeneous plane waves. Comparisons
with previous results for a laterally ...
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