Enhancement of transmission line theory for finite-length non-uniform transmission lines using scattering theory
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Date
2018-12-30
Authors
Gunawardana Sooriyaarachchige Don, Manuja Shamith
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Abstract
Classical multiconductor transmission line (MTL) theory is valid for infinitely-long, uniform
transmission lines whose cross sectional dimensions are very small compared to the minimum wavelength. Therefore, non-uniformities such as bends, crossings, conductors of different lengths, or electrically distant conductors are not represented in classical MTL models. The proposed scattering based coupling (SBC) method, which uses electromagnetic
scattering theory to model mutual coupling between conductors, has been used to model
differently-lengthed and electrically distant parallel conductors. Scattered field transmission
line (SFTL) model which regards both self and mutual fields to be scattered fields, has
been used to model lossless, frequency-independent conductors, that crosses each other at
variable crossing angles and for bent conductors at variable bending angles. The SBC and
SFTL models have been compared with full-wave thin wire and full-wave, 3D-FEM solvers,
respectively.
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Keywords
Transmission Lines, Scattering Theory