Extension of the Transmission Line Theory Application With Modified Enhanced Per-Unit-Length Parameters

Abstract

Abstract-This paper introduces a modified enhanced transmissionline theory to account for higher-order modes while using a standard transmission line equation solver or equivalently a Baum, Liu and Tesche (BLT) equation solver. The complex per-unit-length parameters as defined by Nitsch et al. are first cast into an appropriate per-unitlength resistance, inductance, capacitance and conductance (RLCG) form. Besides, these per-unit-length parameters are modified to account for radiation losses with reasonable approximations. This modification is introduced by an additional per-unit-length resistance. The reason and explanations for this parameter are provided. Results obtained with this new formalism are comparable to those obtained using an electromagnetic full-wave solver, thus extending the capability of conventional transmission line solvers.

An Embedded Double Reference Transmission Line Theory Applied to Cable Harnesses

“…Recently, the authors have also developed a new TL model that keeps the simplicity of the classical TLT equations and leads to very satisfactory results in high frequency regions and even at resonances. This model (called the modified enhanced transmission line theory, METLT) is valid in the case of a single wire as well as for a multi-conductor transmission line [8]- [10]. Its main particularity is that its p.u.l.…”

“…Now, using the relation between the Green's function and the impedance [8]- [10], the general transformation relations of the Green's functions can be written using (23)-(25) as…”

Model of the stochastic electromagnetic field coupling to multiconductor transmission lines above a ground plane

“…The coupled currents and voltages in the MTL due to the influence of the incident electrical field can be calculated from the Baum‐Liu‐Tesche (BLT) equations . The presented transmission line model has been expanded using Chabane et al() to describe configurations where the distance between the wires and ground plane is much larger than the wavelength by including a frequency‐dependent correction factor.…”