Causal RLGC( Ƒ ) Models for Transmission Lines from Measured S-ParametersIEEE Transactions on Electromagnetic Compatibilty
AbstractFrequency-dependent causal RLGC(f) models are proposed for single-ended and coupled transmission lines. Dielectric loss, dielectric dispersion, and skin-effect loss are taken into account. The dielectric substrate is described by the two-term Debye frequency dependence, and the transmission line conductors are of finite conductivity. In this paper, three frequency-dependent RLGC models are studied. One is the known frequency-dependent analytical RLGC model ( RLGC-I), the second is the RLGC(f) model (RLGC-II) proposed in this paper, and the third (RLGC-III) is same as the RLGC -II, but with causality enforced by the Hilbert transform in frequency domain. The causalities of the three RLGC models are corroborated in the time domain by examining the propagation of a well-defined pulse through three different transmission lines: a single-ended stripline, a single-ended microstrip line, and an edge-coupled differential stripline pair. A clear time-domain start point is shown on each received pulse for the RLGC-II model and the RLGC-III model, where their corresponding start points overlap. This indicates that the proposed RLGC(f) model (RLGC-II) is causal. Good agreement of simulated and measured S-parameters has also been achieved in the frequency domain for the three transmission lines by using the proposed frequency-dependent RLGC (f) model.
Department(s)Electrical and Computer Engineering
Second DepartmentMaterials Science and Engineering
Keywords and Phrases
- Dielectric Materials,
- Hilbert Transforms,
- Scattering Parameters,
- Transmission Line Modeling
Document TypeArticle - Journal
Document VersionFinal Version
Rights© 2010 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.
Citation InformationJianmin Zhang, James L. Drewniak, David Pommerenke, Marina Koledintseva, et al.. "Causal RLGC( Ƒ ) Models for Transmission Lines from Measured S-Parameters" IEEE Transactions on Electromagnetic Compatibilty (2010)
Available at: http://works.bepress.com/david-pommerenke/54/