Field coupling to nonuniform and uniform transmission lines

Omid, Mahmoud; Kami, Yoshio; Hayakawa, Masashi

doi:10.1109/15.618047

Cited by 51 publications

(24 citation statements)

References 6 publications

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“…Usually the differential RF currents are measured by current probes [5], [6]. But in our experiment this is not appropriate because the probe with output coaxial cable becomes a part of the measuring object arrangement.…”

Section: Measurement Setupmentioning

confidence: 99%

Cabling Arrangement Influence on Repeatability of Immunity EMC Measurements

Hallon¹,

Bittera²,

Smiesko³

et al. 2008

Measurement Science Review

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The paper deals with the analysis of induced current of differential loops of transmission lines during immunity test against electromagnetic field measurement. The influence of geometrical configuration of cabling arrangement on induced current values is surveyed. The problem is described for the case of a short two-wire line creating differential mode loop. The current induced at both ends of the line is the characteristics observed in the performed studies. The comparison between the results of measurements on real physical line, numerical simulations and analytical solution is presented.

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Section: Measurement Setupmentioning

confidence: 99%

Cabling Arrangement Influence on Repeatability of Immunity EMC Measurements

Hallon¹,

Bittera²,

Smiesko³

et al. 2008

Measurement Science Review

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“…In the equivalent lumped source approach [5], [6] that is mathematically based on the finite difference (FD) methods, the transmission lines are segmented into small sections, each of which is represented by lumped elements, and the equivalent sources of the external EM wave are added at each small section. As the FD methods have low-order accuracy, the electrical length of each section has to be a considerably small fraction (1/12-1/20) of the minimum wave length of the signal; therefore, the equivalent models consist of an excessive number of lumped elements.…”

mentioning

confidence: 99%

Efficient Modeling of Transmission Lines With Electromagnetic Wave Coupling by Using the Finite Difference Quadrature Method

Mazumder

2007

IEEE Trans. VLSI Syst.

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Abstract-This paper proposes an efficient numerical technique, called the finite difference quadrature (FDQ) method, to model the transmission line with radiated electromagnetic (EM) wave noise coupling. A discrete modeling approach, the FDQ method adapts coarse grid points along the transmission line to compute the finite difference between adjacent grid points. A global approximation scheme is formulated in the form of a weighted sum of quantities beyond the local grid points. Unlike the Gaussian quadrature method that computes numerical integrals by using global approximation framework, the FDQ method uses a global quadrature method to construct the approximation schemes for the computation of, however, numerical finite differences. As a global approximation technique, the FDQ method has superior numerical dispersion to the finite difference (FD) method, and, therefore, needs much sparser grid points than the FD method to achieve comparable accuracy. Equivalent voltage and current sources are derived, exciting the transmission line at the grid points. Equivalent circuit models are consequently derived to represent the transmission line subject to radiated electromagnetic wave noise. The FDQ-based equivalent models can be integrated into a simulator like SPICE.Index Terms-Electromagnetic (EM) wave illuminating, external field coupling, finite difference quadrature (FDQ) method, interconnect modeling, transient simulation, transmission lines (TL).

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“…The fundamental chain matrix formulation allows an efficient numerical solution for the terminal responses when the uniform MTL is excited, whereas non-uniform lines cannot be analytically solved, in general [1,6]. So the purpose of this paper is to propose a new method for analyzing nonuniform line such as twisted conducting line.…”

Section: Introductionmentioning

confidence: 99%

“…An important aspect of electromagnetic interference (EMI) is the determination of electromagnetic coupling to TLs and the terminal responses of the lines illuminated by an incident EMF [1][2]. In general, the behavior of the induced responses can be evaluated using electromagnetic scattering theory.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Electromagnetic Field Coupling with Twisted Conducting Line by Expanded Chain Matrix

Cho¹,

Ro²,

Chung³

et al. 2013

Journal of Electrical Engineering and Technology

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-In the current paper, we propose a new modeling algorithm to analyze the coupling between an incident electromagnetic field (EMF) and a twisted conducting line, which is a kind of non-uniform line. Typically, analysis of external field coupling to a uniform transmission line (TL) is implemented by the Baum-Liu-Tesche (BLT) equation so that the induced load responses can be obtained. However, it is difficult to apply this method to the analysis of a twisted conducting line. To overcome this limitation, we used a chain matrix composed of ABCD parameters. The proposed algorithm expands the dimension of the previous chain matrix to consider the EMF coupling effectiveness of each twisted pair, which is then applied to multi-conductor transmission line (MTL) theory. In addition, we included a comparative study that involves the results of each method applied in the conventional BLT equation and new proposed algorithm in the uniform two-wire TL case to verify the proposed method.

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Field coupling to nonuniform and uniform transmission lines

Cited by 51 publications

References 6 publications

Cabling Arrangement Influence on Repeatability of Immunity EMC Measurements

Cabling Arrangement Influence on Repeatability of Immunity EMC Measurements

Efficient Modeling of Transmission Lines With Electromagnetic Wave Coupling by Using the Finite Difference Quadrature Method

Investigation of Electromagnetic Field Coupling with Twisted Conducting Line by Expanded Chain Matrix

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