The Experts below are selected from a list of 282 Experts worldwide ranked by ideXlab platform
C.-w. Hsue - One of the best experts on this subject based on the ideXlab platform.
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Time-domain Scattering Parameters of an exponential transmission line
IEEE Transactions on Microwave Theory and Techniques, 1991Co-Authors: C.-w. HsueAbstract:The Scattering Parameters of an exponential line are studied in detail in both the frequency and time domains. By taking the causality condition into consideration, the time-domain Scattering Parameters are cast in a rapid-convergence power series. Each term of the power series represents a signal component generated by the exponential line when the signal travels a round trip. The time-domain Scattering Parameters of an exponential line lay the foundation for studies of interaction between nonuniform lines and linear/nonlinear loads, and pulse waveform alteration in the time domain. >
José E. Schutt-ainé - One of the best experts on this subject based on the ideXlab platform.
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Comparative study of convolution and order reduction techniques for blackbox macromodeling using Scattering Parameters
IEEE Transactions on Components Packaging and Manufacturing Technology, 2011Co-Authors: José E. Schutt-ainé, Jilin Tan, Patrick Goh, Yemeserach Mekonnen, Feras Hawari, Ping Liu, Wenliang DaiAbstract:In this paper, a fast convolution method using Scattering Parameters is presented for the macromodeling of blackbox multiport networks. The method is compared to model-order reduction passive macromodeling techniques in terms of robustness and computational efficiency. When Scattering Parameters are used as the transfer functions, convolution calculations can be accelerated to achieve superior performance and the resulting procedure leads to a robust, accurate, and efficient macromodel generation scheme. This paper examines the formulation of the convolution method. Model-order reduction techniques are reviewed and benchmark comparisons are performed.
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Interconnect simulation using order reduction and Scattering Parameters
1998 Proceedings. 48th Electronic Components and Technology Conference (Cat. No.98CH36206), 1Co-Authors: Wendemagegnehu T. Beyene, José E. Schutt-ainéAbstract:This paper demonstrates the use of Scattering Parameters for efficient and accurate simulation of transmission lines. First, a low-order rational approximation scheme is applied to the s Parameters of the line system, next an appropriate reference system is chosen to optimize the formulation. Finally, the low-order rational approximations of the Scattering Parameters are directly implemented in conventional time-domain simulator using recursive convolution. Experimental results are used to validate the computer simulations.
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Scattering Parameters for the simulation of transmission-line networks
IEEE International Symposium on Circuits and Systems, 1Co-Authors: José E. Schutt-ainéAbstract:Scattering Parameters are used for the analysis of transmission-line networks. Single-line analysis and an extension to multiple coupled lines are discussed. The accuracy of the Scattering parameter method is evaluated by comparing a computer simulation with a laboratory experiment. Good agreement is observed. >
Sami Barmada - One of the best experts on this subject based on the ideXlab platform.
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Comments on "Deficiencies in the way Scattering Parameters are Taught"
IEEE Transactions on Education, 2006Co-Authors: Sami BarmadaAbstract:Equivalent representation of multiport circuits by the use of Scattering Parameters is of fundamental importance, especially in the microwave circuits area. However, in most cases, only a few pages of textbooks are devoted to this topic; based on the author's experience, the students find it somehow difficult to understand the physical meaning of Scattering Parameters (while they find other representations, like Z, Y, hybrid, or transmission Parameters, easy to understand). For this reason, the contribution given by Sadiku (IEEE Trans. Educ., Vol. 46, no. 3, Aug. 2003, pp. 399-404) is very important. Furthermore, in Sadiku's paper, three nontrivial examples are reported, through which the students can gain understanding of this fundamental tool. In two of the three examples, some points are unclear; this correspondence analyzes this lack of clarity.
Won-kwang Park - One of the best experts on this subject based on the ideXlab platform.
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Localization of Small Anomalies via the Orthogonality Sampling Method from Scattering Parameters
Electronics, 2020Co-Authors: Seongje Chae, Chi Young Ahn, Won-kwang ParkAbstract:We investigate the application of the orthogonality sampling method (OSM) in microwave imaging for a fast localization of small anomalies from measured Scattering Parameters. For this purpose, we design an indicator function of OSM defined on a Lebesgue space to test the orthogonality relation between the Hankel function and the Scattering Parameters. This is based on an application of the Born approximation and the integral equation formula for Scattering Parameters in the presence of a small anomaly. We then prove that the indicator function consists of a combination of an infinite series of Bessel functions of integer order, an antenna configuration, and material properties. Simulation results with synthetic data are presented to show the feasibility and limitations of designed OSM.
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Real-Time Tracking of Moving Anomaly From Scattering Parameters
2018Co-Authors: Won-kwang Park, Kwang-jae Lee, Seong-ho SonAbstract:This study aims to design an imaging function based on Kirchhoff migration for real-time tracking of a moving anomaly from Multi-Static Response (MSR) matrix whose elements were measured Scattering Parameters. Based on the representation formula for the Scattering parameter in the presence of an anomaly, we established a relation between the imaging function and an infinite series of Bessel functions of integer order and the total number of dipole antennas. Experimental results with real-data are presented to show the feasibility of the designed imaging function.
Patrice Féron - One of the best experts on this subject based on the ideXlab platform.
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Mode Coupling and Scattering Parameters in a Parity-Time Symmetric Resonant Integrated Coupler
IEEE Journal of Quantum Electronics, 2018Co-Authors: Yann Boucher, Patrice FéronAbstract:We investigate theoretically, in the frame of coupled-mode theory, a parity-time symmetric directional coupler inserted into a symmetric resonant cavity, all ports being terminated by four identical lossless reflectors. The Scattering Parameters are expressed under analytic closed forms in several equivalent bases, underlining the fact that PT Symmetry can be thought of as mode coupling between the old Eigenmodes of the passive structure. We also derive the oscillation threshold of such a complex cavity, and comment upon this apparent paradox: as a matter of fact, a laser effect is not necessarily expected from a device with more losses than gain.
