R. Neumayer

Johannes Kepler University Linz, Linz, Upper Austria, Austria

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Publications (11)2.78 Total impact

  • R. Neumayer, W. Weigel
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    ABSTRACT: As system integration evolves and clock frequencies rise, it becomes increasingly important to consider the electrical behavior of previously neglected non-ideal effects of the microwave structures and components. This paper addresses the generation of broadband SPICE-based circuit models from frequency-domain network-parameters. A combination of subspace identification algorithm and vector fitting is applied to generate passive multi-port models of microwave devices characterized by measured or simulated network parameters. Results of the proposed method applied to microwave devices are given.
    Microwaves, Radar and Wireless Communications, 2004. MIKON-2004. 15th International Conference on; 06/2004
  • Roland Neumayer, Robert Weigel
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    ABSTRACT: Electromagnetic compatibility (EMC) issues are increasingly important to the automotive industry. Problems arise from the growing use of electronic systems on the one hand and the lack of flexibility in placement or design of electronic modules on the other hand. Consequently, an accurate system-level EMC analysis is required from early stages of the vehicle design process. This paper presents a concurrent EMC simulation process that incorporates the EMC behavior of the electronic equipment in the system-level automotive EMC simulation. The proposed process helps to identify and reject potential EMC problems introduced by new technologies. This cuts the risk of EMC failure and avoids costly and time-consuming redesigns. KeywordsElectromagnetic Compatibility–Automotive EMC–EMC Modeling
    12/2003: pages 81-88;
  • R. Neumayer, A. Stelzer, R. Weigel
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    ABSTRACT: Efficient transient simulation of complex structures or components characterized by frequency-domain network parameters is of great interest in microwave theory. In this paper, two different model extraction techniques for broadband linear network characterization are discussed. A parametric complex curve fitting technique and a frequency-domain subspace identification algorithm are applied to generate passive circuit models for microwave devices characterized by measured frequency-domain port response data. By means of practical examples both methods are evaluated regarding usability, accuracy and CPU time.
    Microwave Conference, 2003. 33rd European; 11/2003
  • Roland Neumayer, Andreas Stelzer, Robert Weigel
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    ABSTRACT: Efficient transient simulation of complex structures or components characterized by frequencydomain network parameters is of great interest in microwave theory. In this paper, two different model extraction techniques for broadband linear network characterization are discussed. A parametric complex curve fitting technique and a frequency-domain subspace identification algorithm are applied to generate passive circuit models for microwave devices characterized by measured frequency-domain port response data. By means of practical examples both methods are evaluated regarding usability, accuracy and CPU time.
    Microwave Conference, 2003. 33rd European; 11/2003
  • R. Neumayer, A. Stelzer, R. Weigel
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    ABSTRACT: As system integration evolves and package densities increases, it becomes increasingly important to model non-ideal behavior of previously neglected frequency-domain effects of the microwave components and packaging interconnects. This paper addresses the generation of SPICE-based circuit models from frequency-domain response parameters. In particular, a recently developed subspace identification algorithm is applied to generate passive multi-port models of microwave devices and packages characterized by measured or simulated network parameters. Results of the application of the proposed method applied to real-world examples are given.
    Microwave and Optoelectronics Conference, 2003. IMOC 2003. Proceedings of the 2003 SBMO/IEEE MTT-S International; 10/2003
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    ABSTRACT: Electromagnetic compatibility (EMC) issues are increasingly important to the automotive industry. Potential EMC problems arise from the growing use of electronic systems on the one hand and the lack of flexibility in placement or design of electronic modules on the other hand. In this paper we present a continuous EMC simulation process based on the exchange of EMC models between car manufacturer, electronic supplier and IC developer as applied to a general automotive application. The described process fundamentally influences the introduction of new technologies in automobiles by cutting the risk of EMC-failure and avoiding expensive and time-consuming redesigns.
    Electromagnetic Compatibility, 2003 IEEE International Symposium on; 09/2003
  • R. Neumayer, A. Stelzer, R. Weigel
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    ABSTRACT: First Page of the Article
    Electromagnetic Compatibility, 2003. EMC '03. 2003 IEEE International Symposium on; 06/2003
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    ABSTRACT: The synthesis of lumped-element equivalent circuits for time-domain analysis of problems with frequency-dependent parameters is of great interest in microwave theory. This paper presents a systematic approach to generate minimal-order realizations for passive microwave circuits characterized by either admittance, impedance, or scattering-parameter data. In addition, a very efficient method to ensure inherent system properties such as stability and passivity is described. The proposed method is suitable for simulating frequency-response-based linear subnetworks in a general circuit environment consisting of lumped/distributed elements and nonlinear devices. Modeling examples for a two-, four-, and ten-port system with nonlinear and linear terminations, respectively, are given.
    IEEE Transactions on Microwave Theory and Techniques 01/2003; · 2.23 Impact Factor
  • Andreas Stelzer, Roland Neumayer, Robert Weigel
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    ABSTRACT: The generation of broadband equivalent circuit models for time-domain analysis of complex structures or components characterized by frequency-dependent network parameters is of great interest in microwave theory. In this paper, a recently developed frequency-domain subspace identification algorithm is applied to generate multi-port circuit models for passive microwave devices characterized by admittance, impedance, or scattering parameter data. The proposed method combines non-parametric minimal order realization and efficient passivity check. It is suitable for simulating linear sub-networks characterized by frequency response data in a general circuit environment consisting of lumped/distributed elements and nonlinear devices. The synthesized networks are compatible with SPICE-based circuit simulators, as is demonstrated by numerical examples.
    AEU - International Journal of Electronics and Communications 01/2003; 57(2):147-153. · 0.55 Impact Factor
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    ABSTRACT: In this paper, an efficient technique for the synthesis of broadband electrical models from multiport scattering parameter data (S-parameter) is presented. A curve fitting algorithm is applied to either measured or simulated S-parameters to generate a frequency-dependent transfer-function matrix representation of the system of interest. By means of macromodel synthesis techniques an equivalent circuit network, consisting of standard circuit elements, is derived from the transfer-function matrix representation. The synthesized networks are compatible with SPICE-based circuit simulators, as demonstrated by numerical examples for a two-port and a four-port system. The proposed method is suitable for the analysis of S-parameter based linear sub-networks in a general circuit environment consisting of lumped/distributed elements and nonlinear devices.
    Electromagnetic Compatibility, 2002. EMC 2002. IEEE International Symposium on; 09/2002
  • [Show abstract] [Hide abstract]
    ABSTRACT: The synthesis of lumped-element equivalent circuits for time-domain analysis of problems with frequency-dependent parameters is of great interest in microwave theory. This paper presents a systematic approach to generate minimal order realizations for passive microwave circuits characterized by either admittance, impedance or scattering parameter data. Also a very efficient method to ensure inherent system properties such as stability and passivity is described. Modeling examples for a two- and four-port system are given
    Microwave Symposium Digest, 2002 IEEE MTT-S International; 02/2002

Publication Stats

56 Citations
2.78 Total Impact Points

Institutions

  • 2002–2004
    • Johannes Kepler University Linz
      • • Institut für Wirtschaftsinformatik - Communications Engineering
      • • Institut für Nachrichtentechnik und Hochfrequenzsysteme
      Linz, Upper Austria, Austria