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WSEAS TRANSACTIONS on
ELECTRONICS

Issue 5, Volume 4, May 2007
ISSN: 1109-9445

Title of the Paper: A Comprehensive CAD for Microstrip, Coaxial and Waveguide Circuits

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Authors: Said H. Ibrahim

Abstract: This paper presents a visual user-oriented comprehensive computational program used for a wide range of microstrip, coaxial, and waveguide applications. For microstrip application it is used for active and passive circuits design such as microstrip amplifiers, oscillators, couplers, and mixers. For waveguide application, it is used for the design of rectangular waveguide oscillators and amplifiers with post and disc assembly used for the tuning of the active element (IMPATT or Gunn diode). For coaxial application, it is used for the design of coaxial amplifiers and oscillators with the design of the tuning circuit of the active element. The new developed program is compared to other available commercial ones.

Keywords: Computational Microstrip Circuit Design, Microwave Circuits, Computer Aided Design

Title of the Paper: Proposal of Numerically Robust Algorithm for Stochastic Systems Identification

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Authors: Ginalber Luiz De Oliveira Serra

Abstract: This work proposes a recursive weighted ELS algorithm for system identification by applying numerically robust orthogonal Householder transformations. The properties of the proposed algorithm show it obtains acceptable results in a noisy environment: fast convergence and asymptotically unbiased estimates. Comparative analysis with others robust methods well known from literature are also presented.

Keywords: Numerical Method, Modeling, Simulation, Discrete Time Dynamic Systems, Parameter Estimation, Stochastic Systems