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Intellectual CAD for Three-Tier Wide Band WDR Filters

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Author(s): Denis M. Zaytsev | Dovlet S. Mamedov | Alexander G. Yushchenko

Journal: Advances in Molecular Imaging
ISSN 2161-6728

Volume: 03;
Issue: 01;
Start page: 30;
Date: 2012;
Original page

Keywords: Intellectual CAD | Waveguide-Dielectric Filters | Expert System | Optimization Methods | Wide Band Pass

ABSTRACT
The paper presents an original physical points of an intellectual CAD system designing for three-tier wide band waveguide-dielectric filters with LM modes. On the basis of formalized physical knowledge about the behavior of coupled resonators, the CAD system analyses electromagnetic signal passing through a filter structure and makes decisions gradually approaching the optimal filter design through a series of changes in its geometry. From a mathematical point of view, this approach is an alternative to well-known optimization methods and is also very promising for solving the problem of finding a global extremum of an objective function. We also include the filter optimization results obtained with the CAD system for the frequency range 23 - 81 GHz, band widths up to 30% and insertion losses less than 0.5 dB.
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