TITLE:
Intellectual CAD for Three-Tier Wide Band WDR Filters
AUTHORS:
Alexander G. Yushchenko, Dovlet S. Mamedov, Denis M. Zaytsev
KEYWORDS:
Intellectual CAD; Waveguide-Dielectric Filters; Expert System; Optimization Methods; Wide Band Pass
JOURNAL NAME:
Wireless Engineering and Technology,
Vol.3 No.1,
January
12,
2012
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.