IEEJ Transactions on Fundamentals and Materials
Online ISSN : 1347-5533
Print ISSN : 0385-4205
ISSN-L : 0385-4205
Special Issue Paper
Multi-Resonator Generation by Genetic Optimization for Application to Planar-Circuit Bandpass Filters
Mikio TsujiHiroyuki DeguchiAkinori KidoMasataka Ohira
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2009 Volume 129 Issue 10 Pages 681-686


This paper proposes a design method of arbitrarily-shaped bandpass filters with multiple resonators in the limited space. Although the proposed method is based on the genetic-algorithm (GA) optimization, we newly introduce the fitness function which estimates not only the magnitude of S-parameters but also the phase characteristics in a passband. Conventional GAs without phase evaluation are difficult to design a filter having the specified number of resonators efficiently, whereas the present method can easily construct such a filter. As an example, arbitrarily-shaped planar-circuit filters with 3 and 4 resonators are optimized in the limited space and fabricated. The effectiveness of the present technique is verified by comparison of frequency responses between the calculated and the measured results.

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© 2009 by the Institute of Electrical Engineers of Japan
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