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Microstrip multistopband filter based on prefractal space‐filling curve
Author(s) -
Caramanica Federico
Publication year - 2014
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.28116
Subject(s) - space mapping , microwave , filter (signal processing) , cad , computer aided design , fractal , space (punctuation) , function (biology) , microstrip , computer science , algorithm , electronic engineering , topology (electrical circuits) , mathematical optimization , engineering , mathematics , mathematical analysis , engineering drawing , telecommunications , mechanical engineering , electrical engineering , evolutionary biology , biology , operating system , computer vision
In this letter, a method for the design of miniaturized multistopband filters is presented. This methodology exploits multiple resonance behavior of a small‐size prefractal geometries. The considered fractal structures based on space‐filling curve geometry and then, after recasting the design problem as an optimization one by defining a suitable cost function, is optimized by an unsupervised procedure, the gravitational search algorithm, which is a recent and interesting stochastic optimization method. To assess the effectiveness of this approach, a filter with three stopbands has been designed, numerically assessed, and realized. The obtained results are in good agreement with the numerical simulations and this confirms the capabilities of the proposed method as a microwave Computer Aided Design (CAD) tool. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:450–455, 2014