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Dual‐band bandpass filters based on dual‐mode hilbert fractal resonator
Author(s) -
CrnojevicBengin Vesna,
Zemlyakov Kirill,
Jankovic Nikolina,
Vendik Irina
Publication year - 2013
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.27667
Subject(s) - resonator , band pass filter , multi band device , ground plane , planar , microwave , fractal , physics , electronic engineering , optics , materials science , optoelectronics , engineering , electrical engineering , computer science , telecommunications , mathematics , mathematical analysis , computer graphics (images) , antenna (radio)
We propose a compact planar dual‐mode resonator based on a Hilbert fractal curve that operates at two arbitrary frequencies. The resonator is used to design two types of dual‐band bandpass filters for WLAN applications, which exhibit a good trade‐off between compact size and high performances, with the overall sizes ranging from 0.22 × 0.21 to 0.44 × 0.1 guided wavelengths and measured insertion losses from 0.38 to 2.5 dB. At the same time, the fabrication of filters is quite simple and requires no modifications in the ground plane or use of vias. In addition, the proposed resonator is used to design single‐band filters as well. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1440–1443, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27667