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Quasi quarter SIW‐mode resonator and its application to sierpinski fractal filter design
Author(s) -
Zhang Sheng,
Fu XueDong,
Wang Ting,
Liu FaLin,
Wang HaiTing,
Liu Hai
Publication year - 2016
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.29764
Subject(s) - resonator , sierpinski carpet , fractal , sierpinski triangle , band pass filter , passband , filter (signal processing) , acoustics , microwave , coupling (piping) , physics , materials science , optics , engineering , electrical engineering , telecommunications , mathematics , mathematical analysis , metallurgy
In this letter, a new kind of quasi quarter SIW resonator (QQSIWR) using Sierpinski fractal defected structure is presented first. Comparing with SIW resonator, this novel resonator has lower resonant frequency (f 0 ) and acceptable unloaded quality (Q u ) value, while maintaining almost unchanged electromagnetic fields distributions. The frequency characteristics and Q u of this resonator is investigated under different fractal sizes. To validate the properties of QQSIWR, a miniature cross‐coupled bandpass filter (BPF) with a size reduction over 88% is proposed and optimized using Sierpinski fractal structure and cross coupling technology. It can produce asymmetrical frequency response by generating a transmission zero (TZ) on the high side of passband. A prototype of the filter is fabricated and measured, and the measured results are in good agreement well with the simulated ones. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1176–1179, 2016