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A folded substrate integrated waveguide cavity filter using novel negative coupling
Author(s) -
Wang Rui,
Zhou XiLang,
Wu LinSheng
Publication year - 2009
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.24181
Subject(s) - band pass filter , return loss , microwave , materials science , bandwidth (computing) , filter (signal processing) , coupling (piping) , optoelectronics , waveguide filter , substrate (aquarium) , electronic engineering , engineering , prototype filter , electrical engineering , low pass filter , telecommunications , oceanography , antenna (radio) , metallurgy , geology
This article presents a cross‐coupled folded substrate integrated waveguide (FSIW) cavity bandpass filter. A novel type of negative coupling between FSIW cavities has been investigated and demonstrated. A prototype of four‐pole FSIW cavity bandpass filter has been designed, fabricated with multilayer standard printed circuit board process. The filter has good selectivity which is demonstrated by the measured results, indicating 7.5% bandwidth and more than 14‐dB return loss, with good agreement obtained when compared with the simulated ones. In addition, the rejection band of this filter is quite wide, implying good harmonic rejection. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 866–871, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24181