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Compact semilumped elliptic‐function low‐pass filter using microstrip meander line
Author(s) -
Lee Ju Gab,
Lee Wu Seong,
Ryu Jae Jong,
Moon Yeon Kwan,
Jang Joong Ho,
Kim Ha Chul,
Choi Hyun Chul
Publication year - 2007
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.22545
Subject(s) - microstrip , stopband , cutoff frequency , low pass filter , meander (mathematics) , attenuation , filter (signal processing) , stripline , elliptic filter , inductance , electrical engineering , band pass filter , electronic engineering , materials science , physics , acoustics , band stop filter , optics , engineering , mathematics , voltage , geometry
For the size reduction and sharp attenuation of the low‐pass filter in lower RF frequency range, a semilumped elliptic‐function low‐pass filter was proposed using microstrip meander line, chip capacitor, and radial stubs. To estimate more accurate inductance of microstrip meander line, it was modeled in an inhomogeneous dielectric environment, and then the calculated inductance was compared with the conventional case. To provide an additional attenuation pole in stop‐band, radial stubs were added to the proposed structure. The 3‐order low‐pass filter has a cutoff frequency of 1GHz and dimension of 14.6 × 16.3 mm 2 on the substrate with a relative dielectric constant of 3.38. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1777–1779, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22545