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Stepped impedance resonator bandpass filters using tapped‐line for controlling spurious response
Author(s) -
Weng MinHung,
Chen WuNan,
Huang TsungHui,
Hung ChengYuan,
Wu HungWei
Publication year - 2004
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.20010
Subject(s) - band pass filter , resonator , spurious relationship , microwave , electrical impedance , insertion loss , center frequency , transmission line , electronic engineering , acoustics , filter (signal processing) , engineering , electrical engineering , materials science , physics , computer science , telecommunications , machine learning
A stepped impedance resonator bandpass filter was designed and implemented, combining with the tapped‐line structure. The measured bandpass filters at the center frequency of 2.0 GHz has the characteristics: the insertion loss S 21 = −2.98 dB, BWR is 15.1%, and the transmission zeros occurred at 2.62 GHz with −48.5 dB. Especially, the wider rejection of −20 dB can be obtained form 2.4 to 8.2 GHz from the proper position of tapped‐line I/O. The designed filter shows the excellent abilities to shift and suppress the spurious response by properly designing the structure of the resonator. The proposed filter was designed and fabricated, and the performances closely matched the simulation results. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 40: 481–484, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20010