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A novel compact ultrawideband (UWB) bandpass filter using multiple‐mode resonator
Author(s) -
Chen D.,
Huang X. D.,
Cheng C. H.
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.24424
Subject(s) - resonator , microstrip , band pass filter , microwave , filter (signal processing) , electronic engineering , physics , engineering , optoelectronics , electrical engineering , telecommunications
In this letter, a novel compact ultrawideband (UWB) bandpasss filter (BPF) using the proposed multiple‐mode resonator (MMR) is presented. The MMR is composed of a conventional microstrip hairpin resonator of which the two arms are connected by a section of microstrip line and a short‐circuited point located in the middle of the hairpin resonator. Its first three resonant modes can be utilized to construct the UWB band. The tapped feeding structure has been used to realize desired tight couplings for designing the UWB BPF. The filter has been investigated numerically and experimentally. Both the simulated and measured results show that the filter has good performance, such as compact size, low‐insertion loss, small group delay variation, and improved out‐of‐band performances. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1662–1664, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24424