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UWB bandpass filter with quad‐notched bands using arrow‐shaped resonators
Author(s) -
Guo Qingxin
Publication year - 2015
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.29000
Subject(s) - band pass filter , resonator , high pass filter , materials science , bandwidth (computing) , prototype filter , filter (signal processing) , microwave , butterworth filter , acoustics , m derived filter , mechanical filter , electronic engineering , low pass filter , optics , physics , optoelectronics , electrical engineering , engineering , telecommunications
An UWB bandpass filter with quad‐notched bands is presented in this letter. The filter is comprised of a seven‐pole pseudo‐bandpass filter which is based on optimum distributed highpass filters and eight arrow‐shaped resonators which provide four notched bands. The effects of the physical parameters of the arrow‐shaped resonators on the S parameter of the presented filter are detailed investigated. The presented filter is fabricated and measured after it has been meticulously designed on a RO4350B substrate whose dimensions are 50 × 12 × 0.508 mm 3 . Both simulation and experimental results are provided and compared with each other. Simulation results show that the notched frequencies can be altered by changing the physical parameters of the arrow‐shaped resonators. Measurement results show that, within 2.89–10.78 GHz, which is 3‐dB bandwidth of the bandpass filter, four notched bands centered at 3.53, 5.35, 5.85, and 8.08 GHz with the notch depth is higher than 16 dB are obtained. The current distributions of the notched frequencies and the frequency within the pass band are also investigated. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:959–963, 2015