DocumentCode
62700
Title
Comments on “A Quasi Elliptic Function 1.75–2.25 GHz 3-Pole Bandpass Filter With Bandwidth Control”
Author
Zhiyuan Zhao
Author_Institution
Inst. of Commun. Eng., PLAUST, Nanjing, China
Volume
62
Issue
11
fYear
2014
fDate
Nov. 2014
Firstpage
2843
Lastpage
2843
Abstract
In the above paper, a three-pole filter with tunable frequency and bandwidth is proposed based on a simple topology. The nonadjacent resonator coupling is introduced to generate a zero at the lower band for adjusting the bandwidth. Although the results are interesting, it appears that the design equations are mislabeled and the equivalent circuit model is inaccurate.
Keywords
band-pass filters; elliptic filters; equivalent circuits; resonator filters; 3-pole bandpass filter; bandwidth control; equivalent circuit model; frequency 1.75 GHz to 2.25 GHz; nonadjacent resonator coupling; quasi elliptic function; three-pole filter; Bandwidth; Couplings; Equivalent circuits; Integrated circuit modeling; Mathematical model; Resonant frequency; Topology; Bandpass filter; nonadjacent resonator coupling; tunable bandwidth filter; tunable filter;
fLanguage
English
Journal_Title
Microwave Theory and Techniques, IEEE Transactions on
Publisher
ieee
ISSN
0018-9480
Type
jour
DOI
10.1109/TMTT.2014.2352603
Filename
6894635
Link To Document