Paper Info
Title
Quasi-Reflectionless Microstrip Bandpass Filters Using Bandstop Filter for Out-of-Band Improvement
Abstract
In this brief, a class of microstrip bandpass filters (BPFs) with quasi-reflectionless behavior on both input and output ports is presented. A single-port reflectionless BPF is proposed by shunt connecting one bandstop filter cell namely one-cell. This one-cell single-port reflectionless BPF is made up of a high impedance transmission line as a series band-pass filter section and a shunt-connected band-stop section with resistively terminated. In the operation passband, the bandpass filter section is used to transmit spectral energy, while the bandstop section is regarded as an open circuit. Besides, the out-of-band energy is absorbed by resistively component in the bandstop filter section. In order to achieve better out-of-band reflectionless characteristic, a two-cell two-port reflectionless BPF is constructed by shunt connecting two cells at input/output ports and one series bandpass filter section in the center. In addition, a three-cell reflectionless BPF is designed to further verify the improvement of out-of-band performance. Finally, two-cell and three-cell two-port reflectionless BPFs are fabricated and tested to verify the design concept. The measured results of these two reflectionless BPFs are in good agreement with the simulation ones.
Year
DOI
Venue
2020
10.1109/TCSII.2019.2946915
IEEE Transactions on Circuits and Systems II: Express Briefs
Keywords
DocType
Volume
Band-pass filters,Filtering theory,Impedance,Topology,Microstrip filters,Microwave filters,Radio frequency
Journal
67
Issue
ISSN
Citations 
10
1549-7747
1
PageRank 
References 
Authors
0.39
0
9
Name
Order
Citations
PageRank
Cong Luo110.39
Sai-Wai Wong2299.62
Jing-Yu Lin352.93
Yang Yang44111.18
Yin Li511.06
Xu-Zhou Yu610.72
Lin-Ping Feng761.33
Zhi-Hong Tu810.72
Lei Zhu97724.55