A wideband stepped-impedance rectangular-ring resonator bandpass filter with multiple notched bands

A configuration of wideband bandpass filter (BPF) with multiple notched bands is presented. Proposed BPF is based on stepped-impedance resonator. By utilising dual stepped-impedance resonators in folded topology a rectangular-ring resonator is formed. Two notched bands in the passband are achieved w...

Full description

Saved in:
Bibliographic Details
Published in:International journal of electronics 2014-07, Vol.101 (7), p.994-1005
Main Authors: Nakhlestani, Amir, Movahhedi, Masoud, Hakimi, Ahmad
Format: Article
Language:English
Subjects:
Asymmetry
bandpass filter
Bandpass filters
Bands
Bandwidths
Filters
Frequencies
Joining
Noise levels
notched band
Rejection
Resonators
ring resonator
stepped-impedance
Topology
Wideband
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A configuration of wideband bandpass filter (BPF) with multiple notched bands is presented. Proposed BPF is based on stepped-impedance resonator. By utilising dual stepped-impedance resonators in folded topology a rectangular-ring resonator is formed. Two notched bands in the passband are achieved without using asymmetrical coupled lines. In other words, the filter configuration is capable of producing notched bands. It should be noted that additional information on filter performance and design is presented. Measurement results are presented to approve propounded filter characteristics. The measured passband of the second proposed filter is from 3.68 to 10.2 GHz with insertion loss of -1.76 dB in the first passband at the centre frequency of 4.45 GHz. The measured notched band frequencies are about 5.45 and 7.95 GHz with rejection of -21.77 and -20.82 dB, respectively. The return loss in the passband is better than -11.4 dB.
ISSN:0020-7217
1362-3060
DOI:10.1080/00207217.2013.805390