DocumentCode
1467490
Title
Harmonic suppressed microstrip multistage coupled ring bandpass filters
Author
Marti, J. ; Griol, A.
Author_Institution
ETSI Telecomunicacion, Univ. Politecnica de Valencia, Spain
Volume
34
Issue
22
fYear
1998
fDate
10/29/1998 12:00:00 AM
Firstpage
2140
Lastpage
2142
Abstract
Microstrip multistage coupled ring resonator bandpass filters using stepped impedance lowpass filters to suppress higher harmonics have been investigated. Two topologies based on placing the lowpass filters either into or out of the coupled rings have been considered. A harmonic suppression ratio of >32 dB in a flat bandpass filter centred at 2.44 GHz is obtained. A practical implementation has shown very good filter characteristics with a very flat bandpass, insertion loss <1.5 dB, return loss <15 dB and harmonic suppression ratio of >32 dB
Keywords
band-pass filters; harmonics suppression; low-pass filters; microstrip filters; 1.5 dB; 15 dB; 2.44 GHz; circuit topology; harmonic suppression; insertion loss; microstrip multistage coupled ring bandpass filter; return loss; stepped impedance lowpass filter;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19981506
Filename
741355
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