DocumentCode :
2763652
Title :
A novel bandpass filter design using cascaded CPW/Slotline ring resonators with tapered step impedance CPW fed structure
Author :
Tai, Chiung-Feng ; Chen, I-Chia ; Chiou, Hwann-Kaeo
Author_Institution :
Nat. Central Univ., Jhongli
fYear :
2006
fDate :
12-15 Dec. 2006
Firstpage :
1557
Lastpage :
1560
Abstract :
A novel bandpass filter using the cascaded CPW/slotline ring resonators with tapered step impedance CPW fed structure is proposed. This fed structure not only provides two transmission zeros for the bandpass filter at the lower and upper passband edges but also makes the filter with very compact size. The CPW/Slotline ring resonators utilize a pair of anti-coupled lines to create poles. Moreover, the central frequency and coupling coefficient can be obtained by adjusting the anti-coupling gap. In this paper, two kinds of bandpss filters with CPW/Slotline ring resonators are demonstrated which have fabricated on conventional FR-4 substrate. The measured insertion loss is less than 3 dB and the return loss is better than 15 dB across 10% bandwidth. The measured results show good agreement with HFSS simulated results.
Keywords :
band-pass filters; coplanar waveguides; resonators; slot lines; FR-4 substrate; anti-coupling gap; bandpass filter design; cascaded CPW; slotline ring resonators; tapered step impedance CPW fed structure; transmission zeros; Band pass filters; Coplanar waveguides; Couplings; Filtering theory; Frequency; Impedance; Optical ring resonators; Passband; Resonator filters; Slotline; Slotine ring resonator; cascaded ring resonator; coplanar waveguide fed structure; coplanar waveguide ring resonator;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Microwave Conference, 2006. APMC 2006. Asia-Pacific
Conference_Location :
Yokohama
Print_ISBN :
978-4-902339-08-6
Electronic_ISBN :
978-4-902339-11-6
Type :
conf
DOI :
10.1109/APMC.2006.4429703
Filename :
4429703
Link To Document :
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