Bandwidth-enhanced lumped-element absorptive bandstop filter topology and its application to LTCC bandstop filter design
- Authors
- Lee, Juseop; Kim, Byungguk; Lee, Kangho; Chappell, William J.
- Issue Date
- 12월-2015
- Publisher
- CAMBRIDGE UNIV PRESS
- Keywords
- Filters; Passive components and circuits
- Citation
- INTERNATIONAL JOURNAL OF MICROWAVE AND WIRELESS TECHNOLOGIES, v.7, no.6, pp.691 - 698
- Indexed
- SCIE
SCOPUS
- Journal Title
- INTERNATIONAL JOURNAL OF MICROWAVE AND WIRELESS TECHNOLOGIES
- Volume
- 7
- Number
- 6
- Start Page
- 691
- End Page
- 698
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/91670
- DOI
- 10.1017/S1759078714001147
- ISSN
- 1759-0787
- Abstract
- In this paper, we show a second-order (four-resonator) absorptive bandstop filter circuit topology which gives a larger bandwidth compared to a first-order topology. Due to the absorptive characteristic, it creates a large attenuation at the center frequency using low-Q resonators. Since low-Q resonators can be used in generating a large attenuation, small-size resonators can be employed in bandstop filter design. Analytic design equations are provided so that a higher-order absorptive bandstop filter can be designed analytically. It is also shown that the second-order filter topology exhibits a better frequency selectivity having a same bandwidth. The proposed filter topology has been applied to a design of a miniaturized low-temperature co-fired ceramic bandstop filter with low-Q resonators. The Q-factor of the lumped-element resonators has been chosen to be 5 for demonstration.
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Collections - Graduate School > Department of Computer Science and Engineering > 1. Journal Articles
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