Bandwidth Tuning of Resonator Filter Using Reduced Number of Tunable Coupling Structures
- Authors
- Lee, Boyoung; Nam, Seunggoo; Lee, Juseop
- Issue Date
- 4월-2019
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Bandwidth tuning; cavity resonator; interresonator coupling; topology
- Citation
- IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, v.67, no.4, pp.1496 - 1503
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
- Volume
- 67
- Number
- 4
- Start Page
- 1496
- End Page
- 1503
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/66522
- DOI
- 10.1109/TMTT.2019.2898860
- ISSN
- 0018-9480
- Abstract
- This paper presents a new bandwidth tuning theory for Butterworth-response resonator filters. The presented theory shows that the bandwidth of odd-order Butterworth filters can be varied by adjusting only two interresonator coupling structures while maintaining a perfect impedance matching at the center frequency. In other words, this paper presents an analytic approach to reduce the number of tunable coupling structures when designing a bandwidth-tunable resonator filter. Theories for third-and fifth-order direct-coupled filters are discussed in detail, and it is shown that only two interresonator coupling structures are required to be tunable. In addition, for verifying the new bandwidth tuning method, a fifth-order cylindrical cavity filter has been designed, fabricated, and measured. The fabricated filter has an 11:1 bandwidth tuning range.
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Collections - Graduate School > Department of Computer Science and Engineering > 1. Journal Articles
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