Harmonic Suppressed Dual-Band Bandpass Filter with Independently Tunable Center Frequencies and Bandwidths
- Authors
- Chaudhary, Girdhari; Jeong, Yongchae; Lim, Jongsik
- Issue Date
- Jun-2013
- Publisher
- 한국전자파학회
- Keywords
- Defected Ground Structure; Harmonic Suppression; Independently Tunable Center Frequency and Bandwidths; Tunable Dual-Band Bandpass Filter; Varactor Diode
- Citation
- Journal of Electromagnetic Engineering and Science, v.13, no.2, pp 93 - 103
- Pages
- 11
- Journal Title
- Journal of Electromagnetic Engineering and Science
- Volume
- 13
- Number
- 2
- Start Page
- 93
- End Page
- 103
- URI
- https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/13674
- DOI
- 10.5515/JKIEES.2013.13.2.93
- ISSN
- 2234-8409
2234-8395
- Abstract
- This paper presented a novel approach for the design of a tunable dual-band bandpass filter (BPF) with independently tunable passband center frequencies and bandwidths. The newly proposed dual-band filter principally comprised two dual-mode single band filters using common input/output lines. Each single BPF was realized using a varactor-loaded transmission line resonator. To suppress the harmonics over a broad bandwidth, a defected ground structure was used at the input/output feeding lines. From the experimental results, it was found that the proposed filter exhibited the first passband center frequency tunable range from 1.48 to 1.8 GHz with a 3-dB fractional bandwidth (FBW) variation from 5.76% to 8.55%, while the second passband center's frequency tunable range was 2.40 to 2.88 GHz with a 3-dB FBW variation from 8.28% to 12.42%. The measured results of the proposed filters showed a rejection level of 19 dB up to more than 10 times the highest center frequency of the first passband.
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Collections - College of Engineering > Department of Electrical Engineering > 1. Journal Articles
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