Dual-Band Negative Group Delay Circuit Using λ/4 Composite Right/Left-Handed Short StubsDual-Band Negative Group Delay Circuit Using λ/4 Composite Right/Left-Handed Short Stubs
- Other Titles
- Dual-Band Negative Group Delay Circuit Using λ/4 Composite Right/Left-Handed Short Stubs
- Authors
- 최흥재; 문태수; 정용채; 임종식; 엄순영; 정영배
- Issue Date
- 2011
- Publisher
- KOREAN INST ELECTROMAGNETIC ENGINEERING & SCIENCE
- Keywords
- Composite Right/Left-Handed; Dual-Band; Negative Group Delay; WCDMA; WiMAX.; Composite Right/Left-Handed; Dual-Band; Negative Group Delay; WCDMA; WiMAX.
- Citation
- Journal of Electromagnetic Engineering and Science, v.11, no.2, pp 76 - 81
- Pages
- 6
- Journal Title
- Journal of Electromagnetic Engineering and Science
- Volume
- 11
- Number
- 2
- Start Page
- 76
- End Page
- 81
- URI
- https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/16879
- ISSN
- 2671-7255
- Abstract
- In this paper, a novel design for a dual-band negative group delay circuit (NGDC) is proposed. Composite right/left- handed (CRLH) λ/4 short stubs are employed as a dual-band resonator. A CRLH λ/4 short stub is composed of a typical transmission line element as the right-handed component and a high-pass lumped element section as the left- handed component. It is possible to simultaneously obtain open impedances at two separate frequencies by the combination of distinctive phase responses of the right/left-handed components. Negative group delay (NGD) can be obtained at two frequencies by using dual-band characteristics of the CRLH stub. In order to achieve a bandwidth extension, the proposed structure consists of a two-stage dual-band NGDC with different center frequencies connected in a cascade. According to the experiment performed, with wide-band code division multiple access (WCDMA) and worldwide interoperability for microwave access (WiMAX), NGDs of —3.0±0.4 ns and —3.1±0.5 ns are obtained at 2.12 ~2.16 GHz and 3.46~3.54 GHz, respectively.
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