BROADBAND WILKINSON BALUN USING PURE LEFT-HANDED TRANSMISSION LINE
- Authors
- Ryu, Young-Ho; Park, Jae-Hyun; Lee, Jeong-Hae; Tae, Heung-Sik
- Issue Date
- Jul-2010
- Publisher
- WILEY-BLACKWELL
- Keywords
- metamaterial; pure left handed transmission line; balun
- Citation
- MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, v.52, no.7, pp.1665 - 1668
- Journal Title
- MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
- Volume
- 52
- Number
- 7
- Start Page
- 1665
- End Page
- 1668
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/20751
- DOI
- 10.1002/mop.25242
- ISSN
- 0895-2477
- Abstract
- Utilizing the opposite phase shift property of a microstrip line (MSL) and a pure left-handed transmission line (PLH TL), the broadband Wilkinson balun is designed. The PLH TL without a right-handed (RH) branch is designed using effectively negative elements obtained by a cross connection of vias to ground. The PLH TL gives inherently phase-advanced response properties because of negative phase velocity, whereas a conventional MSL has a phase-lag response. The property of a broadband left-handed branch of a PLH TL applies to the implementation of broadband balun. The proposed balun has a good return loss, a good isolation between output ports. an equal-power division, and a 180 degrees +/- 10 degrees phase difference in a wide fractional bandwidth of similar to 71%. Furthermore. the wideband balun that has the fractional bandwidth of 107.8% is theoretically designed with the modified PLH TL having four unit cells. (C) 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1665-1668, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25242
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Collections - College of Engineering > School of Electronic & Electrical Engineering > 1. Journal Articles
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