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Broadband balun for monolithic microwave integrated circuit application

✍ Scribed by Hyoungsuk Yoo; Se-Hee Lee; Hongjoon Kim

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
448 KB
Volume
54
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

We present a compact and broadband balun based on the concept of a synthetic left‐handed transmission line and right‐handed transmission line.The compact balun uses lumped, discrete LC elements only to reduce the circuit size dramatically. For the frequency range of 0.6–1.2 GHz, this circuit maintains 180 Β± 9.5Β° phase difference at the outputs, whereas the maximum insertion loss is βˆ’1.78 dB, and the minimum return loss is βˆ’10.2 dB at all three ports, yet the circuit size is merely 12 Γ— 8 mm^2^. As far as we know, this is the smallest broadband balun reported in the literature, and the size can be further reduced, if the circuit is made with a monolithic microwave integrated circuit technology. Β© 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:203–206, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26468

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