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Broadband balun for monolithic microwave integrated circuit application
Author(s) -
Yoo Hyoungsuk,
Lee SeHee,
Kim Hongjoon
Publication year - 2012
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.26468
Subject(s) - balun , broadband , return loss , microwave , monolithic microwave integrated circuit , transmission line , electrical engineering , insertion loss , electronic engineering , integrated circuit , microwave transmission , engineering , telecommunications , materials science , antenna (radio) , cmos , amplifier
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 ± 9.5° phase difference at the outputs, whereas the maximum insertion loss is −1.78 dB, and the minimum return loss is −10.2 dB at all three ports, yet the circuit size is merely 12 × 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. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:203–206, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26468