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A novel dual‐band balun using branch‐lines with open stubs
Author(s) -
Yoon Yang Seung,
Sik Cho Choon,
Lee Jae W.,
Kim Jaeheung
Publication year - 2010
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.24996
Subject(s) - balun , multi band device , microwave , electrical engineering , dual (grammatical number) , phase difference , line (geometry) , engineering , power (physics) , dual mode , topology (electrical circuits) , physics , electronic engineering , telecommunications , mathematics , voltage , antenna (radio) , geometry , quantum mechanics , art , literature
This letter presents a novel dual‐band balun using the branch‐line configuration. We establish design equations for dual‐band balun based on the even‐odd mode method. The proposed circuit operates at 2.45 GHz and 5.25 GHz. The single‐ended power is divided differentially at the balanced ports. The insertion losses (S 21 and S 31 ) show around −2.7 dB to −4.3 dB at the two different frequencies. The phase difference between the balanced ports shows maximum 3° deviation from 180°. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 642–644, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24996