Broadband coupled-line balun on a defected ground structure

초록

A novel microstrip balun topology based on common-mode rejection is introduced. The balun is constructed with a short section of coupled line placed above a defected ground structure. Measurements on a PCB sample indicate a successful conversion from single end to differential mode showing 0.7 dB of insertion loss at 3 GHz along with 1-dB bandwidth that extends from 0.7 to 5.6 GHz. (c) 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2575-2577, 2012; this online at wileyonlinelibrary.com. DOI 10.1002/mop.27120

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