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A novel compact meandering stripline balun for balanced amplifiers with Bluetooth application
Author(s) -
Lee ShuChuen,
Tsang KimFung
Publication year - 2002
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.10627
Subject(s) - balun , bluetooth , stripline , electrical engineering , amplifier , microwave , return loss , insertion loss , engineering , electronic engineering , transceiver , bandwidth (computing) , telecommunications , wireless , antenna (radio) , cmos
A novel compact meandering stripline balun for Bluetooth (2.4 GHz) application is reported. The proposed balun is an integral part of the printed circuit board (PCB). Such design reduces the cost and the manufacturing complexity. Analysis using Microwave Office showed that return loss was better than 15 dB and insertion loss was less than 0.6 dB for the full Bluetooth bandwidth. An integrated push–pull power amplifier (PA) of a Bluetooth transceiver that incorporates the balun at its output was designed and implemented. Measurement showed that the average output power of the PA using meandering stripline balun among the 79 channels was −0.86 dBm with a 2‐dB imbalance. Thus, performance was adequate for Bluetooth application and the design was feasible. In addition, a size reduction of 65% was obtained when compared to a half‐wavelength balun. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 423–425, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10627