Design and Implementation of Millimeter-Wave Multiple Balun in CMOS Process

• Main Authors: Wen-Yun Lin, 林芸汶
• Other Authors: Yo-Sheng Lin
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/69723286391023852801

碩士 === 國立暨南國際大學 === 光電科技碩士學位學程在職專班 === 103 === A planar miniature spiral CMOS dual balun with unequal couple-line width for millimeter-wave transceiver is reported. The dual balun can be applied to a star mixer or a four-way power amplifier (PA) for four-way equal power dividing. In contrast to the traditional four-way PA that uses three Wilkinson power dividers for four-way equal power dividing, the proposed PA achieves smaller chip area, higher output power and higher power-added-efficiency. The dual balun occupies a small chip area of 0.126 mm×0.164 mm (i.e. 0.02 mm2) and achieves S11 smaller than 10 dB for frequencies of 60.3~86.8 GHz. For frequencies of 60~70 GHz, the dual balun achieves S21 of 7.712~ 7.843 dB, S31 of 7.659~ 7.816 dB, S41 of 7.672~ 7.801 dB, S51 of 7.052~ 7.245 dB, magnitude of amplitude imbalance (MAI) of 0.02~0.156 dB and phase difference (PD) of 170.73°~172.41° for ports 2~3, and MAI of 0.476~0.706 dB and PD of 173.49°~174.65° for ports 4~5. In addition, for frequencies of 90~100 GHz, the dual balun achieves S21 of 9.128~ 10.195 dB, S31 of 9.123~ 10.191 dB, S41 of 8.998~ 10.093 dB, S51 of 9.168~ 10.526 dB, MAI of 0.003~0.115 dB and PD of 178.06°~180.66° for ports 2~3, and MAI of 0.17~0.433 dB and PD of 177.61°~177.98° for ports 4~5. The state-of-the-art results of the proposed dual balun indicate that it is suitable for millimeter-wave communication systems.