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Tournament-Shaped Magnetically Coupled Power-Combiner Architecture for RF CMOS Power Amplifier

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4 Author(s)
Changkun Park ; Korea Adv. Inst. of Sci. & Technol., Daejeon ; Dong Ho Lee ; Jeonghu Han ; Songcheol Hong

A tournament-shaped magnetically coupled power-combiner architecture for a fully integrated RF CMOS power amplifier is proposed. Various 1 : 1 transmission line transformers are used to design the power combiner. To demonstrate the new architecture, a 1.81-GHz CMOS power amplifier using the tournament-shaped power combiner was implemented with a 0.18-mum RF CMOS process. All of the matching components, including the input and output transformer, were fully integrated. The amplifier achieved a drain efficiency of 38% at the maximum output power of 31.7 dBm.

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:55 ,  Issue: 10 )