Fully-integrated linear CMOS power amplifier with proportional series combining transformer for S-Band applications

IEICE Electronics Express

Yunfeng Hu¹  Zhaohui Wu¹  Zhen Liang¹  Yang Liu¹  Haigang Wu¹  Kun Wang¹  Bin Li¹ 

[1] School of Electronic and Information Engineering, South China University of Technology

关键词: power amplifier;    transformer;    power combiner;    proportional;    power mode control;   

DOI  :  10.1587/elex.14.20171100

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

A novel proportional series combining transformer using for power amplifier (PA) is presented. Compared with balanced series combining structures, the high efficiency range is extended by sophisticated power adjusting and impedance tuning. As a proof-of-concept, a 2.5 V dual-channel PA with the proposed transformer was implemented in standard 0.18-µm CMOS process. The fabricated PA achieved a saturated output power (Psat) of 28 dBm and a maximum linear output power (P1-dB) of 26.8 dBm with the power added efficiency (PAE) of 33.5% and 31%, respectively. With power mode control, the high efficiency range exceeded 8.2 dB. The PA satisfied EVM requirements of LTE 2.3 GHz 20 MHz/64-QAM signal and WLAN 802.11g signal, respectively.

【 授权许可】

CC BY