Design of Unsymmetrical Doherty Power Amplifier for 460MHz LTE-Advanced Applications
An unsymmetrical Doherty power amplifier (DPA) at 460MHz is presented in this paper.The carrier and peaking amplifier of the DPA,which base on two equal-sized devices,are matched with different networks to mitigate the performance degradation caused by the limited load modulation.Measured with continuous wave (CW),the unsymmetrical DPA saturates at an output power of 49.2dBm and achieves a drain efficiency of 51% at 6dB back-off.Using a one-carrier long term evolution advanced (LTE-Advanced) signal with 20MHz bandwidth,the unsymmetrical DPA exhibits a drain efficiency of 48.7% at an average output power of 42.1dBm,along with adjacent channel leakage ratio (ACLR) of-34.1dBc and-53.3dBc before and after digital predistortion (DPD),respectively.
unsymmetrical Doherty power amplifier output matching networks LTE-Advanced
Chuanhui Ma Wensheng Pan Youxi Tang Chaojin Qing
National Key Laboratory of Science and Technology on Communications, UESTC Chengdu, China School of Electrical and Information Engineering Xihua University Chengdu, China
国际会议
太原
英文
407-410
2013-04-06（万方平台首次上网日期，不代表论文的发表时间）