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作 者:季连庆[1] 徐志明[1] 周健义[1] 翟建锋[1]
机构地区:[1]东南大学毫米波国家重点实验室,南京210096
出 处:《Journal of Southeast University(English Edition)》2013年第2期125-128,共4页东南大学学报(英文版)
基 金:The National Natural Science Foundation of China(No.60702163);the National Science and Technology Major Project(No.2010ZX03007-002-01,2011ZX03004-003)
摘 要:A digital predistorted class-F power amplifier (PA) using Cree GaN HEMT CGH40010 operating at 2. 12 GHz is presented to obtain high efficiency and excellent linearity for wideband code-division multiple access ( WCDMA ) applications. Measurement results with the continuous wave (CW) signals indicate that the designed class-F PA achieves a peak power-added efficiency (PAE) of 75. 2% with an output power of 39.4 dBm. The adjacent channel power ratio (ACPR) of the designed PA after digital predistortion (DPD) decreases from -28. 3 and -27. 5 dBc to -51.9 and -54. 0 dBc, respectively, for a 4-carrier 20 MHz WCDMA signal with 7. 1 dB peak to average power ratio (PAPR). The drain efficiency (DE) of the PA is 37. 8% at an average output power of 33. 3 dBm. The designed power amplifier can be aoolied in the WCDMA system.采用Cree公司的GaN晶体管CGH40010,设计了一个工作在2.12GHz,用于WCDMA的带有数字预失真的高效率F类功率放大器,以实现其高效率和高线性度.经过连续波信号测试,设计完成的F类功率放大器实现了75.2%的功率附加效率和39.4dBm的最大输出功率.对峰均比为7.1dB、带宽为20MHz的4载波WCDMA信号,经过数字预失真线性化技术后,F类功放在33.3dBm的平均输出功率下,输出信号的邻信道功率比分别由-28.3和-27.5dBc降低到-51.9和-54.0dBc.功放的漏极效率达到37.8%.所设计的功率放大器可用于WCDMA系统中.
关 键 词:digital predistortion peak power-addedefficiency drain efficiency adjacent channel power ratio EFFICIENCY LINEARITY class-F power amplifier
分 类 号:TN722[电子电信—电路与系统]
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