工程设计学报2018，Vol.25Issue(2)：237-244,8.DOI:10.3785/j.issn.1006-754X.2018.02.016
平衡式E/F类功率放大器的设计与实现
Design and realization of balanced Class E/F power amplifier
摘要
Abstract
In order to solve the problem of low efficiency and large loss of input and output return in the designing process of power amplifier,abalanced power amplifier operating in 1.5 GHz was designed.The 3 dB directional coupler was used to distribute and synthesize the RF(radio fre-quency)signal,which greatly reduced the voltage standing wave ratio(VSWR)of input and out-put node of the power amplifier,and the harmonic control network of the inverse-Class F power amplifier was introduced into the matching circuit of the Class E power amplifier.The input and output impedance of the transistor was obtained by the use of ADS for load/source pull simula-tion.Considering the parasitic parameters of the transistor,the second and the third harmonic were matched to open and short respectively at drain of the transistor,and the second harmonic suppression circuit was added into the input circuit to further enhance the efficiency of the power amplifier.The GaN HEMT device CGH40010F transistor was selected for ADS software circuit simulation,and Rogers4350b high-frequency material was used to produce the test board of power amplifier.After making simulation optimization and practical test to the power amplifier, measure results demonstrated that when input power was 28 dBm,the amplifier test board deliv-ered 41.54 dBm output power with drain efficiency of 76.99% and power additional efficiency (pAE)reached 73.59%,input and output node voltage standing wave ratio was less than 2, while having a high efficiency bandwidth of 160 MHz and the maximum output power increased by 3 dB than that of the single tube amplifier.The experimental results had some difference com-pared with the simulation data,but there was still a good consistency to meet the design index, which verified feasibility of the design methodology.This design method improves design efficien-cy of the power amplifier,due to the advantages of high efficiency and low return loss,so that it has broad application prospects in present highly efficient and green energy saving RF microwave communication system.关键词
E类功率放大器/逆F类功率放大器/GaN/平衡结构/驻波系数Key words
Class Epower amplifier/inverse-Class Fpower amplifier/Gan/balanced structure/voltage standing wave ratio(VSWR)分类
信息技术与安全科学引用本文复制引用
南敬昌,张鹏俊..平衡式E/F类功率放大器的设计与实现[J].工程设计学报,2018,25(2):237-244,8.基金项目
国家自然科学基金资助项目(61372058) （61372058）
辽宁省高校重点实验室项目(LJZS007) （LJZS007）
