Novel Design Space of Load Modulated Continuous Class-B/J Power Amplifier

被引：27

作者：

Du, Xuekun ^{[1
,2
]}

You, Chang Jiang ^{[3
]}

Cai, Jingye ^{[1
]}

Helaoui, Mohamed ^{[2
]}

Ghannouchi, Fadhel M. ^{[2
]}

Zhao, Yulong ^{[2
]}

Li, Xiang ^{[2
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Informat & Software Engn, Chengdu 610054, Sichuan, Peoples R China

[2] Univ Calgary, iRadio Lab, Calgary, AB T2N 1N4, Canada

[3] Univ Elect Sci & Technol China, Sch Commun & Informat Engn, Chengdu 611731, Sichuan, Peoples R China

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2018年 / 28卷 / 02期

关键词：

Class-B/J mode; continuous mode; design space; load modulated (LM); wideband power amplifier (PA); ENHANCEMENT; EFFICIENCY;

D O I：

10.1109/LMWC.2017.2779883

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A novel design space of load modulated (LM) continuous Class-B/J power amplifiers (PAs) is proposed, and a detailed mathematical analysis is presented. The combination of LM technique and continuous mode is introduced to enhance the wideband performance of LM PAs. An inversely proportional relationship between Z(L) and C-out is derived, which indicates that the nonlinear C-out can affect the optimal load impedances at output power backoff (OPBO) and the design parameter beta should be appropriately adjusted. The measured results of a PA prototype show that the PAE is 39%-45% under LM when OPBO = 5 dB across 1.6-2.4 GHz. Compared with the same PA with fixed V-var, the proposed PA with optimum V-var at 2 GHz achieves a PAE improvement with 11% when OPBO = 5 dB.

引用

页码：156 / 158

页数：3

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