Dynamic Load Modulation With a Reconfigurable Matching Network for Efficiency Improvement Under Antenna Mismatch

被引：12
|
作者：
Sanchez-Perez, Cesar [1 ,2 ]
de Mingo, Jesus [1 ,2 ]
Garcia-Ducar, Paloma [1 ,2 ]
Luis Carro, Pedro [1 ,2 ]
Valdovinos, Antonio [1 ,2 ]
机构：
[1] Univ Zaragoza, Aragon Inst Engn Res I3A, Zaragoza 50018, Spain
[2] Univ Zaragoza, Dept Elect & Commun Engn, Zaragoza 50018, Spain
来源：
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 2011年 / 58卷 / 12期
关键词：
Efficiency; linearity; load modulation; power amplifier (PA); reconfigurable matching network (RMN);
D O I：
10.1109/TCSII.2011.2172524
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：
This brief presents the application of a reconfigurable matching network (RMN) to improve the efficiency of an RF power amplifier (PA) using dynamic load modulation techniques under different antenna mismatch conditions. By changing the RMN state, a near-optimal output impedance is presented to the PA, achieving high efficiency for all input-driven levels. Simulations show efficiency enhancement, while nonlinear distortion can be mitigated using digital predistortion. It will be also shown that under severe mismatch conditions, using an RMN, significant efficiency and linearity improvements can be achieved.
引用
收藏
页码：892 / 896
页数：5
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