Improvement of power amplifier efficiency by reactive Chireix combining, power back-off and differential phase adjustment

被引：24
|
作者：
Gerhard, W. [1 ]
Knoechel, R. [1 ]
机构：
[1] Univ Kiel, Microwave Lab, Kaiserstr 2, D-24143 Kiel, Germany
来源：
2006 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST, VOLS 1-5 | 2006年
关键词：
basestation; Chireix; efficiency; LDMOS; LINC; outphasing; rf power amplifier; WCDMA;
D O I：
10.1109/MWSYM.2006.249783
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：
An interesting effect of output power back-off (OPBO) efficiency improvement is presented which is present if 2 power amplifiers (PA) utilizing a reactive output Chireix coupling are combined with input power back-off and differential phase adjustment for maximum efficiency peaking. The capability of significant efficiency improvement at power back-off is demonstrated and validated by means of simulations and measurements. The new design method delivers a power added efficiency (PAE) of 48% at 6dB OPBO and 35% at 10dB OPBO for a 25.7W Si-LDMOS PA at 2.14 GHz for a WCDMA basestation application.
引用
收藏
页码：1887 / +
页数：2
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