An on-chip low-loss reconfigurable transformer for multimode power amplifiers

被引：0
|
作者：
Son, Dong-Hee [1 ]
Ahn, Hyunjin [1 ]
Nam, Ilku [1 ]
Lee, Ockgoo [1 ]
机构：
[1] Pusan Natl Univ, Sch Elect & Comp Engn, Busan 609735, South Korea
来源：
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2019年 / 61卷 / 04期
基金：
新加坡国家研究基金会;
关键词：
insertion loss; lumped model; multimode; power amplifier; reconfigurable; transformer;
D O I：
10.1002/mop.31683
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 article presents an on-chip reconfigurable transformer to obtain low loss performance in both high-power (HP) and low-power (LP) modes. In this configuration, according to the output power level, the number of segments of the primary winding is selectively chosen to change the input impedance of the transformer. The multimode operation of the proposed transformer is analyzed using the proposed segment-based lumped model. In addition, the corresponding complete segment-based lumped model is developed to estimate its performance accurately. The reconfigurable transformer is fabricated using GaAs HBT technology. The modeled and measured results are consistent. The measured insertion losses at 2.4 GHz are 0.96 and 0.85 dB in the HP and LP modes, respectively. The measured impedance transformation is from a load of 50 to 7.7 omega in the HP mode, while it is from a load of 50 to 21.1 omega in the LP mode.
引用
收藏
页码：943 / 947
页数：5
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