A high power active circulator using GaN MMIC power amplifiers  

作　　者：顾黎明 车文荃 Fan-Hsiu Huang Hsien-Chin Chiu 

机构地区：[1]School of Electronic and Optical Engineering,Nanjing University of Science and Technology [2]Department of Electronics Engineering,Chang Gung University

出　　处：《Journal of Semiconductors》2014年第11期114-118,共5页半导体学报（英文版）

基　　金：supported by the National Science Foundation for Distinguished Young Scholars of China(No.61225001)

摘　　要：This paper presents a 2.4 GHz hybrid integrated active circulator consisting of three power amplifiers and three PCB-based Wilkinson power dividers. The power amplifiers were designed and fabricated in a standard 0.35-μm AlGaN/GaN HEMT technology, and combined with three traditional power dividers on FR4 using bonding wires. Due to the isolation of power dividers, the isolation between three ports is achieved; meanwhile, due to the unidirectional characteristics of the power amplifiers, the nonreciprocal transfer characteristic of the circulator is realized. The measured insertion gain of the proposed active circulator is about 2-2.7 dB at the center frequency of 2.4 GHz, the isolation between three ports is better than 20 dB over 1.2-3.4 GHz, and the output power of the designed active circulator achieves up to 20.1-21.2 dBm at the center frequency.This paper presents a 2.4 GHz hybrid integrated active circulator consisting of three power amplifiers and three PCB-based Wilkinson power dividers. The power amplifiers were designed and fabricated in a standard 0.35-μm AlGaN/GaN HEMT technology, and combined with three traditional power dividers on FR4 using bonding wires. Due to the isolation of power dividers, the isolation between three ports is achieved; meanwhile, due to the unidirectional characteristics of the power amplifiers, the nonreciprocal transfer characteristic of the circulator is realized. The measured insertion gain of the proposed active circulator is about 2-2.7 dB at the center frequency of 2.4 GHz, the isolation between three ports is better than 20 dB over 1.2-3.4 GHz, and the output power of the designed active circulator achieves up to 20.1-21.2 dBm at the center frequency.

关 键 词：hybrid gallium nitride （GaN） monolithic microwave integrated circuit （MMIC） active circulator power amplifier power divider 

分 类 号：TN722.75[电子电信—电路与系统] TN713.8