中国科学院微电子研究所,北京,100029
网络出版:2008-12-25,
纸质出版:2008
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李志强, 张 健, 张海英. 带有小型化Balun的C波段单片GaAs pHEMT单平衡电阻性混频器[J]. 电子学报, 2008,36(12):2454-2457.
LI Zhi-qiang, ZHANG Jian, ZHANG Hai-ying. C-Band Monolithic GaAs pHEMT Resistive Single-Balanced Mixer with Miniaturized Balun[J]. Acta Electronica Sinica, 2008, 36(12): 2454-2457.
本文介绍了一种带有小型化无源Balun的C波段单片GaAs pHEMT单平衡电阻性混频器.Balun 采用集总—分布式结构
使其长度与常用
λ/4
耦合线Balun相比缩小了11倍
大大降低了将无源Balun应用于C波段单片集成电路中所需的芯片尺寸.混频器采用单平衡电阻性结构
在零功耗的情况下实现了良好的线性和口间隔离性能.测试结果显示
在固定中频160MHz
本振输入功率0dBm条件下
在3.5~5GHz RF频带内
最小变频损耗为8.3dB
1dB压缩点功率为8.0dBm
LO至IF之间的隔离度为38dB.
A C-band GaAs pHEMT single-balanced resistive mixer with miniaturized balun is presented.By using lumped-distributed structure
the coupled-line length was reduced by a factor of 11 compared with the conventional
λ/4
coupled-line balun.This balun was then used in a resistive mixer to transform the input single-ended signal into differential.The mixer achieved good linearity and port isolation performance with zero power consumption.Test results showed that
with a fixed IF of 160 MHz and 0dBm LO power
the minimum conversion loss is 8.3dB in 3.5~5GHz RF frequency range.The measured 1dB compression point is 8dBm and the LO-to-IF isolation is better than 38dB.
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