Research on optimizing the noise figure of low noise amplifier method via bias and frequency

doi:10.1016/S1005-8885(10)60093-3

中国邮电高校学报(英文) ›› 2011, Vol. 18 ›› Issue (4): 118-122.doi: 10.1016/S1005-8885(10)60093-3

Research on optimizing the noise figure of low noise amplifier method via bias and frequency

张立军¹,李力南²

1. 苏州大学
2. 北京交通大学

收稿日期:2010-12-29 修回日期:2011-05-31 出版日期:2011-08-31 发布日期:2011-08-24
通讯作者: 李力南 E-mail:lnli@bjtu.edu.cn

Research on optimizing the noise figure of low noise amplifier method via bias and frequency

Lijun Zhang¹,Li-Nan LI

Received:2010-12-29 Revised:2011-05-31 Online:2011-08-31 Published:2011-08-24
Contact: Li-Nan LI E-mail:lnli@bjtu.edu.cn

摘要/Abstract

摘要：

In this paper, we present the design of an integrated low noise amplifier (LNA) for wireless local area network (WLAN) applications in the 5.15–5.825 GHz range using a SiGe BiCMOS technology. A novel method that can determine both the optimum bias point and the frequency point for achieving the minimum noise figure is put forward. The method can be used to determine the optimum impedance over a relevant wider operating frequency range. The results show that this kind of optimizing method is more suitable for the WLAN circuits design. The LNA gain is optimized and the noise figure (NF) is reduced. This method can also achieve the noise match and power match simultaneously. This proposal is applied on designing a LNA for IEEE 802.11a WLAN. The LNA exhibits a power gain large than 16 dB from 5.15 to 5.825 GHz range. The noise figure is lower than 2 dB. The OIP3 is 8 dBm. Also the LNA is matched to 50 Ω input impedance with 6 mA DC current for differential design.

关键词:

LNA, SiGe BiCMOS, noise figure, WLAN

Abstract:

Key words:

LNA, SiGe BiCMOS, noise figure, WLAN

中图分类号:

Lijun Zhang Li-Nan LI. Research on optimizing the noise figure of low noise amplifier method via bias and frequency[J]. Acta Metallurgica Sinica(English letters), 2011, 18(4): 118-122.

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Research on optimizing the noise figure of low noise amplifier method via bias and frequency

Research on optimizing the noise figure of low noise amplifier method via bias and frequency

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