Noise Figure of a Balanced Amplifier

被引：4
|
作者：
Coskun, Akif Alperen [1 ]
Atalar, Abdullah [1 ]
机构：
[1] Bilkent Univ, Dept Elect & Elect Engn, TR-06800 Ankara, Turkey
来源：
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 2018年 / 65卷 / 09期
关键词：
Balanced amplifiers; noise temperature; noise figure; noise parameters;
D O I：
10.1109/TCSII.2018.2801759
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：
Noise figure expression of a balanced amplifier built with lossy divider and combiner and two imperfectly noise-matched component amplifiers is derived analytically using the method of noise waves in terms of the noise parameters of the amplifiers. We present analytical expressions for the three noise parameters of the balanced amplifier. We show that a low-noise amplifier optimized to be used as a stand-alone amplifier is not the optimum choice for the component amplifiers of a balanced amplifier. The derived expressions can be used to choose or optimize the component amplifiers.
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页码：1129 / 1133
页数：5
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