Noise Loss and Contribution in the Lossy Two-port Networks in Cascade

Xiao Chang-de

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Noise Loss and Contribution in the Lossy Two-port Networks in Cascade

更新时间：2025-12-08

- Noise Loss and Contribution in the Lossy Two-port Networks in Cascade
- Acta Electronica Sinica Issue 2, Pages: 71-77(1980)
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- Published：1980
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[1]肖长德.级联二端口有耗网络中噪声的损耗和发生[J].电子学报,1980(02):71-77.

Xiao Chang-de. Noise Loss and Contribution in the Lossy Two-port Networks in Cascade[J]. Acta Electronica Sinica, 1980, (2): 71-77.
[1]肖长德.级联二端口有耗网络中噪声的损耗和发生[J].电子学报,1980(02):71-77. DOI：

Xiao Chang-de. Noise Loss and Contribution in the Lossy Two-port Networks in Cascade[J]. Acta Electronica Sinica, 1980, (2): 71-77. DOI：

摘要

噪声在级联二端口有耗网络中传输时

每一级网络除了损耗前一级传输过来的噪声功率外

还要给出网络本身的噪声。只有确定了网络中损耗和发生的噪声

才能准确地进行噪声测量。本文利用资用功率传输系数概念来分析网络中噪声的损耗和发生

推导出级联二端口有耗网络中噪声传输的计算式。该计算式已被用于确定热噪声标准源的资用噪声温度。

Abstract

In noise measurement the problem of noise transmission in the two-port networks in cascade is frequently met with. Each stage of the network itself will contribute its noise whereas it will Jose the noise power transmitted from the former stage. The noise can be exactly measured only when its loss and contribution in the network have been defined.This article analyses the loss and generation of noise in the network by means of the concept of the available power transmission coefficient

and derives the formula for noise transmission in the lossy . two-port networks in cascade. This formula has been applied to determine the available noise temperature of the thermal noise standard source.

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