SHOT-NOISE IN RESISTIVE-DIODE MIXERS AND THE ATTENUATOR NOISE MODEL

被引：17
作者：
KERR, AR
机构：
[1] National Aeronautics and Space Administration, Goddard Space Flight Center, Institute for Space Studies, New York
来源：
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 1979年 / 27卷 / 02期
关键词：
D O I：
10.1109/TMTT.1979.1129574
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：
The representation of a pumped exponential diode, operating as a mixer, by an equivalent lossy network, is reexamined. It is shown that the model is correct provided the network has ports for all sideband frequencies at which (real) power flow can occur between the diode and its embedding. The temperature of the equivalent network is η/2 times the physical temperature of the diode. The model is valid only if the series resistance and nonlinear capacitance of the diode are negligible. Expressions are derived for the input and output noise temperature and the noise-temperature ratio of ideal mixers. Some common beliefs concerning noise-figure and noise-temperature ratio are shown to be incorrect. Copyright © 1979 by The Institute of Electrical and Electronics Engineers, Inc.
引用
收藏
页码：135 / 140
页数：6
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