最小噪音匹配Optimal Source Impedance to Trade-Off Power and Noise and to Achieve a Desired S11
Optimal Noise Source Impedance: Zn=r n+jxn, NF=NFmin Optimal Gain Source Impedance Zp=r p+jxp, G=Gmax, S11=0
Constant S11 contour Desired Source Impedance Z=r+jx S11=Desired Specification
useful functions and identities Units Constants
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Table of Contents
I. IV. IX. Introduction Inputs Copyright and Trademark Notice
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Introduction
In the design of a low noise amplifier,LNA, or mixer driver stage there exists an optimal source source impedance to provide the maximum power transfer into the transistor and thus the maximum gain. There also exists an optimal source impedance, Znopt, to provide the minimum noise figure for the circuit.……
