Accession Number : AD0431496


Title :   ON THE ANTENNA NOISE AND ITS MINIMIZATION,


Corporate Author : ILLINOIS UNIV URBANA ENGINEERING EXPERIMENT STATION


Personal Author(s) : Lo,Y T


Report Date : Sep 1963


Pagination or Media Count : 65


Abstract : In this investigation a method of estimating various antenna noises is discussed. In the general case when noise sources are in the near field of the antenna the problem become exceedingly difficult. For this only a high frequency approximation is suggested; it is similar to the general scattering theory of perfectly conducting scatterers. For a given antenna and a given noise temperature distribution in space, an optimum aperture distribution, discrete or continuous, can be obtained by maximizing the signal to noise ratio with a reasonable value of the antenna Q-factor. The solution to this problem is reduced to that of an eigen-value of a matrix equation. As an example, the antenna noise temperature of the University of Illinois Radio Telescope is approximately determined by the method discussed in Section 2. (Author)


Descriptors :   *ANTENNAS , *NOISE(RADIO) , NOISE(RADIO) , MATHEMATICAL PREDICTION , NOISE(RADIO) , POWER , TEMPERATURE , SIGNAL TO NOISE RATIO , SENSITIVITY , ANTENNAS


Distribution Statement : APPROVED FOR PUBLIC RELEASE