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A new method to obtain total power receiver equivalent noise temperature

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5 Author(s)
Aja, B. ; Dpto. Ing. de Comunicaciones, Cantabria Univ., Santander, Spain ; Pascual, J.P. ; de la Fuentel, L. ; Gallegos, Julio
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A method to obtain more accurate noise temperature of a radiometer at room temperature using commercial noise sources is presented. A low noise amplifier used in a radiometer system has an equivalent noise temperature which adds the contributions of its equivalent noise temperature at each frequency over its operating frequency range. The Y-factor has been improved and generalised to take into account the dependence with frequency of the noise source and the transfer function of a receiver. This dependence is especially relevant for broadband radiometer systems. A commercial simulator is used to validate the method and a Ka-band total power radiometer is characterized following the proposed method.

Published in:

Microwave Conference, 2003. 33rd European  (Volume:1 )

Date of Conference:

7-9 Oct. 2003