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   Compute the noise of a cascade series.
   Has a default input with three entries.
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   Form:
   [t, f] = TNoiseCascade( d )
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   ------
   Inputs
   ------
   d             (:)  Data structure
                      .t  (1,1) Temperature (deg-K)
                      .g  (1,1) Gain (dB)
                        
   -------
   Outputs
   -------
   t             (1,1)  Temperature
   f             (1,1)  Noise figure
                        
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	References:	Maral, G. and M. Bousquet. (1998.) Satellite Communications
               Systems. Wiley. pp. 17-18.
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