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Microwave Engineering -- Noise figure of a cascade

  1. Mar 12, 2015 #1
    I am taking a course in Microwave Engineering and we were given the following problem to solve
    An amplifier with a gain of 12 dB, a bandwidth of 150 MHz, and a noise figure of 4 dB feeds a
    receiver with a noise temperature of 900 K. Find the noise figure of the overall system.
    Need I to use the following relation?:
    Fcas=F1 + (F2-1)/G = F1 + (T/T0)/G? Where T=900 K and T0=290 K.
    I'd appreciate some guidance.
  2. jcsd
  3. Mar 13, 2015 #2

    rude man

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    You don't need any guidance since you got it right the 1st time! :smile: (assuming your G = 101.2).
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