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Total noise power of the system is P=_____

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Total noise power of the system is P=_____

(a) k(TA+TR)B

(b) k(TA+TR)/B

(c) k(TR)B

(d) kB/Tsys

I had been asked this question in a job interview.

The query is from Antenna Noise Temperature topic in chapter Antenna Parameters – II of Antennas

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The correct option is (a) k(TA+TR)B

The explanation is: The overall noise temperature of the system is the sum of noise temperature of antenna TA  and the receiver surrounding TR.

⇨ Total noise power of the system is P= k(TA+TR)B

⇨ K is Boltzmann’s constant and B is the bandwidth

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