- #1

Kartik.Sulakh

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## Homework Statement

A receiving system consists of an antenna with an effective noise temperature of

70 K. This antenna is connected to a microwave front end of noise figure 7 dB

via a feeder. The feeder’s specific attenuation function is 0.2 dB/10m. The actual

feeder length is 2 m. Calculate the carrier to noise power spectral density at the

output of the microwave front end if the received carrier power at the antenna

terminals is -100 dBm?

## Homework Equations

I'm assuming it as C

_{min}= -174 + NF + 10Log

_{10}B + C/N

Where,

NF = Noise Figure,

B = Bandwidth, and C/N is a Carrier-to-Noise Ratio which is asked?

## The Attempt at a Solution

C

_{min}= -110 dBm

Noise Figure (NF) = 7 dB & Struck up in knowing Bandwidth (B)

length of feeder is 2 meters,

feeder’s specific attenuation function is 0.2 dB/10m, What Next?