Is noise figure dependent on input noise power?

From the above expression, we conclude that the noise figure depends on the output and input power, but is independent of the bandwidth. The Indian Space Research Organization (ISRO) will soon release the official notification for the ISRO Technical Assistant Recruitment 2022.

1. What affects noise figure?
2. How do you calculate noise power from a noise figure?
3. How is noise figure calculated?
4. What does the noise figure specify?

What affects noise figure?

The first amplifier in a chain usually has the most significant effect on the total noise figure because the noise figures of the following stages are reduced by stage gains. Consequently, the first amplifier usually has a low noise figure, and the noise figure requirements of subsequent stages is usually more relaxed.

How do you calculate noise power from a noise figure?

To calculate the effective noise power of the thermal noise injected into the system over the frequency of interest, then PSD is integrated over the band. Example: If the band of interest is 1 MHz, then the effective thermal noise power comes out as: –174 dBm / Hz + 10log10(106) = –114 dBm / 1 MHz.

How is noise figure calculated?

Noise Figure (NF) is probably the most commonly used Figure-of-Merit quantifying receiver noise performance. NF can be calculated as the ratio of the sum of the available source and receiver input referred noise power to the available source noise expressed in dB.

What does the noise figure specify?

Noise figure indicates the noise performance of a radio frequency (RF) system. Noise figure is usually measured using standard noise generators or standard signal generators. The lower the noise figure value, the better the performance of the RF system. Noise figure is also known as noise factor.