=== Gain===

An amplifier’s output/input magnitude ratio is gain. In RF, the gain is generally specified in logarithmic scale (dB).

=== SNR (Signal to Noise Ratio) ===

The ratio of signal power to the noise power, often expressed in decibels.

=== NF (Noise Figure) ===

It is measures of degradation of the SNR, caused by components in a RF signal chain.

=== Bandwidth ===