Low Noise Amplifier, or RF (Radio Frequency) amplifier, increases the amplitude of weak signals so that the RF receiver can work on the signal while introducing as little noise as possible. An LNA is a critical component in RF front-end circuitry. It has been found that after the receiver's antenna, the first stage or stages in the signal chain contribute the most to the total noise of an RF front-end circuit. Any noise then introduced by the remainder of the signal chain is then made smaller in comparison to the amplified signal, thus preserving signal integrity.
