The LNA function, play an important role in the receiver designs. Its main function is to amplify extremely low signals without adding noise, thus preserving the required Signal-to-Noise Ratio (SNR) of the system at extremely low power levels. Amplification is one of the most basic and prevalent RF circuit functions in modern RF and microwave systems. Microwave transistor amplifiers are rugged, low cost, and reliable and can easily be integrated in both hybrid and monolithic integrated circuitry. To amplify the received signal in a RF system, a Low Noise Amplifier (LNA) is required.