L band low noise amplifier

Low noise amplifiers are the key components of the receiver front end, it has been widely used in microwave communication, radar, electronic warfare, and a variety of high-precision microwave measurement system and its performance directly affects the performance of entire receiving system, so it is essential to develop excellent low noise amplifier. In this paper, it has designed a LNA which has good performances at 2GHz. The measurement results performs a high gain (>;15dB), fine flatness(<;0.5dB), good noise characteristics(<;1dB) and fine input/output return loss (S₁₁<;-15dB,S₂₂<;-15dB)in the frequency range of the design.