A novel design methodology for simultaneously matched LNAs based on noise measure

This contribution presents a novel narrow-band design methodology for low-noise amplifiers which is based on the use of the noise measure and of the reactive interstage networks. The most interesting result is the chance of obtaining a simultaneous matching condition both at the input and at the output ports of the amplifier without sacrifying the noise factor, which is also optimized. Moreover, as a test vehicle of the presented procedure, the design of a K-band LNA is discussed which has been developed starting from the narrowband approach.