Mojtaba Charchian - Noshirvani University of Technology Babol, Islamic Republic of Iran
Bijan Zakeri - Noshirvani University of Technology Babol, Islamic Republic of Iran
Hossein Miar-Naimi - Noshirvani University of Technology Babol, Islamic Republic of Iran

This paper presents a method to design a wideband noise figure (NF) low noise amplifier (LNA) for 3.5-4.5 GHz. The quality factor method has been used to achieve betterbandwidth of noise figure. To design low noise amplifier circuit in Radio Frequency (RF), trade-off between noise figure, gain,stability and input return loss should be considered. Two configurations of amplifiers are presented. The first configuration is a single-stage amplifier with input and outputmatching networks according to noise and gain consideration respectively. It has the noise figure of 1.062db and the gain of10.288db. The second configuration is a cascade amplifier that, in addition to the first one, an inter-stage matching network is used for it. It has the noise figure of1.123db and the gain of 20.317db. Agilent Advanced Design System (ADS) EM/circuit co-simulation has been used to perform simulation.

Low Noise Amplifier, Wideband, Noise Figure