Low noise amplifier for software defined radio

Abstract

Software Defined Radio (SDR) or Software Radio is one of the most promising technologies for the mobile and wireless communications. SDR refers to a class of reprogrammable and reconfigurable radios. This paper describes the design of Wideband Low Noise Amplifier (LNA) for SDR receiver's RF Frontend. The proposed Wideband LNA exhibits very low noise figure and high gain over the frequency range of 1.4 GHz to 2.6 GHz. The input and output return loss is found to be less than -10 dB. Also, the amplifier is unconditionally stable over the entire frequency range. This frequency range will cover different standards like Global Positioning System (GPS), GSM-1800, Universal Mobile Telecommunications System (UMTS), Bluetooth etc.