ISSN (Print): 2278-5140, Volume-2, Issue – 1, 2013 19 The Design and Simulation of 2.294dB Noise-Figure RF Wideband PHEMT LNA Employing 2-Stage Cascade with Single Feedback Pramod K B & Praveen K B Department of Electronics Engineering, Jain University, Bangalore, Karnataka, India Department of Telecommunication, Dr. Ambedkar Institute of Technology, Bangalore, Karnataka, Inida E-mail : pramod63putta@putta@gmail.com, prvn.guru@gmail.com Abstract – This paper presents the design and simulation of 2-stage low noise amplifier(LNA) for the application of VHF and UHF range used for mobile satellite communications by using microstrip technology and focusing on development of low noise amplifier operating on the band of frequencies from 50M-1GHz by using Enhancement Mode Pseudomorphic HEMT ATF-53189 from Avago Technologies. The designed circuit uses lumped elements to implement the matching networks and purpose 2-stage is to achieve considerable gain. Input and output matching network is to produces 50Ω impedance for maximum power transfer. The target simulation are gain (S21) with >22 dB, noise figure (NF) with <4dB throughout the band from 50M -1GHz. A 2- stage LNA has successfully designed and simulated with 22 dB forward gain, 2.294 dB noise figure by using Advance Wireless Revolution (AWR) Microwave office tool. Keywords – Advance Wireless Revolution, Low Noise Amplifier, Radio Frequency, Noise Figure, And Pseudomorphic High Electron Mobility Transistor I. INTRODUCTION The low noise amplifiers (LNA) is a key electronic device used to filter out the noise of input signals received at the front end of communication systems, by possibly very weak signals from the antenna for the reduction of external as well as internal noise of the circuit [1]. Low noise amplifier is used in a wide variety of applications in RF communication systems such as wireless computer networks, mobile phones, and satellite receiver. Its plays as the significant components in the receiving end of the any communication system and its performance measured based on the Noise Figure, Gain in a Dynamic range, and stability. II. SPECIFICATION, RESEARCH AND COLLECTED DATA The five fundamental parameters of the LNA are: Gain, Bandwidth, Noise Figure, Linearity, and Power Consumption. The goal of designer is to minimize noise figure by considerable high gain with moderate linearity and establishing good impedance matching to other transceiver blocks. The additional constraint of low power consumption is imposed in portable systems. In this reference [2] C. J. Jeong, they have presented an ultra-low power CG LNA design for WSN application. By adopting current-reused self biasing and forward body biasing techniques, the ultra-low power LNA design can be achieved. The measurement results show 1 to 3 GHz wide input matching, a 13.9 dB peak gain, 5.14 dB NF and -9.8dBm IIP3 while consuming 140 uA from a 1.5 V supply. Reference of [3] Ping Zhou, in their paper they have presented a W-band low noise amplifier module using MMIC LNA chip has been successfully developed. The achieved linear gain of the LNA module is more than 23 dB in the frequency range from 92 to 94 GHz, and the noise figure at room temperature is about 5 dB. Reference of [4] Tan Thiam Loong, in their paper a wideband LNA is demonstrated gain of 13.7 dB, 13.5 dB to 12.6 dB and 2.98 dB to 3.12 dB for the operating frequencies 1.575 GHz, 2.11 GHz to 2.17 GHz and 2.4 GHz to 2.48 GHz, respectively. The minimum gain achieved in this large of frequencies is of 10.3 dB while the maximum NF is 3.12 dB. Total power consumption is 14.4 mW.