Performance Comparison of RF CMOS Low Noise Amplifiers in 0.18-m technology scale

This paper presents the design theory of conventional single-ended LNA and differential LNA based onCMOS technology. The design concepts give an useful indication to the design trade-offs associated withNF, gain and impedance matching. Four LNA’s have been designed using technological design rules ofTSMC 0.18-μm CMOS technology and this work mainly proposed for IEEE 802.11a applications. With1.8V supply voltage, the proposed LNA’s achieve a gain higher than 19dB, a noise figure less than 4dB andimpedance matching less than -10dB at 5GHz frequency. The goal of this paper is to highlight the efficientLNA architecture for achieving simultaneous gain, noise and input matching at low supply voltage. Theperformance of all LNA’s are analysed and compared using Agilent’s Advanced Design System ElectronicDesign Automation tools.