Design and Comparison of Wide Band and Narrow Band Low Noise Amplifier for Wireless Communication Systems

Abstract

The receiver of wireless communication system has a key component called LOW NOISE AMPLIFIER. For wireless communication the signal at receiver point is comparatively week, so good gain and noise performance are necessary at the receiving end. In general signal from antenna goes to BAND PASS FILTER followed by LOW NOISE AMPLIFIER in wireless communication system. The desired signal at the receiver antenna is in the range of microvolts and should be amplified. This amplification should be completed with minimum additional noise using LOW NOISE AMPLIFIER.  In this paper we have designed Wide band and Narrow band LNA and brief comparison is also discussed. We have simulated both Wideband and Narrow band LNA for wireless application. We conclude that Narrow band LNA has less noise and power dissipation compared to Wide band amplifier.