Design and analysis of a low noise amplifier at 5GHz for IoT applications

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Abstract

This paper presents a low-power Low Noise Amplifier (LNA) for the 5-GHz frequency band. The operating voltage of this Low Noise Amplifier is 1 V. Capacitive Coupling is used for gain boosting. By using these techniques forward-body-bias and Current-reuse DC power dissipation is reduced. The simulation result shows the Noise Figure (NF) of 3 dB and 19 dB of gain at 5-GHz with 1 V operating voltage & power dissipation is 0.62 mW. This LNA is implemented using a 180 nm TSMC library. Employing a modified current-reused architecture, the low-noise amplifier (LNA) can operate at a very low supply voltage with microwatt power consumption while maintaining reasonable circuit performance at 5 GHz.

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Keywords

Capacitive Coupling, Forward body bias technique, Forward gain, Low noise amplifier, Noise figure