A 38–40 dB Power Gain and 2.4 dB NF Three-Stage Cascaded/Cascoded LNA for Long Range Automotive Radar Application

Abstract

This paper demonstrates novel technique to devise a three-stage millimeter-wave low noise amplifier (LNA) operated at 76–77 GHz frequency band used in long range automotive Radar application. LNA having high power gain along with low noise figure is necessary for long range automotive Radar application. High power gain is one of the biggest challenges in the LNA design of the long range automotive application (nearly 40 dB power loss of received echo signal). Here, we propose a novel method to design an LNA using three configurations, i.e., cascaded, cascoded and differential. Design methodology used for this proposed LNA are also discussed in this paper. Power, small-signal, noise and stability analysis of post-layout and RC-extracted novel LNA are carried for the same. The proposed LNA is implemented in 45 nm complementary metal oxide semiconductor process, and its results show 2.4 dB noise factor 38–40 dB maximum power gain. It also provides outstanding stability and minimum size which is best suitable for Automotive integrated Radar sensor.