Concurrent dual-band LNA for automotive application

This paper presents a concurrent CMOS dual-band LNA (DB-LNA) targeting the FCC automotive short and long range radar bands located at 25.5 GHz and 76.5 GHz, respectively. The DB-LNA utilizes a second order dual-band matching network to achieve a 7 GHz bandwidth in the input matching network at 25.5 GHz. Mathematical formulas assist in determining the matching network and output load components values are presented. The DB-LNA is designed using 65nm CMOS technology and occupies an area of 0.166 mm². The DB-LNA achieves a voltage gain of 16 dB and 10 dB and a noise figure of 3.5 dB and 8.2 dB at 25.5 GHz and 76.5 GHz, respectively, with a power consumption of 48 mW from a 1.2 V supply.