80 GHz co-designed LNA and antenna for automotive radar

Abstract

Co-designed Low Noise Amplifier (LNA) and dipole antenna in a RadioFrequency (RF) dedicated silicon technology, BÌCMOS9MW, are presented in this paper. The LNA is a two-stages cascode based on a SiGe:C 130 nm HBT optimized for maximum gain. The antenna is a dipole designed to match the LNA input impedance and maximize radiation diagram. Both are co-integrated directly on the silicon chip. The circuit is dedicated to automotive radar applications at 80GHz. The measurement results of the co-integrated LNA exhibit a gain and NF of 26dB and 5dB respectively with a power consumption of 20mW, while the antenna shows a simulated gain of 0dB.