Title :
A CMOS 77 GHz radar receiver front-end
Author :
Hoang Viet Le ; Hoa Thai Duong ; Anh Trong Huynh ; Evans, Robin J. ; Skafidas, E.
Author_Institution :
Nat. ICT Australia, Melbourne, VIC, Australia
Abstract :
A receiver (Rx) front-end for automotive radar application operating at 76-77 GHz is presented. The Rx frontend employs double conversion architecture, which consists of a 5-stage low noise amplifier (LNA), a subharmonic mixer (SHM), and a double-balanced passive mixer (PSM). In the layout of the LNA, the output of each stage is placed adjoining to the input of the follow stage creating a LC resonance load. Hence complex interstage matching networks is avoided. SHM driven by 38 GHz LO is adopted to avoid push/pull effect and power hunger of VCO. PSM is utilized for second conversion since it consumes no DC current and has low flickering noise. With the proposed architecture, complex PLL design for radar system can be relaxed. The proposed Rx front-end is implemented in a 65 nm CMOS technology and the measurement results show 16 dB voltage gain, and 13 dB calculated noise figure (NF) while dissipating 23.5 mA from a 1.2 V supply.
Keywords :
CMOS analogue integrated circuits; field effect MIMIC; flicker noise; low noise amplifiers; millimetre wave radar; mixers (circuits); phase locked loops; radar receivers; road vehicle radar; voltage-controlled oscillators; 5-stage low noise amplifier; CMOS radar receiver front-end; CMOS technology; LC resonance load; LNA; PSM; Rx front-end; SHM; VCO; automotive radar; complex PLL design; complex interstage matching networks; current 23.5 mA; double conversion architecture; double-balanced passive mixer; flickering noise; frequency 38 GHz; frequency 76 GHz to 77 GHz; gain 16 dB; noise figure 13 dB; size 65 nm; subharmonic mixer; voltage 1.2 V; CMOS integrated circuits; Mixers; Noise; Noise measurement; Radar; Transceivers; Transistors;
Conference_Titel :
Microwave Integrated Circuits Conference (EuMIC), 2013 European
Conference_Location :
Nuremberg
