Title :
SiGe Circuits for Spread Spectrum Automotive Radar
Author :
Trotta, Saverio ; Dehlink, Bernhard ; Knapp, Herbert ; Aufinger, Klaus ; Meister, Thomas F. ; Böck, Josef ; Simbürger, Werner ; Scholtz, Arpad L.
Author_Institution :
Schatzbogen 7, Munich
Abstract :
This paper presents circuits in SiGe bipolar technology for spread spectrum automotive radar applications in the band from 77 to 81 GHz. They cover the transmit and receive paths. The transmitter integrates a voltage controlled oscillator, a prescaler by 64, a 10 bit linear feedback shift register (LFSR), and a biphase modulator. The system has been optimized in order to achieve a range resolution less than 12 cm and an unambiguous range of 124 m. The quadrature receiver frontend consists of a single-ended low-noise amplifier (LNA), balanced-to-unbalanced converters, two fully differential direct-conversion mixers, LO buffer amplifiers, and a branchline coupler for I/Q generation. The presented systems show that millimeter-wave circuits in SiGe technology can achieve high integration levels along with high performance. They are well suited for application in spread spectrum automotive radar systems.
Keywords :
Ge-Si alloys; amplifiers; low noise amplifiers; millimetre wave circuits; mixers (circuits); radar receivers; radio transmitters; road vehicle radar; voltage-controlled oscillators; balanced-to-unbalanced converters; biphase modulator; bipolar technology; buffer amplifiers; differential direct-conversion mixers; linear feedback shift register; millimeter-wave circuits; quadrature receiver; single-ended low-noise amplifier; spread spectrum automotive radar; voltage controlled oscillator; Automotive engineering; Circuits; Germanium silicon alloys; Linear feedback shift registers; Low-noise amplifiers; Radar applications; Silicon germanium; Spread spectrum radar; Transmitters; Voltage-controlled oscillators;
Conference_Titel :
Ultra-Wideband, 2007. ICUWB 2007. IEEE International Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-0521-3
Electronic_ISBN :
978-1-4244-0521-3
DOI :
10.1109/ICUWB.2007.4381001
