A 77-GHz Fractional-N Frequency Synthesizer and Millimeter Wave Anti-collision Radar System

• Main Authors: Yi-An Li, 李翼安
• Other Authors: Jri Lee
• Format: Others
• Language: en_US
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/73704697465833703909

碩士 === 國立臺灣大學 === 電子工程學研究所 === 98 === In this thesis, a fully-integrated fractional-N synthesizer for automotive applications operating at 77 GHz has been realized. Fabricated in 65-nm CMOS technology, the synthesizer achieve the phase noise of -85.3 dBc/Hz at 1-MHz offset, the reference spurs of -55 dBc and the fractional spurs -40 dBc, consuming 73mW from 1.2-V supply. Utilizing a sigma-delta fractional-N synthesizer as the FMCW generator, the synthesizer linearly modulates the carrier frequency across a range of 700 MHz, with the RMS error less than 300 kHz. Further integration has been made with the transceiver front-end as well as an FFT-based baseband processor; this prototype provides a maximum detectable distance of 106 meters for a mid-size car while consuming 243 mW from a 1.2-V supply.