77-GHz分數型頻率合成器及毫米波防撞雷達系統

Abstract

在本論文中，一個操作在77-GHz完全整合的分數型頻率合成器被實現。以台積65奈米制程制作，本頻率合成器達到在1 MHz偏移頻率下-85.3 dBc/Hz 的相位雜訊，-55 dBc的參考突波，及-40 dBc的分數突波，在1.2伏特的供應電壓下消耗73毫瓦之功率。使用三角積分分數型頻率合成器作為連續波頻率調變產生器，本頻率合成器線性地調變載波頻率達700MHz且方均根誤差小於300kHz。進一步與收發機前端及以快速傅利葉轉換為基礎的基頻處理器整合，在1.2伏特的供應電壓下消耗243毫瓦之功率，本原型最遠可以偵測到106公尺外的中型轎車。

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.