⚡ 本页包含 AI 生成的分析内容，仅供参考
本文提出了一种23GHz的低相位噪声数字Bang-Bang锁相环，用于快速三角波和锯齿波啁啾调制。解决了雷达系统中生成低相位噪声、低杂散和高线性度啁啾信号的问题。
with high resolution require the generation of low-phase-noise, low-spurs, and highly linear chirp signals with large peak-to-peak value (chirp bandwidth) and a short period of the modulation signal [1]. In radar systems, the spot phase noise of the chirp generator is converted to the intermediate frequency of the receiver making it difficult to detect two close targets, while spurs cause the detection of false targets. For those reasons, medium-range radar applications in the 77-to-81GHz band typically specify spot phase noise lower than -90dBc/Hz at 1MHz offset and spur level below -50dBc. Unlike triangular chirps, saw-tooth chirps allow for a reduced dead time for range detection. However, any practical modulator needs a finite time (idle time) to make a large frequency jump at the end of the sawtooth, and this limits
Dmytro Cherniak1,2, Luigi Grimaldi2, Luca Bertulessi2, Carlo Samori2,
Roberto Nonis1, Salvatore Levantino2 Infineon Technologies, Villach, Austria, 2Politecnico di Milano, Milan, Italy 1 Frequency-modulated continuous-wave (FMCW) radars