A SiGe Fractional- ${ N}$ Frequency Synthesizer for mm-Wave Wideband FMCW Radar Transceivers
作者： Gregor Hasenaecker , Marcel van Delden , Timo Jaeschke , Nils Pohl , Klaus Aufinger
DOI: 10.1109/TMTT.2016.2520469
关键词: Wideband 、 Frequency modulation 、 Phase frequency detector 、 Phase noise 、 Physics 、 Center frequency 、 Electrical engineering 、 Optics 、 Frequency divider 、 Frequency synthesizer 、 Voltage-controlled oscillator
摘要: A millimeter-wave (mm-wave) frequency synthesizer is presented focusing on an ultra-high-speed fractional- ${ N}$ divider and a highly linear phase-frequency detector (PFD). All circuits are integrated into high-frequency SiGe bipolar technology. The programmable can be operated at input frequencies between dc 57 GHz for division factors in the entire integer range from 12 to 259. PFD optimized synthesis, which requires extremely characteristic due modulation of its frequency. used together with 80-GHz wideband voltage-controlled oscillator (VCO) transceiver high precision mm-wave frequency-modulated continuous-wave (FMCW) radar sensor. As shown by experimental results realized stabilize VCO low phase noise below $-{\hbox{97 dBc/Hz}}$ 10-kHz offset around center 80 generate ramp bandwidth 24 GHz. Furthermore, accuracy demonstrated FMCW distance measurements inside waveguide free space. Inside standard deviation target 0.0018 $^{\circ }$ (which corresponds 9.4 nm) was measured.
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