Design of Voltage Control Oscillator for K-band FMCW Radar System
Date Issued
2009
Date
2009
Author(s)
Xiao, Wei-Cheng
Abstract
This thesis presents a 24 GHz microwave voltage control oscillator for K-band Frequency Modulated Continuous Wave (FMCW) Radar System which is realized in 0.18 um CMOS process. At circuit design level, three VCOs have two control voltages for tuning frequency. One is coarse control, which has larger tuning region for revising oscillating frequency. Another is fine control, which has smaller tuning region for frequency modulation of FMCW radar. In chapter 3, A second harmonic VCO including four stage amplifier provides sufficient LO signal for mixer. Secondary, a fundamental VCO including temperature compensated bias circuit reduces the variation of the oscillating frequency with temperature. Finally, a low phase noise VCO by noise matching design is presented. Complementary-conducting-strips (CCS) transmission line, Metal-oxcide-metal capacitors and MOS varactors are used as passive components.
Subjects
Voltage Control Oscillator
FMCW
Type
thesis
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