Design and Analysis of W-Band Transformer-coupled Frequency Tripler and Phase-Locked Loops for Automotive Collision Avoidance and Vital Sign Detection Radar Applications
Date Issued
2015
Date
2015
Author(s)
Huang, Hsiang-Ting
Abstract
In this thesis, we present the design, analysis, and implement for three CMOS millimeter-wave integrated circuits. Including W-Band transformer-coupled frequency tripler, K-band LO generator for automotive collision avoidance and X-band phase-locked loops vital sign detection radar applications. In chapter 2, the W-band injection-locked frequency tripler using bandwidth-enhanced transformer-coupled technique is proposed. Smart cars are the future application trend, which require the internet of vehicles (IOV) and autopilot functions. Through a Marchand balun, the K-band input signal can be converted into differential signals. This frequency tripler is adequate to generate W-band signal with the advantages of wide bandwidth, good phase noise, low dc power and small chip size. In chapter 3, the direct combination of a 8-10 GHz PLL with a 24 GHz frequency tripler for K-band Local Oscillator (LO) generation is proposed. The power consumption can be reduced without inserting a buffer stage between the VCO and the mixer-type tripler. With the shunt-peaking technique at second harmonic, it can improve the phase noise in VCO and results in better phase noise in frequency tripler output. In chapter 4, the proposed X-band fraction-N Phase-Locked Loop with lower phase noise and low dc consumption is proposed and is for vital sign detection radar application. To decrease the phase noise and increase the tuning range, we achieve small K_VCO using band-switching complementary LC VCO. The operation-amplifier type charge pump successfully solves the current mismatch problem. A MASH 111 with 6-bit 3-order delta–sigma modulator is used in this fractional-N frequency synthesizer.
Subjects
injection-locked frequency multiplier
transformer-coupled
phase-locked loops
frequency synthesizer
Type
thesis
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