Research On Radio-frequency And Millimeter-wave Integrated High-performance Frequency Synthesizer

With the development of modern wireless systems,wireless radio-frequency(RF)systems that can operate in millimeter-wave(mm-wave)frequency region become more attractive.As a key module in RF systems,mm-wave frequency synthesizers are the bottleneck which limit the system performance.In this dissertation,we will focus on challenges on high frequency,wide bandwidth,and low phase noise in RF and mmwave integrated frequency synthesizers.This dissertation firstly discusses direct mmwave signal generation based on low noise oscillator.Then,we introduce an ultrawideband injection-locking technique and a bandwidth extension technique,by which a mm-wave ultra-wideband low-noise signal is generated.Finally,the applications of high-performance frequency synthesizer are studied based on radar and communication systems.The main research contents of this dissertation are as follows:1.By using scalable layout methodology for multi-oscillator coupling,we couple eight oscillators together,which improves phase noise by 9 dB.Based on this technique and 65-nm CMOS process,we design a 60-GHz oscillator.The measured phase noise is-105.5 dBc/Hz at 1-MHz offset.2.By adopting a transformer-based fourth-order resonator,the locking range of the mm-wave injection-locked oscillator can be increased greatly.Based on 65-nm CMOS process,we designed two 60-GHz injection-locked frequency dividers,which has 62.9% bandwidth with 1.2-mW power consumption.3.By adopting a strongly-coupled transformer to boost the injection current,we increase the injection current greatly for injection-locked frequency multipliers.The locking range is improved accordingly.Based on this technique,we designed two 22.4-to-43.2-GHz ultra-wideband injection-locked frequency multipliers in 65-nm CMOS process.The operating bandwidth reaches 61.8%,which has been improved for 5.2x compared to the state-of-the-art.4.We introduce a multi-mode frequency multiplier which has a switchable multiplication ratio.Thus,with a low-frequency and narrow-bandwidth input signal,it can generate mm-wave ultra-wideband output signal.Based on 65-nm CMOS process,we design two multi-mode multipliers.The first one can operate under x3.5,x4.5,and x5.5 switchable multiplication conditions.With the use of 6.2-to-8.0-GHz(25.3% bandwidth)input signal only,the quadrature output signals have a 21.7-to-41.7-GHz(63.1%)frequency range.Another one can operate under x5 and x7 multiplication condition.The input signal is 4.3-to-5.8 GHz(32.0% bandwidth),and the output signal is 22.4-to-40.6 GHz(57.8% bandwidth).5.We adopt the high-performance frequency synthesizers into radar and communication systems.Based on 180 nm CMOS process,we design a 24-GHz singletransmitter-dual-receiver radar chip.Besides,based on 65-nm CMOS process,we designed a 39-GHz two-channel transmitter chip and a two-channel receiver chip.