Design Of CMOS Millimeter-Wave Voltage-Controlled Oscillator

With the rapid development of the wireless communication industry,the requirements for the bandwidth of communication systems for people become higher and higher.In view of the extremely abundant spectrum resources in the high frequency microwave band,modern communication systems are developing towards high-frequency microwaves,especially millimeter-wave bands.Compared with traditional radio short wave,ultrashort wave and microwave communication,millimeter wave communication has a lot of unique features.Due to the millimeter wave band is in the middle of the microwave band and the light wave band(its wavelength is between the wavelength of the microwave and the wavelength of the light wave),it can have some advantages of both microwave and the light wave.At the same time,the millimeter wave is less affected by the clutter during the transmission process,and has strong penetrating ability to particles such as dust,so the communication is relatively stable.CMOS process has a series of advantages such as simple process,high integration,fast speed and low power consumption,so it has always become the first choice for various integrated circuit processes.This thesis is divided into the following sections.The first part expounds the research significance of CMOS millimeter wave voltage controlled oscillator and some research status at home and abroad.The second part introduces the design principle of the millimeter wave voltage controlled oscillator and the analysis of some passive components such as inductors.Finally,a wideband voltage controlled oscillator and a low phase noise voltage controlled oscillator were designed based on the GF 65 nm CMOS process.The main research contents of the thesis are as follows:1?The design of a voltage controlled oscillator with a wide frequency range has been studied.The layout of the variable inductor is implemented in the ADS software,and the coupling coefficient between the inductor coils is controlled by changing the opening or closing state of the switching MOS tube,thereby changing the inductance of the inductor.Then the inductor-generated SP model is placed into the circuit schematic based on Cadence platform design for simulation and analysis;the finally realized voltage-controlled oscillator has an oscillation frequency of 137.87?162.34 GHz,and a power consumption of 15.64 mW,and a phase noise of-86.63 dBc/Hz at a frequency offset of 1 MHz.Compared with the traditional variable capacitance array tuning method,the voltage controlled oscillator of this thesis has a relatively large frequency tuning range.2?The design of quadrature voltage controlled oscillator with low phase noise has been studied.By analyzing the phase noise model of the oscillator,selecting the appropriate circuit structure and components,and using tail current optimization,large capacitance filtering,resonant filtering and other techniques to improve the phase noise performance of the LC voltage controlled oscillator.The finally implemented voltage-controlled oscillator has an oscillation frequency of 139.4?149.3 GHz,an oscillation amplitude of 0.1?2.1 V,a power range of approximately 9.25?9.72 dBm,and a phase noise of-91.83 dBc/Hz at a frequency offset of 1 MHz.Compared with the traditional voltage controlled oscillator,the voltage controlled oscillator has better phase noise performance.