Research On Key Technologies Of Millimeter Wave Frequency Multiplication Chain Based On CMOS Process

With the increasing demand for large data capacity and higher data rates in wireless communication systems,electronic systems in the millimeter-wave frequency band have gained widespread attention and research.The millimeter-wave frequency band offers abundant bandwidth resources,providing a huge opportunity to achieve high data rate communication.CMOS integrated circuit technology,with its advantages of low cost,high integration,and low power consumption,has been widely used in communication,radar,and other consumer electronics fields.However,the high-frequency communication systems present challenges in the design of high-performance millimeter-wave frequency sources.The use of traditional baseband oscillators to obtain high-frequency sources has limitations in terms of phase noise,stability,and other performance parameters.Using low-frequency oscillator cascaded multiplier chain links can effectively solve this problem.Therefore,this thesis mainly discusses the research and design of millimeter-wave multiplier chain links under CMOS process,which is divided into three main parts:(1)Theoretical analysis of frequency multipliers and research on passive millimeter-wave devices.The basic principles of active multipliers based on field-effect transistors are analyzed,and several common active multiplier topologies are introduced.The electrical properties of passive devices,such as transmission lines,inductors,capacitors,and transformers,are briefly introduced,and the focus is on the analysis of broadband passive matching networks based on transformers,which provide matching solutions for subsequent broadband multiplier chains.(2)Research on millimeter-wave broadband injection-locked frequency tripler.A circuit structure that injects a third harmonic signal at the top of the balun differential is proposed to effectively extend the locking range of the injection-locked tripler,which solves the problem of narrow locking bandwidth in traditional injection-locked triplers.The chip test results show that under the input power of 5d Bm,the output frequency is24～33.9 GHz,with a relative bandwidth of 34.2%.The core circuit of the injection-locked tripler has a DC power consumption of 5.07m W,and the chip area is 0.24×0.58 mm~2.(3)Research on millimeter-wave ultra-wideband self-mixing frequency doubler chain.In order to meet the requirements of ultra-wideband output,a fourth-order broadband passive matching network based on transformers is used to expand the operating bandwidth.The self-mixing frequency doubler is used as the core multiplier unit to increase the odd harmonic suppression ratio,and three-stage drive amplifiers are cascaded at the output end to improve the output power and harmonic suppression of the frequency doubler chain.The simulation results show that the frequency doubler chain can stably output a signal at a frequency of 18～36 GHz with a relative bandwidth of 66.7%and a fundamental suppression greater than 37d Bc when the input signal voltage swing is 200m V.The DC power consumption is 25.4mW.