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Research On Microwave Photonic Phase-shifting Technology With Frequency-multiplying Based On Integrated Intensity Modulator

Posted on:2021-02-22Degree:MasterType:Thesis
Country:ChinaCandidate:B S ZhaoFull Text:PDF
GTID:2428330611467441Subject:Electronic and communication engineering
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Microwave photonics has been widely applied in broadband wireless access,phased array radar,satellite communications and other fields after nearly three decades of development,providing strong support for the development of today's information society.Microwave photonic phase shifter(MWPPS),as a key component of microwave photonic signal processing,has broken through the bottleneck of traditional electric field technology,and has obvious advantages such as large operating bandwidth,strong anti-electromagnetic capability and flexible phase tuning.It has become the core of beamforming technology in phased array antenna system.However,with the increasing demand of the system bandwidth and phase tunability for modern multifunctional radar applications,the microwave photonic phase shifter is required to satisfy many functions such as phase-shifting and multiple-frequency.Therefore,this paper focuses on the microwave photonic phase-shifting technology with multiple-frequency function.The main research contents are as follows:(1)Firstly,the research background and content of microwave photonics and the implementation principle of phased array technology are summarized to further introduce the study of microwave photonic phase shifter,a key component in the optically controlled phased array technology.The research progress of photonic millimeter wave technology and microwave photonnic phase shift technology and microwave photonnic phase shift technology with multiple-frequency are analyzed.Several current sideband modulation methods based on external modulator are summarized,and the corresponding parameter settings are given to provide theoretical basis for the subsequent microwave photonic phase-shifting technology with multiple-frequency based on integrated intensity modulator.(2)In this paper,a scheme microwave photonic phase-shifting with multiple-frequency based on integrated DP-DPMZM is proposed.Without optical filters,the scheme can generate microwave signal with frequency multiplication factor tunable from two to six continuously and phase-shifting among 360°full range,by controlling the radio frequency signal amplitude and phase and the dc bias voltageof the modulators.Through theoretical analysis and simulation verification,the phase-shifting function of the output signal can be realized by controlling only one parameter of the dc bias of PM,and there is a linear relationship between them.The phase tuning is simple and accurate,while the signal amplitude fluctuation is small,and the system performance is stable.Compared with other microwave photonic phase-shifting with frequency multiplication scheme using optical filter,this scheme with good frequency tunability and multiple wavelength operation introduce phase shift by means of polarization modulation sideband separation,avoiding the system bandwidth limit wih filter.With higher system stability,the phase shifer proposed in the scheme has a good application prospect in the future millimeter wave radar communication system.(3)A frequency-quadrupled microwacve photonic mixer with multi-channel independent phase-shifting is applicated in the beamforming network based on the integrated DP-DPMZM structure.The function of frequency up-conversation and down-conversation can be realized while frequency-quadruple millimeter is generated,which further expands the frequency adjustable range of the system.By controlling the bias voltage of polarization-sensitive OPS in each channel,the 360° linear control of the phase of the output millimeter wave can be realized,and the phase tuning precision is high and operation is simple.
Keywords/Search Tags:Phased-array antenna, Microwave photonic phase shifter, Multiple-frequency, Mixing-frequency, DP-DPMZM
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