| High power continuous Microwave Power Transmission technology has been paid more and more attention by academia and industry.Relevant theory and key technologies have become a research hotspot.Receiving antenna plays an important role in energy transmission link.Based on the concept of Space Solar Power Satellite,this thesis explores the design method of receiving antenna in Microwave Power Transmission.Reflector array antenna is very suitable for microwave wireless energy transmission because of its advantages of large aperture,high power and convenient feed.Therefore,reflector array receiving antenna technology is taken as the main direction in this thesis,which has important theoretical significance and engineering application value.The main achievements can be described as follows:1.Design of reflector array receiving antenna distribution based on power matching.Firstly,the power matching conditions for the aperture distribution of the Microwave Power Transmission antenna are given.Based on this formula,the transmission efficiency formula of the receiving array antenna is derived when the array element is a round aperture reflector antenna.Then,a nonlinear optimization model for the transmission efficiency of hexagonal boundary reflector array antenna is established.By designing the aperture field of the receiving antenna array element,the feasibility of the array as the receiving antenna scheme is verified under the classical Gauss illuminate distribution.Finally,aiming at the problem of energy leakage at the splicing of the round aperture reflector antenna,a scheme of cutting the reflector array antenna is proposed and verified.2.Design of a new receiver array antenna based on stepped aperture field.Firstly,the feasibility of the stepped aperture field distribution for the reflector array antenna is verified,and the Non-uniform Fast Fourier Transform algorithm is used to adjust the antenna,and the coincidence degree between the hexagonal boundary reflector array pattern and the target pattern is tested.Then,aiming at the problem of energy leakage at the splice of circular aperture reflector antenna,a new idea of circular parabolic cylindrical array receiving antenna has been proposed,and the antenna design based on electromechanical coupling theory has been preliminatively explored,and the design idea of corresponding high-power rectifier circuit has been proposed.Finally,the feasibility of the new scheme has been verified by the model.3.Structure error compensation method for non-uniform array antenna is proposed.Firstly,the electromechanical coupling model of arbitrary planar array is given.Then,a compensation algorithm for distorted non-uniform array antenna is proposed.The idea of the algorithm is to interpolate the distorted array into virtual uniform array by Taylor expansion and virtual interpolation,and transform the error into virtual array excitation,and then use iterative optimization method based on Fourier transform to get the compensation excitation.Finally,compared with FEKO simulation and classical particle swarm optimization,the proposed compensation method has been proved to be correct and effective. |
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