Research On Interferometric Direction Finding In Radome Test

With the development of the high performance of the radome,the radome testing,as a supplement and verification of the design of the radome,is also becoming more and more fast and accurate.This thesis,based on the interferometric direction finding technology,the research work of the spherical wave interferometric direction finding theory is carried out in view of the actual problems in the radome testing.In this study,the interference direction finding method suitable for the radome test is obtained through the rigorous mathematical formula deduction.In order to fully demonstrate this method,a quantitative analysis of multiple parameter variables and a variety of baseline forms in the formula is carried out,and the test verification is also carried out.Finally,in the form of software,we integrate the formula calculation,interference resolution,and error solving in the form of software,so as to achieve the user's quick operation on data.The main work and several points of innovation are as following:(1)Spherical wave interferometer theory researchBased on the theory of plane wave interference direction finding,the basic formula of spherical wave interference direction finding is derived,and the specific implementation steps of spherical wave interferometry direction are explained in detail according to the use conditions.In addition,the simulation is carried out by the approximate method and the full wave analysis software to verify the correctness of the theoretical method.(2)Practical analysis of spherical wave interference and direction finding theorySome factors that influence the implementation of the theory of spherical wave interferometry direction finding are analyzed,especially for the measurable and influential center of rotation.The formula is deduced again,while other problems are also improved.Through actual testing,the theory of spherical wave interference direction finding is verified,which ensures that the theory can be applied to the actual test of the electrical performance of the radome.(3)The development of calculation software errorsThe C++ language has developed a spherical wave interference direction error calculation software,the software can window interface for users to input the related parameters,the window contains plot will display the calculation results,the underlying software completes the data file read,direction angle calculation,ambiguity processing,data processing and display the drawing area of four major tasks.The application of the software is convenient and the calculation is fast,which can fully meet the needs of the users,and further improve the practical application of the spherical wave interference direction finding theory.