Research On Static And Adaptive Beamforming Methods Of Conformal Phased Array

Confor ma l arrays have unique deve lopment advanta ges over traditio nal p lanar arrays.It can confor m well to the surface of the carrier,has the advantages of increas ing the range of the beam scanning of the array,improving the aerodynamic perfor mance and stealth capability o f the a ircraft,and increasing the aperture of the array antenna,and has good deve lopment potential.However,due to the particular ity of the confor ma l array,conventio nal bea mfor ming methods are not suitable for conforma l arrays,and other methods must be emplo yed.This paper ma inly stud ies three aspects of beamforming of conforma l phased array,side lobe le vel optimization of confor ma l phased array pattern and adaptive beamforming of confor mal phased array.The ma in research contents of this paper are as follows:1.The s igna l receiving model o f pla nar phased array is stud ied.The pattern synthesis of linear phased array and pla nar phased array is introduced.Then the conforma l phased array receiving model is establis hed and the polar ization phenomeno n of conforma l array pattern is analyzed.Find out the difference between conforma l array and planar array,and give a rotation trans formation method to solve the proble m of inconsiste nt direction of conforma l array elements.2.The beamfor ming of conforma l phased array is studied by us ing Euler rotatio n trans formation method.The three-dimens io nal orientation of cylindr ical conforma l phased array and conical conforma l phased array is obtained by simulatio n,and it is proved that the conforma l array has masking After the effect,the beam scanning of the confor mal phased array is comp leted by changing the phase shift values of the cylindrica l conforma l phased array and the conical conformal phased array.3.The optimizatio n of the s idelobe leve l of the conforma l array pattern by genetic algor ithm is studied.The advantages and basic terms of the genetic algor ithm are introduced.The operation steps of the basic genetic a lgor ithm are give n.Based on this,the ge netic a lgor ithm is given.The optimization method of the side lobe leve l of the confor ma l array pattern is improved by the coding method and the objective functio n in the basic genetic algor ithm.Two different optimization schemes are given.Fina lly,the cylindr ical and conical conforma l phased arrays are simulated and optimized.Compare and ana lyze the optimization results.4.Research on adaptive digita l beamforming techniques for confor mal phased arrays.Firstly,the model of confor ma l phased array matr ix adaptive beamfor ming is given.The direction vector of confor ma l phased array is modified.The linear constrained minimum var iance criter ion is a nalyzed.The index of adaptive perfor mance is given.The adaptive beamfor ming is s imulated.Then the sub-array adaptive beamfor ming model of the confor mal p hased array is give n.The sub-array partitioning method is give n and simulated.The simulatio n results show that the conforma l phase The sub-array adaptive beamfor ming performance of the array is better than the array-le ve l adaptive beamforming performance of the conformal phased array.