Research Of The Electromagnetic Compatibility Of The Shipboard Antenna Based On Fast Multipole Methods

Nowadays,a large surface ships owns many complex radar antenna platform.its physical space and electromagnetic space becomes narrow extremely.electromagnetic environment is complex,communication system frequency range is wide,Which frequency ranging from several thousands Hertz to 40 GHz,makes the great interference of the shipboard antenna in the work of electromagnetic,and influences the properties of the surface warship greatly.So shipboard antenna electromagnetic compatibility analysis has become very important.calculate the electromagnetic compatibility shipboard antennas with a single multilevel fast multipole algorithm often requires a lot of storage space and computing time.Therefore,based on MLFMA,This article solves the problem of electromagnetic compatibility shipboard antenna with MLFMA-PO Hybrid algorithm.Firstly,This article analyzes the basic algorithm of hybrid algorithm,and introduces the basic theory and formula of the method of moments,and it establishes the integral equation of electromagnetic field surface.On this basis,the MLFMA is introduced the basic principle and implementation steps.Then it introduces the basic principle of the method of physical optics and formula,and it introduces the iteration method of physical optics of the basic principle and the basic formula.Solved matrix condition is often bad in the actual process,it often leads to iterative convergence slowly or no convergence.In order to solve the above problems,on the basis of the original hybrid algorithm,this article put forward an improved new algorithm,which algorithm establish spectral domain two step pre-processor combined with The generalized minimum residual method,accelerating the Solution of matrix-vector multiplication.Then the improved MLFMA-PO hybrid algorithm analysis electromagnetic compatibility of shipboard antenna.Secondly,in this paper,electromagnetic compatibility of shipboard antenna is analysis From the aspects of model simulation.The FEKO was applied to large destroyers to electromagnetic modeling and meshing.This article makes the simulation of the antenna near-field electromagnetic field strong features,the antenna pattern and the coupling between the antennas,and makes the Analysis and simulation of the shipboard shortwave antenna in different frequency,antenna height,horizontal and vertical distance under thecondition of the radiation pattern and the coupling strength,analyzes the electromagnetic compatibility of the shipboard antenna.Finally,based on antenna mutual coupling matrix Eighteen value decomposition algorithm,this paper optimizes antenna layout,and verifies this method through a simple electric small size target,makes a reasonable analysis and antenna configuration scheme,the results were compared with the actual situation,show that plan is in conformity with the actual antenna arrangement principle,carrier antenna layout in design of ship installation has great reference value.