Electromagnetic Compute In Electromagnetic Entironment Estimate

Using electroma gnetic computing method and object-oriented programmingtheory ,This paper researches the electroma gnetic environment of subwa y station,mobile communication base station antennas and shortwave antennas which catchpeople's attation more and more. Based on that,visua l electroma gnetic simulationsoftwares have been explored in C++Buider 6 .Supply rail and track rail compose the DC traction power supply system ofsubway.This paper puts forward theirs induced field model, and then solves the modelwith finite differeace approach and programmes simulation software. This softwarefunction contains:â‘ calculating electric field intensity and ma gnetic inductionintensity at very point;â‘¡drawing contour graph of electric field intensity andma gnetic induction intensity in the station of subway.This paper estimates theelectroma gnetic circumsta nce of subwa y station,according to the instruction ofEuropean union (1999/519/EC).In view of the electroma gnetic wave-reflection on the earth and the directivefunction,this paper puts forward two-path model to simulate the electroma gneticradiation of mobile communication base station antenna and programmes simulationsoftware. This software function contains:â‘ calculating power density at every point,lacated in the far field of antenna;â‘¡drawing damply curve of power intensity vsdista nce;â‘¢drawing contour graph of power intensity in every rectangular area.This paper estimates the electroma gnetic circumsta nce of mobile communication basestation antenna,according to the nationa l standard (GB8702-88) and guideline (HJ/T10.3-1996).On the base of electroma gnetic model of horizontal shortwave antenna at thesame phase, conducted in our laboratory, This paper programmes simulation software.The software has two characteristics:â‘ electric parameters of array antennas andfield calculation function have been encapsula ted in dantianxia n class ,this is in favorof lowering the programming difficulty and safty of data.â‘¡The software uses linked lists data structure in order to superpose field intensity of antennas,and ma inta iningthe linked lists through browsing, inserting , deleting and modifying.This paper reasearches the electroma gnetic environment of above electricequipments,in favor of designing ,constructing and environment impact assessment. Ithas practica l significa nce to control and decrease electroma gnetic radiation from thesource.