CAJ | 학술논문

为更好地研究海面上方低空突防飞机的雷达散射特性，基于迭代物理光学法（AIPO）和等效电流法（MEC），提出了计算电大尺寸二维导体海面上方低飞目标的AIPO+MEC算法，应用 AIPO计算海面与目标之间的相互作用，用MEC计算棱边绕射。通过计算海面上金属立方体的双站散射系数，与已有数值算法结果相比较，验证了算法的正确性。用PM谱粗糙面模拟实际海面，应用该算法计算了海面上方三种典型隐身飞机模型的后向散射系数，并与自由空间中飞机模型的散射系数和平面上方飞机模型的散射系数进行了比较。结果表明，由于海面散射以及海面与飞机之间的相互作用，后向散射系数增大，且下方为海面时的散射系数角度性分布的散射比下方为平面时更为平缓。这对现代战争中海面上方低空目标探测和雷达设计具有一定的理论指导意义。
위경호지연구해면상방저공돌방비궤적뢰체산사특성，기우질대물리광학법（AIPO）화등효전류법（MEC），제출료계산전대척촌이유도체해면상방저비목표적AIPO+MEC산법，응용 AIPO계산해면여목표지간적상호작용，용MEC계산릉변요사。통과계산해면상금속립방체적쌍참산사계수，여이유수치산법결과상비교，험증료산법적정학성。용PM보조조면모의실제해면，응용해산법계산료해면상방삼충전형은신비궤모형적후향산사계수，병여자유공간중비궤모형적산사계수화평면상방비궤모형적산사계수진행료비교。결과표명，유우해면산사이급해면여비궤지간적상호작용，후향산사계수증대，차하방위해면시적산사계수각도성분포적산사비하방위평면시경위평완。저대현대전쟁중해면상방저공목표탐측화뢰체설계구유일정적이론지도의의。
In order to study the Radar Scattering Characteristics of Low Altitude Aircraft over the Sea, a new method called AIPO+MEC is proposed is this paper. The interaction between object and ocean surface is computed by using the Iteration Physic Optic (AIPO) method, and the Method of Equivalent Currents (MEC) is used to compute the edge diffraction. By comparing the bistatic scattering coefficient of metal cube located on ocean surface which is computed by the method already exists, the validity of this method is proved. The realistic ocean surface is simulated by rough surface with PM(Pierson-Moskowitz)spectrum. The back scattering coefficients of three typical stealth aircraft over ocean surface, which are compared with that of aircraft in free space and that of aircraft over the plane, is calculated by using AIPO+MEC. The result shows that, the back coefficients increase due to the interaction between the aircraft and ocean surface, and the angle distribution of scattering coefficients of aircraft over ocean surface are gentler than that of aircraft over plane. The conclusion of this paper has a certain theoretical guiding significance for detection of low altitude target over the sea surface in modern war.