Efficient hybrid MoM-PO technique with near-field Gordon integral

For the electromagnetic calculation of electrically large conducting object, a new hybrid method of moments-physical optics (MoM-PO) technique is presented to overcome the time-consuming in calculating the coupling term of PO region and MoM region with the increase of the target size by using the conventional hybrid MoM-PO method. The near-field scattering is calculated by Gordon integral to avoid the calculation of the integral equation of the coupling term of the conventional method and to increase the mesh size of PO region, which provides the possibility to reduce the computational time and computer memory. The results of numerical examples indicate the effectiveness of the new method. Compared with the traditional hybrid MoM-PO method, the computational time of the coupling term is reduced. Meanwhile, appropriate accuracy can be achieved.