Efficient Computation of Scattering from Targets with Negative Impedance Surface

Current surface integral equations used for computing scattering from targets with negative impedance boundary condition (IBC) are not efficient. A modified surface dual integral equation (M-SDIE) for targets with negative IBC is presented. A pure imaginary number is used to balance the formulations. It is proved that the M-SDIE is accurate and efficient with three numerical examples. The first numerical example shows that the M-SDIE is accurate compared with Mie. The second example shows that the presented SIE is efficient. In the third example, a missile head is selected to present the computing power of the M-SDIE. All the examples show that the M-SDIE is an efficient algorithm for negative IBC.