| Title |
RCS Estimation of Objects with Impedance Boundary Condition Using PO and ITD |
| Authors |
김준선(Jun-Seon Kim) ; 이현수(Hyun-Soo Lee) ; 이재호(Jae-Ho Lee) ; 서동욱(Dong-Wook Seo) |
| DOI |
https://doi.org/10.5370/KIEE.2024.73.7.1204 |
| Keywords |
Fringe Field; Impedance Boundary Condition (IBC); Incremental Theory of Diffraction (ITD); Physical Optics (PO); Surface Impedance |
| Abstract |
This paper presents an impedance boundary conditioned physical optics (IBC PO) formula suitable for calculating θ- and ?-polarized scattered field from a scatterer with an impedance surface. In addition, while in previous studies, a formula using some of the diffraction coefficients was conceptually used to determine the PO edge contribution required to obtain the fringe field, in this paper, the scattering coefficient of the PO edge contribution was obtained by deriving a formula from the definition of the PO edge contribution. The IBC PO was applied to a coated rectangular metal plate and verified by comparing it with the results of the method of moments and VIRAF tool. The proposed PO edge contribution formula was verified by applying it to a two-dimensional impedance wedge. To verify the total scattered wave, which is the sum of the IBC PO and the fringe field, the proposed formula and VIRAF tool were applied to a cylindrical scatterer composed of a combination of curved wedges. |