PO–PO method for electromagnetic backscattering from a 2D arbitrary dielectric‐coated conducting target located above a 1D randomly rough surface: horizontal polarisation

Abstract

This study proposes and validates a new physical optics-physical optics (PO-PO) method based on the reciprocity theorem to calculate the electromagnetic backscattering from a two-dimensional (2D) dielectric-coated conducting target located above a 1D dielectric randomly rough surface. To avoid the artificial reflection from two endpoints of rough surface, the tapered plane wave proposed by Thorsos in 1988 is introduced as the incident wave. The results obtained from the author's method, for horizontal polarisation, show a good agreement with the numerical results derived from the conventional method of moments in a special case of a perfectly electric conducting target located above a dielectric rough surface. Finally, the influence of some parameters related to the coating material on the composite scattering is investigated and discussed in detail.

Study of the Terahertz Wave Scattering From Metal Surface Coated by Rough Lossy Coating Based on a Ray Tracing Modeling

“…They can be solved from E a (r) and H a (r) in (3) and (4) by (the lower surface of S 1 ) for TM and TE waves, respectively. e TE andê TM can be obtained by (6)…”

“…The scattering characteristics of the coated objects are significantly different from those of the uncoated objects. Presently, most of the studies concerning the EM scattering characteristics of coated objects mainly concentrate on microwave frequencies [6]- [8]. Hence, the surfaces of the object and coating mentioned in [6]- [8] are often supposed to be smooth.…”

“…Presently, most of the studies concerning the EM scattering characteristics of coated objects mainly concentrate on microwave frequencies [6]- [8]. Hence, the surfaces of the object and coating mentioned in [6]- [8] are often supposed to be smooth. In reality, both the metal and coating surfaces should be considered as rough surfaces at the terahertz frequencies and the scattering from the rough case is more complex than that from the smooth case in the terahertz frequencies.…”

Modified PO–PO hybrid method for scattering of 2D ship model on the rough sea surface

“…Another recently introduced hybrid method in the field of rough surface problems is the hybrid PO-PO method which was firstly utilised to compute the EM scattering from a two-dimensional (2D) PEC object above a one-dimensional (1D) perfect electric conductor (PEC) with the random rough surface in [10]. Then, different composite rough surface problems were solved by this method in [11][12][13]. In this paper, first, we show that for a simple smooth object that has no internal interaction, if the distance between the object and the rough surface vanishes until it completely touches the surface, the conventional PO-PO method can be used without any limitation.…”

Scattering and Doppler Spectral Analysis for a Fast-Moving Target above Time-Varying Lossy Dielectric Sea Surface

“…In our previous works, the hybrid PO-PO method [12][13][14][15] was proposed to simulate the composite scattering of a perfectly conducting (PEC) cylinder above the random rough surface. The PO-PO method uses an iterative process, in which both the scattering of a target and the underlying rough surface are calculated by the PO method, and the interactions between them are solved by the Huygens equivalence principle and multipath scattering strategy.…”