Radar cross-section study of cylindrical cavity-backed apertures with outer or inner material coating: the case of E-polarization

Analysis of Scattering With Multi-Slotted Cylinder With Thickness: Tm Case

“…The theory of the characteristic modes of a slot/slots in a conducting cylinder and their use for penetration and scattering was given in [5,6]. The slotted cylinder, which is coated with an absorbing material either from inside or from outside, has been analyzed using the dual series based Riemann-Hilbert problem (RHP) technique in [7,8]. Circular cylindrical surfaces covered periodically with the metallic strips and patches are considered in [9] using dual-series technique and in [10] using mixed spectral domain method (SDM), conjugated gradient method (CGM) and fast Fourier transform (FFT).…”

Estimates of Accuracy and Efficiency of a Mom Algorithm in for 2-D Screens

“…Let us prove that it is really so. Integrating by parts in (19), one can obtain the asymptotic behavior of f m as f m = O(m −2 ), and then, using (29):…”

“…To this end, we use the canonical geometry of a circular screen. Such a canonical problem has been solved semianalytically with the aid of the Riemann-Hilbert technique developed in [19,25]. The Riemann-Hilbert technique solution we use in the form outlined in [25] with the aid of the computational code pleasantly given us by one of the authors of this paper.…”

“…6, where we consider the scattering from the right triangle screen of moderate electric size 50 for two incidence angles: i 0 = 0 • (frontal incidence) and i 0 = 45 • (incidence on the rib). Scattering amplitude rms errors calculated by comparing to the RS for some values of the mesh density (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) are exhibited in this figure for two MoM algorithms (with PS and with SE) with the goal of demonstrating the possibility of choosing the appropriate mesh density for these two at the microwave range (graphics (a), (b)). In the same figure, we demonstrate the independence of errors from the electric size of the scatterer (graphics (b)-(d)).…”

“…To verify this issue, we compare the novel method with convergent series solution for scattering from semicircular cylindrical screen [19]. The remainder of the paper will proceed as follows.…”