Study on transient scattered field from a cylindrically curved conducting open sheet with two straight edges excited by UWB pulse wave

摘要

By extending a frequency domain (FD) uniform asymptotic solution (FD-UAS), we develop a time-domain (TD) asymptotic-numerical solution (TD-ANS) for a transient scattered field when a modulated ultra-wideband (UWB) pulse wave is incident on the convex portion of a cylindrically curved conducting open sheet with two straight edges. The TD-ANS is represented by a combination of the transient scattered field elements which consist of a whispering gallery mode radiation (WG), a surface diffracted ray (SD), a creeping wave incidence and edge diffracted ray (CWED), a reflected geometric optical ray (RGO), and a reflected and edge diffracted ray (RED). The validity and computation rate of the TD-ANS are confirmed by comparing with the reference solution. We show that the TD-ANS proposed here is effective understanding the scattering phenomena.