Pulsed EM-field scattering by narrow metastrips

Abstract

Electromagnetic (EM) scattering by an infinitely long, narrow perfectly electrically conducting (PEC) strip has been approximately analyzed in the real frequency domain (FD) by Schelkunoff using the concept of external (per-unit-length) impedance [1, Section 8.5]. This efficient approach has been later generalized in Ref. [2] with the aid of the time-domain (TD) EM reciprocity theorem (see [3]), thus formulating the scattering problem in the form of an integral equation of the time-convolution type. This line of reasoning is also pursued in this chapter, where an efficient computational methodology capable of achieving the transient electric- and magnetic-current distributions induced along a narrow metastrip is introduced. The combined effect of (magneto-)dielectric and conductive properties of EM-penetrable metastrips is incorporated using the concept of thin-sheet, high-contrast transition conditions as introduced in Chapter 3.