표 1. | Table 1. 정확도 비교를 위한 계산 조건 | Calculation condition for comparison of accuracy.

FDTD Variables	grid length (Δx=Δy) [m]		0.0015
	time step (Δt) [ps]		1
	frequency (f) [GHz]		10
ELND-FDTD Variables	Concrete	α	1.19329394108659
		s1	1.00489036223125
		s2	0.99952599495495
	Free-space	α	1.01655624891844
		s1	1.00037336046509
Concrete	relative permittivity		13
	conductivity [S/m]		0.021