P-FFT Accelerated EFIE with a Novel Diagonal Perturbed ILUT Preconditioner for Electromagnetic Scattering by Conducting Objects in Half Space

Table 1

Condest, condition number, and iteration number of different preconditioned linear systems equation (12).

	EFIE-NO	EFIE-ILUTP5	EFIE-ILUT	EFIE-DP-ILUT
Condest	—	2	109,938	4,105
Condition number	4,914	4,885	121	36
Iterative number	229	224	53	31