Simple and Efficient Preconditioner for Surface Integral Solution of Scattering from Multilayer Dielectric Bodies

Table 1

Comparison of numerical performances of NFP, DSP, and No PC for the multilayer sphere.

	CPU time for PC (s)	Memory for PC (MB)	Iteration number	Iteration time (s)	Total time (s)
No PC	—	—	513	1,060	1,060
NFP	445	3,693	15	47	492
DSP	34	673	45	105	139