The Efficient Method for Calculating the Physical Optics Scattered Fields from the Concave Surfaces

Table 3

Consumed CPU time (second unit) of calculating the PO scattered fields by using the BF method, the NSDP method, and the HFA method.

Frequency k	BF-CPU	NSDP-CPU	HFA-CPU
20	4.4220	3.4565	0.0060
50	10.7037	3.2457	0.0038
100	22.4932	4.1214	0.0236
300	89.2235	3.7641	0.0044
400	91.2143	4.2107	0.0051