Neural Network Characterization of Reflectarray Antennas

Table 1

Computational time and memory requirement for the evaluation and the storage of the reflection coefficient maps for different types of re-radiating elements, with the periodic full-wave approach and the ANN training.

Element type	Full wave		ANN training
	Computational time	Memory requirement	Computational time	Memory requirement
1-layer square patch	4 h 45 min	0.9 Mb	55 min	9.5 Kb
1-layer modified Malta Cross	65 h	2.5 Mb	4 h	134 Kb
2-layer stacked patches	241 h	3.2 Mb	13 h 30 min	160 Kb
3-layer square patches	1.2×10^4h	67 Mb	341 h 50 min	2.87 Mb