A Hybrid Method Based on the Iterative Fourier Transform and the Differential Evolution for Pattern Synthesis of Sparse Linear Arrays

Table 1

Comparative synthesizing results by using the IFT-DE and some published tools.

The structure of the SLA	Filling factor of the TLA originally obtained by the IFT (%)	PSLL (dB)		3 dB beamwidth (degree)
		IFT-DE	IFT [8]	IFT-DE	IFT [8]
Symmetrical	77 (N = 200), symmetrical	−24.04	−22.92	0.58	0.588
	66 (N = 200), symmetrical	−24.59	−22.86	0.68	0.685
Asymmetrical	69.5 (N = 200), asymmetrical	−25.46	−24.3	0.64	0.643
	39 (N = 200), asymmetrical	−20.38	−17.33	0.8	0.546
Symmetrical	76 (N = 100), symmetrical	−23.56	−20.53 (by GA in [3])		—
	78 (N = 100), symmetrical	−22.97	−20.56 (by GA in [3])		—
	80 (N = 100), symmetrical	−22.2	−20.52 (by ACO in [5])		—