Design and Optimization of a Coherent Beamforming Network for an Aperiodic Concentric Ring Array

Table 1

Results of the numeric experiments presented and mean values of the nonuniformity improvement on the antenna system.

Antenna system (array + C-BFN)	SLL (dB)	(dB)	ACRA + C-BFN improvement
			SLL (dB)	(dB)
Uniform	−14.49	15.35	—	—
Opt.	−19.67	18.11	−5.7	2.6
Opt.	−21.27	15.57	−6.8	0.1
Opt.	−22.80	19.27	−8.7	3.9