Backward Surface Wave Propagation and Radiation along a One-Dimensional Folded Cylindrical Helix Array

Table 2

Comparison between our antenna and other small antenna arrays in the literatures.

Reference	Number of elements	Spacing	Height	Gain	F/B	BW
Our antenna	4	0.138	0.06	10.3 dBi	12.8 dB	0.75%
[14]	3	0.11	0.275	7.14 dBi	8.6 dB	2.28%
[15]	3	0.06	0.092	8.5 dBi	7 dB	2.7%
[16]	3	0.09	0.1	8.43 dBi	6.63 dB	1.2%
[17]	3	0.053	0.21	9.9 dBi	n/a	12.44%