Floquet mode

SLL (dB)

Peak gain (dBi)

Directivity (dB)

${\alpha }_1$

−13

−6.1

25.18

${\alpha }_0$

−23

−11.4

23.66

${\alpha }_{-1}$

−13

−6.1

25.81

${\alpha }_{-2}$

−11.5

−9.6

25.42