Table 3: Comparing the optimal result of = 201 and = 7 with [21, 22]. Function model algorithm using MGA (FMAMGA), element number (), ring radii (), and element number in the rings ().

methodPSLL (dB)1234567

HGA [21]-22.942011.01.592.142.883.664.98-
121926364562-

Opt by MGA [22]-25.452010.801.381.882.433.183.914.98
10172227334051

MGAFMA-26.212010.721.221.722.393.183.934.98
9152128354151