Table 2: Geometrical parameters calculated by the curve-fitting method.

θlloop (mm) (mm) (mm)D (mm)

8.31.02.010.0
45° TE8.40.91.310.2
45° TM8.61.62.09.8
Averaged values8.41.21.810.0
Optimal values by HFSS parameter sweep8.21.01.010.0