Table 2 Parametric results with variation in the ground plane

Full ground¹

\(38\,{\text{mm}} \times 30\,{\text{mm}}\)

7.7

–

− 6.81

–

Partial ground²

\(10\,{\text{mm}} \times 30\,{\text{mm}}\)

3.4, 6.1, 9.2

8.1

− 18.4, − 2.15, − 21.54

4.82

Corner cut³

\(3\,{\text{mm}} \times 1\,{\text{mm}}\)

3.4, 6, 9.2

8.24

− 19.05, − 21.15, − 22.36

4.7

Corner cut⁴

\(3 \,{\text{mm}} \times 2\,{\text{mm}}\)

3.5, 5.8, 9.4

8.41

− 20.50.,24.16, − 22.42

4.91

Corner cut⁵

\(3\,{\text{mm}} \times 3\,{\text{mm}}\)

3.6, 5.7, 9.6

8.45

− 21.4, − 24.42, − 20.14

5.06

Corner cut⁶

\(3\,{\text{mm}} \times 4\,{\text{mm}}\)

3.5, 5.8, 9.8

8.70

− 21.25, − 25.58, − 18.05

5.24