Table 1 The relationship between radiation efficiency and upper slot width

0.8 mm

1.23

0.1034

0.9893

1.52 mm

1.28

0.1236

0.9847

2.22 mm

1.36

0.1525

0.9768

2.94 mm

1.32

0.1381

0.9809

3.64 mm

1.23

0.1034

0.9893

4.36 mm

1.37

0.1562

0.9756

5.06 mm

1.39

0.1639

0.9731

5.78 mm

1.53

0.2099

0.9560

6.5 mm

1.71

0.2623

0.9311

7.2 mm

(fully open)

1.86

0.3019

0.9088