Ref

Frequency

(GHz)

S11

(dB)

Substrate

Antenna shape

Dimensions

(mm × mm)

Antenna gain (dB)

[6]

2.45

−50.19

FR4 ε_r = 4.4

tangα = 0.02

h = 1.6 mm

Patch

fractal slot

NA

2.408

[7]

2.45

−50

FR4 ε_r = 4.4

tangα = 0.02

h = 3.2 mm

Patch

Fractal slot

38 × 38

2.2

[12]

2.45

−20

FR4 h = 2.5 mm

Patch

35 × 35

0.5

[13]

2.45

−13

FR4 h = 0.8

Patch

41 × 35.5

2.9

This work

2.45

−52

FR4 ε_r = 4.4

tangα = 0.02

h = 1.6 mm

Patch

Rectangular

40 × 47.5

3.48