Table 2 Performance comparison of the cavity-backed antenna arrays.

From: An All-Metal Broadband Low SLL slot array antenna for use in 5G Sub-6 GHz networks

Ref

Technology

Size of Array

f0 

Bandwidth

Gain

SLL

Efficiency

(GHz)

(%)

(dBi)

(dB)

 (%)

14

PCB

1×3

13.2

3.4

11.6

−19

85

20

PCB

6×16

10

7.15

21.92

−29.1

NA

23

HW

4×4

10

10

20.3

−12

NA

24

HW

2×2

4

15

13.4

−13

98

25

HW

5×4

3.43

0.5

18.2

−20

94

27

HW

2×2

3.71

6.2

11

−14

97

28

HW

1×10

4.92

1.8

13.1

−24.1

82

29

HW

5×6

10

1

18.4

−13

90

This Work

HW

4×4

3.55

25.3

20.2

−19

80–94

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