Table 2 Performance comparisons with BPFs based on different SSPPs structures.

From: Miniaturized broadband high out-of-band rejection bandpass filter based on spoof surface plasmon polaritons with defected ground structure

Ref.

Central Frequency (GHz)

FBW of 3dB (%)

Size (λg×λg)

RL (dB)

IL (dB)

Upper-band Rejection

Transmission Zeros

7

6.45

26

1.51×0.47

10

1.8

[email protected]f0-2.3f0

-

8

8.7

32

0.99×0.35

10

3.6

[email protected]f0-1.8f0

2

9

8

36

1.06×0.42

12

1.46

[email protected]f0-2.0f0

0

10

8

48

1.07×0.43

10

0.8

[email protected]f0-1.9f0

6

11

10

40

1.50×0.67

15

3.8

-

1

22

9.25

44

3.15×0.63

12

2.0

[email protected]f0-2.2f0

2

30

3.5

85.7

1.13×0.23

10

1.0

[email protected]f0-8.6f0

-

This work

2.04

43.5

0.68×0.34

12

1.0

[email protected]f0-4.0f0

4

  1. FBW: Fractional Bandwidth; RL: Return Loss; IL: Insertion Loss.