Ref.

Dielectric constant (ε_r)

Height (mm)

Size of filter

Center frequency

f0 (GHz)

Passband (GHz)

Ref. [20]

10.8

0.635

23.98 mm × 4.96 mm

6.85

3.1 - 10.6

Ref. [21]

3.38

0.508

20 mm × 15 mm

7.1

3.6 - 10.6

Ref. [22]

2.65

1

30 mm × 16 mm

6.85

2.8 - 11.0

Ref. [23]

2.55

0.8

22.51 mm × 13.66 mm

6.85

3.1 - 10.6

Our work

1st filter

6.15

1.52

14.0 mm × 10.1 mm

7.45

3.5 - 11.4

2nd filter

6.15

1.52

14.0 mm × 10.1 mm

7.35

3.1 - 11.6

modified

6.15

1.52

14.0 mm × 10.1 mm

7.35

3.1 - 11.6