Table 1 Comparison of the proposed metamaterial absorber using PIN diode with other researches. [unit: GHz].

From: Electronically Switchable Broadband Metamaterial Absorber

Reference paper

ON state

OFF state

Absorbing BW

BW

Physical Size1 (mm2)

Electrical Size2) (λ2)

Absorbing BW

BW

Physical Size (mm2)

Electrical Size (λ2)

23

12–12.8

0.8 (6.4%)

14 × 14

0.58 × 0.58

7.1–8.1

1 (13.2%)

14 × 14

0.58 × 0.58

24

4.75–4.85

0.1 (2%)

9 × 8.4

0.14 × 0.13

4.05–4.15

0.1 (2.4%)

9 × 8.4

0.14 × 0.13

15

2.85–3.15

0.3 (10%)

26 × 26

0.26 × 0.26

3.8–4.2

0.4 (10%)

26 × 26

0.26 × 0.26

25

2.45–2.55

0.1 (4%)

10.5 × 17.4

0.08 × 0.14

2.95–3.05

0.1 (3.3%)

10.5 × 17.4

0.08 × 0.14

Proposed work

8.4–9.3

0.9 (10.2%)

16 × 16

0.47 × 0.47

9.2–10.5

1.3 (13.2%)

16 × 16

0.52 × 0.52

  1. 1)Physical Size of the unit cell.
  2. 2)Electri cal Size is calcualted at the center frequency of the absorbing bandwidth.
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