Polarization Stable Triband Thin Square-Shaped Metamaterial Absorber

Table 1

Performance analysis of the proposed absorber.

[Ref]	Configuration of the absorber	Operation center frequency/band (GHz)	Size of the unit cell (in mm)	No. of bands getting absorbed	Percentage of absorption (%)
[2]	Metamaterial resonators	11.5	12 × 4.2 × 0.2	1	>88
[4]	Metamaterial resonators	11.76–14.43	72 × 72 × 3	1	>90
[5]	Hybrid dielectric layer absorber	1.35–3.5	20 × 20 × 1.6	1	>90
[6]	Square loop loaded lumped resistor MMA	0.86–0.96	20 × 19.2 × 1.6	1	>90
[1]	Stretchable metamaterial absorber	11–11.4	8 × 8 × 3	1	>90
[8]	Ultrathin metamaterial absorber	3.25, 9.45, 10.9	11 × 11 × 1.03	3	>90
[11]	Wearable MMA	9, 9.85	30 × 30 × 1	2	>90
[12]	Active MMA	4.3, 5.9	13.8 × 13.8 × 1	2	>90
[13]	Ultrawide-band MMA	0.8–2.7	20 × 20 × 1.6	1	>90
Proposed	MMA	11.4, 17.1, and 19.2	10 × 10 × 0.1	2	>90

MMA = metamaterial-based absorber.