Table 1.

The error of absorptivity between simulation and experimental results.

Frequency/GHz	S11/dB		Absorptivity
	Simulation	Experiment	Simulation	Experiment	Error
3.82	−10.5	−15.7	0.911	0.973	6.8%
11.78	−14.9	−31.1	0.968	0.999	3.2%
19.21	−31.3	−23.8	0.999	0.996	0.2%