Fig. 1.
Signal flow diagram of cavity model.
Fig. 2.
Schematic diagram of rectangular cavity model structure (unit: mm).
Fig. 3.
Coating schematic diagram in rectangular shielding cavities with openings.
Fig. 4.
Equivalent circuit of cavity inner wall.
Fig. 5.
Signal-flow graph of cavity coated with absorbing material.
Fig. 6.
Flowchart of BLT equation modeling.
Table 1.
Electromagnetic parameters in absorbing materials.
| Material | Relative permittivity ɛr | Relative permeability μr |
|---|---|---|
| Graphene | 4.5 | 1.01 |
| SiC | 4.1 | 0.64 |
| PTFE | 2.01 | 0.95 |
| Ni/rGO | 13.45 | 1.14 |
Fig. 7.
SE comparison in various materials.
Fig. 8.
BLT equations and CST error curves for four materials.
Table 3.
Comparison of average CPU utilization rate and computational time.
| Computational method | Average CPU utilization rate [%] | Mean calculation time [min] |
|---|---|---|
| The proposed model | 2 | 0.1 |
| CST software | 73 | 43 |
Fig. 9.
SE in different absorbing materials.
Fig. 10.
Effect of coated thickness in various materials.
Fig. 11.
Comparison of SE with different thicknesses.