Fig.1.
Coaxial probe for shielding effectiveness measurement: a - electric field and magnetic field in coaxial transmission line, b – material sample alignment
Fig.2.
Schematic of measurement setup
Fig.3.
Picture of measurement setup with sample holder and microwave absorbers (antenna distance D not to scale)
Table 1.
Shielding effectiveness of samples measured for an electric field parallel to the conducting fibres, j =0°
| Sample | Shielding effectiveness at 8.5 GHz [dB] | Shielding effectiveness at 12 GHz [dB] |
|---|---|---|
| 1. Steel + CNT +Graphene | 23 | 16 |
| 2. Steel + CNT + Ag | 24 | 17.5 |
| 3. Steel + CNT | 25 | 17 |
| 4. Steel | 27 | 19 |
Fig.4.
Shielding effectiveness for different rotation angles