RF characteristics of the designed sensors at various conformal angles
| RF characteristics | Substrate material at various conformal angles | |||||
|---|---|---|---|---|---|---|
| PVDF-HAP-CS with 17-4PH SS | PVDF-HAP-CS with Cu adhesive tape | |||||
| 0° | 30° | 45° | 0° | 30° | 45° | |
| Dimensions of parts (in mm) | Ground plane: 47.48 × 50.00Substrate: 47.48 × 50.00Patch: 29.38 × 22.05Feed: 20.00 × 1.05 | Ground plane: 47.48 × 50.00Substrate: 47.48 × 50.00Patch: 22.36 × 29.75Feed: 30.00 × 0.70Slot cut: 6.00 × 3.50 | ||||
| SAR value (in W/kg) | 1.077 | 1.238 | ||||
| Gain (in dB) | 0.54 | 1.67 | 4.02 | 1.89 | 2.17 | 3.24 |
| Scattering parameters (fr in GHz, S11 in dB) | 2.39, –10.33 | 2.38, –10.63 | 2.38, –12.99 | 2.43, –18.66 | 2.43, –10.99 | 2.42, –11.32 |
PH: precipitate hardened; PVDF-HAP-CS: polyvinylidene fluoride-hydroxyapatite-chitosan; RF: radio frequency; SS: stainless steel. fr is frequency; S11 is reflection coefficient