Table 2 Performance summary for a MR-WTENG with the coil diameter of 10 cm. Inductance of both the coils is 62.5 μH, C2 = 140 pF.
Distance (cm) | 2 | 5 | 10 | 15 | 20 |
|---|---|---|---|---|---|
Coupling coefficient k | 0.3 | 0.12 | 0.032 | 9 × 10−3 | 2.5 × 10−3 |
Load RL (Ω) | 385 | 150 | 34 | 11 | 11 |
Harvested energy by TENG (µJ) | 38.9 | 38.9 | 38.9 | 38.9 | 38.9 |
Energy at transmitter (µJ) | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 |
Energy at receiver (µJ) | 9.9 | 8.176 | 3.44 | 0.448 | 4.8 × 10−2 |
Transmission efficiency by coupled circuit (%) | 88.4 | 73 | 30.68 | 4.02 | 0.43 |
Transmission efficiency between TENG and load (%) | 28.8 | 21 | 8.8 | 1.15 | 0.12 |
