| 摘要 |
<p>An inductive device or antenna for wireless charging has a coil 22 or 32 having a fixed inductance and a fixed area, and being operable in a frequency range of 100 kHz to 13.56 MHz. The inductance may be around 8µH and the area may be in the range 1089mm2 to 1899mm2. The coil may be generally spiral or rectangular. A wireless rechargeable device 30 or a wireless charger 20 may incorporate the inductive device and may have a tuning component, such as variable capacitor. The device is designed for use in battery powered portable devices such as mobile telephones or tablet computers. The frequency range covers a number of different wireless charging standards including the Qi specification using a frequency of 100-150 kHZ, the A4WP standard using a frequency of around 6.78 MHz and the Near Field Communications or NFC technology using a frequency of around 13.56 MHz.</p> |
