| 摘要 |
A loop antenna device comprising a feed circuit or integrated circuit (RFIC 60, fig 1) connected to a first coil L21 and a second coil L22 magnetically coupled to the first coil and a conductor member 12 wherein the conductor member and the second coil constitute a loop. The loop may also include capacitors C3 and inductor L3. Such an arrangement may allow current i to flow through the following circular path: second coil L22, capacitor C3, mounting portion 61A, connector 22, conductor surface 12, connector 21, casing part 91, connector 24, circuit board 61 (which includes a ground connector) and inductor L3. Thus, this path defines an opening that may act as a radiation portion that allows inductive coupling between the antenna and an RFID reader. The connectors 21, 22 and 24 may be spring connectors. The antenna may be an HF or UHF band antenna and employed in Near Field Communication (NFC). |
