| 摘要 |
<p>A non-directional RFID smart card includes triangular, pentagonal or hexagonal pyramid base (2), a 3D coil consisting of multiple circular planar coils (1) or tubular antenna coils (5) that are respectively installed in each of the multiple faces of the pyramid base (2) and connected in series and/or parallel, and an IC chip (11) embedded in the pyramid base. Thus, the 3D coil of the coils (1;5) can cut the magnetic lines of force created by an RFID reader at about 90º angles in any direction to induce an electric current for waking up the IC chip (11).</p> |
