| 摘要 |
The invention relates to an antenna construction for an RFID chip (2) for long ranges, which comprises a substrate (3), an antenna (1) of conducting material (1) supported by the substrate (3), the antenna (1) is formed as a magnetic dipole, and coupling means (4a, 4b) for coupling the antenna (1) to a circuit (2), which coupling means (4a, 4b) are formed by overlapping extensions (A3, A2, A1, A4) of the antenna conductor (1). In accordance with the invention the antenna (1) is formed of at least three sections (A1, A2, A3) each of different width W1, W2 and W3, where the sections (A1 and A3) are widest and the section (A2) is the narrowest W2 with an optimized shape. |
