| 摘要 |
<p>A cap 5 with an insulator or gap 7 beneath and a conductive collar 8; each of which connect to an RFID tag to form an antenna. The bottles fluid or a plate can enhance or disrupt the antenna by affecting its capacitance, inductance, impedance or resonance. The electrical connection to the antenna ideally includes weaknesses such as perforations 2 to assist disconnection when the cap is moved. The tag can include additional inputs to detect tampering. The RFID tag and the collar part of the antenna can be integrally formed by printing on a label or strap 1. The collar 8 and lid 5 preferably have matching impedances. The tag is designed to be read by a leaky feeder. There is a mathematical relationship between the authentication code and the user data to enhance security.</p> |
