| 摘要 |
<p>An RFID device for sensing the properties of a material in proximity to a UHF tag. The RFID device includes a microchip and a combined structure operatively coupled to the microchip, comprising an antenna section and a conductor loop that functions as an impedance transforming section. An environmentally sensitive material added to the structure causes a change in an electrical characteristic of the combined structure in response to a signal from an RFID reader, resulting in a complex reflected signal received at the reader representing a sensed state of the material.</p> |
