| 摘要 |
The invention provides a technique that makes it possible to surely detect an abnormality in normal operation of an antenna of a communication system for wireless communication with an RF tag attached to a management target article. The antenna is provided with an operation confirmation RF tag with which the antenna can always establish wireless communications when normally transmitting to the attached RF tag. The communication system transmits, from the antenna, radio waves for wireless communication with the RF tag attached to the management target article, and thus can determine an abnormality of the antenna on the basis of the presence or absence of a response from the operation confirmation RF tag. |
