WIRELESS TAG COMMUNICATION DEVICE AND WIRELESS TAG COMMUNICATION SYSTEM

摘要

Provided is a wireless tag communication device for achieving a practical security system with a simple configuration. The wireless tag communication device is provided with a directivity control section (54) for controlling directivity of communication between the device and a wireless tag (14); and a communication state change detecting section (66) for detecting communication state changes within a prescribed range, based on a response signal transmitted from the wireless tag (14) in each directivity specified by the directivity control section (54). Movement of a mobile body (94) within the prescribed region can be easily detected, by monitoring disturbance in the communication between the device and the wireless tag (14) due to movement of the mobile body (94) as a radio wave blocking object or a radio wave reflecting object, and by monitoring multipath formation and the like.