| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a non-self-ringing type object monitoring tag (radio tag) which is stuck to a commodity case to be used to prevent the commodity from being shoplifted in a CD shop, a home center, a car shop, a household electric appliance store, etc., especially about a non-self-ringing type object monitoring tag that uses the same frequency as that of a tag case for lock to a case of a CD, etc., and an independently used self-ringing type tag. SOLUTION: In this radio tag for theft prevention, a coil is wound around a nanocrystal soft magnetic material (Finemet (R)) and a capacitor is connected to both the ends of the coil to form a tuning circuit. The resonance frequency of the tuning circuit is 22 kHz, and the tag is shared together with a self-ringing type tag device that uses the same frequency as the above-mentioned resonance frequency.</p> |
