| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique which allows for adjustment of the resonance frequency required after manufacturing an IC tag or when sticking an article.SOLUTION: In an IC tag 1 including at least a loop antenna 2, a capacitor 7 constituting a resonance circuit together with the loop antenna 2, and an IC chip 3 for transmitting and receiving radio waves via the resonance circuit, an adjustment method of the IC tag resonance frequency brings a metal film 6 close to cover the loop antenna 2 partially. The size of the metal film is 1/4-1/2 of the loop antenna size. |
