| 摘要 |
<p>Provided is a radio IC device which has a resonance frequency not changed by external factors and can reliably communicate with a reader/writer. The radio IC device includes: a radio IC chip for processing a predetermined radio signal; a feed circuit substrate (10) having a feed circuit connected to the radio IC chip; and an emission electrode (30) arranged on at least one of the main surfaces of the feed circuit substrate (10). The feed circuit substrate (10) is formed by including a magnetic material and has a built-in feed circuit. The emission electrode (30) is arranged on at least one of the main surfaces of the feed circuit substrate (10) so as to be electromagnetically connected to the feed circuit and has at least two open ends (30a, 30b). The radio IC chip is connected to the emission electrode (30) via the feed circuit and communicates with the reader/writer by using the HF band frequency.</p> |
