| 摘要 |
PROBLEM TO BE SOLVED: To provide a tag antenna for UHF bands, which has a small size and a small printing area and has easiness of performing impedance matching. SOLUTION: As shown in (A), a pair of main constituent elements 2R, 2L which is symmetric to a Y-axis is arranged. As shown in (B), auxiliary constituent elements 3R, 3L are provided in contact with an inside of each of the pair of the forging main constituent elements and further auxiliary constituent elements 4R, 4L are provided in contact with an inside of the elements 3R, 3L. Meshes 5 are put in these auxiliary constituent elements to form frame-shaped constituent elements. As shown in (C), a pair of the auxiliary constituent elements 4R, 4L is tied by a loop constituent element 6, while a ground point E is grounded and besides a high-frequency circuit 7 is connected with a feeding point S. For example, when scheming the antenna so as to receive and transmit an electric wave of 953 MHz, the antenna becomes 50.4 mm×16.8 mm in size, which is extremely small and light. COPYRIGHT: (C)2008,JPO&INPIT
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