| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a communication device with improved IC tag reading precision for an IC tag by improving sensitiveness of an antenna and eliminating variation of sensitiveness. <P>SOLUTION: An IC tag reader/writer 1 reading/writing information from/to the IC tag 7 without any contact consists of a transmission/receipt circuit part 2 and an antenna part 3 constructed of a flat cable and attached in a closed loop by connecting its both end parts 3a and 3b to the transmission/receipt circuit part 2. In the reader/writer 1, at least two loop parts forming a closed loop in a plane view (for example, first and second loop parts 31 and 32) are formed by crossing the antenna parts 3 at least once. When the loop parts are folded back, concentric arrangement, in which a loop part positioned further from both end parts is positioned on the inner side of the circumference, is formed in the structure. <P>COPYRIGHT: (C)2007,JPO&INPIT |
