| 摘要 |
PROBLEM TO BE SOLVED: To provide the low-cost communication module in economical coil structure. SOLUTION: The communication module has an annular coil body formed by forming a flexible circuit board 2 almost rectangularly, providing a slit 5 in parallel to the long sides, forming an antenna coil 1 surrounding the slit 5, and arranging and mounting electronic accessory components on the board 2 where the antenna coil is formed in the extension direction of the slit and then widening board parts on both the sides of the slit almost annularly around the end parts of the slit as vertexes. |
