| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna device that can increase a communication possible angular range and distance.SOLUTION: An RFID antenna 1 comprises: a booster antenna 3; and a power supply coil 2 formed by winding a coil conductor 21. The booster antenna 3 includes: an opening part 312 larger than the power supply coil 2 viewed from its thickness direction and passing through in the thickness direction; a slit 311 extending from a front end H to the opening part 312; and a slit 313 connected to the opening part 312. About the power supply coil 2, at least part of the coil opening part of the coil conductor 21 overlaps with the opening part 312 viewed from the thickness direction of the booster antenna 3. |
