| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To suppress a drop in an antenna gain even when the external conductor of a coaxial cable comes into contact with metal due to the wiring layout of the coaxial cable for supplying a signal from a reader/writer, as regards an antenna apparatus for RFID (Radio Frequency IDentification), and an RFID tag issuing device. <P>SOLUTION: In the antenna apparatus 7 for the RFID, an antenna element 15 to be a radiation conductor is formed in one area of a rectangular substrate 14, a ground part 17 to be a ground conductor is formed in another area, a power supply part 16 is provided to the edge part of the substrate 14 in a longitudinal direction, and a slit 18 is formed at a position of 1/2 of a longitudinal direction dimension L of the ground part 17 in a direction orthogonal to the longitudinal direction. According to such a configuration, a current for canceling a leakage current produced in the external conductor 19c of the coaxial cable 19 connected to the ground part 17 is generated by the slit 18 provided to the ground part 17, and the leakage current is suppressed. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
