| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an antenna device having structure advantageous for both miniaturization and reduction in height while enabling both excellent communication property and mechanical strength to be achieved. <P>SOLUTION: The antenna device performs information communication by electromagnetic field coupling between a pair of opposing electrodes with a predetermined communication wave. The device includes a coupling electrode 17 which is formed on a dielectric substrate 11 and electromagnetic-field-coupled to an electrode of another antenna device to be communicable with it. The coupling electrode 17 is composed of a length of 1/2 of the communication wavelength, includes a line 12 formed on the dielectric substrate, and a ground 13 which is opposed to a line central part 12a of the line 12 in a surface direction of the dielectric substrate 11 and electrically connected to the line 12, and is electromagnetically coupled with the electrode of the another antenna device disposed on the extension line connecting the line central part 12a and the ground 13. <P>COPYRIGHT: (C)2012,JPO&INPIT |
