| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an antenna device which utilizes magnetic shield effect caused by a main metal plate of an electronic apparatus to improve communication characteristics of near field communication regardless of a mounting position of an antenna module.SOLUTION: An antenna device 1 is incorporated into an electronic apparatus 30 and communicates with an external device 120 through an electromagnetic signal. The antenna device 1 includes: a first conductor 3 which is provided in a housing of the electronic apparatus and faces the external device; a loop antenna 11 which is provided at the inner side of an outer edge part 3a of the first conductor so as to be spaced a predetermined distance away from the outer edge part 3a of the first conductor, the loop antenna 11 around which an antenna coil inductively coupled to the external device is wound; and a magnetic sheet 20 which is formed by a magnetic material and provided extending at least from a center part of the loop antenna to any point of the outer edge part of the first conductor.</p> |
