| 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 achieving further downsizing and multifunctionality to improve communication characteristics of near field communication more securely.SOLUTION: An antenna device 1 is incorporated into an electronic apparatus 30 and communicates with an external device through an electromagnetic signal. The antenna device 1 includes: a first conductor 3 which is provided in a housing 32 of the electronic apparatus and faces the external device; a loop antenna 11 which is provided at an area near an outer edge part 3a of the first conductor, the loop antenna 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 is provided expanding from a center part of the loop antenna to a facing end part 3a2 facing the loop antenna.</p> |
