Patent ID: 7508349
Filing Date: 2009-03-24
Classification: H01Q

Abstract:
1. An antenna device built into a casing that is opened and closed via a hinge, the antenna device comprising: a first antenna element disposed in the casing; a second antenna element, disposed in the casing indirectly connected to the first antenna element, comprising a conductor connected to ground; an open/close detector that detects the opening and closing of the casing; and a switch unit, disposed between the first antenna element and the second antenna element, that opens and closes a connection between the first antenna element and the second antenna element by the detection of the opening and closing of the casing by means of the open/close detector, wherein: when the open/close detector detects the opening of the casing, an antenna is configured by means of the first antenna element by the switch unit making the connection between the first antenna element and the second antenna element opened, and when the open/close detector detects the closing of the casing, an antenna is configured by means of the first antenna element and the second antenna element, which is grounded by the switch unit making the connection between the first antenna element and the second antenna element closed.