Antenna device for a mobile phone

An antenna device in a sliding type mobile phone having a body housing, a sliding housing for sliding up or down in a lengthwise direction along the body housing, and a main antenna device in the sliding housing, the antenna device comprising:

• at least one sub-antenna device installed in the lengthwise direction in the sliding housing, for electrically connecting to or separating from the body housing, slidingly approaching or moving away from the body housing along with the sliding housing;
• and
• at least one connection unit for electrically connecting the sub-antenna device to the body housing for signal transmission between the sub-antenna device and the body housing.

An antenna device in a mobile phone having a body housing, a sliding housing for sliding up or down in a lengthwise direction along the body housing, a sliding module for connecting the sliding housing to the body housing to allow the sliding housing to slide up or down, and a main antenna device in the sliding housing, the antenna device comprising:

• at least one sub-antenna device installed in the lengthwise direction facing the sliding module, for electrically connecting to or separating from the body housing;
• and
• at least one connection unit for electrically connecting the sub-antenna device to the body housing for signal transmission between the sub-antenna device and the body housing.