POWER ANTENNA APPARATUS AND APPLICATION THEREOF TO WIRELESS COMMUNICATION SYSTEM

摘要

Disclosed is a power antenna apparatus (30) for automaticall extrac/retracting an antenna (10). A motor (24) is controlled by a co ntrol circuit to generate a rotational force. An antenna housing (31) has a guide slot (31a) extending longitudinally on an innersurface thereof. A rotary member (20) is installed in the antenna housing (31) and is rotated by the motor (24). A coil spring (32 ) is rotatably accommodated in the antenna housing (31) and one end thereof is fixed to the rotary member (20). An antenna conveying member (35) is received together with the antenna (10) within the coil spring (32) as being fixedly coupled with the antenna (10) by a lower end of the antenna (10). The antenna conveying member (35) has protrusions which are loosely inserted into the guide slot (31a) of the antenna housing (31) and conveys the antenna (10) along with the guide slot (31a) to extract or retract the antenna (10) by means of a rotation of the coil spring (32). Other embodiments are disclosed for flexible installation of the apparatus. Application of the apparatus to a wireless telephone is also disclosed.