A housing of an antenna device is made of a flexible material and contains the FPC-type antenna therein. The antenna device may be mounted to a PCB assembly of an electronic device, either detachably or fixedly. The housing and the antenna may both be all made of a flexible material, or the housing may further use a base made of a rigid material to mount to the PCB assembly, while the antenna may also be hybrid circuit board. As the antenna device is moved out of the shielding area of a metal housing of the electronic device for use, the flexibility of the antenna device keeps the antenna device from cracking due to external force and increases the durability of the antenna device.