BACKGROUND OF THE DISCLOSURE

1. Field of the Disclosure

The disclosure relates to an electronic device, and in particular, to an antenna device.

2. Description of Related Art

An antenna device is an indispensable part in wireless communication technologies. In a wireless communications apparatus by using a liquid crystal antenna, a liquid crystal material is filled between two layers of conductive elements. However, the liquid crystal material expands when hot and shrinks when cold. The more the liquid crystal material is filled, the greater the thermal expansion and cold shrink, and the greater the degree to which antenna performance is affected by temperature.

SUMMARY OF THE DISCLOSURE

According to embodiments of the disclosure, an antenna device is provided, including a first substrate, a first conductive element, a second substrate, a second conductive element, and an insulating layer. The first conductive element is disposed on the first substrate to define, on the first substrate, a recessed region adjacent to the first conductive element. The second substrate faces the first substrate. The second conductive element is disposed on the second substrate and located between the first substrate and the second substrate. The insulating layer is disposed between the first substrate and the second substrate. In a top view of the antenna device, the second conductive element overlaps the first conductive element and the recessed region, and the insulating layer at least partially overlaps the recessed region.

To make the features and advantages of the disclosure clear and easy to understand, the following gives a detailed description of embodiments with reference to accompanying drawings.

