CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to Chinese Application No. 201810291520.0, filed on Mar. 30, 2018, the entire content of which is incorporated herein by reference.

FIELD OF THE DISCLOSURE

The present disclosure relates to an electronic device.

BACKGROUND

Wearable devices, such as smart watches, are challenging for antenna designs supporting multi-format and multi-band transmissions because the size of the devices is generally small.

Currently, one of the conventional technologies is to add an active component to the antenna design, such that the antenna can support as many frequency bands and formats as possible. However, during a switching process of the active device, only a certain frequency band or format will be guaranteed, and the requirement of multi-band and multi-format working simultaneously will not be satisfied. In another conventional technology, the wearable device utilizes two antenna branches, e.g., a left antenna branch and a right antenna branch, to solve the problem of multi-band and multi-format working simultaneously. However, the design having two antenna branches on the left and right of the device causes the size of the device to be large and reduces the competitiveness of the product.

SUMMARY

In accordance with the disclosure, an electronic device includes a radiator, a first antenna, and a second antenna. The first antenna radiates a radio frequency (RF) signal of a first frequency band by using a first portion of the radiator and the second antenna radiates the RF signal of a second frequency band by using a second portion of the radiator. The second portion includes the first portion.

Also in accordance with the disclosure, a dual-band antenna includes a first antenna and a second antenna. The first antenna radiates a radio frequency (RF) signal of a first frequency band by using a first portion of the radiator and the second antenna radiates the RF signal of a second frequency band by using a second portion of the radiator. The second portion includes the first portion.

Also in accordance with the disclosure, an electronic device includes a radiator and a dual-band antenna arranged at the radiator. The dual-band antenna includes a first antenna and a second antenna. The first antenna radiates a radio frequency (RF) signal of a first frequency band by using a first portion of the radiator and the second antenna radiates the RF signal of a second frequency band by using a second portion of the radiator. The second portion includes the first portion.

