Communication device and antenna assembly thereof

An antenna assembly, applied to a communication device, the communication device comprising a metal rim and a device metal member, the device metal member being disposed in the metal rim, and the antenna assembly comprising:

• an insulating substrate, disposed between the device metal member and the metal rim;
• two electrical coupling portions, disposed at two opposite ends of the insulating substrate and electrically coupled to the device metal member and the metal rim, a sealed slot section is enclosed by the two electrical coupling portions, the device metal member, and the metal rim;
• a feeding part, disposed on the insulating substrate and electrically coupled to the metal rim, so as to divide the sealed slot section into a first slot section and a second slot section whose length is less than that of the first slot section, the feeding part is configured to activate resonance modes of the first slot section in a first frequency band and a second frequency band and activate a resonance mode of the second slot section in a third frequency band;
• and
• a feeding signal source, disposed on the insulating substrate, located between the feeding part and the device metal member, and electrically coupled to the feeding part and the device metal member.