Mobile device with high radiation efficiency

A mobile device with high radiation efficiency, comprising:

• a ground element;
• a first radiation element, coupled to the ground element;
• a second radiation element, coupled to a feeding point;
• a third radiation element, coupled to the feeding point;
• a fourth radiation element, coupled to the ground element, wherein an antenna structure is formed by the first radiation element, the second radiation element, the third radiation element, and the fourth radiation element;
• a dielectric substrate, wherein the first radiation element, the second radiation element, the third radiation element, and the fourth radiation element are disposed on the dielectric substrate;
• a speaker body, wherein the speaker body has a first vertical projection on the dielectric substrate, and the first vertical projection at least partially overlaps the third radiation element;
• and
• a cable, coupled to the speaker body, wherein the cable has a second vertical projection on the dielectric substrate, and the second vertical projection does not overlap the antenna structure at all.