Mobile device for reducing specific absorption rate

A mobile device for reducing SAR (Specific Absorption Rate), comprising:

• a grounding radiation element, coupled to a ground voltage;
• a feeding radiation element, having a feeding point;
• a main radiation element, coupled to the feeding radiation element;
• a first side radiation element, coupled to the feeding radiation element, wherein the main radiation element is coupled through the first side radiation element to a first grounding point on the grounding radiation element;
• a second side radiation element, wherein the main radiation element is further coupled through the second side radiation element to a second grounding point on the grounding radiation element;
• and
• a dielectric substrate, wherein the grounding radiation element, the feeding radiation element, the main radiation element, the first side radiation element, and the second side radiation element are disposed on the dielectric substrate;
• wherein an antenna structure is formed by the grounding radiation element, the feeding radiation element, the main radiation element, the first side radiation element, and the second side radiation element;
• wherein the main radiation element and the feeding radiation element have a plurality of edge notches;
• wherein a closed slot region is surrounded by the grounding radiation element, the feeding radiation element, the main radiation element, the first side radiation element, and the second side radiation element;
• wherein the closed slot region comprises a first branch portion, a second branch portion, and a widening portion;
• wherein the first branch portion of the closed slot region is positioned between the feeding radiation element and the main radiation element.