Mobile device supporting wideband operation

A mobile device supporting wideband operations, comprising:

• a feeding radiation element, having a feeding point;
• a first radiation element, coupled to the feeding radiation element;
• a second radiation element, coupled to the feeding radiation element, wherein the first radiation element and the second radiation element substantially extend in opposite directions;
• a grounding radiation element, wherein the first radiation element is further coupled through the grounding radiation element to a ground voltage;
• a shorting radiation element, coupled between the feeding radiation element and the grounding radiation element, wherein a closed loop structure is formed by the feeding radiation element, the first radiation element, the grounding radiation element, and the shorting radiation element;
• and
• a third radiation element, coupled to the ground voltage, wherein the third radiation element is adjacent to the feeding radiation element and the second radiation element;
• wherein an antenna structure is formed by the feeding radiation element, the first radiation element, the second radiation element, the grounding radiation element, the shorting radiation element, and the third radiation element.