Abstract: A wearable device includes a feeding radiation element, a ground element, a connection radiation element, an additional radiation element, a first grounding radiation element, a second grounding radiation element, and a carrier element. The feeding radiation element has a positive feeding point. The ground element has a negative feeding point. The additional radiation element is coupled through the connection radiation element to the feeding radiation element. The first grounding radiation element is coupled to the ground element. The first grounding radiation element is adjacent to the feeding radiation element. The second grounding radiation element is coupled to the ground element. The second grounding radiation element is adjacent to the feeding radiation element. An antenna structure is formed by the feeding radiation element, the ground element, the connection radiation element, the additional radiation element, the first grounding radiation element, and the second grounding radiation element.

Abstract: An antenna structure includes a feeding radiation element, a first radiation element, a second radiation element, an extension radiation element, and a dielectric substrate. The feeding radiation element has a feeding point. The first radiation element is coupled to a ground voltage. The first radiation element is adjacent to the feeding radiation element. The second radiation element is coupled to the ground voltage. The second radiation element is adjacent to the feeding radiation element. The extension radiation element is coupled to the first radiation element. The feeding radiation element and the second radiation element are at least partially surrounded by the first radiation element. The feeding radiation element, the first radiation element, the second radiation element, and the extension radiation element are all disposed on the dielectric substrate.

Abstract: An antenna structure includes a feeding radiation element, a first grounding radiation element, a second grounding radiation element, a connection radiation element, an extension radiation element, and a dielectric substrate. The feeding radiation element has a feeding point. The first grounding radiation element has a first grounding point. The first grounding radiation element is adjacent to the feeding radiation element. The second grounding radiation element has a second grounding point. The connection radiation element is coupled between the first grounding radiation element and the second grounding radiation element. The extension radiation element is coupled to the connection radiation element. A closed slot is surrounded by the connection radiation element and the extension radiation element.

Abstract: An antenna structure includes a feeding radiation element, a first radiation element, a second radiation element, a third radiation element, and a carrier element. The feeding radiation element has a feeding point. The first radiation element is coupled to the feeding radiation element. The first radiation element has a meandering structure. The second radiation element is coupled to the feeding radiation element. The second radiation element is adjacent to the first radiation element. The third radiation element is coupled to the ground voltage. The third radiation element is adjacent to the second radiation element. The feeding radiation element, the first radiation element, the second radiation element, and the third radiation element are disposed on the carrier element.

Abstract: A wearable device includes a first radiation metal element, a second radiation metal element, a ground metal element, a third radiation metal element, and a carrier element. The first radiation metal element is coupled to a positive feeding point. The second radiation metal element is coupled to the positive feeding point. The ground metal element is coupled to a negative feeding point. The third radiation metal element is adjacent to the ground metal element. A coupling gap is formed between the third radiation metal element and the ground metal element. The first radiation metal element, the second radiation metal element, the ground metal element, and the third radiation metal element are disposed on the carrier element. An antenna structure is formed by the first radiation metal element, the second radiation metal element, the ground metal element, and the third radiation metal element.

Abstract: A wearable device includes a feeding radiation element, a connection radiation element, a bifurcate radiation element, a shorting radiation element, an extension radiation element, and a carrier element. The feeding radiation element has a feeding point. The connection radiation element is coupled to the feeding radiation element. The bifurcate radiation element is coupled to the connection radiation element. The connection radiation element is also coupled through the shorting radiation element to a grounding point. The extension radiation element is coupled to the feeding radiation element. The feeding radiation element, the connection radiation element, the bifurcate radiation element, the shorting radiation element, and the extension radiation element are disposed on the carrier element. An antenna structure is formed by the feeding radiation element, the connection radiation element, the bifurcate radiation element, the shorting radiation element, and the extension radiation element.

Abstract: An antenna structure includes a main ground plane, a protruding ground plane, a feeding radiation element, a connection radiation element, a shorting radiation element, a first radiation element, and a second radiation element. The protruding ground plane is coupled to the main ground plane. The feeding radiation element has a feeding point. The connection radiation element is coupled to the feeding radiation element. The connection radiation element is further coupled through the shorting radiation element to the protruding ground plane. The first radiation element is coupled to the feeding radiation element. The second radiation element is coupled to the connection radiation element. The protruding ground plane further includes an extension portion. The first radiation element is adjacent to the extension portion of the protruding ground plane.

Abstract: An antenna structure includes a first radiation element, a second radiation element, a third radiation element, a fourth radiation element, a fifth radiation element, and a nonconductive support element. The first radiation element has a feeding point. The second radiation element is coupled to the first radiation element. The third radiation element is coupled to a ground voltage and adjacent to the first radiation element. The fourth radiation element is coupled to the first radiation element. The fifth radiation element is coupled to the ground voltage and adjacent to the second radiation element. The first radiation element, the second radiation element, the third radiation element, and the fourth radiation element are at least partially surrounded by the fifth radiation element. The first radiation element, the second radiation element, the third radiation element, the fourth radiation element, and the fifth radiation element are disposed on the nonconductive support element.

Abstract: A wearable device includes a ground element, a first radiation element, a second radiation element, a third radiation element, a fourth radiation element, a fifth radiation element, and a sixth radiation element. The first radiation element has a feeding point. The first radiation element is coupled to the ground element. The third radiation element is coupled through the second radiation element to the first radiation element. The fourth radiation element is coupled through the second radiation element to the first radiation element. The fifth radiation element is coupled to the first radiation element. The sixth radiation element is coupled to the ground element. The sixth radiation element is adjacent to the fourth radiation element. An antenna structure is formed by the first radiation element, the second radiation element, the third radiation element, the fourth radiation element, the fifth radiation element, and the sixth radiation element.

Abstract: An antenna structure includes a ground element, a feeding radiation element, a first radiation element, a second radiation element, a shorting radiation element, a third radiation element, and a fourth radiation element. The feeding radiation element has a feeding point. The first radiation element is coupled to the feeding radiation element. The second radiation element is coupled to the feeding radiation element. The second radiation element and the first radiation element substantially extend in opposite directions. The feeding radiation element is further coupled through the shorting radiation element to the ground element. The third radiation element is coupled to the ground element. The third radiation element is adjacent to the first radiation element. The fourth radiation element is coupled to the ground element. The fourth radiation element is adjacent to the second radiation element.

Abstract: An antenna structure includes a main ground plane, a protruding ground plane, a feeding radiation element, a connection radiation element, a shorting radiation element, a first radiation element, and a second radiation element. The protruding ground plane is coupled to the main ground plane. The feeding radiation element has a feeding point. The connection radiation element is coupled to the feeding radiation element. The connection radiation element is further coupled through the shorting radiation element to the protruding ground plane. The first radiation element is coupled to the feeding radiation element. The second radiation element is coupled to the connection radiation element. The protruding ground plane further includes an extension portion. The first radiation element is adjacent to the extension portion of the protruding ground plane.

Abstract: An antenna structure includes a ground element, a first radiation element, a second radiation element, a third radiation element, and a nonconductive support element. The first radiation element is coupled to a first grounding point on the ground element. The second radiation element has a feeding point. The second radiation element is adjacent to the first radiation element. The third radiation element is coupled to a second grounding point on the ground element. The third radiation element is adjacent to the second radiation element. The first radiation element, the second radiation element, and the third radiation element are disposed on the nonconductive support element. The second radiation element is at least partially surrounded by the first radiation element. The third radiation element is at least partially surrounded by the second radiation element.

Abstract: A wearable device includes a ground element, a first radiation element, a second radiation element, a third radiation element, a fourth radiation element, and a fifth radiation element. The first radiation element has a feeding point, and is coupled to a first grounding point on the ground element. A slot region is surrounded by the first radiation element and the ground element. The second radiation element is coupled to a second grounding point on the ground element. The third radiation element is coupled to the second grounding point. The third radiation element and the second radiation element substantially extend in opposite directions. The fourth radiation element and the fifth radiation element are disposed inside the slot region. An antenna structure is formed by the first radiation element, the second radiation element, the third radiation element, the fourth radiation element, and the fifth radiation element.

Abstract: A wearable device includes a frame element and a dielectric substrate. The frame element includes a first metal element, a second metal element, and a third metal element. A first gap is provided between the first metal element and the second metal element. A second gap is provided between the second metal element and the third metal element. A third gap is provided between the third metal element and the first metal element. The dielectric substrate is surrounded by the first metal element, the second metal element, and the third metal element. A first antenna element is formed by the first metal element. A second antenna element is formed by the second metal element. A third antenna element is formed by the third metal element.

Abstract: An antenna structure includes a first radiation element, a second radiation element, a third radiation element, a fourth radiation element, a fifth radiation element, and a nonconductive support element. The first radiation element has a feeding point. The second radiation element is coupled to the first radiation element. The third radiation element is coupled to a ground voltage and adjacent to the first radiation element. The fourth radiation element is coupled to the first radiation element. The fifth radiation element is coupled to the ground voltage and adjacent to the second radiation element. The first radiation element, the second radiation element, the third radiation element, and the fourth radiation element are at least partially surrounded by the fifth radiation element. The first radiation element, the second radiation element, the third radiation element, the fourth radiation element, and the fifth radiation element are disposed on the nonconductive support element.

Abstract: An antenna structure includes a first radiation element, a second radiation element, a third radiation element, a fourth radiation element, a fifth radiation element, and a dielectric substrate. The first radiation element has a feeding point. The second radiation element is coupled to the first radiation element. The third radiation element is coupled to a first grounding point. The third radiation element is further coupled through the fourth radiation element to a second grounding point. The fifth radiation element is coupled to the third radiation element and the fourth radiation element. The fifth radiation element is adjacent to the second radiation element. The first radiation element and the second radiation element are at least partially surrounded by the third radiation element, the fourth radiation element, and the fifth radiation element.

Abstract: A wearable device includes a ground element, a first radiation element, a second radiation element, a third radiation element, a fourth radiation element, and a fifth radiation element. The first radiation element has a feeding point, and is coupled to a first grounding point on the ground element. A slot region is surrounded by the first radiation element and the ground element. The second radiation element is coupled to a second grounding point on the ground element. The third radiation element is coupled to the second grounding point. The third radiation element and the second radiation element substantially extend in opposite directions. The fourth radiation element and the fifth radiation element are disposed inside the slot region. An antenna structure is formed by the first radiation element, the second radiation element, the third radiation element, the fourth radiation element, and the fifth radiation element.

Abstract: An antenna structure includes a ground element, a first radiation element, a second radiation element, a third radiation element, and a nonconductive support element. The first radiation element is coupled to a first grounding point on the ground element. The second radiation element has a feeding point. The second radiation element is adjacent to the first radiation element. The third radiation element is coupled to a second grounding point on the ground element. The third radiation element is adjacent to the second radiation element. The first radiation element, the second radiation element, and the third radiation element are disposed on the nonconductive support element. The second radiation element is at least partially surrounded by the first radiation element. The third radiation element is at least partially surrounded by the second radiation element.

Abstract: A wearable device includes a ground element, a first radiation element, a second radiation element, a third radiation element, a fourth radiation element, a fifth radiation element, and a sixth radiation element. The first radiation element has a feeding point. The first radiation element is coupled to the ground element. The third radiation element is coupled through the second radiation element to the first radiation element. The fourth radiation element is coupled through the second radiation element to the first radiation element. The fifth radiation element is coupled to the first radiation element. The sixth radiation element is coupled to the ground element. The sixth radiation element is adjacent to the fourth radiation element. An antenna structure is formed by the first radiation element, the second radiation element, the third radiation element, the fourth radiation element, the fifth radiation element, and the sixth radiation element.

Abstract: A wearable device includes a first radiation element, a second radiation element, a third radiation element, and a dielectric substrate. The first radiation element has a feeding point. The second radiation element is coupled to a ground voltage, and is disposed adjacent to the first radiation element. The third radiation element is coupled to the ground voltage, and is disposed adjacent to the first radiation element. The third radiation element is at least partially surrounded by the first radiation element. The first radiation element, the second radiation element, and the third radiation element are disposed on the dielectric substrate. An antenna structure is formed by the first radiation element, the second radiation element, and the third radiation element.