Abstract: An antenna structure includes a metal housing, a feed portion, and a ground portion. The metal housing includes a front frame, a backboard, and a side frame. The side frame defines a slot and the front frame defines a first gap and a second gap. The metal housing is divided into at least a first radiating portion and a second radiating portion by the slot and the first and second gaps. The feed portion is electrically connected to the first radiating portion. The ground portion is electrically connected to the first radiating portion. The second radiating portion includes a first radiating section, a second radiating section, and a connecting section perpendicularly connected to the first radiating section, the second radiating section, and the backboard. The first radiating section and the second radiating section are both parallel to the first radiating portion.

Abstract: An antenna structure includes a metal housing, a first feed portion, a first ground portion, a second ground portion, and a radiator. The metal housing includes a front frame, a backboard, and a side frame. The side frame defines a slot and the front frame defines a gap. The metal housing is divided into at least a long portion and a short portion by the slot and the gap. One end of the first feed portion is electrically connected to the long portion for feeding current to the long portion and another end of the first feed portion is electrically connected to the backboard. The first and second ground portions are both electrically connected to the long portion for grounding the long portion. The radiator is positioned in the metal housing, electrically connected to the backboard, and is spaced apart from the short portion.

Abstract: An antenna structure includes a metal housing, a first feed portion, a first ground portion, a second ground portion, and a radiator. The metal housing includes a front frame, a backboard, and a side frame. The side frame defines a slot and the front frame defines a gap. The metal housing is divided into at least a long portion and a short portion by the slot and the gap. One end of the first feed portion is electrically connected to the long portion for feeding current to the long portion and another end of the first feed portion is electrically connected to the backboard. The first and second ground portions are both electrically connected to the long portion for grounding the long portion. The radiator is positioned in the metal housing, electrically connected to the backboard, and is spaced apart from the short portion.

Abstract: An antenna structure includes a metal housing, a feed portion, and a ground portion. The metal housing includes a front frame, a backboard, and a side frame. The side frame defines a slot and the front frame defines a first gap and a second gap. The metal housing is divided into at least a first radiating portion and a second radiating portion by the slot and the first and second gaps. The feed portion is electrically connected to the first radiating portion. The ground portion is electrically connected to the first radiating portion. The second radiating portion includes a first radiating section, a second radiating section, and a connecting section perpendicularly connected to the first radiating section, the second radiating section, and the backboard. The first radiating section and the second radiating section are both parallel to the first radiating portion.

Abstract: A wearable device includes a metal body, a nonconductive partition, and a metal loop. The metal body substantially has a hollow structure. The nonconductive partition is disposed on the metal body. The metal loop is disposed on the nonconductive partition. The metal loop has a feeding point and forms an antenna structure of the wearable device.

Abstract: A broadband antenna includes a grounding plane, a radiation unit which has first and second radiation components disposed adjacent to the grounding plane, and an impedance adjusting unit which is operable to adjust an impedance upon receipt of and according to a control signal. A length of a resonance path of the antenna is equal to an overall electrical length of from the first radiation component, the impedance adjusting unit, to the second terminal.

Abstract: A tunable multiband antenna includes a first radiation conductor spaced apart from a grounding conductor, a second radiation conductor spaced apart from the grounding conductor and connected to the first radiation conductor, a first tuning unit electrically connected between a signal source and the first radiation conductor and operable to provide different impedances and a second tuning unit electrically connected between the grounding conductor and the second radiation conductor and operable to provide different impedances.