Abstract: An antenna structure has a first resonance mode and a second resonance mode. The antenna structure consists of a first radiation element, a second radiation element, a grounding element, and a signal feeding element. The first radiation element resonates at a first operating frequency band corresponding to the first resonance mode. The second radiation element is extended from a first end of the first radiation element and resonates at a second operating frequency band corresponding to the second resonance mode. The grounding element is extended from a second end of the first radiation element. The signal feeding element is disposed between the first radiation element and the grounding element. The second radiation element, the first radiation element, and the grounding element are formed by bending a slender metal sheet.

Abstract: An antenna with multiple resonating conditions includes a grounding element electrically connected to a ground, a radiating element, a connection element electrically connected between the grounding element and the radiating element, a feed-in element electrically connected between the connection element and the grounding element for receiving feed-in signals, and a radiating-condition generating element electrically connected to the grounding element and extending from the grounding element to the radiating element.

Abstract: An active antenna with a wide bandwidth coverage is disclosed. The active antenna comprises a radiator, comprising at least two feeding points corresponding to two modes, a switch control circuit, for generating a switch control signal, and an active switch circuit, for switching to be coupled to one of the at least two feeding points.

Abstract: An antenna with multiple resonating conditions includes a grounding element electrically connected to a ground, a radiating element, a connection element electrically connected between the grounding element and the radiating element, a feed-in element electrically connected between the connection element and the grounding element for receiving feed-in signals, and a radiating-condition generating element electrically connected to the grounding element and extending from the grounding element to the radiating element.

Abstract: A dual-band antenna includes a ground plane, a loop antenna, and a monopole antenna. The loop antenna is connected to the ground plane, and has a radiator that forms a loop. The radiator has a first end and a second end adjacent to the first end, and is capable of resonating at a first frequency band. The monopole antenna has one end connected to the first end of the radiator of the loop antenna, and is capable of resonating at a second frequency band. A feed point is disposed at a connection between the first end of the radiator of the loop antenna and the monopole antenna. A ground point is disposed at the radiator of the loop antenna proximate to the second end of the radiator.

Abstract: A broadband antenna includes a substrate, a radiator element disposed on a first surface of the substrate, a grounding element, a conductor element, a conductor arm, and a conductor piece disposed on a second surface of the substrate. The conductor element is provided with a feed point. The conductor element interconnects the radiator element and the grounding element and includes a first conductor section, a second conductor section, and a third conductor section interconnecting the first conductor section and the second conductor section. The third conductor section includes a first part, and a second part connected between the first part and the second conductor section. The first conductor section configures the radiator element into a first radiator portion and a second radiator portion. The conductor piece is conductively coupled to the radiator element and overlaps with projections of the first radiator portion, the first conductor section, the first part, and the conductor arm onto the second surface.

Abstract: An antenna structure has a first resonance mode and a second resonance mode. The antenna structure consists of a first radiation element, a second radiation element, a grounding element, and a signal feeding element. The first radiation element resonates at a first operating frequency band corresponding to the first resonance mode. The second radiation element is extended from a first end of the first radiation element and resonates at a second operating frequency band corresponding to the second resonance mode. The grounding element is extended from a second end of the first radiation element. The signal feeding element is disposed between the first radiation element and the grounding element. The second radiation element, the first radiation element, and the grounding element are formed by bending a slender metal sheet.

Abstract: A dual-band antenna includes a ground plane, a loop antenna, and a monopole antenna. The loop antenna is connected to the ground plane, and has a radiator that forms a loop. The radiator has a first end and a second end adjacent to the first end, and is capable of resonating at a first frequency band. The monopole antenna has one end connected to the first end of the radiator of the loop antenna, and is capable of resonating at a second frequency band. A feed point is disposed at a connection between the first end of the radiator of the loop antenna and the monopole antenna. A ground point is disposed at the radiator of the loop antenna proximate to the second end of the radiator.

Abstract: A multi-frequency antenna and an electronic device having the multi-frequency antenna are disclosed. The multi-frequency antenna comprises: a first radiating element including a first end and a second end; a grounding element connected to the first end of the first radiating element; a feeding structure for inputting an electrical signal to the first radiating element; and a second radiating element including a first end and a second end. The first end of the second radiating element includes a transitional portion; and the second radiating element is connected to the second end of the first radiating element by the transitional portion. So that the first radiating element forms a first current path to generate a first resonant mode; and the second radiating element forms a second current path to generate a second resonant mode.

Abstract: An antenna and an electronic device having the antenna are disclosed. The antenna comprises: a base board having a first surface and a second surface; a first radiating element disposed on the first surface; a grounding element disposed on the first surface; a feeding structure disposed on the first surface, wherein the first radiating element is electrically coupled with the feeding structure and the grounding element; and a second radiating element disposed on the first surface or the second surface, wherein the second radiating element adjusts a first resonant mode or generates a second resonant mode by inductive coupling.

Abstract: An antenna structure includes a conductive film, a radiation element, and a feeding point. The radiation element includes a first radiation object and a second radiation object. The second radiation object has a first radiation arm, a second radiation arm, and a third radiation arm. The first radiation arm is coupled to the first radiation object, and the second radiation arm is extended from the first radiation arm to be coupled to the third radiation arm, wherein there is a first angle included between the first radiation arm and the second radiation arm, and there is a second angle included between the second radiation arm and the third radiation arm. The feeding point is coupled between the conductive film and the radiation element.