The present disclosure provides an antenna and an electronic device. The antenna includes: a radiator, a feed terminal, a capacitive circuit, a resonant circuit, and a ground terminal. The feed terminal is electrically connected to a preset connection point on the radiator via the capacitive circuit. A first end of the resonant circuit is electrically connected to the radiator, and a second end of the resonant circuit is electrically connected to the ground terminal.

A wireless device comprises a radiating system that comprises: an antenna system, a ground plane, and a matching network. The antenna system comprises an antenna component including a first multi-section antenna component comprising two sections, each comprising a conductive element. The matching network connected to the antenna system for impedance matching to a first frequency range. The radiating system operates in a frequency range of operation including the first frequency range, the first frequency range comprising a first highest frequency and a first lowest frequency. The first antenna component has a maximum size larger than 1/30 times and smaller than times a free-space wavelength corresponding to the lowest frequency of operation. The conductive elements in the different sections of the first antenna component are spaced apart from each other.

A wireless device comprises a radiating system that comprises: an antenna system, a ground plane, and a matching network. The antenna system comprises an antenna component including a first multi-section antenna component comprising two sections, each comprising a conductive element. The matching network connected to the antenna system for impedance matching to a first frequency range. The radiating system operates in a frequency range of operation including the first frequency range, the first frequency range comprising a first highest frequency and a first lowest frequency. The first antenna component has a maximum size larger than 1/30 times and smaller than times a free-space wavelength corresponding to the lowest frequency of operation. The conductive elements in the different sections of the first antenna component are spaced apart from each other.

An antenna includes first and second feed points spaced apart at a same side of a device main body, and a first grounding point in a receiving area. The first and second feed points and the first grounding point are respectively electrically connected with a first contact point at a first frame, a second contact point at a second frame, and a third contact point at the first frame and a fourth contact point on the main body. An electrical connection body including the first feed point, the first and third contact points, the first grounding point, and the fourth contact point constitutes a first antenna. An electrical connection body including the second feed point, the second contact point, and junction point of the second frame and the main body constitutes a second antenna. The first grounding point is adjacent to the second antenna.

An antenna includes first and second feed points spaced apart at a same side of a device main body, and a first grounding point in a receiving area. The first and second feed points and the first grounding point are respectively electrically connected with a first contact point at a first frame, a second contact point at a second frame, and a third contact point at the first frame and a fourth contact point on the main body. An electrical connection body including the first feed point, the first and third contact points, the first grounding point, and the fourth contact point constitutes a first antenna. An electrical connection body including the second feed point, the second contact point, and junction point of the second frame and the main body constitutes a second antenna. The first grounding point is adjacent to the second antenna.

An antenna structure of few components and reduced size which functions by switching between components to achieve radiation in three different frequency bands includes two radiating portions, a feeding portion, a matching circuit, and a first switching circuit. With the first switching circuit closed, current flows along a first radiating portion to activate a first frequency band. A second radiating portion obtains the current from the first switching circuit by coupling with the first radiating portion, to activate a second frequency band. Current in the first radiating portion can activate a third frequency band. With the first switching circuit open, current in the first radiating portion activates radiation in the first frequency band. The second radiating portion can radiate in second frequency band by coupling current from the first radiating portion. Frequency multiplication of the first frequency band can activate the third frequency band.

An antenna structure of few components and reduced size which functions by switching between components to achieve radiation in three different frequency bands includes two radiating portions, a feeding portion, a matching circuit, and a first switching circuit. With the first switching circuit closed, current flows along a first radiating portion to activate a first frequency band. A second radiating portion obtains the current from the first switching circuit by coupling with the first radiating portion, to activate a second frequency band. Current in the first radiating portion can activate a third frequency band. With the first switching circuit open, current in the first radiating portion activates radiation in the first frequency band. The second radiating portion can radiate in second frequency band by coupling current from the first radiating portion. Frequency multiplication of the first frequency band can activate the third frequency band.

The disclosure provides a finger type antenna, including a short-circuit portion, a feeding portion, an open-circuit portion, a ground portion, and a coplanar waveguide. The short-circuit portion has a first end and a second end. The feeding portion has a first end and a second end, wherein the first end of the feeding portion is coupled to the first end of the short-circuit portion. The open-circuit portion includes at least three antenna elements, wherein each antenna element has a first end and a second end, and the first ends of the antenna elements are coupled to each other via the feeding portion. The coplanar waveguide is connected to the second end of the short-circuit portion, the second end of the feeding portion, and the ground portion.

The disclosure provides a finger type antenna, including a short-circuit portion, a feeding portion, an open-circuit portion, a ground portion, and a coplanar waveguide. The short-circuit portion has a first end and a second end. The feeding portion has a first end and a second end, wherein the first end of the feeding portion is coupled to the first end of the short-circuit portion. The open-circuit portion includes at least three antenna elements, wherein each antenna element has a first end and a second end, and the first ends of the antenna elements are coupled to each other via the feeding portion. The coplanar waveguide is connected to the second end of the short-circuit portion, the second end of the feeding portion, and the ground portion.

An electronic device such as a wristwatch may have a housing with metal sidewalls and a display having conductive display structures. The display structures may be separated from the sidewalls by a slot for an antenna that runs around the display module. A conductive interconnect may be coupled between the sidewalls and the display structures. A feed and tuning element may be coupled between the display structures and the sidewalls. A first length of the slot from the interconnect to the tuning element may radiate in a satellite band and a cellular band. A second length of the slot from the interconnect to the feed may radiate in a 2.4 GHz band. Harmonics of the second length may radiate in bands at and above 5.0 GHz. If desired clip and blade structures may form conductive paths for coupling antenna elements.