An electronic device includes an antenna including a ground part, a feeding part, and a radiator and a first switch interposed between the feeding part and the radiator. A signal supplied through the feeding part is transmitted through a first path, a second path, or a third path that connects the feeding part to the radiator. The first switch is configured to change a connection state of the second path and the third path, and the third path includes a variable capacitor.

A mobile terminal is disclosed. The mobile terminal includes a housing having an accommodation space, the housing including a metal frame; a mainboard received in the accommodation space and including a ground point provided on a surface thereof; an antenna system grounded through the mainboard. The antenna system includes a main antenna including a low-frequency feeding portion and a high-frequency feeding portion both of which are respectively connected to the metal frame; and a matching system configured on the metal frame for adjusting the frequency band of the antenna system. The high-frequency feeding portion is isolated from the low-frequency feeding portion through a LC filtering system.

A mobile terminal is disclosed. The mobile terminal includes a housing having an accommodation space, the housing including a metal frame; a mainboard received in the accommodation space and including a ground point provided on a surface thereof; an antenna system grounded through the mainboard. The antenna system includes a main antenna including a low-frequency feeding portion and a high-frequency feeding portion both of which are respectively connected to the metal frame; and a matching system configured on the metal frame for adjusting the frequency band of the antenna system. The high-frequency feeding portion is isolated from the low-frequency feeding portion through a LC filtering system.

The present application provides an antenna system for use in an electronic device. The antenna system includes a conductive substrate. The antenna system further includes a conductive element, which extends along a length between two ends a distance away from the conductive substrate. An area between the conductive substrate and the conductive element form at least part of a loop which is internal to the antenna system. The antenna system still further includes a differential signal source coupled between two points along the length of the conductive element. Each of the two points are proximate a respective one of the two ends of the conductive element. The differential signal source is coupled to each of the two points via a high frequency blocking circuit. Further yet, the antenna system includes an alternative signal source coupled to the conductive element between the two ends of the conductive element toward a center of the conductive element via a low frequency blocking circuit.

A radiating system comprises a radiating structure including two or more radiation boosters for transmission and reception of electromagnetic wave signals, a radiofrequency system and an external port. The radiating system is capable of operation in at least a first and second frequency regions which are preferably separated. The radiofrequency system comprises two or more matching networks and a combining structure at which, in transmission, electromagnetic wave signals from the external port are substantially separated and coupled to each radiation booster based on the frequency of the signals; and, in reception, signals from each radiation booster are combined and coupled to the external port. The radiofrequency system provides impedance matching to the radiating structure in the first and second frequency regions at the external port. An advantage of such radiating system is that signals from the first and second frequency regions are fed to and retrieved in one single port.

A radiating system comprises a radiating structure including two or more radiation boosters for transmission and reception of electromagnetic wave signals, a radiofrequency system and an external port. The radiating system is capable of operation in at least a first and second frequency regions which are preferably separated. The radiofrequency system comprises two or more matching networks and a combining structure at which, in transmission, electromagnetic wave signals from the external port are substantially separated and coupled to each radiation booster based on the frequency of the signals; and, in reception, signals from each radiation booster are combined and coupled to the external port. The radiofrequency system provides impedance matching to the radiating structure in the first and second frequency regions at the external port. An advantage of such radiating system is that signals from the first and second frequency regions are fed to and retrieved in one single port.

An earbud system is described. The earbud system may include a primary earbud having a primary antenna. The earbud system may further include a secondary earbud having a secondary antenna. The primary antenna may have a higher effective radiation area than the secondary antenna. The secondary antenna may have a higher gain than the primary antenna.

An antenna device includes a slot, a connecting assembly, a first capacitor and a match circuit. The slot is defined in a shell of the mobile terminal. The slot separates the shell into a first part and a second part, and the first part couples with a mainboard via a feeding point to form a slot antenna. The connecting assembly connects the first part with the second part. The first capacitor couples the first part with the feeding point. The match circuit couples the first part with the feeding point.

An antenna device includes a slot, a connecting assembly, a first capacitor and a match circuit. The slot is defined in a shell of the mobile terminal. The slot separates the shell into a first part and a second part, and the first part couples with a mainboard via a feeding point to form a slot antenna. The connecting assembly connects the first part with the second part. The first capacitor couples the first part with the feeding point. The match circuit couples the first part with the feeding point.

A metal body antenna having loop type radiation elements in which a housing unit is used as an antenna includes a radiation element supplied with a signal from a feeding power port, a ground coupled to the radiation element by loop coupling and in which an induction current is generated, and a frame bezel unit having an open end part separated from the ground by a dielectric and a gap. The frame bezel unit having the open end part supplied with an electric current induced into the ground is connected, and the metal body antenna operates in a wideband in multiple bands having an electrical length of a half wavelength. Accordingly, the bezel unit of a frame unit is effectively used and all of the Penta bands (i.e., GSM850, EGSM, DCS, PCS, and W2100) used in mobile phones is satisfied through a wideband multi-antenna structure having a small radiation loss.