Abstract: 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.

Abstract: 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.

Abstract: An apparatus and a method of realizing an antenna matching in accordance with a user's body effect and a state of a mobile device are provided. The method includes determining a state of the mobile device on a basis of a call mode and at least one of whether an external device is connected to the mobile device, whether a receiver is being used, whether a speaker is being used, and whether a proximity sensor is activated, determining an optimal Tunable Matching Network (TMN) circuit adjustment value in accordance with the determined state, and performing the antenna matching in accordance with the optimal TMN circuit adjustment value.

Abstract: An apparatus and method for antenna matching according to a position and an angle of a portable terminal is provided. Operations of the portable terminal include, when at least one of a position and an angle of the portable terminal is changed, determining an optimal Tunable Matching Network (TMN) set value corresponding to the position and the angle, and performing antenna matching according to the optimal TMN set value.

Abstract: An apparatus and a method of realizing an antenna matching in accordance with a user's body effect and a state of a mobile device are provided. The method includes determining a state of the mobile device on a basis of a call mode and at least one of whether an external device is connected to the mobile device, whether a receiver is being used, whether a speaker is being used, and whether a proximity sensor is activated, determining an optimal Tunable Matching Network (TMN) circuit adjustment value in accordance with the determined state, and performing the antenna matching in accordance with the optimal TMN circuit adjustment value.

Abstract: An apparatus and method for antenna matching according to a position and an angle of a portable terminal is provided. Operations of the portable terminal include, when at least one of a position and an angle of the portable terminal is changed, determining an optimal Tunable Matching Network (TMN) set value corresponding to the position and the angle, and performing antenna matching according to the optimal TMN set value.

Abstract: An antenna device for a portable wireless terminal including a main built-in antenna for transmitting and receiving signals of one and more frequency bands is provided. The antenna device includes an external case on which a wireless terminal is disposed. The external case comprises an antenna radiator of at least one. In addition, the antenna device includes a control part for selectively controlling use of at least one of the at least one antenna radiator and a main built-in antenna of the wireless terminal.

Abstract: Disclosed is a built-in type antenna apparatus for a portable terminal which separates an antenna from a slot antenna and includes an additional sub-antenna. The built-in type antenna apparatus includes a first planar antenna having a shorting point and a feeding point; a second planar antenna provided at a position adjacent to the first planar antenna, the second planar antenna having a shorting point and providing at least one slot; and a sub-antenna electrically connected to the first planar antenna and electromagnetically coupled with the second planar antenna.

Abstract: Disclosed is an antenna apparatus for a sliding-type portable terminal having a first housing and a second housing adapted to slide along the longitudinal direction of the first housing including an external antenna having a stationary antenna portion extending along the longitudinal direction and having an end fixed on the first housing and at least one movable antenna portion extending along the longitudinal direction and having the other end fixed to the second housing so that, as the second housing slides, it retracts in and extends out of the stationary antenna portion. The antenna apparatus for a sliding-type portable terminal has an external antenna which, together with the embedded antenna, compensates for the deteriorated performance of the embedded antenna during a speech mode. In addition, the antenna apparatus does not affect the design of the terminal and provides various types of terminal design, because it does not protrudes out of the terminal.

Abstract: Disclosed is a built-in type antenna apparatus for a portable terminal which separates an antenna from a slot antenna and includes an additional sub-antenna. The built-in type antenna apparatus includes a first planar antenna having a shorting point and a feeding point; a second planar antenna provided at a position adjacent to the first planar antenna, the second planar antenna having a shorting point and providing at least one slot; and a sub-antenna electrically connected to the first planar antenna and electromagnetically coupled with the second planar antenna.

Abstract: Disclosed is an antenna apparatus for a sliding-type portable terminal having a first housing and a second housing adapted to slide along the longitudinal direction of the first housing including an external antenna having a stationary antenna portion extending along the longitudinal direction and having an end fixed on the first housing and at least one movable antenna portion extending along the longitudinal direction and having the other end fixed to the second housing so that, as the second housing slides, it retracts in and extends out of the stationary antenna portion. The antenna apparatus for a sliding-type portable terminal has an external antenna which, together with the embedded antenna, compensates for the deteriorated performance of the embedded antenna during a speech mode. In addition, the antenna apparatus does not affect the design of the terminal and provides various types of terminal design, because it does not protrudes out of the terminal.