A wireless device operates in a plurality of frequency bands and/or frequency regions and comprises a radiating system having an RF transceiver, a booster element, a radiation booster, or a modular multi-stage element; a ground plane layer on a PCB, an external port connected to the RF transceiver, and a multiband and/or multi-region radiofrequency system that comprises a switch. The radiating system also comprises a feeding architecture that connects the antenna element or the booster element to the radiofrequency system, the feeding architecture comprising a feeding line connected to a booster or antenna element and at least two feeding line extensions that are connected to a switch of the radiofrequency system and to the feeding line. A multi-region radiofrequency system comprises a switch and at least two matching networks selectable through the switch, the at least two matching networks including two stages: a pre-matching stage and a common matching stage.

A wireless device operates in a plurality of frequency bands and/or frequency regions and comprises a radiating system having an RF transceiver, a booster element, a radiation booster, or a modular multi-stage element; a ground plane layer on a PCB, an external port connected to the RF transceiver, and a multiband and/or multi-region radiofrequency system that comprises a switch. The radiating system also comprises a feeding architecture that connects the antenna element or the booster element to the radiofrequency system, the feeding architecture comprising a feeding line connected to a booster or antenna element and at least two feeding line extensions that are connected to a switch of the radiofrequency system and to the feeding line. A multi-region radiofrequency system comprises a switch and at least two matching networks selectable through the switch, the at least two matching networks including two stages: a pre-matching stage and a common matching stage.

A mobile terminal including a first frame, and a second frame capable of switching a state thereof to an extended state by moving in a first direction from the first frame, and to a contracted state by sliding in a second direction opposite to the first direction, wherein the second frame includes a rear portion for at least partially covering a rear surface of the first frame, wherein the first frame includes a first rear surface exposed rearwardly in the contracted state, a second rear surface located frontwardly of the rear portion and not exposed to the outside in the contracted state, wherein at least a portion of the second rear surface is exposed rearwardly in the extended state, and a third rear surface covered by the rear portion in the contracted state and in the extended state.

A mobile terminal including a first frame, and a second frame capable of switching a state thereof to an extended state by moving in a first direction from the first frame, and to a contracted state by sliding in a second direction opposite to the first direction, wherein the second frame includes a rear portion for at least partially covering a rear surface of the first frame, wherein the first frame includes a first rear surface exposed rearwardly in the contracted state, a second rear surface located frontwardly of the rear portion and not exposed to the outside in the contracted state, wherein at least a portion of the second rear surface is exposed rearwardly in the extended state, and a third rear surface covered by the rear portion in the contracted state and in the extended state.

Provided is a method for matching antenna impedance in a wireless communication system. The method includes determining an approximate reflection coefficient based on an input signal and an output signal of a bidirectional coupler connected to a signal path of an antenna; determining an antenna impedance matching parameter corresponding to the determined approximate reflection coefficient by using a lookup table; and performing antenna impedance matching based on the antenna impedance matching parameter.

Provided is a method for matching antenna impedance in a wireless communication system. The method includes determining an approximate reflection coefficient based on an input signal and an output signal of a bidirectional coupler connected to a signal path of an antenna; determining an antenna impedance matching parameter corresponding to the determined approximate reflection coefficient by using a lookup table; and performing antenna impedance matching based on the antenna impedance matching parameter.

An antenna device includes a dielectric substrate, an emitting electrode, a power feed circuit that feeds power to the emitting electrode, and a filter circuit formed on a path connecting the emitting electrode to the power feed circuit, the filter circuit is constituted by two or more circuits that are cascade connected, each of the two or more circuits is either a HPF or a LPF, and the antenna device does not have a resonant frequency of the emitting electrode and has two or more resonant frequencies different from the resonant frequency of the emitting electrode, each of which is formed by the emitting electrode and a corresponding one of the two or more circuits.

An antenna device includes a dielectric substrate, an emitting electrode, a power feed circuit that feeds power to the emitting electrode, and a filter circuit formed on a path connecting the emitting electrode to the power feed circuit, the filter circuit is constituted by two or more circuits that are cascade connected, each of the two or more circuits is either a HPF or a LPF, and the antenna device does not have a resonant frequency of the emitting electrode and has two or more resonant frequencies different from the resonant frequency of the emitting electrode, each of which is formed by the emitting electrode and a corresponding one of the two or more circuits.

Provided are an antenna apparatus and an electronic device. The antenna apparatus includes a radiator, a near-field communication chip and a first non-near-field communication chip. The radiator includes a ground point and a first feeding point that are spaced apart from each other, and the ground point is grounded. The near-field communication chip is configured to provide a differential excitation current. The first non-near-field communication chip is configured to provide a first non-near-field communication excitation current.

Designs and techniques for manufacturing microelectronic antenna tuners are provided. An example microelectronic antenna system includes a radio frequency integrated circuit comprising a plurality of radio frequency signal ports disposed in a first area, a plurality of tuning devices disposed in a second area of the radio frequency integrated circuit, at least one antenna element disposed on a substrate coupled to the radio frequency integrated circuit, and at least one feedline disposed in the substrate and configured to communicatively couple the at least one antenna element, at least one of the plurality of tuning devices, and one of the plurality of radio frequency signal ports.