A combination antenna includes a conductive block having at least one electrical component mounted on the surface. A metallic housing is connected to the conductive block via at least one electronic element having a front surface and a rear surface. The front surface includes one or more plates separated by gaps of a predetermined width. The rear surface includes a continuous plate separated from the front surface by a gap of a second predetermined width. One or more antenna feeds are disposed between the front surface and the rear surface of the metallic housing and are connected to the metallic housing directly or via the at least one electronic element. A grounding plane includes one or more grounding points connected to the front surface and the rear surface directly or via the at least one electronic element.

The present disclosure includes a first circuit that is connected between a power feed port and an antenna port, and a second circuit that is connected between the power feed port and the ground or between the antenna port and the ground. The first circuit is a circuit in which for example a first variable capacitance element is connected in series with a first inductor, and the second circuit is a circuit in which for example a second variable capacitance element is connected in parallel with a second inductor. A switch performs switching at least between a first state in which a second end of the second circuit is connected to a first end of the first circuit and a second state in which the second end of the second circuit is connected to a second end of the first circuit.

The present disclosure includes a first circuit that is connected between a power feed port and an antenna port, and a second circuit that is connected between the power feed port and the ground or between the antenna port and the ground. The first circuit is a circuit in which for example a first variable capacitance element is connected in series with a first inductor, and the second circuit is a circuit in which for example a second variable capacitance element is connected in parallel with a second inductor. A switch performs switching at least between a first state in which a second end of the second circuit is connected to a first end of the first circuit and a second state in which the second end of the second circuit is connected to a second end of the first circuit.

Generally discussed herein are techniques, software, apparatuses, and systems configured for impedance matching. An impedance matching tuner can include a first tunable capacitor arranged in series with a radio frequency (RF) input, a second tunable capacitor arranged in shunt with the RF input, a third tunable capacitor and a first inductance device arranged in parallel with each other and in shunt with the RF input, and a fourth tunable capacitor and a second inductance device arranged in parallel with each other and in series with the RF input.

A device assembly applied to a mobile terminal and a mobile terminal are provided. The device assembly includes a fingerprint assembly The fingerprint assembly includes a fingerprint tray, a fingerprint module, and a conductive assembly. The fingerprint tray is electrically connected to a ground of a circuit board of the mobile terminal. The fingerprint module is disposed above the fingerprint tray. The conductive assembly is disposed between the fingerprint tray and fingerprint module.

The invention relates to a method for automatically adjusting one or more tunable passive antennas and a single-input-port and single-output-port tuning unit. The invention also relates to an apparatus for radio communication using this method, for instance a radio transceiver. An apparatus for radio communication of the invention comprises: a tunable passive antenna; a feeder; a single-input-port and single-output-port tuning unit; a sensing unit; a transmission and signal processing unit which applies an excitation to the input port, which delivers one or more antenna adjustment instructions, and which delivers one or more tuning unit adjustment instructions; and a control unit which delivers one or more antenna control signals to the tunable passive antenna, and one or more tuning control signals to the single-input-port and single-output-port tuning unit.

A mobile terminal, including metal back cover including metal cover plate, first and second metal frames respectively arranged at two opposite sides thereof for forming first gap, first metal frame comprising first, second and third radiating portions; antenna module fixed on metal back cover close to first metal frame, antenna module comprising system ground connected with metal cover plate, and antenna circuit board connected with system ground and first metal frame, antenna circuit board including grounding, feeding, matching circuit and tuner; grounding circuit comprises grounding point and grounding pin and going across first gap; the feeding circuit comprises feeding point and feeding pin and going across first gap; first, second and third radiating portions are configured that when tuning in middle-high frequency, first and second radiating portions serve as radiator of antenna module, and when tuning in low frequency, second and third radiating portions serve as radiator.

A multi-band antenna is provided. The multi-band antenna includes a plurality of radiator patterns that are configured to operate according to different frequency bands, a plurality of feeding units that are respectively connected to different contact points of the antenna radiator for connecting feeding units of the plurality of feeding units to at least one radiator pattern included in the plurality of radiator patterns, and a switching unit configured to switch between feeding units of the plurality of feeding units for connecting at least one radiator pattern included in the plurality of radiator patterns to the switched feeding unit.

A multi-band antenna is provided. The multi-band antenna includes a plurality of radiator patterns that are configured to operate according to different frequency bands, a plurality of feeding units that are respectively connected to different contact points of the antenna radiator for connecting feeding units of the plurality of feeding units to at least one radiator pattern included in the plurality of radiator patterns, and a switching unit configured to switch between feeding units of the plurality of feeding units for connecting at least one radiator pattern included in the plurality of radiator patterns to the switched feeding unit.

An embedded antenna system is described for use with metallized enclosures and housings used with wireless communication devices. One or multiple radiators are coupled to a metal cover, with ground points established on the metal cover to improve radiation efficiency and control the frequency response of the antenna system. Dynamic tuning methods are described wherein detuning of the antenna system from sources such as body-loading are compensated by adjusting impedance properties of the combination of radiator and metallized cover.