A vehicle antenna device includes an antenna base, an antenna case that covers the antenna base, and an antenna element positioned inside the antenna case and including a capacitive element and a coil element. The coil element includes a supporting body and a winding held by the supporting body, and the supporting body has a support area and projections that are formed along an axial direction of the coil element and hold the winding in the support area.

A unit cell can be used for a metasurface, metamaterial, or beamforming antenna. The unit cell includes a metal layer attached to a substrate. The metal layer defines an iris opening for the unit cell. One or more tunable capacitance devices are positioned within or across the iris opening. Each tunable capacitance device is to tune resonance frequency of the unit cell. Mass transfer technologies or self-assembly processes may be used to position the tunable capacitance devices.

An electronic device may include ground structures and peripheral conductive housing structures defining opposing edges of a slot element. A monopole element may overlap the slot element. The monopole element may be directly fed radio-frequency signals by an antenna feed coupled to the monopole element. The monopole element may radiate the radio-frequency signals in a first frequency band while indirectly feeding the radio-frequency signals to the slot element via near-field electromagnetic coupling. The slot element may radiate the radio-frequency signals in a second frequency band that is lower than the first frequency band. The monopole element and the slot element may collectively form a multi-band antenna that exhibits a relatively wide bandwidth.

An antenna system for use with a media device is provided. The antenna system includes a multi-mode active antenna configurable to operate in a plurality of modes. Each mode of the plurality of has a distinct radiation pattern. The antenna system includes a supplemental tuner that is separate from a primary tuner associated with the media device. The antenna system includes a switching device movable between at least two positions to selectively couple the active antenna to the supplemental tuner. When the switching device is in a first position, the active antenna is coupled to the supplemental tuner. When the switching device is in a second position, the active antenna is coupled to the media device.

An antenna system for use with a media device is provided. The antenna system includes a multi-mode active antenna configurable to operate in a plurality of modes. Each mode of the plurality of has a distinct radiation pattern. The antenna system includes a supplemental tuner that is separate from a primary tuner associated with the media device. The antenna system includes a switching device movable between at least two positions to selectively couple the active antenna to the supplemental tuner. When the switching device is in a first position, the active antenna is coupled to the supplemental tuner. When the switching device is in a second position, the active antenna is coupled to the media device.

An electronic device may include ground structures and peripheral conductive housing structures defining opposing edges of a slot element. A monopole element may overlap the slot element. The monopole element may be directly fed radio-frequency signals by an antenna feed coupled to the monopole element. The monopole element may radiate the radio-frequency signals in a first frequency band while indirectly feeding the radio-frequency signals to the slot element via near-field electromagnetic coupling. The slot element may radiate the radio-frequency signals in a second frequency band that is lower than the first frequency band. The monopole element and the slot element may collectively form a multi-band antenna that exhibits a relatively wide bandwidth.

An electronic device includes a casing, a circuit board and at least one antenna module. The casing has an accommodating space and an inner side wall surrounding the accommodating space. The circuit board is disposed in the accommodating space. Each of the antenna modules includes a first radiator and a second radiator. The first radiator is disposed on the circuit board and adjacent to the inner side wall, and includes a first section, a second section and a third section extending from the first section in opposite directions respectively. The first section includes a feeding end, and the third section includes a grounding end. The second radiator is disposed on the inner side wall. A coupling gap is formed between the first radiator and the second radiator.

An apparatus includes a radio frequency (RF) circuit to transmit or receive RF signals, and a partitioned antenna structure. The partitioned antenna structure includes a first portion of a resonator and a first portion of a radiator. The first portion of the resonator comprises less than an entire resonator. The first portion of the radiator comprises less than an entire radiator.

An apparatus includes a radio frequency (RF) circuit to transmit or receive RF signals, and a partitioned antenna structure. The partitioned antenna structure includes a first portion of a resonator and a first portion of a radiator. The first portion of the resonator comprises less than an entire resonator. The first portion of the radiator comprises less than an entire radiator.

An electronic device including an antenna is provided. The electronic device includes a ground plane, an antenna element that is electrically connected to the ground plane through a first electrical path, a receptacle that accommodates an external connector that is electrically connected to the ground plane and comprises a conductive line, and a control circuit that is configured to: detect whether the external connector is inserted into the receptacle, and change the first electrical path to a second electrical path or add the second electrical path to the first electrical path between the antenna element and the ground plane, when the external connector is inserted into the receptacle.