A terminal comprises a printed circuit board (PCB), a PCB floor, and a rear cover. The metal frame is disposed at edges of the PCB floor. The PCB floor is disposed between the PCB and the rear cover, and the PCB floor is used to ground electronic components. The antenna apparatus may include a split antenna formed by a split provided on the metal frame, and a slot antenna formed by a slot connecting to the split. The slot may be connected to the split at a middle position on one side of the slot, and the slot may be provided on the metal frame of the terminal or on a PCB floor of the terminal.

A slot antenna device is disposed on a metal case and includes a slot, a first dielectric substrate, a feeding metal branch, a coupling metal branch, and a signal source. The slot is in the metal case and includes a first long side, a second long side, a first short side and a second short side. The first dielectric substrate is on the metal case adjacent to the first short side of the slot and located above the slot. The feeding metal branch is on the first dielectric substrate and above the slot. A first end of the coupling metal branch is connected to the metal case of the first long side, and a second end of the coupling metal branch extends along the first long side and toward the second short side. The signal source is electrically connected to the feeding metal branch and the metal case.

A slot antenna device is disposed on a metal case and includes a slot, a first dielectric substrate, a feeding metal branch, a coupling metal branch, and a signal source. The slot is in the metal case and includes a first long side, a second long side, a first short side and a second short side. The first dielectric substrate is on the metal case adjacent to the first short side of the slot and located above the slot. The feeding metal branch is on the first dielectric substrate and above the slot. A first end of the coupling metal branch is connected to the metal case of the first long side, and a second end of the coupling metal branch extends along the first long side and toward the second short side. The signal source is electrically connected to the feeding metal branch and the metal case.

An ultra-wideband cavity backed slot antenna includes an electrically conductive ground plane having an elongated slot aperture behind which a cavity is formed by electrically conductive surfaces. Within the cavity, a feed structure spanning a substantial portion of the length of the slot is formed from an electrical conductor. The feed can be attached to a coaxial, microstrip, strip-line or other type of transmission line or waveguide. Tuning elements distributed along the feed structure connect the feed to the surface of the cavity.

It is provided an electronic lock for selectively locking a barrier to a surrounding structure. The electronic lock comprises: a locking bolt, a housing comprising metallic material, wherein the housing comprises a through-hole through which the locking bolt can pass; and a wireless communication module. The housing comprises a cut-out forming a slot antenna, wherein the wireless communication module is connected to the housing and thus the slot antenna. The slot antenna is formed on the same surface of the housing through which the locking bolt can pass.

RADAR sensor assemblies/modules, particularly those for vehicles. In some embodiments, the assembly may comprise a waveguide comprising a waveguide groove defined by opposing waveguide groove structures. An antenna structure may be operably coupled with the waveguide. A printed circuit board may be operably coupled with the waveguide and may comprise an electrically conductive top layer, an electrically conductive bottom layer, and a substrate positioned in between the electrically conductive top layer and the electrically conductive bottom layer. The electrically conductive top layer may comprise an opening exposing the substrate, which opening may extend along the waveguide groove in between the opposing waveguide groove structures. This configuration may allow for various parameters of the printed circuit board to be modified to tune a performance of a sensor/antenna.

RADAR sensor assemblies/modules, particularly those for vehicles. In some embodiments, the assembly may comprise a waveguide comprising a waveguide groove defined by opposing waveguide groove structures. An antenna structure may be operably coupled with the waveguide. A printed circuit board may be operably coupled with the waveguide and may comprise an electrically conductive top layer, an electrically conductive bottom layer, and a substrate positioned in between the electrically conductive top layer and the electrically conductive bottom layer. The electrically conductive top layer may comprise an opening exposing the substrate, which opening may extend along the waveguide groove in between the opposing waveguide groove structures. This configuration may allow for various parameters of the printed circuit board to be modified to tune a performance of a sensor/antenna.

An electronic device according to an embodiment may comprise: a housing including a first slit having a length corresponding to a first frequency and a second slit extending from one point of the first slit in a different direction from the first slit and having a length corresponding to a second frequency, and configured to resonate at the first frequency and the second frequency by the first slit and the second slit; a printed circuit board disposed in the housing and at least partially made of a non-conductive material in regions corresponding to the first slit and the second slit; and a power supply unit for supplying power through one point of the housing, adjacent to the first slit or the second slit. Various other embodiments recognized from the specification are also possible.

An electronic device according to an embodiment may comprise: a housing including a first slit having a length corresponding to a first frequency and a second slit extending from one point of the first slit in a different direction from the first slit and having a length corresponding to a second frequency, and configured to resonate at the first frequency and the second frequency by the first slit and the second slit; a printed circuit board disposed in the housing and at least partially made of a non-conductive material in regions corresponding to the first slit and the second slit; and a power supply unit for supplying power through one point of the housing, adjacent to the first slit or the second slit. Various other embodiments recognized from the specification are also possible.

An electronic device is provided in the present disclosure. The electronic device includes a first main body having a first metal shell and a second main body having a second metal shell, where the first metal shell has a first slot; and the second metal shell has a second slot; and further includes an antenna circuit disposed in the first metal shell, where the antenna circuit has a radiator; and the radiator and the first slot satisfy a coupling condition. In response to being in a first state, the radiator and the second slot satisfy the coupling condition, and the radiator radiates a signal through the first slot and the second slot, simultaneously; and in response to being in a second state, the first slot and the second slot do not satisfy the coupling condition, and the radiator radiates the signal through the first slot.