An electronic device includes a camera cover, a wireless communication circuit, a first frame, a second frame and a third frame, extends from a second surface along a part not included in a first surface and the second surface among the periphery of the camera cover, and is connected to the camera cover. The second frame is positioned away from the first frame to form a part of the second surface, and extends from the second surface to form a part of a third surface. The third frame has a gap from the first frame in a specific direction in a first area and is connected to the first frame in a second area. The wireless communication circuit can receive a signal of a specific frequency band by feeding power to a slot structure comprising the gap between the first frame and the third frame.

Example multi-band antennas and communication devices are described. One example multi-band antenna includes a reflection plate and a feed structure. The reflection plate is provided with a slot, and the slot defines one strip conductor. One end of the strip conductor is connected to another part of the reflection plate. The feed structure includes a microstrip line used in a high-frequency antenna element in the multi-band antenna, where the microstrip line is located on one side of the reflection plate, and at least a part of a projection of the microstrip line on the reflection plate falls within a contour range of the strip conductor.

An antenna comprises a planar radiating structure, a ground plane and a feed structure. The radiation structure comprises a plurality of slots arranged symmetrically in concentric rings around an inner portion of the radiating structure. The slots are arranged to create a meandering current path on the radiating structure. The antenna produces an omnidirectional, monopole-like radiation field, and is relatively small with relatively high performance making it suitable for use in a wide variety of applications including those with challenging environments.

An antenna comprises a planar radiating structure, a ground plane and a feed structure. The radiation structure comprises a plurality of slots arranged symmetrically in concentric rings around an inner portion of the radiating structure. The slots are arranged to create a meandering current path on the radiating structure. The antenna produces an omnidirectional, monopole-like radiation field, and is relatively small with relatively high performance making it suitable for use in a wide variety of applications including those with challenging environments.

An antenna includes a first conductor plate and a second conductor plate, the second conductor plate being disposed in the first conductor plate so as to be apart from the first conductor plate with a distance between both plates; wherein the first conductor plate includes a first U-shaped portion, the first U-shaped portion being formed in a U-shape so as to include a first side portion, a second side portion opposed to the first side portion, and a first front portion connected between the first side portion and the second side portion; wherein the second conductor plate includes a second U-shaped portion, the second U-shaped portion being formed in a U-shape so as to include a third side portion, a fourth side portion opposed to the third side portion, and a second front portion connected between the third side portion and the fourth side portion.

An antenna structure includes a dielectric substrate, a ground layer and a radiation layer located at two opposite sides of the dielectric substrate. The ground layer has two first gaps which are symmetrical about a central axis of the antenna structure in a first direction to introduce a radiation zero. The radiation layer has two second gaps which are symmetrical about the central axis, edges of the two second gaps are aligned with edges of the radiation layer in a second direction to introduce another radiation zero. The second direction is perpendicular to the first direction.

An electronic device is provided. The electronic device includes a foldable housing, a flexible display, at least one printed circuit board (PCB), and a wireless communication circuit. The foldable housing includes a hinge structure, a first housing structure connected to the hinge structure and including a first surface facing in a first direction, a second surface facing in a direction opposite to the first direction, and a first lateral member surrounding a first space between the first surface and the second surface, and a second housing structure connected to the hinge structure and including a third surface facing in a second direction, a fourth surface facing in a direction opposite to the second direction, and a second lateral member surrounding a second space between the third surface and the fourth surface.

A system for includes master and sniffer devices. The master device includes: first antennas with different polarized axes; a transmitter transmitting a challenge signal via the first antennas from the vehicle to a slave device, where the slave device is a portable access device; and a receiver receiving a response signal in response to the challenge signal from the slave device. The sniffer device includes: second antennas with different polarized axes; and a receiver receiving, via the second antennas, the challenge signal from the transmitter and the response signal from the slave device. The sniffer device measures when the challenge signal and the response signal arrive at the sniffer device to provide arrival times. The master or sniffer device estimates at least one of a distance from the vehicle to the slave device or a location of the slave device relative to the vehicle based on the arrival times.

A slot antenna and a communication device including the slot antenna are provided. The slot antenna includes: a dielectric layer having a first surface and a second surface opposite to each other, a radiation layer on the first surface of the dielectric layer and having a plurality of slots therein, and a first shielding layer on the second surface of the dielectric layer and electrically connected to the radiation layer.

A slot antenna and a communication device including the slot antenna are provided. The slot antenna includes: a dielectric layer having a first surface and a second surface opposite to each other, a radiation layer on the first surface of the dielectric layer and having a plurality of slots therein, and a first shielding layer on the second surface of the dielectric layer and electrically connected to the radiation layer.