An antenna system comprises an antenna structure configured to operate in at least two cellular communication frequency bands. The antenna structure comprising a ground plane and an antenna element. The ground plane comprises a two-dimensional surface of conductive material arranged within a border that has the shape of an irregular, non-periodic contour-curve, wherein a value Q is given by a ratio of a length of the border contour of the ground plane and a diameter of the smallest circle encompassing the ground plane entirely, wherein the value Q is at least 3. The antenna element is arranged substantially perpendicular to the ground plane, and the ground plane has an opening where the antenna element is arranged. The diameter of the smallest circle encompassing the ground plane entirely is less than one-fifth of a longest free operating wavelength of the antenna element.

An accessory for an electronic device includes: a watch comprising a housing and a band connected to the housing; at least one phased array antenna on the watch, the at least one phased array antenna comprising an array of antenna elements that are configured to form a beam in a determined direction, the at least one phased array antenna being configured to communicate wirelessly with an external device; a local communication system in the watch, the local communication system configured to communicate locally with the electronic device; and a battery in the watch, the battery operatively connected to each of the at least one phased array antenna and the local communication system.

The disclosure concerns an antenna assembly having a substrate with an antenna radiating element and a ground conductor disposed on the substrate, the ground conductor further characterized by a plurality of ground resonators, wherein a length associated with each of the ground resonators increases as the ground resonators are distanced from the antenna radiating element. Additionally, a coaxial cable is routed around the antenna assembly for configuring the coaxial cable as an additional ground resonator associated with the antenna assembly. The resulting antenna provides wide band performance between 700 MHz and 2700 MHz with improved efficiency compared with conventional antennas.

A protective case for an electronic device includes an outer shell and an inner cushion liner. The inner cushion liner is attached to an inner surface of the outer shell. The inner cushion layer is configured to receive the electronic device when the electronic device is installed in the protective case and is configured to contact and cover at least portions of the back and sides of the installed electronic device. The inner cushion liner comprises a first material for cushioning the installed electronic device as well as one or more regions of a second material configured to be in proximity to one or more antennas or antenna regions of the installed electronic device, respectively. The second material has a lower dielectric constant than the first material in at least a preferred frequency range of the electronic device.

An antenna has an exciting element disposed above a ground plane of an electronic device. Power fed to the exciting element excites the ground plane to generate radiation. In this way, radiation capability of the ground plane is not affected by clearance between a display screen and the ground plane, and the antenna is applicable to an electronic device with limited antenna space. In addition, the ground plane serves as a radiation aperture of the electronic device.

A protective cover configured for use with an electronic device having antenna regions. The protective cover comprises a protective shell configured to receive the electronic device when the electronic device is installed in the protective cover. The protective shell is configured to contact and cover at least portions of the back and sides of the electronic device when the electronic device is installed in the protective shell. The protective shell includes a first material and a second material where the second material has a dielectric constant that is different than a dielectric constant of the first material in at least one operating frequency range of the electronic device. The second material is present in regions of the protective shell that are in proximity to the antenna regions of the installed electronic device.

An antenna module, including a first antenna, a second antenna, a first ground, a third antenna, and a second ground, is provided. The first ground is located between the first antenna and the second antenna and is connected to the first antenna and the second antenna. The first ground has a first slot near the first antenna. The second antenna is located between the first antenna and the third antenna. An extension direction of the first antenna is not parallel to an extension direction of the second antenna. The extension direction of the second antenna is not parallel to an extension direction of the third antenna. The second ground is located between the second antenna and the third antenna and is connected to the third antenna. The second ground is separated from the first ground and the second antenna, and has a second slot.

An electronic device may include a housing and four antennas at respective corners of the housing. Cellular telephone transceiver circuitry may concurrently convey signals at one or more of the same frequencies over one or more of the four antennas using a multiple-input multiple-output (MIMO) scheme. In order to isolate adjacent antennas, dielectric-filled openings may be formed in conductive walls of the housing to divide the walls into segments that are used to form resonating element arms for the antennas. If desired, first and second antennas may include resonating element arms formed from a wall without any gaps. The first and second antennas may include adjacent return paths. A magnetic field associated with currents for the first antenna may cancel out with a magnetic field associated with currents for the second antenna at the adjacent return paths, thereby serving to electromagnetically isolate the first and second antennas.

A Phone-as-a-Key (PaaK) system uses a handheld mobile device (e.g., a smartphone) to act as a remote-control system for a vehicle. The vehicle has a wireless receiver adapted to receive and relay a user message to a vehicle electronic controller. The handheld mobile device comprises a wireless transmitter with an antenna mounted at a predetermined antenna location in the mobile device, an input element activated manually by a user to initiate the user message to control the vehicle electronic controller, and a display panel. A processor in the mobile device is configured to display a help screen on the display panel informing a user of a handholding grip adapted to avoid a blocking of the predetermined antenna location.

A communication device includes a first antenna and a second antenna that perform wireless communication in frequency bands that at least partly overlap each other, in which each of the first antenna and the second antenna includes a body part that resonates in a frequency band that is a target of the wireless communication with the each of the first antenna and the second antenna, and a branch part that branches from the body part. Each of the ranch part of the first antenna and the branch part of the second antenna includes a coupling part, the coupling part in the first antenna and the coupling part in the second antenna being disposed with an interval left to cause capacitive coupling.