A method for manufacturing a rear cover is provided. A housing is provided. The housing has a metal layer and a plastic layer. The metal layer has a first surface and a second surface. The plastic layer is formed on the first surface. A slot is defined in the metal layer. The slot passes through the first surface and the second surface of the metal layer. An unshielded portion is formed in the slot. A rear cover and an electronic device having the rear cover are also provided.

A method and apparatus for using Euclidean modulation in an antenna are disclosed. In one embodiment, a method for controlling an antenna comprises mapping a desired modulation to achievable modulation states, mapping modulation values associated with the achievable modulation states to one or more control parameters, and controlling radio frequency (RF) radiating antenna elements using the one or more control parameters to perform beam forming.

A holographic antenna includes a transmission line and a plurality of interdigital capacitor (IDC) slots respectively formed along the transmission line. The holographic antenna also includes an active tuning device connected to each IDC slot from the plurality of IDC slots. Each active tuning device is configured to provide a holographic pattern on the plurality of IDC slots in response to the holographic antenna transmitting or receiving an electromagnetic signal. The holographic pattern is controllable for scanning an electromagnetic beam by the holographic antenna. The holographic antenna also includes a biasing source coupled to each active tuning device and configured to control its respective operation.

A method and apparatus for DC offset correction in an antenna aperture are described. In one embodiment, the antenna comprises: an array of antenna elements having liquid crystal (LC); drive circuitry coupled to the array and having a plurality of drivers, each driver of the plurality of drivers coupled to an antenna element of the array and operable to apply a drive voltage to the antenna element; and voltage correction logic coupled to the drive circuitry adjust drive voltages to compensate for an offset between a first magnitude of a first voltage applied to the LC of each antenna element during a first interval of drive polarity and a second magnitude of a second voltage applied to the LC of said each antenna element during a second interval of drive polarity opposite the drive polarity of the first interval.

In some embodiments, a printed circuit board is disclosed. The printed circuit board includes a substrate, a conductive plane, and at least one switch. The conductive plane includes an edge enabled void construction (EEVC) along a geometric perimeter of the conductive plane, the EEVC having an EEVC void that defines an EEVC perimeter that extends into the conductive plane.

An electronic device according to various embodiments of the present disclosure may comprise: a first housing; a second housing configured to accommodate at least a portion of the first housing and to guide a sliding motion of the first housing; a flexible display including a first display area connected to the first housing, and a second display area extending from the first display area and capable of bending or rolling; a circuit board disposed in the first housing and movable in response to the sliding motion of the first housing; an antenna structure formed on an outer surface of the second structure, and including a first part and a second part that are symmetrical about a first axis perpendicular to the sliding motion direction; and a feeding structure disposed on the circuit board configured to feed power to the antenna structure. The feeding structure is electrically connected to a first point of the first part in a state in which the flexible display slides in, and the feeding structure is electrically connected to a second point of the second part in a state in which the flexible display slides out. The first point and the second point may be spaced apart from each other by the same distance as the first axis.

The present disclosure relates to the technical field of electronic devices, and provides an apparatus with a slot antenna, including: a radiation slot formed in the apparatus; a feeding terminal having one end connected to a feeding point of the slot antenna across the radiation slot, and the other end electrically connected to a radio-frequency circuit of the apparatus; a first inductor having one end connected to a grounding point of the slot antenna across the radiation slot, and the other end electrically connected to a grounding unit of the apparatus; and a first capacitor provided in the radiation slot and having two electrodes respectively connected to both ends of the radiation slot in a width direction, where the first capacitor is located between the feeding terminal and the first inductor in a length direction of the radiation slot.

A wireless communication device includes a metallic chassis, a slot extending through a sidewall of the metallic chassis, and a slot antenna secured to an inner surface of the metallic chassis and adjacent the slot. The slot antenna is integrated into the metallic chassis, giving the appearance and function of an internal antenna used with wireless communication devices having non-metallic chassis.

A method and apparatus for electrical addressing for an antenna (e.g., a metamaterial radio-frequency (RF) antenna are described. In one embodiment antenna comprising: a plurality of radio-frequency (RF) radiating antenna elements located in a plurality of rings; and matrix drive circuitry coupled to the plurality of RF radiating antenna elements to drive the antenna elements, wherein the matrix drive circuitry to uniquely address each of the antenna elements using a matrix of a plurality of rows and a plurality of columns with a non-grid-based addressing structure.

The disclosed mobile electronic device may include a display, an enclosure supporting the display and comprising a conductive portion including at least one inward protrusion, and a ground plane positioned within the enclosure and comprising at least one channel, wherein the at least one inward protrusion extends within the at least one channel of the ground plane and a gap defined between the conductive portion of the enclosure and the ground plane forms a slot antenna that is configured to radiate electromagnetic signals through a portion of the display. Various other related methods and systems are also disclosed.