Abstract: A calibration system for a through-casing electromagnetic instrument, includes a casing; multiple coils wound outside the casing for simulating the resistivities of different depth formations respectively when one or more current or voltage signals are applied; a transmitter connected to the multiple coils and configured to provide the voltage or current signal to each of the multiple coils based on a control signal; and a control system in communication with the transmitter. The control system is configured to: generate the control signal based on a resistivity corresponding to the formation and a radial detection range to be simulated; and send the control signal to the transmitter so that the transmitter generates the voltage or current signal based on the control signal. A method for calibrating a through-casing electromagnetic instrument, a control system, a machine-readable storage medium, and a computer program product are also provided.

Abstract: This application relates to the field of terminal technologies and the field of antenna technologies, and provides an antenna structure and an electronic device. The antenna structure includes an antenna body and a dielectric layer. The antenna body is attached to the dielectric layer. The antenna body is shaped like a ring. The antenna body includes a feed point, a gap, a first ground point, and a second ground point. The gap is located between the feed point and the second ground point, and the gap extends toward the first ground point. Through the solution, in a scenario where a border frame area of the electronic device is covered with metal, an antenna that supports a plurality of bands may still be designed through a camera decoration member area of the electronic device, which has relatively high efficiency and broadband radiation and high practicability.

Abstract: This application provides a resonant cavity antenna and an electronic device, and relates to the communications field. The resonant cavity antenna includes an antenna cavity, a first gap, and a feeding part. At least one edge of a first surface of the antenna cavity is parallel to a long edge of a display of an electronic device, at least one edge of a second surface of the antenna cavity is parallel to the long edge of the display, a plane on which the first surface is located intersects a plane on which the second surface is located. The first gap is disposed on the first surface and/or the second surface, and at least a part of the first gap extends in a direction of the long edge of the display. The feeding part is located inside the antenna cavity, and in contact with none of surfaces of the antenna cavity.

Abstract: An antenna combination system and a terminal device. The antenna combination system includes a first antenna and a second antenna having a distance less than a first preset threshold. The first antenna includes a first radiation branch and a first feed point, a feed point of the second antenna is arranged on a side away from the first feed point, and a side of the first radiation branch away from the first feed point is grounded. The first feed point is arranged on a side close to the second antenna, and the length of the first radiation branch is an odd multiple of (½)?. In a case that the second antenna transmits a signal in a first frequency band, a first signal and a second signal that cancel each other are coupled from the second antenna to the first antenna.

Abstract: A Wi-Fi and Bluetooth combined antenna apparatus and a configuration method therefor, and a terminal device. The Wi-Fi and Bluetooth combined antenna apparatus includes a Wi-Fi antenna, a ground plate, a perturbation unit, and a Bluetooth antenna. The Wi-Fi antenna generates a ground plate current on the ground plate; the perturbation unit is configured to generate a reverse current after being excited by the ground plate current, and a current zero point area is formed on the ground plate after the reverse current is superimposed with the ground plate current; and the Bluetooth antenna is disposed at a position of an edge of the ground plate corresponding to the current zero point area. In this way, isolation between the Bluetooth antenna and the Wi-Fi antenna is better improved.

Abstract: Embodiments of this application are applicable to the field of antenna technologies, and provide an antenna and an electronic device. The antenna includes a first resonant cavity and a feed. The first resonant cavity includes a first slot and a second slot, the first slot is provided on a first plane in the first resonant cavity; the second slot is provided on a second plane that is in the first resonant cavity and that is adjacent to the first plane, and the first plane and the second plane are perpendicular to a plane on which the metal backplane is located; and the feed is disposed in the first resonant cavity for feeding the antenna. By using the antenna provided in the embodiments of this application, signal coverage in front of a screen of the electronic device can be increased.

Abstract: This application provides an antenna system related to the field of terminal technologies. The system includes: a radio frequency chip, a controller, and a plurality of antennas, where the radio frequency chip is connected to the plurality of antennas: a first antenna, a second antenna, . . . , and an Nth antenna by a power amplifier and switches, where the first antenna is a to-be-improved antenna, an ith antenna is an auxiliary antenna; and the controller determines that a frequency band in which an antenna of the wireless communication device operates belongs to a preset to-be-improved frequency band of the first antenna; determines whether the ith antenna operates; and sets a load status of a radio frequency input end of the ith antenna and adjusts a switch or Tuner state on the ith antenna side when the ith antenna does not operate.

Abstract: Embodiments of this application disclose a terminal antenna, and relate to the field of antenna technologies. The terminal antenna includes a first radiator and a second radiator, the first radiator is in a ring structure, the second radiator is disposed inside the first radiator, the first radiator and the second radiator are not directly connected, and the first radiator and the second radiator are located on a same plane. The terminal antenna further includes at least two inductor components, one end of the inductor component is connected to the first radiator, and the other end of the inductor component is connected to the second radiator. A feed is further disposed on the terminal antenna, one end of the feed is disposed on the first radiator, and the other end of the feed is disposed on the second radiator.

Abstract: A MIMO antenna system related to the field of antenna technologies. A specific solution includes: The MIMO antenna system includes a first antenna and a second antenna, the first antenna includes a first radiator and a second radiator, the first radiator is in a ring structure, the second radiator is disposed inside the first radiator. A first feed is further disposed on the first antenna, and one end of the first feed is disposed on the first radiator and the second radiator. The second antenna includes a third radiator, the third radiator is in a ring structure, a penetration slot is disposed on the third radiator. A second feed is further disposed on the third radiator. The first antenna is disposed inside the second antenna and they are not connected to each other.

Abstract: A wireless router and a control method thereof, to improve application universality of the wireless router. The wireless router includes an omnidirectional antenna, a directional antenna, and a driving apparatus. The driving apparatus is connected to the directional antenna, the driving apparatus is configured to drive the directional antenna to rotate, so that a beam direction of the directional antenna coincides with a direction of a target beam in a beam lookup table, and the target beam is capable of covering a target device. The beam lookup table includes a set formed by beams when the directional antenna rotates to a plurality of different orientations under driving by the driving apparatus.

Abstract: Embodiments of this application relate to the field of antennas, and provide a terminal antenna. The terminal antenna includes n radiators. The n radiators include a first radiator, a second radiator, and a third radiator. Lengths of the first radiator, the second radiator, and the third radiator form a descending arithmetic progression. The first radiator, the second radiator, and the third radiator are arranged in sequence to form two gaps. A coupling capacitance formed by the first radiator and the second radiator through the corresponding gap is greater than a coupling capacitance formed by the second radiator and the third radiator through the corresponding gap. The first radiator, the second radiator, and the third radiator are any three of the n radiators distributed in sequence.

Abstract: An antenna module includes a metal plate, a metal body and an excitation source. The metal body is provided on the metal plate, and includes a first slot and a second slot arranged crosswise and at a set angle. Each of the first slot and the second slot includes a transverse opening penetrating through the metal body along a thickness direction of the metal plate and a longitudinal opening penetrating through the metal body along a plane direction of the metal plate, and a length of the transverse opening and a length of the longitudinal opening are in a set ratio. The excitation source is configured to excite the first slot and the second slot to radiate a circularly polarized wave.

Abstract: An antenna includes a first radiation structure having a first radiator, and a second radiation structure having a second radiator. A first end of the first radiator and a first end of the second radiator form a first gap. A second end of the first radiator is free, and a second end of the second radiator is grounded. A feed point of the antenna is coupled to the first radiator, and the first radiator is divided into a first portion and a second portion that are delimited by the feed point. In a case that the antenna is in operation, the first portion of the first radiator and the second radiator work together in a first frequency band and a second frequency band, and a frequency of the first frequency band is less than a frequency of the second frequency band.

Abstract: Embodiments of this application provide a foldable electronic device including an antenna. The foldable electronic device include a first body, a second body, and a rotating shaft connected to the first body and the second body. The first body and the second body are rotatable around the rotating shaft. As the first body and the second body rotate, a form of the foldable electronic device may be switched between a folded state and an unfolded state. The antenna may be a slot antenna formed by hollowing out a metal housing of the first body or a metal housing of the second body. The slot antenna may include a first branch and a second branch, where the first branch and the second branch may be perpendicular to each other. This can reduce the antenna directivity coefficient, improve an antenna radiation pattern, and improve a signal coverage capability of the electronic device.

Abstract: This application provides an antenna system and a terminal device. a first feed point is disposed on the first radiation branch, and the first feed point is located at an end of the first radiation branch away from the second radiation branch; a second feed point is disposed on the second radiation branch, and the second feed point is located at an end of the second radiation branch away from the first radiation branch; the first ground return point is located at an electrical connection between the first radiation branch and the second radiation branch, and the first ground return point is located between the first feed point and the second feed point; and a second ground return point is disposed on the third radiation branch, and the second ground return point is located at an end of the third radiation branch away from the first gap.

Abstract: Embodiments of this application relate to the field of antennas, and provide a terminal antenna. The terminal antenna includes n radiators. The n radiators include a first radiator, a second radiator, and a third radiator. Lengths of the first radiator, the second radiator, and the third radiator form a descending arithmetic progression. The first radiator, the second radiator, and the third radiator are arranged in sequence to form two gaps. A coupling capacitance formed by the first radiator and the second radiator through the corresponding gap is greater than a coupling capacitance formed by the second radiator and the third radiator through the corresponding gap. The first radiator, the second radiator, and the third radiator are any three of the n radiators distributed in sequence.

Abstract: Embodiments of this application disclose an antenna power control method and an electronic device. The specific solution is: obtaining, by a first sensor, statuses of at least two detection channels, where each of the detection channels corresponds to one status, the status is any one of a first state and a second state, the first state indicates that a value of capacitance between an antenna corresponding to the detection channel and a human body is greater than a first threshold, and the second state indicates that the value of the capacitance between the antenna corresponding to the detection channel and the human body is less than the first threshold; determining, by a first driving module, a first range value based on the statuses of the at least two detection channels; and controlling, by the processor, transmit power of the at least two antennas based on the first range value.

Abstract: This application provides an antenna decoupling structure, a MIMO antenna, and a terminal. The antenna decoupling structure includes a grounding stub and a capacitor structure, where a first end of the grounding stub is connected to an antenna floor, to form an equivalent inductor; and a first end of the capacitor structure is connected to the antenna floor, and a second end of the capacitor structure is connected to a second end of the grounding stub, so that the equivalent inductor and the capacitor structure form an LC resonant structure, where a parameter corresponding to the LC resonant structure meets a decoupling requirement for at least one target decoupling frequency band. Because the resonant frequency depends on the inductance and the capacitance that correspond to the LC resonant structure, antenna miniaturization can be realized by reducing a size of each portion of the decoupling structure.

Abstract: A terminal antenna and an electronic device, which relate to the field of antenna technologies. By adding a choke structure, optimization of a maximum gain of an original antenna is implemented, and in addition. A specific solution is as follows: the terminal antenna includes a first radiator and a second radiator. a first end of the first radiator is provided with a feed, and a second end of the first radiator is connected to a reference ground; the first radiator is provided with a gap that runs through the first radiator, the gap is in an interdigitated structure, and there are at least two gaps; and the second radiator is arranged on a side of the first radiator, the second radiator is L-shaped, the second radiator and the reference ground enclose an inverted L-shaped first gap.

Abstract: A MIMO antenna system related to the field of antenna technologies. A specific solution includes: The MIMO antenna system includes a first antenna and a second antenna, the first antenna includes a first radiator and a second radiator, the first radiator is in a ring structure, the second radiator is disposed inside the first radiator. A first feed is further disposed on the first antenna, and one end of the first feed is disposed on the first radiator and the second radiator. The second antenna includes a third radiator, the third radiator is in a ring structure, a penetration slot is disposed on the third radiator. A second feed is further disposed on the third radiator. The first antenna is disposed inside the second antenna and they are not connected to each other.