Abstract: An electronic device includes an antenna unit having an antenna body having a feed point and a ground point between a first end and a second end. The antenna body has an operating band with a resonance of a first wavelength. An electrical length of the antenna body from the feed point to the ground point is greater than or equal to ¼ and less than ½ of the first wavelength. An electrical length from the first end to the feed point is greater than or equal to ? and less than or equal to ¼ of the first wavelength. An electrical length from the second end to the ground point is greater than or equal to ? and less than or equal to ¼ of the first wavelength. The antenna body is adapted to operate in a slot mode and in a wire mode.

Abstract: An electronic system having a mounting substrate with a plurality of layers. The mounting substrate includes a plurality of layers having pad structures each configured with a pad within an anti-pad opening. The pad structures are connected with via. The pad structures are configured to reduce the impedance of the via by altering the shape, size, and position of the pads and the anti-pad openings. The pads of the pad structures are configured as functional and non-functional pads based on the impedance targets for the vias.

Abstract: An electronic device includes a housing and a display screen that enclose an internal space. The housing includes a first conducting layer, and the display screen includes a second conducting layer. The first conducting layer and the second conducting layer are layered, and a conducting connection member disposed inside the electronic device is electrically connected between the first conducting layer and the second conducting layer. The first conducting layer, the conducting connection member, and the second conducting layer jointly enclose a cavity with a slot, forming a cavity-backed slot antenna.

Abstract: Provided is a damping hinge for controlled closing of a door or gate. The damping hinge includes a first clamp plate configured to be mounted to a fixed supporting panel; a second clamp plate configured to be mounted to a panel of the door or gate, wherein the second clamp plate is connected with the first clamp plate for relative rotation about a hinge axis; and a damping mechanism arranged on one of the first clamp plate and the second clamp plate and including a damper arranged substantially parallel to the hinge axis and configured to retard or control relative rotation of the second clamp plate towards the first clamp plate during closing of the hinge. The damping mechanism may be arranged such that the damping mechanism is located outside of a plane of the respective panel and adjacent or next to an outer or facing surface of that panel.

Abstract: An electronic device includes a radiator, a feed point, and a ground point. The plurality of radiators include a first radiator, a second radiator, and a third radiator. A first end of the first radiator and a first end of the second radiator are opposite to each other, and form a first gap. A second end of the first radiator and a first end of the third radiator are opposite to each other, and form a second gap. The feed point and the ground point are disposed on the first radiator. The ground point is disposed in a central region of the plurality of radiators or the first radiator, and the feed point is disposed between the central region and the first end of the first radiator. Gaps are formed between a plurality of radiators, so that a broadband antenna can be implemented.

Abstract: A method for traceability calibration of calibration device of rock chiseling specific power tester includes static calibration and dynamic calibration. Static calibration includes: placing impact indicator sensor of calibration device on static calibration stage; installing standard weight holder on adapter head of impact indicator sensor; adding a standard weight to standard weight holder several times; and calculating static coefficient k. Dynamic calibration includes: placing impact indicator sensor on dynamic calibration stage; resetting dynamic calibration coefficients a and b of calibration device; recording standard impact energy W0 of dynamic standard hammer and measured indication value W of impact indicator sensor to obtain standard deviation S=W?W0; and calculating dynamic coefficients a and b. Rock chiseling specific power magnitude is effectively traced to equal mass standard of standard weights. A new traceability method and system for specific power magnitude is constructed.

Abstract: This application provides an antenna having an L-shaped antenna body. The antenna body comprises a first end, a second end, and a feed point, a physical length between the feed point and the first end is greater than a physical length between the feed point and the second end, the antenna body generates resonance of a first wavelength between the feed point and the first end, and the antenna body generates resonance of a second wavelength between the first end and the second end, wherein the first wavelength is greater than the second wavelength. The antenna can have relatively good radiation performance regardless of whether the electronic device is in free space (FS) or in a handheld state.

Abstract: An electronic device has a radiator including a first end, a second end, a ground point, a first connection point, and a second connection point. The ground point is disposed in a central area of the radiator. A length of the radiator is greater than three-quarters of a first wavelength which is a medium wavelength of a first resonance generated by the radiator. A first inductor is electrically connected between the first connection point and the ground plane, and a second inductor is electrically connected between the second connection point and the ground plane, inductance values of the inductors are less than or equal to a first threshold. A distance between the first connection point and the first end is less than a quarter of the first wavelength, and the second connection point is located between the first connection point and the second end.

Abstract: This application provides a multi-band antenna. The antenna includes a feeder and a radiating element connected to the feeder, and further includes: a first notch structure, where the first notch structure is located on a side of the radiating element and is coupled to the radiating element; and a second notch structure, where the second notch structure is located on a far side of the first notch structure from the radiating element, and a far end of the second notch structure from the radiating element is grounded. The first notch structure may be selectively connected to the ground or to the second notch structure.

Abstract: In accordance with an embodiment, an antenna includes at least two radiators. The at least two radiators include a first radiator and a second radiator that are spaced apart in parallel, and a first end of the first radiator is disposed closer to a first end of the second radiator than a second end of the first radiator. Both the first radiator and the second radiator are connected to a feed point.

Abstract: Provided is a damping hinge for controlled closing of a door or gate. The damping hinge includes a first clamp plate configured to be mounted to a fixed supporting panel; a second clamp plate configured to be mounted to a panel of the door or gate, wherein the second clamp plate is connected with the first clamp plate for relative rotation about a hinge axis; and a damping mechanism arranged on at least one of the first clamp plate and the second clamp plate including a damper arranged substantially parallel to the hinge axis and configured to impact relative rotation of the second clamp plate towards the first clamp plate during closing of the hinge. The damping mechanism may be arranged such that the damping mechanism may be located outside of a plane of the respective panel and adjacent or next to an outer or facing surface of that panel.

Abstract: A foldable electronic device includes a first device body, a second device body, an earpiece, an antenna, and a first switch control circuit. The antenna includes a main radiator and a first parasitic radiator. The main radiator is disposed on the first device body, and the first parasitic radiator and the earpiece are disposed on the second device body. When the foldable electronic device is in a folded state, the main radiator is disposed relative to the first parasitic radiator at a first interval and is coupled to the first parasitic radiator through the first interval. The first switch control circuit includes a first switch component and a plurality of different first matching branches disposed in parallel connection. One end of the first switch control circuit is connected to a ground of the second device body, and the other end is connected to the first parasitic radiator.

Abstract: In some embodiments, an antenna system includes a first antenna and a second antenna. The first and second antenna include a shared first radiator and an additional radiator. Two ends of the first radiator are connected to a ground, each radiator has a first end farther from a first end of the other radiator, and the first end of the second radiator and the first end of the third radiator are separately connected to the first radiator. The second end of the second radiator is disposed opposite a gap to the second end of the third radiator. The first antenna is through a first feeding connection on the second radiator, and the second antenna is through a second feeding connection on the third radiator.

Abstract: An antenna structure includes a first radiator and a second radiator, and a first open end of the first radiator is opposite to and spaced from a second open end of the second radiator. A decoupling circuit is connected between the first open end and the second open end. The first radiator includes a first section and a second section that intersect, and the first section and the second section are respectively located on two adjacent sides of a ground.

Abstract: An antenna system having a first antenna that includes a metal middle frame, a first metal frame, and a second metal frame. The middle frame is a ground of the first antenna. The first and second metal frames are side edges of the mobile terminal. A first gap is formed by the first, the second metal frames, and the middle frame. A first end of the first metal frame is connected to the middle frame by a first connection point, and a second end of the first metal frame is connected to a first end of the second metal frame. A first slit is located between a second end of the second metal frame and the middle frame. The first feed point on the first metal frame is connected to the middle frame. A length of the first metal frame is greater than a length of the second metal frame.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a request to a network entity to establish a voice communication session with another UE that may be subscribed to a video service. The UE may transmit an indication of a video streaming parameter for the video service for streaming one-way video transmissions from the network entity to the UE for display during establishment of the voice communication session. The UE may transmit an indication of an updated video streaming parameter to the network entity to reduce the video quality for the video service. The network entity may reduce the video streaming quality for the one or more one-way video transmissions to the UE based on the updated video streaming parameter.

Abstract: A multi-antenna system and an electronic device comprising the same. An intelligent multi-antenna solution in which antennas are laid out at the top, the side, and the bottom of an electronic device is used, so that three antenna groups including a top antenna group, a middle antenna group, and a bottom antenna group are respectively formed, and antenna performance in a plurality of scenarios such as a free-space scenario, a portrait-mode holding scenario, and a landscape-mode holding scenario is considered, to improve antenna radiation efficiency.

Abstract: An antenna includes a patch radiator, a feed point, a first ground point, and a second ground point. The patch radiator has a first side edge and an intersecting second side edge, and a first coupling contact and a second coupling contact. The patch radiator is coupled to the first ground point and the second ground point through the first coupling contact and the second coupling contact, and is biased coupled to the feed point. A distance between the first coupling contact and the first side edge, a distance between the first coupling contact and the second side edge, a distance between the second coupling contact and the first side edge, and a distance between the second coupling contact and the second side edge are all greater than or equal to 0.05?, where ? is an operating wavelength of the antenna in an operating frequency band range of the antenna.

Abstract: The present invention provides a mixed injection fluid and a corresponding method for enhancing CO2 sequestration and oil recovery, which is a method of the geothermal driven CO2 catalytic reduction for enhancing CO2 sequestration and oil recovery. In the present invention, a technical solution of the liquid nitrogen fracturing, an injection fluid injection, and the catalysis transportation and storage were adopted, which makes full use of the thermal energy of deep geothermal reservoir in combination with nano-Cu-based catalysts to activate the hydrothermal cracking reaction of crude oil and CO2 thermal reduction reaction, so to simultaneously enhance crude oil recovery and CO2 sequestration, fundamentally solving the existing problems of CO2-EOR technologies. Moreover, CO2 thermal catalytic reduction products can also work as a surfactant to accelerate the desorption crude oil from the rock surface and decrease the interfacial tension, and finally EOR.

Abstract: A foldable electronic device having a primary screen portion with a primary-screen antenna, and a secondary screen portion with a secondary-screen antenna. Positions of the primary-screen antenna and the secondary-screen antenna overlap when the electronic device is folded. The primary-screen antenna and the secondary-screen antenna may excite two antenna patterns of high isolation. In this way, even if the primary-screen antenna and the secondary-screen antenna operate on a same frequency band and overlap, good isolation performance can also be obtained.