A cavity antenna structure, a notebook computer and an electronic device

Abstract

This application provides a cavity antenna structure, a laptop computer, and an electronic device, relating to the field of antenna technology. The cavity antenna structure includes a conductive housing; at least a portion of the display element forming a radiating slot; a flexible conductor disposed between and electrically connected to the conductive housing and the display element, the flexible conductor, the display element, and the conductive housing enclosing a cavity, with at least a portion of the radiating slot positioned opposite the cavity; a grounding component located between the conductive housing and the display element, and on the outside of the cavity; and a feeding component used to couple or directly feed radio frequency signals into the cavity. This application utilizes an existing display element, eliminating the need for slots in the device body to form the antenna cavity structure, thus improving the appearance and structural integrity.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and in particular to a cavity antenna structure, a laptop computer, and electronic devices. Background Technology

[0002] With the development of thinner and lighter, more integrated electronic devices, such as laptops, in order to meet the requirements of multiple wireless communication standards such as Wi-Fi 6 / 6E and Bluetooth, their antenna systems need to cover a wider frequency band and maintain efficient radiation within a limited space.

[0003] In related technologies, the industry uses slots in the body of electronic devices, partial plastic filling, or slot antennas, such as slots in the metal casing of laptops, to form slot antennas.

[0004] However, creating physical gaps in the metal casing can damage the shape of electronic devices, affecting their appearance and structural integrity. Summary of the Invention

[0005] This application provides a cavity antenna structure, a laptop computer, and an electronic device that utilizes existing display components, eliminating the need to create an antenna cavity structure by cutting slots in the device body, and placing the cavity antenna structure on top of the display component to avoid interference.

[0006] To achieve the above objectives, the technical solution of this application is as follows: In a first aspect, this application provides a cavity antenna structure, comprising: a conductive housing; a display element, at least a portion of which forms a radiating slot; a flexible conductor disposed between and electrically connected to the conductive housing and the display element, the flexible conductor, the display element, and the conductive housing enclosing a cavity, at least a portion of which is disposed opposite to the cavity; a grounding component located between the conductive housing and the display element, and located outside the cavity; and a feeding component used to couple or directly feed radio frequency signals into the cavity.

[0007] In one possible implementation, the flexible conductor has a first side and a second side disposed opposite to each other. The first side elastically abuts against the conductive housing, and the second side elastically abuts against the display element. At least a portion of the flexible conductor is bent so that the flexible conductor, the conductive housing, and the display element together enclose a cavity having at least one open side, and the open side is disposed toward the outer edge of the conductive housing.

[0008] In one possible implementation, the flexible conductor includes a first body and a second body connected in sequence, the extension direction of the first body intersects the extension direction of the second body, both the first body and the second body have a first surface and a second surface, and the first body, the second body, the conductive housing and the display element together enclose a cavity with two adjacent open sides.

[0009] In one possible implementation, the flexible conductor further includes a third body connected to the second body and disposed opposite to the first body. The third body has a first surface and a second surface. The first body, the second body, the third body, the conductive housing, and the display element together enclose a cavity having an open side.

[0010] In one possible implementation, the grounding assembly includes at least two grounding elements, and the cavity has intersecting first and second outer side walls, with the at least two grounding elements respectively corresponding to the first and second outer side walls.

[0011] In one possible implementation, the display includes a glass cover and a back plate, with the glass cover covering the back plate and the periphery of the glass cover extending beyond the periphery of the back plate. The glass cover located outside the periphery of the back plate forms a shielding area, and part of the shielding area is used to form a radiation slit.

[0012] In one possible implementation, the power supply assembly includes a power supply adapter, a power supply wire, and a first conductive elastomer; the power supply adapter is provided with a radio frequency terminal and a ground layer, the radio frequency terminal is connected to the first conductive elastomer through the power supply wire, the first conductive elastomer is connected to the display element for power supply to the backplate of the display element, and the ground layer is used to connect to the conductive housing through a ground hole.

[0013] In one possible implementation, the power supply assembly includes a power supply adapter, an antenna trace, a conductive element, and a second conductive elastomer. The antenna trace is disposed on the power supply adapter. A first end of the conductive element is connected to the antenna trace, and a second end of the conductive element extends to the back panel of the display element. The second end of the conductive element is connected to one end of the second conductive elastomer, and the other end of the second conductive elastomer is connected to a conductive housing.

[0014] Secondly, this application also provides a laptop computer, including a display screen, a casing, and a cavity antenna structure as described in any of the first aspects above disposed within the casing; wherein the display element of the cavity antenna structure is at least a partially conductive structure of the display screen, and the conductive housing of the cavity antenna structure is at least a partially metal housing of the casing.

[0015] Thirdly, this application also provides an electronic device, including a cavity antenna structure as described in any of the first aspects above or a laptop computer as described in the second aspect above.

[0016] This application provides a cavity antenna structure, a laptop computer, and an electronic device. In this application, a radiating slot is formed by at least a portion of the display component, eliminating the need for additional slotting on the conductive housing and thus avoiding damage to the electronic device's shape. Since the display component is brittle, direct rigid contact with the conductive housing can easily lead to stress concentration and white spots. Therefore, by placing a flexible conductor between the conductive housing and the display component and electrically connecting them, production and assembly errors are compensated for, the continuity of the cavity's electrical boundaries is ensured, and the elastic deformation of the flexible conductor buffers pressure, thereby protecting the display component and preventing white spots. A grounding component is added to the outside of the cavity to ensure a stable grounding environment and reduce clutter. A feeding component couples or directly feeds the radio frequency signal into the cavity, exciting the cavity to generate the desired resonant mode, thereby radiating electromagnetic energy outward through the radiating slot, achieving antenna performance. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0018] Figure 1 This is a schematic diagram of a cavity antenna structure on a laptop computer, provided as an embodiment of this application.

[0019] Figure 2 A schematic diagram of another cavity antenna structure provided in this application embodiment on a laptop computer;

[0020] Figure 3 This is a schematic diagram of the structure of the cavity antenna structure provided in this application, in which the feeding component realizes direct feeding of radio frequency signals;

[0021] Figure 4 for Figure 3 Side view of the central feeder assembly;

[0022] Figure 5 This is a schematic diagram of the structure of the cavity antenna structure provided in this application, which realizes the radio frequency signal coupling and feeding.

[0023] Figure 6 This is a schematic diagram of the structure of the cavity antenna structure provided in this application, showing how the feeding component achieves direct feeding;

[0024] Figure 7 Simulation diagram of the near-field electric field distribution of the cavity antenna structure provided in the embodiments of this application at 2.45 GHz;

[0025] Figure 8 Simulation diagram of the near-field electric field distribution of the cavity antenna structure provided in the embodiments of this application at 5.28 GHz;

[0026] Figure 9 Simulation diagram of the far-field radiation direction of the cavity antenna structure provided in the embodiments of this application at 2.45 GHz;

[0027] Figure 10 Simulation diagram of the far-field radiation direction of the cavity antenna structure provided in the embodiments of this application at 5.28 GHz.

[0028] Explanation of reference numerals in the attached figures:

[0029] 10- Laptops;

[0030] 20-Electronic devices;

[0031] 100 - Conductive housing; 101 - Cavity; 102 - First outer side wall; 103 - Second outer side wall;

[0032] 200 - Display component; 201 - Radiation gap; 210 - Glass cover; 220 - Back panel;

[0033] 300 - Flexible conductor; 310 - First conductor; 320 - Second conductor; 330 - Third conductor;

[0034] 400 - Grounding assembly; 410 - Grounding element;

[0035] 500 - Feeding assembly; 510 - Feeding adapter; 511 - RF terminal; 512 - Grounding layer; 513 - Ground hole; 520 - Feeding wire; 530 - First conductive elastomer; 540 - Antenna trace; 550 - Conductive component; 560 - Second conductive elastomer.

[0036] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0037] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended application.

[0038] It should be noted that in the description of the embodiments of this application, the terms "upper", "lower", "inner", "outer" and other terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and are not intended to indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this application.

[0039] Furthermore, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] The following explains the terms used in the embodiments of this application.

[0042] Cavity antenna: It utilizes the resonant characteristics of a metal cavity (closed / semi-closed) to radiate electromagnetic waves through a gap or opening. The resonant frequency of a cavity antenna is determined by the cavity size.

[0043] Microstrip lines: Transmission lines printed on a dielectric substrate, used for radio frequency signal transmission. They have a simple structure but low loss and can operate at higher frequencies.

[0044] Coupled feeding: The antenna structure is excited by electromagnetic field coupling (without direct physical contact), reducing the impact of the feed point on radiation. For example, coupled feeding patch antennas in millimeter-wave communication.

[0045] Direct feed: The radio frequency signal is directly connected to the antenna structure through a coaxial line or microstrip line, and the feed point needs to be precisely matched to the impedance.

[0046] LDS process: Laser Direct Forming technology, which selectively generates conductive paths on the surface of plastic to form a 3D antenna.

[0047] With the development of thinner and lighter, more integrated electronic devices, such as laptops, in order to meet the requirements of multiple wireless communication standards such as Wi-Fi 6 / 6E and Bluetooth, their antenna systems need to cover a wider frequency band and maintain efficient radiation within a limited space.

[0048] In related technologies, slot antennas are formed by slotting the metal casing of electronic devices.

[0049] Slotted antennas formed by cutting grooves on the bottom or sides of a metal fuselage and using the electromagnetic radiation characteristics of the slots to transmit signals can damage the structural integrity of the fuselage, affect its appearance and texture, and may reduce its structural strength.

[0050] Non-conductive plastic material is used to fill critical areas of the metal casing (such as the hinge or bottom) to form antenna radiation windows. However, this plastic filling weakens the visual uniformity of the all-metal appearance, and the dielectric properties of the plastic material may introduce additional signal loss. Using slot antennas, on the other hand, requires high-precision structural stacking, making production and manufacturing complex and difficult.

[0051] In addition, many related technologies rely on new structures or materials (such as scaffolds and LDS processes), which increases costs and complicates manufacturing processes, making it difficult to meet the market's demand for low costs.

[0052] In other ways, antennas are placed at the bottom of the electronic device's body, in the hinge area.

[0053] Antennas placed on the bottom of the device are easily interfered with by hand gripping, desktop obstruction, and internal heat dissipation modules.

[0054] In view of this, this application provides a cavity antenna structure, a laptop computer, and an electronic device. In this embodiment, a radiating slot is formed by at least a portion of the display component, eliminating the need for additional slotting on the conductive housing and thus avoiding damage to the shape of the electronic device. Since the display component is brittle, direct rigid contact with the conductive housing can easily lead to stress concentration and white spots. Therefore, by placing a flexible conductor between the conductive housing and the display component and electrically connecting them, production assembly errors are compensated for, the continuity of the cavity's electrical boundary is ensured, and the elastic deformation of the flexible conductor buffers pressure, thereby protecting the display component and preventing white spots. A grounding component is added to the outside of the cavity to ensure a stable grounding environment and reduce clutter. A feeding component couples or directly feeds the radio frequency signal into the cavity, exciting the cavity to generate the desired resonant mode, thereby radiating electromagnetic energy outward through the radiating slot to achieve antenna performance. Simultaneously, by arranging the cavity close to the top of the display component, away from the bottom of the device or the hinge area, interference from hand grip, desktop obstruction, and internal heat dissipation modules is reduced, ensuring stable antenna signal.

[0055] The following is in conjunction with the appendix Figures 1 to 10The present application will be described in detail with reference to specific embodiments.

[0056] This application does not limit the specific application scenarios of the cavity antenna structure. For example, it can be applied to portable devices with metal casings and displays, such as laptops 10, tablets, all-in-one computers, and foldable screen electronic devices 20.

[0057] Firstly, this application provides a cavity antenna structure, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, it includes: a conductive housing 100; a display element 200, at least a portion of which forms a radiating slit 201; a flexible conductor 300, disposed between the conductive housing 100 and the display element 200 and electrically connected to both, the flexible conductor 300, the display element 200, and the conductive housing 100 forming a cavity 101, at least a portion of which is disposed opposite to the cavity 101; a grounding assembly 400, located between the conductive housing 100 and the display element 200 and on the outside of the cavity 101; and a power supply assembly 500, used to couple or directly feed radio frequency signals into the cavity 101.

[0058] In this application embodiment, the specific type of conductive housing 100 is not limited. For example, conductive housing 100 can be part of the metal casing of electronic device 20, such as the metal casing of laptop 10, the metal back cover of tablet computer, or the metal frame of all-in-one computer.

[0059] The conductive housing 100 has an inner surface facing the display element 200 and an outer surface facing away from the display element 200. The inner surface is used to enclose one side forming the cavity 101. The outer surface of the conductive housing 100 faces the outside of the electronic device 20, and has an intact appearance.

[0060] The display element 200 includes a glass cover plate 210 and a back plate 220, with the back plate 220 located on the side of the glass cover plate 210 facing away from the display side. At least a portion of the display element 200 itself forms a radiating slit 201, which is located in the shielded area of ​​the display element 200, such as the black border area around the glass cover plate 210.

[0061] This application does not limit the specific type of the display element 200. For example, the display element 200 can be a liquid crystal display module, an organic light-emitting diode display module, or a miniature light-emitting diode display module. Of course, the display element 200 can refer to the entire display module, or it can refer to the display element 200 corresponding to the cavity 101, that is, the part corresponding to the projection of the cavity 101 on the display module.

[0062] The flexible conductor 300, the display element 200, and the conductive housing 100 together form a cavity 101. For example, the conductive housing 100 serves as the upper wall of the cavity 101, the back plate 220 of the display element 200 serves as the lower wall of the cavity 101, and the flexible conductor 300 serves as the side wall of the cavity 101.

[0063] The cavity 101 has at least one open side, i.e., the side that is not closed by the flexible conductor 300. For example, when the flexible conductor 300 is bent into an L-shape, the cavity 101 has two adjacent open sides; when the flexible conductor 300 is bent into a U-shape, the cavity 101 has one open side.

[0064] This application embodiment does not limit the position of the cavity 101. For example, the cavity 101 is located near the top, middle, or bottom of the display 200. When the cavity 101 is located near the top of the display 200, by arranging the cavity 101 near the top of the display 200 and keeping it away from the bottom of the device or the hinge area, interference from hand grip, desktop obstruction, and internal heat dissipation module can be reduced, ensuring stable antenna signal.

[0065] At least a portion of the radiation slit 201 is disposed opposite to the cavity 101. Specifically, the position of the radiation slit 201 on the display 200 corresponds to the position of the opening side of the cavity 101, so that electromagnetic energy radiated from the inside of the cavity 101 can pass through the radiation slit 201.

[0066] A grounding assembly 400 is located between the conductive housing 100 and the display element 200, and is situated on the outer side of the cavity 101. The grounding assembly 400 is also conductive and elastic. Exemplarily, the grounding assembly 400 can be a conductive foam strip, a conductive wire, or a metal spring. The grounding assembly 400 is arranged continuously or at intervals along the outer side wall of the cavity 101. A first surface of the grounding assembly 400 abuts against the inner surface of the conductive housing 100, and a second surface abuts against the back plate 220 of the display element 200.

[0067] The power supply assembly 500 is used to feed radio frequency (RF) signals into the cavity 101. The feeding method can be direct contact feeding or electromagnetic coupling feeding. The power supply assembly 500 includes a power supply transmission line (e.g., a coaxial cable or microstrip transmission line) and power supply contacts, which are disposed inside the cavity 101 or on its boundary. When an RF signal is injected into the cavity 101 through the power supply assembly 500, the cavity 101 resonates in a preset frequency band, and electromagnetic energy is radiated outward through the radiation slit 201.

[0068] In one possible implementation, the flexible conductor 300 has a first side and a second side disposed opposite to each other. The first side elastically abuts against the conductive housing 100, and the second side elastically abuts against the display element 200. At least a portion of the flexible conductor 300 is bent so that the flexible conductor 300, the conductive housing 100 and the display element 200 together enclose a cavity 101 having at least one open side, and the open side is disposed toward the outer edge of the conductive housing 100.

[0069] At least a portion of the flexible conductor 300 is bent, causing the flexible conductor 300 to have a non-linear shape in space. For example, the flexible conductor 300 can be bent in an L-shape, a U-shape, a V-shape, or a C-shape. The bending angle can be selected according to the required opening direction and number of openings of the cavity 101, for example, the bending angle is approximately 90 degrees.

[0070] The bent flexible conductor 300, the conductive housing 100, and the display element 200 together enclose a cavity 101 having at least one open side, with the open side facing the outer edge of the conductive housing 100. The outer edge of the conductive housing 100 refers to the side of the conductive housing 100 closest to the edge of the device. For example, when the conductive housing 100 is the metal back cover of the screen of a laptop computer 10, its outer edge is the top edge, left edge, or right edge of the screen.

[0071] For example, when the flexible conductor 300 is bent into an L-shape, the cavity 101 has two adjacent opening sides, such as a top opening and a left opening, which face the top outer edge and the left outer edge of the conductive housing 100, respectively. When the flexible conductor 300 is bent into a U-shape, the cavity 101 has one opening side, such as a top opening, which faces the top outer edge of the conductive housing 100.

[0072] In one possible implementation, such as Figure 2 As shown, the flexible conductor 300 includes a first body 310 and a second body 320 connected in sequence. The extending direction of the first body 310 intersects the extending direction of the second body 320. For example, the first body 310 extends vertically and the second body 320 extends horizontally, with an angle of approximately 90 degrees between them, meaning that the first body 310 and the second body 320 are perpendicular to each other. Of course, the angle can also be acute or obtuse, as long as they intersect.

[0073] The first body 310 and the second body 320 each have a first surface and a second surface. The first body 310, the second body 320, the conductive housing 100, and the display element 200 together enclose a cavity 101 with two adjacent open sides. It can be understood that since the first body 310 and the second body 320 only constitute part of the perimeter of the cavity 101, the cavity 101 is not closed at the end of the first body 310 and the end of the second body 320, thus forming two open sides that are adjacent to each other.

[0074] The two open-sided cavities 101 facilitate arrangement within space-constrained electronic devices 20. Simultaneously, the two adjacent open sides enable the antenna to exhibit bidirectional radiation characteristics, covering a wider spatial angle.

[0075] In one possible implementation, such as Figure 1 As shown, the flexible conductor 300 also includes a third body 330, which is connected to the second body 320 and is disposed opposite to the first body 310. The third body 330 has a first surface and a second surface. The first body 310, the second body 320, the third body 330, the conductive housing 100 and the display element 200 together form a cavity 101 with an open side.

[0076] For example, the first body 310, the second body 320, and the third body 330 are connected in sequence to form a U-shaped profile. The first body 310 and the third body 330 are parallel to each other, and the second body 320 is perpendicularly connected to the same end of the first body 310 and the third body 330.

[0077] The first body 310, the second body 320, and the third body 330 together constitute the three sidewalls of the cavity 101, such as the left sidewall, the bottom sidewall, and the right sidewall, leaving only one side unclosed, thus forming an open side. For example, when the U-shaped flexible conductor 300 faces upward, the cavity 101 only has a top opening. Compared to the L-shaped half-cavity antenna, the U-shaped full-cavity antenna has a higher degree of enclosure of the cavity 101, more concentrated electromagnetic energy, and higher radiation efficiency. At the same time, the single open side gives the antenna unidirectional radiation characteristics, with energy concentrated in the direction of the open side. The embodiments of this application do not limit the size of the cavity 101, which can be adjusted as needed. For example, the U-shaped full-cavity antenna has a length of 100mm, a width of 40mm, and a height of 1.8mm, while the L-shaped full-cavity antenna has a length of 60mm, a width of 30mm, and a height of 1.8mm.

[0078] In one possible implementation, the grounding assembly 400 includes at least two grounding elements 410, and the cavity 101 has intersecting first outer side wall 102 and second outer side wall 103, with the at least two grounding elements 410 respectively corresponding to the first outer side wall 102 and the second outer side wall 103.

[0079] For example, two grounding elements 410 are spaced apart, the extending directions of the two grounding elements 410 intersect, and there is a gap between the grounding elements 410 and the first outer side wall 102 and / or the second outer side wall 103.

[0080] The number of grounding elements 410 in this application embodiment is not limited. For example, a third grounding element 410 may also be included, which is correspondingly disposed on the third outer side wall.

[0081] In one possible implementation, the display 200 includes a glass cover 210 and a back plate 220. The glass cover 210 covers the back plate 220, and the periphery of the glass cover 210 extends outward from the periphery of the back plate 220. The glass cover 210 located on the outer periphery of the back plate 220 forms a shielding area, and part of the shielding area is used to form a radiation slit 201.

[0082] For example, the back plate 220 is smaller in the horizontal direction than the glass cover 210, so that there is no back plate 220 supporting the area below the periphery of the glass cover 210.

[0083] The glass cover 210 area located on the outer periphery of the back panel 220 forms a shielding area. This shielding area, also known as the black border area in display technology, is typically coated with black ink to conceal internal wiring. In this embodiment, a portion of the shielding area is used to form the radiation slit 201. Specifically, at a predetermined location in the shielding area, no conductive material is used; for example, no black conductive ink is used, or the original conductive coating is removed, making the area non-conductive and allowing electromagnetic waves to pass through. The display 200 in this application can reuse existing display 200s, such as the display screen in the laptop 10. Since the radiation slit 201 is entirely formed on the existing display 200 structure, there is no need to create any physical gaps in the conductive housing 100. Therefore, the all-metal appearance of the electronic device 20 can be completely preserved without visual damage caused by antenna design.

[0084] This application provides a specific implementation of direct power supply, combined with... Figure 3 and Figure 4 As shown, the power supply assembly 500 includes a power supply adapter 510, a power supply wire 520, and a first conductive elastomer 530. The power supply adapter 510 is provided with a radio frequency (RF) terminal 511 and a ground layer 512. The RF terminal 511 is connected to the first conductive elastomer 530 via the power supply wire 520. The first conductive elastomer 530 is connected to the backplate 220 of the display unit 200 to feed RF signals to the backplate 220. The RF terminal 511 is used to connect to a coaxial cable to receive RF signals from a wireless communication module. The direct power supply method implemented in this application is acceptable as long as it enables direct power supply; this application does not impose any limitations on this method.

[0085] Exemplarily, the power supply adapter 510 can be a printed circuit board, a flexible circuit board, or a ceramic substrate. RF terminals 511 are disposed in the first region (i.e., the signal region) of the power supply adapter 510 for connecting external RF cables. A ground layer 512 is disposed in the second region (i.e., the grounding region) of the power supply adapter 510. Exemplarily, the terminals of a coaxial cable are snapped onto the power supply adapter 510, the inner core of the coaxial cable is connected to the RF terminals 511 on the power supply adapter 510, and the outer conductor of the coaxial cable is connected to the ground layer 512 on the power supply adapter 510.

[0086] The feed line 520 is disposed on the feed adapter 510, and the radio frequency terminal 511 is electrically connected to the first conductive elastomer 530 through the feed line 520. For example, the feed line 520 can be a microstrip transmission line.

[0087] The first conductive elastomer 530 is conductive and elastic. The top surface of the first conductive elastomer 530 is connected to the back plate 220. One end of the first conductive elastomer 530 is electrically connected to the feed wire 520 (e.g., by welding or bonding with conductive adhesive), and the other end is electrically connected to the display element 200, for feeding radio frequency signals to the display element 200. Exemplarily, the first conductive elastomer 530 can be made of conductive silicone, conductive rubber, or conductive foam. The first conductive elastomer 530 elastically abuts against the back plate 220 of the display element 200, utilizing its elastic deformation to reduce assembly errors, while avoiding damage to the brittle glass cover 210 from hard contact, such as preventing white spots or cracks.

[0088] Among them, combined Figure 3 and Figure 4 As shown, the power supply adapter 510 has a grounding layer 512, which is grounded to the conductive housing 100 through ground holes 513. Exemplarily, in this embodiment, multiple ground holes 513 can be provided on the power supply adapter 510, and the inner wall of the ground holes 513 is plated with a conductive material. One end of the ground hole 513 is connected to the grounding layer 512, and the other end contacts (e.g., abuts against) the inner surface of the conductive housing 100, or is bonded to the conductive housing 100 with conductive adhesive. This application does not limit this. In this embodiment, low-impedance RF grounding can be achieved through the ground holes 513, ensuring the integrity of the power supply signal.

[0089] The embodiments of this application do not limit the specific materials and dimensions of the power supply adapter 510, the power supply wire 520 and the first conductive elastomer 530, as long as low-loss transmission of radio frequency signals can be achieved.

[0090] In this application embodiment, the placement and arrangement of the directly fed power adapter 510 (or adapter board) are not specifically limited. For example, such as... Figure 6As shown, the power supply adapter 510 is placed on the conductive housing 100, the first conductive elastomer 530 is connected to the back plate 220 of the display 200, and the edges of the power supply adapter 510 and the first conductive elastomer 530 are flush with or located outside the edge of the black border area.

[0091] In another implementation, this embodiment uses electromagnetic coupling to excite the cavity 101. The feeding assembly 500 includes a feeding adapter 510, an antenna trace 540, a conductive element 550, and a second conductive elastomer 560. The antenna trace 540 is disposed on the feeding adapter 510. A first end of the conductive element 550 is connected to the antenna trace 540, and a second end of the conductive element 550 extends to the backplate 220 of the display element 200. The second end of the conductive element 550 is connected to one end of the second conductive elastomer 560, and the other end of the second conductive elastomer 560 is connected to the conductive housing 100. The antenna trace 540 itself can radiate electromagnetic waves and is also used to couple and excite the cavity 101 to achieve a cavity radiation mode, thereby enhancing the operating bandwidth. The second conductive elastomer 560 is connected to the conductive housing 100.

[0092] The feed adapter 510 is a printed circuit board attached to the black border area of ​​the display screen. The antenna trace 540 is disposed on the feed adapter 510 and electrically connected to the RF module of the system (such as the system terminal in a computer) via a coaxial cable to receive RF excitation signals. The black border area is the shielding area formed by the glass cover plate 210 located on the outer periphery of the back panel 220. The antenna trace 540 is configured to generate resonance in a preset frequency band to couple the feed excitation cavity to achieve a cavity radiation mode, thereby enhancing the operating bandwidth. The routing of the antenna trace 540 on the feed adapter 510 is not limited in this application. Figure 7 Antenna trace 540 in the diagram is only a simplified structural example and does not represent the actual trace of antenna trace 540.

[0093] like Figure 5 As shown, the antenna trace 540 is mounted on the feed adapter 510, which is a printed circuit board. The first end of the conductive element 550 is electrically connected to the antenna trace 540, and the second end extends and is electrically connected to the back panel 220 of the display screen to facilitate grounding of the antenna trace 540. One end of the second conductive elastomer 560 is connected to the second end of the conductive element 550, and the other end of the second conductive elastomer 560 is connected to the conductive housing 100, thereby achieving grounding of the antenna trace 540.

[0094] Specifically, the conductive component is a conductive copper foil or other conductive auxiliary material, and the second conductive elastomer 560 can be conductive foam or conductive silicone. One side of the elastomer abuts against the conductive component 550, and the other side abuts against the inner surface of the conductive housing 100, thereby providing an RF reference ground for the antenna trace 540.

[0095] It is understandable that the conductive component 550 is only connected to the ground terminal of the antenna trace 540, and the radiating part of the antenna trace 540 maintains an insulating distance from the back plate 220, and the cavity 101 is excited through electromagnetic coupling.

[0096] In this embodiment, the power supply adapter 510 in the electromagnetic coupling power supply method can adopt a similar printed circuit board structure to the power supply adapter 510 in the direct power supply method, or they can adopt different printed circuit board structures. This embodiment does not limit this.

[0097] Combination Figure 2 , Figure 7 , Figure 8 , Figure 9 , Figure 10 As shown, this application embodiment provides electromagnetic simulation results of a cavity antenna structure. In the cavity antenna structure, cavity 101 is a half-cavity structure. The operating frequency band of the cavity antenna structure covers the 2.45GHz band and the 5.28GHz band, where the 2.45GHz band corresponds to the 2.4G WiFi / Bluetooth band and the 5.28GHz band corresponds to the 5G WiFi band.

[0098] Figure 7 and Figure 8 The image shows the electric field distribution of the antenna structure. The red area represents the antenna feed point. At 2.45 GHz, the electric field energy distribution is wider and diffuses more evenly from the feed point. At 5.28 GHz, the electric field energy is more concentrated near the feed point; the shorter wavelength of the high-frequency signal further concentrates the energy. The maximum electric field strength for both frequencies is around 96 dB (V / m), indicating that the antenna has a strong excitation response in both frequency bands.

[0099] Figure 9 and Figure 10The diagram shows the directional radiation characteristics of an antenna in three-dimensional space (the x, y, and z axes represent the three-dimensional space). Orange or yellow spheres represent radiation intensities in different directions; warmer colors indicate stronger radiation. Radiation efficiency represents the proportion of input power converted into radiated power by the antenna; the closer the value is to 0 dB, the higher the efficiency. The diagram shows that both frequency bands have good efficiency and low loss. Total efficiency represents the overall efficiency, including all factors such as reflection and loss. The total efficiency of 5.28 GHz is higher than that of 2.45 GHz, indicating better antenna matching and loss control in this frequency band. Directivity represents the concentration of radiated energy by the antenna; the higher the value, the stronger the directivity. 5.28 GHz has higher directivity and more concentrated radiation. The radiation pattern of 2.45 GHz is closer to a sphere, indicating that the radiation is more omnidirectional, suitable for scenarios requiring signal transmission and reception in all directions. The radiation pattern of 5.28 GHz has some dips compared to 2.45 GHz, indicating that the radiated energy is more concentrated in certain directions. The azimuth and polar angles are used to describe the radiation direction, adapting to the performance requirements of electronic devices (such as laptops) under different orientations. dB represents decibels, and GHz represents gigahertz.

[0100] Secondly, this application also provides a notebook computer 10, including a display screen, a casing, and a cavity antenna structure as described in any of the first aspects above disposed within the casing; wherein, the display element 200 of the cavity antenna structure is at least a partially conductive structure of the display screen, and the conductive housing 100 of the cavity antenna structure is at least a partially metal housing of the casing.

[0101] The notebook computer 10 includes a display screen, a casing, and a cavity antenna structure disposed within the casing as described in any of the first aspects above.

[0102] The display element 200 with cavity antenna structure is at least a portion of the conductive structure of the display screen. For example, the display screen is a liquid crystal display screen, which includes a liquid crystal panel and a back panel 220, and the display element 200 with cavity antenna structure is the back panel 220.

[0103] The conductive housing 100 of the cavity antenna structure is at least a portion of the metal housing of the casing. Exemplarily, the casing includes a screen back cover and a bottom cover, and the conductive housing 100 of the cavity antenna structure is the screen back cover.

[0104] The display screen is fixedly mounted on the inside of the screen back cover. A flexible conductor 300 (e.g., U-shaped conductive foam) is adhered between the inner surface of the screen back cover and the back plate 220 of the display screen, and is located in the top black border area of ​​the display screen. The flexible conductor 300 is compressed in the thickness direction, forming reliable electrical contact with both the screen back cover and the back plate 220. The flexible conductor 300, the screen back cover, and the back plate 220 together form a cavity 101 with a top opening. In the top black border area of ​​the glass cover plate 210 of the display screen, no conductive layer is provided at the position opposite to the opening side of the cavity 101, forming a radiation gap 201. It is understood that the embodiments of this application utilize the original black border area of ​​the display component as the radiation gap 201, thereby maintaining the complete appearance of the all-metal body, and eliminating the need for traditional antenna brackets and laser direct forming processes, thus reducing manufacturing costs.

[0105] The power supply assembly 500 is disposed at the top edge of the display screen, and its first conductive elastomer 530 (e.g., conductive silicone) elastically abuts against the back plate 220 to feed radio frequency signals into the cavity 101. The grounding assembly 400 (e.g., conductive foam strip) is disposed on the outer side of the first and second side walls of the cavity 101 and abuts against both the screen back cover and the back plate 220.

[0106] The laptop 10 has no physical grooves or plastic fillers on the back cover of the screen, thus maintaining the complete appearance of the all-metal body. At the same time, since the cavity 101 is located at the top of the display screen, away from the bottom area where the user holds the laptop and the keyboard area, the antenna performance is not easily affected by external interference.

[0107] Thirdly, this application also provides an electronic device 20, including a cavity antenna structure as described in any of the first aspects above or a laptop computer 10 as described in the second aspect above.

[0108] The electronic device 20 includes the cavity antenna structure described above, or the laptop computer 10 described above. This application does not limit the specific type of the electronic device 20; for example, the electronic device 20 can be a tablet computer, a laptop computer, a foldable electronic device 20, an in-vehicle central control system, an industrial handheld terminal, etc.

[0109] Taking a tablet computer as an example, it includes a metal back cover and a display screen. The conductive housing 100 of the cavity antenna structure is the metal back cover, and the display element 200 is the display screen. A flexible conductor 300 is arranged along the top edge of the display screen, forming a cavity 101 together with the metal back cover and the display screen. The top black border area of ​​the display screen forms a radiation slot 201. The feeding assembly 500 is disposed at the top edge of the display screen in the cavity 101. This tablet computer can achieve broadband antenna radiation without cutting slots in the metal back cover, and the antenna performance is basically unaffected when the user holds the bottom of the tablet computer or places it on a table.

[0110] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0111] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope.

Claims

1. A cavity antenna structure, characterized in that, include: Conductive housing (100); Display element (200), at least a portion of the display element (200) forms a radial slit (201); A flexible conductor (300) is disposed between and electrically connected to the conductive housing (100) and the display element (200). The flexible conductor (300), the display element (200), and the conductive housing (100) surround and form a cavity (101). At least a portion of the radiation slit (201) is disposed opposite to the cavity (101). A grounding assembly (400) is located between the conductive housing (100) and the display element (200), and is located outside the cavity (101); A power supply assembly (500) is used to couple or directly feed radio frequency signals into the cavity (101).

2. The cavity antenna structure according to claim 1, characterized in that, The flexible conductor (300) has a first side and a second side arranged opposite to each other. The first side elastically abuts against the conductive housing (100), and the second side elastically abuts against the display element (200). At least a portion of the flexible conductor (300) is bent so that the flexible conductor (300), the conductive housing (100), and the display element (200) together enclose a cavity (101) having at least one open side, and the open side is arranged toward the outer edge of the conductive housing (100).

3. The cavity antenna structure according to claim 2, characterized in that, The flexible conductor (300) includes a first body (310) and a second body (320) connected in sequence. The extension direction of the first body (310) intersects the extension direction of the second body (320). The first body (310) and the second body (320) each have a first surface and a second surface. The first body (310), the second body (320), the conductive shell (100), and the display element (200) together enclose a cavity (101) with two adjacent open sides.

4. The cavity antenna structure according to claim 3, characterized in that, The flexible conductor (300) further includes a third body (330), which is connected to the second body (320). The third body (330) is disposed opposite to the first body (310). The third body (330) has a first surface and a second surface. The first body (310), the second body (320), the third body (330), the conductive housing (100), and the display element (200) together enclose a cavity (101) with an open side.

5. The cavity antenna structure according to any one of claims 1-4, characterized in that, The grounding assembly (400) includes at least two grounding elements (410), and the cavity (101) has intersecting first outer side wall (102) and second outer side wall (103). The at least two grounding elements (410) are respectively arranged in a one-to-one correspondence with the first outer side wall (102) and the second outer side wall (103).

6. The cavity antenna structure according to any one of claims 1-4, characterized in that, The display element (200) includes a glass cover plate (210) and a back plate (220). The glass cover plate (210) covers the back plate (220). The periphery of the glass cover plate (210) extends outward from the periphery of the back plate (220). The glass cover plate (210) located on the outer periphery of the back plate (220) forms a shielding area. Part of the shielding area is used to form the radiation slit (201).

7. The cavity antenna structure according to any one of claims 1-4, characterized in that, The power supply assembly (500) includes a power supply adapter (510), a power supply wire (520), and a first conductive elastomer (530). The power supply adapter (510) is provided with a radio frequency terminal (511) and a ground layer (512). The radio frequency terminal (511) is connected to the first conductive elastomer (530) through a power supply wire (520). The first conductive elastomer (530) is connected to the display (200) for power supply to the back plate (220) of the display (200). The ground layer (512) is used to connect to the conductive housing (100) through a ground hole (513).

8. The cavity antenna structure according to any one of claims 1-4, characterized in that, The power supply assembly (500) includes a power supply adapter (510), an antenna trace (540), a conductive element (550), and a second conductive elastomer (560). The antenna trace (540) is disposed on the power supply adapter (510). The first end of the conductive element (550) is connected to the antenna trace (540), and the second end of the conductive element (550) extends to the back plate (220) of the display element (200). The second end of the conductive element (550) is connected to one end of the second conductive elastomer (560), and the other end of the second conductive elastomer (560) is connected to the conductive housing (100).

9. A laptop computer, characterized in that, include: The display screen, the housing, and the cavity antenna structure as described in any one of claims 1-8 disposed within the housing; wherein the display element (200) of the cavity antenna structure is at least a partially conductive structure of the display screen, and the conductive housing (100) of the cavity antenna structure is at least a partially metallic housing of the housing.

10. An electronic device, characterized in that, include: The cavity antenna structure as described in any one of claims 1-8 or the laptop computer (10) as described in claim 9.

Images