Antenna structure and electronic equipment
By setting up a reflective metasurface structure at the antenna breaks, the problem of insufficient isolation of adjacent antennas under the ultimate space design is solved, and efficient isolation between antennas and radiation efficiency is achieved, which is suitable for antenna layouts in the ultimate space design.
Patent Information
- Application Number
- CN202422065171.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-08-23
AI Technical Summary
Under the ultimate space design, the isolation between adjacent antennas in the prior art is insufficient, and the space of the back rib strips is limited, resulting in a general isolation effect.
A reflective metasurface structure is adopted, including a floor layer, an insulating dielectric layer and a metasurface metal unit layer. By stacking them at the antenna breaking joint, the metasurface metal unit layer is electrically connected to the first frame radiation arm, and the floor layer is electrically connected to the second frame radiation arm. The resonant frequency of the reflective metasurface structure is located in the target reflective frequency band to reflect coupling energy and improve isolation.
Under the extreme space design, the isolation and radiation efficiency between antennas are improved through the reflective metasurface structure, and the length requirement for the first frame radiation arm is reduced, which is conducive to realizing the antenna layout under the extreme space design.
Smart Images
Figure CN223193990U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of terminal technology, and in particular to an antenna structure and an electronic device. Background Art
[0002] For the antenna layout of existing equipment, in order to reduce the isolation between adjacent antennas, ground return ribs are usually set between adjacent antennas. The width of the ground return ribs will also affect the isolation effect to a certain extent. However, in the context of extreme space design, the space left for the ground return ribs is limited, which also leads to mediocre isolation effect of the ground return ribs. Utility Model Content
[0003] The present disclosure provides an antenna structure and an electronic device to address the deficiencies in the related art.
[0004] According to a first aspect of an embodiment of the present disclosure, there is provided an antenna structure, including:
[0005] a first frame radiation arm;
[0006] a second frame radiation arm, wherein a gap is formed between the second frame radiation arm and the first frame radiation arm;
[0007] A reflective metasurface structure, wherein the reflective metasurface structure is partially arranged at the fracture, and the reflective metasurface structure includes a stacked floor layer, an insulating dielectric layer and a metasurface metal unit layer, and the stacking direction is parallel to the direction in which the first frame radiation arm points to the second frame radiation arm; the insulating dielectric layer is arranged between the floor layer and the metasurface metal unit layer, the metasurface metal unit layer is electrically connected to the first frame radiation arm, and the floor layer is electrically connected to the second frame radiation arm.
[0008] Optionally, the resonant frequency of the reflective metasurface structure is within the frequency range of the target reflection frequency band.
[0009] Optionally, the metasurface metal unit layer includes a plurality of spaced-apart metal units, any one of the plurality of metal units is electrically connected to the first frame radiation arm, and adjacent metal units are coupled to each other.
[0010] Optionally, the reflective metasurface structure further includes a metal piece, which connects any one of the metal units and the first frame radiation arm, and the metal piece is located below the end of the first frame radiation arm.
[0011] Optionally, the plurality of metal units are arranged in multiple rows and columns.
[0012] Optionally, the plurality of metal units are arranged in four rows and three columns.
[0013] Optionally, in the row direction, the length of each of the metal units is between 0.6 mm and 0.8 mm.
[0014] Optionally, also include:
[0015] A metal plate, wherein the first frame radiating arm and the second frame radiating arm are both located outside the metal plate and respectively cooperate with the metal plate to form a clearance, the clearance between the first frame radiating arm and the metal plate being a one-piece clearance, the one-piece clearance being connected to the fracture, and the metal plate being connected to the floor layer;
[0016] A SAR sensor is electrically connected to the first frame radiation arm.
[0017] Optionally, there is at least one identical frequency band in the frequency band covered by the first border radiation arm and the frequency band covered by the second border radiation arm.
[0018] According to a second aspect of an embodiment of the present disclosure, an electronic device is provided, comprising the antenna structure as described in any one of the above embodiments, wherein the first frame radiation arm and the second frame radiation arm respectively form a portion of the outer frame of the electronic device.
[0019] The technical solutions provided by the embodiments of the present disclosure may have the following beneficial effects:
[0020] It can be seen from the above embodiments that the metasurface metal unit layer and the first frame radiation arm in the present disclosure can be used together as radiation arms to extend the electrical length, thereby reducing the length requirement of the first frame radiation arm when radiating the same frequency band, which is conducive to realizing the antenna layout under the ultimate space design; and through the reflective metasurface structure, most or even all of the coupling energy can be reflected, thereby improving the isolation between the first frame radiation arm and the second frame radiation arm, and improving the radiation efficiency of the antenna structure.
[0021] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.
[0023] Figure 1 The figure is a schematic structural diagram of an antenna structure according to an exemplary embodiment.
[0024] Figure 2 is a schematic diagram of a reflective metasurface structure according to an exemplary embodiment.
[0025] Figure 3 It is a radiation efficiency curve of the B41 frequency band in the related technology and the technical solution of the present disclosure according to an exemplary embodiment.
[0026] Figure 4 1 is a top view of a reflective metasurface structure according to an exemplary embodiment. DETAILED DESCRIPTION
[0027] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
[0028] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
[0029] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining."
[0030] Figure 1 is a structural diagram of an antenna structure according to an exemplary embodiment. Figure 2 FIG. 1 is a schematic diagram of a reflective metasurface structure according to an exemplary embodiment. Figure 1 and Figure 2As shown, the antenna structure includes a first frame radiation arm 1, a second frame radiation arm 2 and a reflective metasurface structure 3. The first frame radiation arm 1 and the second frame radiation arm 2 cooperate to form a fracture, and the reflective metasurface structure 3 is partially arranged in the fracture. The reflective metasurface structure 3 includes a floor layer 31, an insulating dielectric layer 32 and a metasurface metal unit layer 33. The floor layer 31, the insulating dielectric layer 32 and the metasurface metal unit layer 33 are stacked, and the insulating dielectric layer 32 is arranged between the floor layer 31 and the metasurface metal unit layer 33. The stacking direction of the floor layer 31, the insulating dielectric layer 32 and the metasurface metal unit layer 33 is parallel to the direction from the first frame radiation arm 1 to the second frame radiation arm 2, that is, Figure 1 As shown in , the stacking direction is the up-down direction, and the direction from the first frame radiation arm 1 to the second frame radiation arm 2 is also the up-down direction.
[0031] The metasurface metal unit layer 33 is electrically connected to the first frame radiating arm 1, allowing the metasurface metal unit layer 33 and the first frame radiating arm 1 to function together as a radiating arm, thereby extending the electrical length. This reduces the length requirement for the first frame radiating arm 1 when radiating the same frequency band, facilitating antenna layout in an extremely space-efficient design. The floor layer 31 is electrically connected to the second frame radiating arm 2. This allows for the subsequent reflection of most or even all of the electrical signal generated by the first frame radiating arm 1 when coupled to the reflective metasurface structure 3, thereby improving the isolation between the first frame radiating arm 1 and the second frame radiating arm 2 and enhancing the radiation efficiency of the antenna structure.
[0032] Among them, the reflection of the electromagnetic signal can be achieved by adjusting the resonant frequency of the reflective metasurface structure 3, and the resonant frequency of the reflective metasurface structure 3 can be located within the frequency range of the target reflection frequency band. For example, taking the first frame radiation arm 1 and the second frame radiation arm 2 both radiating the B41 (2496MHz-2690MHz) frequency band as an example, the resonant frequency of the reflective metasurface structure 3 can be located near 2.65GHz, so that the current at this frequency point is reflected when passing through the reflective metasurface structure 3. Of course, the resonant frequency of the reflective metasurface structure 3 can also be within the frequency range of the B3 frequency band or other frequency bands, thereby achieving reflection of the current in this frequency band. When multiple identical frequency bands are covered between the first frame radiation arm 1 and the second frame radiation arm 2, the resonant frequency of the reflective metasurface structure 3 can be designed based on the frequency range of the frequency band with the smallest isolation.
[0033] In some embodiments, the first frame radiation arm 1 and the second frame radiation arm 2 can be same-frequency antennas, that is, there is at least one same frequency band in the frequency bands covered by the first frame radiation arm 1 and the second frame radiation arm 2, so that the isolation between the same-frequency antennas can be improved by setting the reflective metasurface structure 3. For example, the first frame radiation arm 1 and the second frame radiation arm 2 both cover the B41 frequency band, and the reflective metasurface structure 3 is not set in the related art. When the end of the first frame radiation arm 1 of the second frame radiation arm 2 is returned to the ground through the conventional return rib, when the first frame radiation arm 1 and the second frame radiation arm 2 both radiate the B41 frequency band, the signal can be coupled to the second frame radiation arm 2 through the gap. After passing through the return rib, some interference signals can be conducted to the ground, but there will still be some interference signals that affect the original current flow direction and current intensity of the second frame radiation arm 2, resulting in a decrease in isolation and a decrease in the radiation performance of the second frame radiation arm 2. In the technical solution disclosed in the present invention, by setting the reflective metasurface structure 3, the ground return requirement of the second frame radiation arm 2 is achieved through the floor layer 31, and all interference signals are reflected, thereby improving the isolation and the radiation performance of the second frame radiation arm 2. Figure 3 As shown, the purple curve is the radiation efficiency curve of the second frame radiation arm 2 in the B41 frequency band in the related technology, and the green curve is the radiation efficiency curve of the second frame radiation arm 2 in the B41 frequency band in the technical solution disclosed in the present invention. By comparison, it can be seen that the radiation efficiency of the second frame radiation arm 2 in the B41 frequency band is improved by about 0.6dB.
[0034] In some embodiments, the metasurface metal unit layer 33 may include a single metal unit. In other embodiments, for example Figure 2 and Figure 4 As shown, the metasurface metal unit layer 33 may include a plurality of spaced metal units, any one of which is electrically connected to the first frame radiation arm 1, and adjacent metal units are coupled to each other to transmit signals, thereby simplifying the connection circuit between the metasurface metal unit layer 33 and the first frame radiation arm 1. The plurality of metal units are arranged in multiple rows and columns to arrange them in a regular manner and ensure that adjacent metal units can be coupled. For example, Figure 4 As shown, the plurality of metal units are arranged in four rows and three columns. In the row direction, the length of each metal unit is between 0.6 mm and 0.8 mm. For example, the length of the metal unit can be 0.65 mm, 0.7 mm or 0.8 mm, and the design is adjusted specifically according to the resonant frequency of the reflective metasurface structure 3. The lengths of the plurality of metal units can be the same or different, and the cross-sectional areas of the plurality of metal units can be the same or different, and the design is adjusted specifically according to the resonant frequency of the reflective metasurface structure 3. The material of the metal unit can be copper, gold, silver or other metal materials, and the present disclosure is not limited thereto.
[0035] In order to achieve electrical connection between the metasurface metal unit layer 33 and the first frame radiation arm 1, the reflective metasurface structure 3 also includes a metal part 34, which connects any metal unit and the first frame radiation arm 1. The metal part 34 is located below the end of the first frame radiation arm, thereby reducing the length of the metal part 34 and improving the stability of the electrical connection between the metasurface metal unit layer 33 and the first frame radiation arm 1. The height of the metal part 34 can be between 0.1mm and 0.5mm. Other insulating materials can be filled between the first frame radiation arm 1 and the insulating dielectric layer 32, or the gap between the metasurface metal unit layer 33 and the first frame radiation arm 1 can be blocked by the insulating dielectric layer 32.
[0036] In each of the above embodiments, the antenna structure further includes a metal plate 4 and a SAR sensor 5. The first frame radiating arm 1 and the second frame radiating arm 2 are both located outside the metal plate 4 and cooperate with the metal plate 4 to form a clearance. The clearance between the first frame radiating arm 1 and the metal plate 4 is a one-piece clearance, which is connected to the fracture, and the metal plate 4 is connected to the floor layer 31. The one-piece clearance can be understood as the absence of any ground return ribs between the first frame radiating arm 1 and the metal plate 4, thereby achieving a suspended configuration of the first frame radiating arm 1. This allows the SAR sensor 5 to be electrically connected to the first frame radiating arm 1, thereby achieving SAR detection of the antenna structure.
[0037] Based on the technical solution of the present disclosure, an electronic device is also provided. The electronic device may include the antenna structure described in any of the above embodiments, wherein the first frame radiating arm 1 and the second frame radiating arm 2 each form a portion of the outer frame of the electronic device. For example, the first frame radiating arm 1 may be a corner antenna, which may be located at the top left or top right of the electronic device, and the specific design can be as needed. The electronic device may include a mobile phone, a tablet device, etc.
[0038] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the disclosure herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.
[0039] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims
1. An antenna structure, characterized in that: include: a first frame radiation arm; a second frame radiation arm, wherein a gap is formed between the second frame radiation arm and the first frame radiation arm; A reflective metasurface structure, wherein the reflective metasurface structure is partially arranged at the fracture, and the reflective metasurface structure includes a stacked floor layer, an insulating dielectric layer and a metasurface metal unit layer, and the stacking direction is parallel to the direction in which the first frame radiation arm points to the second frame radiation arm; the insulating dielectric layer is arranged between the floor layer and the metasurface metal unit layer, the metasurface metal unit layer is electrically connected to the first frame radiation arm, and the floor layer is electrically connected to the second frame radiation arm.
2. The antenna structure according to claim 1, characterized in that The resonant frequency of the reflective metasurface structure is within the frequency range of the target reflection frequency band.
3. The antenna structure according to claim 1, wherein: The metasurface metal unit layer includes a plurality of spaced-apart metal units, any one of the plurality of metal units is electrically connected to the first frame radiation arm, and adjacent metal units are coupled to each other.
4. The antenna structure according to claim 3, characterized in that: The reflective metasurface structure further includes a metal piece, which connects any of the metal units and the first frame radiation arm, and the metal piece is located below the end of the first frame radiation arm.
5. The antenna structure according to claim 3, characterized in that: The plurality of metal units are arranged in multiple rows and columns.
6. The antenna structure according to claim 5, characterized in that: The plurality of metal units are arranged in four rows and three columns.
7. The antenna structure according to claim 5, characterized in that: In the row direction, the length of each of the metal units is between 0.6 mm and 0.8 mm.
8. The antenna structure according to claim 1, wherein: Also includes: A metal plate, wherein the first frame radiating arm and the second frame radiating arm are both located outside the metal plate and respectively cooperate with the metal plate to form a clearance, the clearance between the first frame radiating arm and the metal plate being a one-piece clearance, the one-piece clearance being connected to the fracture, and the metal plate being connected to the floor layer; A SAR sensor is electrically connected to the first frame radiation arm.
9. The antenna structure according to claim 1, wherein: There is at least one identical frequency band in the frequency band covered by the first frame radiation arm and the frequency band covered by the second frame radiation arm.
10. An electronic device, characterized in that: Comprising the antenna structure according to any one of claims 1 to 9, the first frame radiation arm and the second frame radiation arm respectively form a portion of the outer frame of the electronic device.