Embedded cavity antenna and electronic equipment

Abstract

The invention relates to the technical field of antennas, and provides an embedded cavity antenna and electronic equipment, and the embedded cavity antenna comprises an antenna body. The antenna body comprises a cavity layer and a high-frequency branch layer which are connected with each other; a semi-closed cavity and a monopole antenna body located in the semi-closed cavity are arranged in the cavity layer; and the high-frequency branch node layer is provided with a plurality of frequency band branch nodes connected with the monopole antenna body. The electronic equipment comprises the embedded cavity antenna, the semi-closed cavity in the cavity layer, the monopole antenna body and the frequency band branch knot in the high-frequency branch knot layer can be ingeniously combined by the embedded cavity antenna and the monopole antenna, the signal transmission stability of the high frequency band and the low frequency band is enhanced, resonant wavelength optimization is carried out on different frequency bands, the signal penetration effect is improved, and the signal transmission efficiency is improved. Therefore, extra clearance or windowing is not needed, the monopole antenna body is used as the feed of the semi-closed cavity, the bandwidth can be expanded for the high frequency in the high-frequency branch node layer, the placement difficulty of a traditional antenna is overcome, and many limitations on space and materials in the design of embedding the antenna into a foot pad are solved.

Description

Technical Field

[0001] The present disclosure relates to the field of antenna technology, and in particular to an embedded cavity antenna and electronic equipment. Background Art

[0002] In the field of wireless communications, Wi-Fi antennas are an essential component of connecting devices to the network. However, when these antennas are integrated into devices with housings made of different materials, especially metal, a persistent problem arises: the metal housing tends to interfere with signal propagation, resulting in signal attenuation, reduced coverage, and overall performance degradation. This problem is particularly evident in devices where the antenna must be embedded inside the housing, such as compact consumer electronics.

[0003] Existing solutions to this problem include:

[0004] External antenna: One of the common methods is to use an external antenna, placing the antenna outside the metal casing. Although this can improve signal reception and transmission, it usually affects the aesthetic design of the device and increases the risk of antenna damage, reducing the overall durability of the product.

[0005] Shielding techniques: Another approach is to use various shielding techniques to reduce the interference of metal housings on the signal. This may include adding layers of insulating material between the antenna and the metal housing, or designing the antenna to avoid direct contact with the metal. However, these methods are costly, increase manufacturing complexity, and may not completely eliminate interference. In addition, the additional material may make the device bulkier or less efficient in dissipating heat.

[0006] Alternative materials: Some designs choose to replace metal housings with non-metallic materials such as plastics or composites. Although this can reduce signal interference, it reduces the durability and premium feel of metal housings, and may not meet industry standards or consumer expectations for certain products where metal durability, heat dissipation, or aesthetic characteristics are required.

[0007] In view of this, there is an urgent need for an antenna with a new structure in the market to solve the problems of the above-mentioned existing antenna technology being easily interfered and attenuated by the metal casing of the device and having limited installation position. Summary of the invention

[0008] The embodiments of the present disclosure provide an embedded cavity antenna and an electronic device, in order to solve the problems in the prior art that the antenna is easily interfered and attenuated by the metal shell of the device and the installation position is limited.

[0009] The embedded cavity antenna provided in the embodiment of the present disclosure can be embedded in the housing foot pad of the electronic device, and includes an antenna body;

[0010] The antenna body comprises a cavity layer and a high-frequency branch node layer which are connected to each other;

[0011] The cavity layer has a semi-enclosed cavity and a monopole antenna body located in the semi-enclosed cavity;

[0012] The high-frequency branch node layer has a plurality of frequency band branches connected to the monopole antenna body.

[0013] In one possible implementation, the cavity layer includes a plurality of stacked PCB structures;

[0014] A plurality of the PCB structures are also provided with conductive via structures;

[0015] The monopole antenna body is arranged in the PCB structure and the via structure.

[0016] In one possible implementation manner, the cavity layer further includes a ground layer disposed on upper and lower sides of the PCB structure;

[0017] The two ground layers and the via structure together form the semi-enclosed cavity.

[0018] In one possible implementation manner, the high-frequency branch node layer is partially protruded and disposed below the cavity layer along the thickness direction of the cavity layer.

[0019] In one embodiment, the

[0020] The length, width and thickness of the cavity layer does not exceed 60mm×6mm×2mm;

[0021] The length, width and thickness of the high-frequency branch layer does not exceed 9mm×5mm×2.5mm.

[0022] In one possible implementation manner, the high-frequency branch node layer at least includes the frequency band branches extending in two different directions and having different extension lengths;

[0023] Furthermore, the resonant wavelength of each branch in the frequency band is different.

[0024] In one possible implementation manner, a reflection groove is further provided in the high-frequency branch node layer;

[0025] The reflection groove is arranged at the peripheral edge of the high-frequency branch node layer, and is used to reflect the frequency band signals of each of the frequency band branches.

[0026] In one possible implementation, the antenna body further includes a signal isolation layer;

[0027] The signal isolation layer is arranged between the high-frequency branch layer and the device housing, and is used to form a reflection layer in the signal transmission path.

[0028] In addition, an embodiment of the present disclosure further provides an electronic device, which includes a device body and the above-mentioned embedded cavity antenna;

[0029] The metal bottom shell of the device body has a non-metallic foot pad structure that is recessed downwards, and the non-metallic foot pad structure is used to place the high-frequency branch layer, and an opening slit is also opened on the metal bottom shell;

[0030] The cavity layer in the antenna body is correspondingly arranged on the inner side of the bottom shell wall, and the high-frequency branch node layer is correspondingly arranged in the foot pad structure formed by the depression.

[0031] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0032] The embedded cavity antenna provided in the disclosed embodiment innovatively improves the essence of the "embedded antenna" by cleverly combining the "semi-enclosed cavity + monopole antenna body" in the cavity layer and multiple "band branches" of specific lengths in the high-frequency branch layer to enhance the stability of high-frequency and low-frequency signal transmission. The resonant wavelengths of different frequency bands are optimized through size design to improve signal penetration, so there is no need for additional clearance or window openings. The monopole antenna body is used as the feed for the semi-enclosed cavity, and at the same time, the bandwidth can be expanded for the high frequency in the high-frequency branch layer, overcoming the difficulties of traditional antenna placement and solving the many space and material limitations in the design of antenna embedded in the foot pad. The innovative significance is very significant.

[0033] In addition, the electronic device provided by the embodiment of the present disclosure includes the above-mentioned embedded cavity antenna, which can achieve the same beneficial effects and will not be described in detail here.

[0034] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, in which:

[0036] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0037] Figure 1 A structural diagram of an embedded cavity antenna provided by an embodiment of the present disclosure is shown;

[0038] Figure 2 A partial cross-sectional view of an electronic device provided by an embodiment of the present disclosure is shown.

[0039] Explanation of the reference numerals in the figure: 1, antenna body; 11, cavity layer; 111, via structure; 12, high-frequency branch layer; 121, frequency band branch;

[0040] 2. Equipment body; 21. Foot pad structure; 22. Metal bottom shell; 221. Opening seam. DETAILED DESCRIPTION

[0041] In order to make the purpose, features, and advantages of the present disclosure more obvious and easy to understand, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0042] The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0043] Combination Figure 1 and Figure 2 As shown, an embodiment of the present disclosure provides an embedded cavity antenna that can be embedded in the shell foot pad of an electronic device, and includes an antenna body 1; the antenna body 1 includes a cavity layer 11 and a high-frequency branch layer 12 that are connected to each other; the cavity layer 11 has a semi-enclosed cavity, and a monopole antenna body located in the semi-enclosed cavity; the high-frequency branch layer 12 has a plurality of frequency band branches 121 connected to the monopole antenna body.

[0044] When the embedded cavity antenna is actually installed and used, it can fully and cleverly utilize the recessed space in the foot pad of the electronic device housing for installation, saving the installation space inside the electronic device while optimizing the shape and placement angle of the antenna, and can also integrate the housing foot pad function with the antenna performance. When the electronic device is placed horizontally, the antenna signal of the antenna body 1 can be effectively extended through the housing foot pad at the bottom of the device housing, improving the efficiency and quality of the antenna signal coverage, and the selection of the foot pad material further enhances the effectiveness of this design.

[0045] Moreover, the inventor emphasizes that the embedded cavity antenna provided in the embodiment of the present disclosure is fundamentally different from the antenna embedded and integrated in the shell foot pad in the prior art. The embedded integrated foot pad antenna in the prior art is mostly an IFA antenna, which requires antenna clearance to be reserved above the device shell and cannot be implemented on a full metal shell. The embedded cavity antenna provided in the embodiment of the present disclosure does not need to reserve antenna clearance above the device shell, and the normal use function of the antenna body 1 can be achieved only through the opening slit in the shell foot pad itself. The specific working principle is described as follows:

[0046] The embedded cavity antenna provided by the embodiment of the present disclosure comprises an antenna body 1 which comprises a cavity layer 11 and a high-frequency branch layer 12 which are connected to each other, and the cavity layer 11 comprises a semi-enclosed cavity and a monopole antenna body located in the semi-enclosed cavity, and the high-frequency branch layer 12 comprises a plurality of frequency band branches 121 connected to the monopole antenna body, such a monopole antenna body can form a resonant cavity design through the semi-enclosed cavity, and through the specific size design of the semi-enclosed cavity, the low-frequency 2.4 GHz signal that can be specifically generated by the monopole antenna body can oscillate back and forth and be strengthened in the semi-enclosed cavity, and then radiate outward from the radiation port of the semi-enclosed cavity, so that the externally radiated signal and the useless noise in the system are effectively isolated, and the advantages of the "monopole antenna" and the "cavity antenna" are perfectly integrated, and the monopole antenna uses the semi-enclosed cavity as the feed of the "cavity antenna".

[0047] In addition, the high-frequency branch node layer 12 has multiple frequency band branches 121. By utilizing highly conductive metal branches to form multiple frequency band branches 121, they can be specifically designed and used for high frequency bands (5GHz and 6GHz), and the length of each frequency band branch 121 is precisely adjusted according to the frequency band wavelength requirements. In addition, multiple frequency band branches 121 are connected to the monopole antenna body, so that the monopole antenna body can expand the bandwidth for high frequency. Such a design has never been seen before and is very clever.

[0048] In summary, the embedded cavity antenna provided by the embodiment of the present disclosure has subverted and innovated the essence of the "embedded antenna", and has enhanced the stability of high-frequency and low-frequency signal transmission through the clever combination of the "semi-enclosed cavity + monopole antenna body" in the cavity layer 11 and the "frequency band branches 121" of multiple specific lengths in the high-frequency branch layer 12. Through the size design, the resonance wavelength of different frequency bands is optimized to improve the signal penetration effect, so there is no need for additional clearance or window opening. The monopole antenna body is used as the feed of the semi-enclosed cavity, and at the same time, the bandwidth can be expanded for the high frequency in the high-frequency branch layer 12, which overcomes the difficulties in placing traditional antennas and solves many space and material limitations in the design of antenna embedded in the foot pad. The innovative significance is very significant.

[0049] In one possible implementation, the cavity layer 11 includes a plurality of stacked PCB structures; a conductive via structure 111 is further provided in the plurality of PCB structures; and the monopole antenna body is disposed in the PCB structure and the via structure 111 .

[0050] Conventional cavity antennas in the prior art usually have relatively balanced dimensions in three directions of length, width and thickness, but this is not conducive to installation and placement in a housing foot pad with a compact space.

[0051] Therefore, the embedded cavity antenna provided in the embodiment of the present disclosure specifically configures the cavity layer 11 into a stacked PCB structure, and a conductive via structure 111 is also provided in the PCB structure. The monopole antenna body is arranged in the PCB structure and the via structure 111. In this way, a "three-dimensional" cavity layer 11 is formed by stacking multiple "two-dimensional" PCBs, and the cavity layer 11 can be extremely compressed in the thickness direction. The via structure 111 in the thickness direction of the PCB structure is used as a metal wall in the thickness direction of the monopole antenna body, which is unprecedented in antenna design. For an antenna that resonates at 2.4GHz, its wavelength is about 125mm, but after using this solution, the size of the cavity layer 11 in the thickness direction can be 2mm or even smaller, which is less than 1 / 60 of the complete wavelength, fully demonstrating the superiority of this design concept.

[0052] The innovative design of the cavity layer 11 can greatly simplify the manufacturing process of the embedded cavity antenna and significantly reduce the cost.

[0053] In one possible implementation manner, the cavity layer 11 further includes ground layers disposed on the upper and lower sides of the PCB structure; and the two ground layers and the via structure 111 together form a semi-enclosed cavity.

[0054] The cavity layer 11 has ground layers on the upper and lower sides of the PCB structure. The two ground layers and the via structure 111 together form a semi-closed cavity. This design can generate a stable electric field in the semi-closed cavity, so that low-frequency signals can resonate efficiently in this semi-closed space.

[0055] In one embodiment, the high-frequency branch node layer 12 is partially protruded and disposed below the cavity layer 11 along the thickness direction of the cavity layer 11 .

[0056] Specific, combined Figure 1 To further explain in detail, since the high-frequency branch node layer 12 is embedded in the recessed foot pad of the device shell, the actual size of the high-frequency branch node layer 12 can be adjusted and set according to the size of the recessed foot pad of the shell. The high-frequency branch node layer 12 can be specifically set to be raised below a corner of the cavity layer 11.

[0057] In one possible implementation manner, the length, width and thickness of the cavity layer 11 does not exceed 60 mm×6 mm×2 mm; the length, width and thickness of the high-frequency branch layer 12 does not exceed 9 mm×5 mm×2.5 mm.

[0058] The length, width and thickness of the cavity layer 11 is not more than 60mm×6mm×2mm, and the length, width and thickness of the high-frequency branch layer 12 is not more than 9mm×5mm×2.5mm. This can fully limit the space occupied by the embedded cavity antenna. When it is specifically installed in the device shell, it can be placed in the narrow gap between the device battery and the device shell, and the high-frequency branch layer 12 is correspondingly embedded in the recessed foot pad of the shell, thereby fully improving the installation flexibility of the embedded cavity antenna.

[0059] In one possible implementation, the high-frequency branch node layer 12 at least includes frequency band branches 121 extending in two different directions and with different extension lengths; and the resonance wavelength of each frequency band branch node 121 is different.

[0060] Specific, combined Figure 1 To further explain in detail, the frequency band branch 121 can be specifically configured to be bent vertically along the length, width and thickness directions of the surface of the high-frequency branch layer 12. Through the precise length of the highly conductive metal branches in the frequency band branch 121, each frequency band branch 121 can correspond to a different frequency band.

[0061] In one possible implementation manner, a reflection groove is further provided in the high-frequency branch node layer 12 ; the reflection groove is provided at the peripheral edge of the high-frequency branch node layer 12 to reflect the frequency band signals of the branches 121 of each frequency band.

[0062] Reflection grooves are also arranged in the peripheral edge of the high-frequency branch node layer 12. The reflection grooves are finely arranged in the peripheral edge of the high-frequency branch node layer 12 according to the microwave waveguide theory, so that the high-frequency signal can be reflected at the peripheral edge, avoiding the frequency band deviation of the high-frequency signal (5GHz and 6GHz) due to contact with metal, and realizing lossless transmission of the high-frequency band (5GHz and 6GHz) signals of the antenna.

[0063] In addition, an embodiment of the present disclosure also provides an electronic device, which includes a device body 2 and the above-mentioned embedded cavity antenna; the metal bottom shell 22 of the device body 2 has a non-metallic foot pad structure 21 formed by a downward depression, and the metal bottom shell 22 also has an open seam 221; the cavity layer 11 in the antenna body 1 is correspondingly arranged on the inner side of the bottom shell wall, and the high-frequency branch layer 12 is correspondingly arranged in the non-metallic foot pad structure 21 formed by the depression.

[0064] Specific, combined Figure 2 To further explain in detail, the electronic device can be but is not limited to a laptop computer, an all-in-one host computer or other electronic device having a non-metallic foot pad structure 21. Since the electronic device includes the above-mentioned embedded cavity antenna, all its beneficial effects can be achieved, which will not be further elaborated here.

[0065] In addition, the device body 2 has a non-metallic foot pad structure 21 that is recessed downward, and the metal bottom shell 22 is also provided with an opening slit 221, so that the normal use function of the embedded cavity antenna can be realized through the opening slit 221 on the metal bottom shell 22.

[0066] In summary, the embedded cavity antenna and electronic device provided in the embodiments of the present disclosure fully integrate and utilize the advantages of the "monopole antenna" and the "cavity antenna". A resonant cavity design is formed by the monopole antenna body and the semi-closed cavity in the cavity layer 11, so that the low-frequency signal generated by the monopole antenna body can oscillate back and forth in the semi-closed cavity and be strengthened, and then radiate outward from the radiation port of the semi-closed cavity. The monopole antenna uses the semi-closed cavity as the feed of the "cavity antenna", thereby achieving a perfect fusion of the advantages of the "monopole antenna" and the "cavity antenna". And the high-frequency branch layer 12 in the antenna body 1 is used to overcome the installation disadvantages at the device foot pad. The unique structural shape of the high-frequency branch layer 12 not only fills the recessed space at the device foot pad, but also realizes the integration of function and structure. By optimizing the length and shape of the mid-frequency branch 121 of the high-frequency branch layer 12 and using the monopole antenna body in the cavity layer 11 to expand its own high-frequency bandwidth, when the electronic device is placed horizontally, the antenna signal is effectively extended at the bottom of the non-metallic foot pad structure 21, thereby improving the efficiency and quality of the antenna signal coverage. The material selection of the foot pad structure and the surface treatment of the antenna body 1 can further enhance the effectiveness of this design.

[0067] The design of the embedded cavity antenna embedded in the non-metallic foot pad structure 21 is not only based on the appearance requirements, but also includes the precise adjustment of the signal transmission direction and coverage range. Inside the non-metallic foot pad structure 21, the antenna body 1 is combined with multiple layers of materials to maximize the signal transmission effect. In particular, the antenna body 1 is not placed randomly in the non-metallic foot pad structure 21, but is precisely positioned through multiple isolation layers so that the performance of the antenna information can still be maintained in the interference environment of the metal shell.

[0068] Therefore, the embedded cavity antenna and electronic device provided by the embodiment of the present disclosure do not need to open additional windows on the outer shell or leave clearance for the antenna, so as to maintain the overall beauty of the device and improve the structural stability; the low-frequency 2.4GHz antenna signal can pass through the "resonant cavity" effect of the cavity layer 11, and the extremely small thickness dimension design makes the low-frequency 2.4GHz signal oscillate back and forth and strengthen it, and then radiate from the radiation port. While the cavity layer 11 enhances the signal, the cavity layer 11 also plays a shielding role, so that the outwardly radiated signal and the useless noise in the device system are effectively isolated.

[0069] In addition, the thickness of the cavity layer 11 itself is only set within 2 mm, which not only enhances the radiation of low-frequency antenna signals, but also does not occupy too much installation space, so it can be placed in the narrow gap under the battery of the device, making the installation and application of the embedded cavity antenna more flexible.

[0070] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0071] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. An embedded cavity antenna, which can be embedded in the housing foot pad of an electronic device, characterized in that: It comprises an antenna body (1); The antenna body (1) comprises a cavity layer (11) and a high-frequency branch layer (12) which are connected to each other; The cavity layer (11) comprises a semi-enclosed cavity and a monopole antenna body located in the semi-enclosed cavity; The high-frequency branch node layer (12) comprises a plurality of frequency band branches (121) connected to the monopole antenna body.

2. The embedded cavity antenna according to claim 1, characterized in that: The cavity layer (11) comprises a plurality of stacked PCB structures; A plurality of the PCB structures are also provided with conductive via structures (111); The monopole antenna body is arranged in the PCB structure and the via structure (111).

3. The embedded cavity antenna according to claim 2, characterized in that: The cavity layer (11) further comprises a grounding layer arranged on the upper and lower sides of the PCB structure; The two grounding layers and the via structure (111) together form the semi-enclosed cavity.

4. The embedded cavity antenna according to claim 2, characterized in that: The high-frequency branch node layer (12) is partially protruded along the thickness direction of the cavity layer (11) and is arranged below the cavity layer (11).

5. The embedded cavity antenna according to claim 4, characterized in that: The length, width and thickness of the cavity layer (11) does not exceed 60 mm×6 mm×2 mm; The length, width and thickness of the high-frequency branch node layer (12) does not exceed 9 mm×5 mm×2.5 mm.

6. The embedded cavity antenna according to claim 1, characterized in that: The high-frequency branch node layer (12) at least comprises frequency band branches (121) extending in two different directions and having different extension lengths; Furthermore, the resonance wavelength of each frequency band branch (121) is different.

7. The embedded cavity antenna according to claim 6, characterized in that: The high-frequency branch layer (12) is also provided with a reflection groove; The reflection groove is arranged at the peripheral edge of the high-frequency branch node layer (12) and is used to reflect the frequency band signals of each of the frequency band branches (121).

8. The embedded cavity antenna according to claim 5, characterized in that: The antenna body (1) also includes a signal isolation layer (13); The signal isolation layer (13) is arranged between the high-frequency branch layer (12) and the device housing, and is used to form a reflection layer in the signal transmission path.

9. An electronic device, characterized in that: It comprises a device body (2) and the embedded cavity antenna according to any one of claims 1 to 8; The metal bottom shell (22) of the device body (2) has a non-metallic foot pad structure (21) formed in a downward depression, the non-metallic foot pad structure (21) is used to place the high-frequency branch layer (12), and the metal bottom shell (22) is also provided with an opening slit (221); The cavity layer (11) in the antenna body (1) is correspondingly arranged on the inner side of the metal bottom shell (22), and the high-frequency branch node layer (12) is correspondingly arranged in the non-metallic foot pad structure (21) formed by the depression.

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