Cavity antenna test piece, cavity antenna finished product and electronic device

Abstract

The utility model relates to electronic equipment technical field, concretely relates to a cavity antenna test product, cavity antenna finished product and electronic equipment. The present application aims at solving the problem of complex debugging process, long time consumption and high cost of cavity antenna resonant frequency in prior art. For this, the cavity antenna test product of the present application forms the cavity by connecting the antenna body and the back plate, and sets the tuning plate in the cavity, the tuning plate has the tuning surface with adjustable area, directly changes the equivalent electrical parameter of the cavity by the area change of the tuning surface, and can debug the resonant frequency of the cavity antenna test product. Compared with the way of debugging resonant frequency by relying on the support in prior art, the present application can complete frequency tuning by simply adjusting the area of the tuning surface, not only can shorten the debugging period of the cavity antenna test product, but also significantly reduces the cost, has the obvious practicality and economy.

Description

Technical Field

[0001] This utility model relates to the field of electronic equipment technology, specifically to a cavity antenna prototype, a finished cavity antenna, and an electronic device. Background Technology

[0002] With the rapid development of information technology, electronic devices such as tablets and mobile phones are playing an increasingly important role in people's daily lives. Antennas, as a key component for wireless communication, directly affect the user's network experience. However, as electronic devices are increasingly miniaturized, thinner, and have higher screen-to-body ratios, the space available for antenna placement is shrinking. This is especially true in all-metal electronic devices, where seamless designs are often used for the all-metal back cover and frame to achieve aesthetic appeal. However, this design approach presents significant challenges to antenna placement. To meet communication performance requirements while maintaining the integrity of the electronic device's appearance, cavity antennas are typically used, utilizing the small area around the screen's black border to radiate electromagnetic waves.

[0003] In cavity antennas, the size of the resonant cavity is directly related to the antenna's resonant frequency. The size of the resonant cavity determines the resonant frequency position of the cavity antenna, and thus the antenna's operating frequency band. However, since the size of the resonant cavity in a cavity antenna is usually fixed, adjusting the resonant frequency typically requires adjusting the size of the support structure within the cavity antenna prototype during initial testing. While this adjustment method can optimize the frequency response to some extent, the support structure usually serves a supporting function within the cavity antenna. Changes in its size not only affect the overall structural stability of the cavity antenna but also, because it is an integrated structural component inside the cavity antenna, require redesigning the mold for replacement or modification. This results in a complex, time-consuming, and costly resonant frequency tuning process, making it difficult to meet the demands of rapid iteration and efficient tuning.

[0004] Accordingly, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0005] To address at least one of the aforementioned problems in the prior art, namely the complexity, time-consuming nature, and high cost of tuning the resonant frequency of cavity antennas, this application provides a cavity antenna prototype, comprising:

[0006] The antenna body and the back plate are connected to the back plate and together with the back plate form a cavity; the antenna body has a radiation port that communicates with the cavity.

[0007] A tuning board is disposed within the cavity and connected to both the antenna body and the backplate. The tuning board has a tuning surface with an adjustable area, and adjusting the area of ​​the tuning surface can cause a change in the resonant frequency of the cavity antenna sample.

[0008] In the preferred embodiment of the cavity antenna prototype described above, the number of tuning boards is at least one.

[0009] In the preferred technical solution of the above cavity antenna prototype, when the number of tuning plates is at least two, along the direction perpendicular to the tuning surface and pointing from the tuning surface to the away surface, the orthographic projection of any tuning plate does not cover or does not completely cover the orthographic projection of the other tuning plates.

[0010] The opposing surface is the surface on the tuning plate that is opposite to the tuning surface.

[0011] In the preferred embodiment of the above-mentioned cavity antenna prototype, the antenna body is made of a metallic material; or the antenna body is made of a non-metallic material, and a metallic layer is provided on its inner surface; and / or

[0012] The back panel is made of a metal material; or the back panel is made of a non-metal material, and its inner surface is provided with a metal layer; and / or

[0013] The tuning board is made of metal; or the surface of the tuning board is provided with a metal layer.

[0014] In the preferred embodiment of the above-mentioned cavity antenna prototype, the antenna body and the tuning board are integrally formed or fixedly connected; and / or

[0015] The tuning plate is abutted against or detachably fixedly connected to the back plate; or the tuning plate is abutted against or detachably fixedly connected to the back plate via a connecting plate disposed on its side near the back plate; and / or

[0016] The antenna body is detachably and fixedly connected to the back plate.

[0017] In the preferred embodiment of the cavity antenna prototype described above, a communication port is provided on the side of the antenna body facing away from the tuning surface.

[0018] In the preferred embodiment of the cavity antenna prototype described above, the orthographic projection of the tuning plate, along a direction perpendicular to the tuning surface and pointing from the tuning surface to the opposing surface, completely covers the orthographic projection of the connecting port.

[0019] In the preferred embodiment of the cavity antenna prototype described above, the cavity antenna further includes a support bracket disposed within the cavity and connected to both the antenna body and the backplate; and / or

[0020] The cavity antenna also includes a feeding structure disposed on the antenna body for feeding power to the cavity.

[0021] This application also provides a cavity antenna finished product, which is the cavity antenna prototype described in the above preferred technical solution having a tuning board with a tuning surface area that reaches the target area after adjustment.

[0022] This application also provides an electronic device, which includes the cavity antenna product described in the preferred technical solution above.

[0023] Those skilled in the art will understand that the cavity antenna prototype of this application forms a cavity by connecting the antenna body to a backplate, and a tuning plate is placed inside the cavity. The area of ​​the tuning surface in the tuning plate can be adjusted, and the equivalent electrical parameters of the cavity can be directly changed by utilizing the change in the area of ​​the tuning surface, thereby enabling the tuning of the resonant frequency of the cavity antenna prototype. Compared with the prior art that relies on a bracket to tune the resonant frequency, this application only needs to adjust the area of ​​the tuning surface in the tuning plate to complete the frequency tuning, which not only shortens the tuning cycle of the cavity antenna prototype, but also significantly reduces the cost, and has significant practicality and economy.

[0024] Furthermore, when there are at least two tuning boards, the orthographic projection of any tuning board does not cover or completely cover the orthographic projection of the other tuning boards in a direction perpendicular to the tuning surface and pointing from the tuning surface to the opposite surface. This allows each tuning board to adjust the resonant frequency of the cavity antenna test specimen, which is beneficial for the cavity antenna test specimen to reach the target tuning frequency.

[0025] Furthermore, by making the antenna body a metallic material, or by making the antenna body a non-metallic material with a metal layer on its inner surface; and / or by making the backplate a metallic material, or by making the backplate a non-metallic material with a metal layer on its inner surface, it is beneficial to form a cavity and improve the applicability of this application. In addition, making the tuning plate a metallic material, or by providing a metal layer on the surface of the tuning plate, facilitates adjusting the resonant frequency of the cavity antenna prototype by changing the area of ​​the tuning surface.

[0026] Furthermore, by setting a connection port on the side of the antenna body away from the tuning surface, not only can the integrity of electromagnetic shielding be maintained, but also the distribution of electromagnetic field within the cavity can be avoided.

[0027] Furthermore, by installing a support frame within the cavity, the cavity can be stabilized, thereby improving the stability of the cavity antenna prototype. Additionally, a feeding structure is incorporated into the antenna body to supply power to the cavity. Attached Figure Description

[0028] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0029] Figure 1 This is a cross-sectional view of the first embodiment of the electronic device of this application;

[0030] Figure 2 yes Figure 1 Enlarged view of the middle section;

[0031] Figure 3 This is a cross-sectional view of the second embodiment of the electronic device of this application;

[0032] Figure 4 yes Figure 3 Enlarged view of the middle section;

[0033] Figure 5 This is a structural diagram of the first embodiment of the cavity antenna prototype of this application;

[0034] Figure 6 yes Figure 5 A structural diagram showing a decrease in the area of ​​the tuning surface in the middle;

[0035] Figure 7 This is a structural diagram of the second embodiment of the cavity antenna prototype of this application;

[0036] Figure 8 This is a graph showing the variation of S11 parameters (reflection coefficient amplitude) with frequency for cavity antenna test specimens under different tuning board area configurations.

[0037] Figure 9 This is a graph showing the overall efficiency of the cavity antenna sample as a function of frequency under different tuning board area configurations.

[0038] The attached figures are labeled as follows:

[0039] 1. Cavity antenna prototype; 11. Antenna body; 111. First panel; 1111. Radiation port; 1112. Connecting port; 112. Second panel; 12. Tuning board; 121. First tuning board; 122. Second tuning board; 123. Tuning surface; 13. Connecting plate; 14. Back plate; 15. Feeding structure; 2. Housing; 3. Display screen; 4. Radiation slit; 5. Cavity; 6. Foam. Detailed Implementation

[0040] Preferred embodiments of this application will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application.

[0041] It should be noted that in the description of this application, the terms "upper", "lower", "inner", "top", "bottom", etc., indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0042] Furthermore, it should be noted that, in the description of this application, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; or they can refer to the internal communication 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.

[0043] To address the problems of complex, time-consuming, and costly tuning processes for cavity antenna resonant frequencies in existing technologies, this application provides an electronic device for testing, comprising a housing 2, a display screen 3, and a cavity antenna test piece 1. The display screen 3 is mounted on the housing 2, forming a receiving space for the cavity antenna test piece 1. A radiation slit 4 is provided at the mounting point of the display screen 3 and the housing 2, facilitating the cavity antenna's reception or radiation of electromagnetic waves. A tuning plate 12 is provided in the cavity antenna test piece 1. The area of ​​the tuning surface 123 in the tuning plate 12 is easily adjustable, thereby facilitating the tuning frequency tuning of the cavity antenna and enabling the cavity antenna test piece 1 to reach the target tuning frequency. This solves the problems of complex, time-consuming, and costly tuning processes for cavity antenna resonant frequencies in existing technologies. Furthermore, in conjunction with… Figure 1 The cavity antenna specimen 1 is described.

[0044] This application does not restrict the electronic device, as long as it can accommodate a cavity antenna. For example, the electronic device can be a mobile phone, tablet, etc.

[0045] The following is a reference to the appendix. Figure 1-7 The cavity antenna prototype 1 of this utility model is described below.

[0046] See Figure 1-2As shown in sections 5-7, the cavity antenna prototype 1 includes an antenna body 11 and a tuning plate 12. The antenna body 11 is rectangular and is formed by a large first panel 111 and three smaller second panels 112, creating a cavity with two open sides. The open ends of the antenna body 11 opposite to the first panel 111 correspond to the bottom surface of the housing 2, and the open ends of the antenna body 11 opposite to the second panels 112 correspond to the side walls of the housing 2. This allows the antenna body 11, when mounted on the housing 2 using conductive cotton, to form a cavity together with the housing 2. The conductive cotton is foam 6. This portion of the housing 2 that forms the cavity with the antenna body 11 serves as the backplate 14 of the cavity antenna prototype 1. Both the antenna body 11 and the housing 2 are made of metal; therefore, the cavity is a cavity 5. The antenna body 11 has a radiation port 1111, which corresponds to the radiation slit 4 along the thickness direction of the electronic device, thus facilitating the reception or radiation of electromagnetic waves.

[0047] Of course, the configuration of the cavity 5 is not fixed in this application, and those skilled in the art can adjust it as needed. For example, the antenna body 11 may be made of a non-metallic material, and a metal layer may be provided on the inner surface of the antenna body 11, which also facilitates the formation of the cavity 5 between the antenna body 11 and the back plate 14. Alternatively, the housing 2 may be made of a non-metallic material, and a metal layer may be provided on the inner surface of the housing 2. Alternatively, both the antenna body 11 and the housing 2 may be made of non-metallic materials, and metal layers may be provided on the inner surfaces of both the antenna body 11 and the housing 2. It should be noted that this application may also use a dedicated back plate 14 to connect with the antenna body 11 and form the cavity 5, such as... Figure 3-4 As shown.

[0048] Furthermore, the arrangement of the antenna body 11 in this application is not fixed, and those skilled in the art can adjust it as needed. For example, the antenna body 11 can also be formed by a first panel 111 and four second panels 112 to create a cuboid structure with an inner cavity and one open side. In this case, a dedicated back surface or a portion of the bottom surface of the housing 2 can be used as a back plate 14 to connect with the antenna body 11 and form a cavity 5. In addition, the antenna body 11 in this application can be in other shapes besides cuboid, as long as it can form a cavity 5 with the back plate 14. For example, the antenna body 11 can also be cylindrical, or other regular or irregular shapes.

[0049] See next Figure 1-7, the tuning plate 12 is disposed within the cavity 5 and is made of a metallic material. One end of the tuning plate 12 is integrally formed with the first panel 111, and the other end is provided with a connecting plate 13 which is integrally formed with the tuning plate 12. The connecting plate 13 is connected to the bottom surface of the back plate 14 through a foam 6. The tuning plate 12 can interfere with the electromagnetic field distribution within the cavity 5 to form a new electromagnetic field, thereby changing the tuning frequency of the cavity antenna sample 1. Therefore, in order to adjust the tuning frequency of the cavity antenna sample 1, the tuning plate 12 and the antenna body 11 need to be removed from the back plate 14, and then the area of the tuning surface 123 in the tuning plate 12 is changed by cutting or other means. The change in the area of the tuning surface 123 directly changes the electromagnetic field distribution within the cavity 5, thereby achieving the purpose of adjusting the tuning frequency of the cavity antenna sample 1.

[0050] Among them, in combination with Figure 5 , the tuning plate 12 and the connecting plate 13 were originally part of the antenna body 11. A reverse "匚"-shaped cutting line was formed on the antenna body 11 by cutting or other means, and the area surrounded by the cutting line was first folded towards the bottom surface of the housing 2 to form a folding plate, and the part of the folding plate close to the housing 2 was secondarily folded towards the first panel 111 to form the tuning plate 12 and the connecting plate 13. At this time, due to the absence of the tuning plate 12 and the connecting plate 13, a communication port 1112 is formed on the first panel 111. The communication port 1112 is located on the side of the tuning plate 12 facing away from the radiation port 1111, which can avoid disturbing the electromagnetic field distribution within the cavity 5.

[0051] It should be noted that the tuning plate 12 and the connecting plate 13 can also be connected by welding, bonding or other means. At this time, the communication port 1112 can be provided or not provided on the first panel 111. When the communication port 1112 is provided, along the direction perpendicular to the tuning surface 123 and pointing from the tuning surface 123 to the back surface, the orthographic projection of the communication port 1112 needs to be completely covered by the orthographic projection of the tuning plate 12 in the same direction. Among them, the back surface and the tuning surface 123 are arranged on both sides of the tuning plate 12 and are arranged opposite to each other.

[0052] Of course, the connection method of the tuning plate 12 and the antenna body 11 and the connection method of the connecting plate 13 and the housing 2 in the present application are not fixed, and those skilled in the art can adjust according to needs. For example, the tuning plate 12 is fixedly connected to the antenna body 11 through a foam 6. And / or, the connecting plate 13 abuts against the bottom surface of the housing 2. In addition, the material of the tuning plate 12 provided in the present application is not fixed, and those skilled in the art can adjust according to needs. For example, the tuning plate 12 can also be a non-metallic material, and in this case, a metal layer is provided on the surface of the tuning plate 12. Additionally, in other preferred embodiments, the provision of the connecting plate 13 is not necessary, and those skilled in the art can select according to needs. In the case where the connecting plate 13 is not provided, such as Figure 7 As shown, the tuning plate 12 is directly abutted against the housing 2 or fixedly connected by the foam 6.

[0053] See next Figure 1-6 There are two tuning boards 12, namely a first tuning board 121 and a second tuning board 122. There are also two connecting boards 13, respectively mounted on the first tuning board 121 and the second tuning board 122. The first tuning board 121 is located along the length of the antenna body 11 (e.g., along the length of the antenna body 11). Figure 1 The second tuning plate 122 extends along the width direction of the antenna body 11 (as shown in the X direction), and extends along the X direction. Figure 1 The first tuning plate 121 extends in the Y direction shown, and the two are spaced apart along the length of the antenna body 11. The tuning surface of the first tuning plate 121 faces the radiation port 1111 and is formed by the length direction and the height direction. The tuning surface of the second tuning plate 122 faces the radiation port 1111 and is formed by the width direction and the height direction. The connecting plate 13 on the first tuning plate 121 is connected to the bottom surface of the housing 2 by foam 6, and the connecting plate 13 on the second tuning plate 122 is connected to the bottom surface of the housing 2 by foam 6, so that both the first tuning plate 121 and the second tuning plate 122 can be removed from the housing 2 along with the antenna body 11. The area of ​​the tuning surface 123 in the first tuning plate 121 can be changed by cutting the first tuning plate 121, thereby changing the tuning frequency of the cavity antenna prototype 1.

[0054] In this application, the area refers to the product of the length and width dimensions, excluding the thickness. The thickness of the tuning plate 12 in this application is relatively small, and its impact on the resonant frequency is negligible. Furthermore, using a thinner tuning plate 12 not only reduces costs but also facilitates altering the area of ​​the tuning surface 123 through cutting or other methods, making the tuning process of the cavity antenna prototype 1 simpler and more efficient. Taking the first tuning plate 121 as an example, the length of the first tuning plate 121 refers to... Figure 5-7 The dimensions shown in the X direction, the width dimension refers to Figure 5-7 The dimensions shown are in the Z direction. Taking the second tuning plate 122 as an example, the length dimension of the second tuning plate 122 refers to... Figure 5-7 The dimensions shown in the Y direction, the width dimension refers to Figure 5-7 The dimensions in the Z direction are shown. Furthermore, this application can not only change the area of ​​the tuning surface 123 in the first tuning plate 121 by cutting the first tuning plate 121, but also change the area of ​​the tuning surface 123 in the second tuning plate 122 by cutting the second tuning plate 122 simultaneously or separately.

[0055] Of course, the number of tuning boards 12 is not fixed in this application, and those skilled in the art can adjust it as needed. For example, the number of tuning boards 12 can be one, three, or other numbers. When there is one tuning board 12, it can extend along the length of the antenna body 11, or along the width of the antenna body 11, or at any angle. When there are two or more tuning boards 12, they can all extend along the length of the antenna body 11 and be spaced apart; or they can all extend along the width of the antenna body 11 and be spaced apart; or they can be divided into two parts, such as... Figure 7 As shown, a portion of the tuning plates 12 extend along the length of the antenna body 11 and are spaced apart, while another portion of the tuning plates 12 extend along the width of the antenna body 11 and are spaced apart. This ensures that, along the direction perpendicular to the tuning surface 123 and pointing from the tuning surface 123 towards the opposite surface, the orthographic projection of the tuning plate 12 completely covers the orthographic projection of the connecting port 1112 in the same direction, and the orthographic projection of any tuning plate 12 does not cover or only partially covers the orthographic projection of the remaining tuning plates 12 in the same direction.

[0056] See also Figure 1-4 The cavity antenna prototype 1 also includes a support (not shown in the figure) and a feeding structure 15. The support is an insulated support, which is disposed inside the cavity 5 and connected to the bottom surface of the back plate 14 and the first panel of the antenna body 11, respectively, so that the support can play a supporting role and improve the stability and safety of the cavity antenna. The feeding structure 15 is disposed on the antenna body 11 located outside the cavity 5 and is used to feed power to the cavity 5.

[0057] It should be noted that the power supply structure 15 can also be located on the antenna body 11 outside the cavity 5, which can also supply power to the cavity 5. It should also be noted that in other preferred embodiments, the support structure is not mandatory, and those skilled in the art can choose to install it as needed.

[0058] Combination Figure 1-6 The method for adjusting the tuning frequency of the cavity antenna prototype 1 of this application by changing the area of ​​the tuning surface 123 in the first tuning plate 121 is described.

[0059] Before cutting the first tuning plate 121, the tuning frequency of the cavity antenna specimen 1 mounted on the housing 2 is tested to obtain the first tuning frequency. Next, after removing the antenna body 11 and tuning plate 12 from the housing 2, half the length of the first tuning plate 121 is cut off, halving its length and consequently halving the area of ​​the tuning surface 123. After halving the area of ​​the tuning surface 123, the antenna body 11 and the first and second tuning plates are reinstalled in their original positions on the housing 2, and the tuning frequency of the cavity antenna specimen 1 is tested again to obtain the second tuning frequency. If the second tuning frequency does not reach the target tuning frequency, the area of ​​the tuning surface 123 in the first tuning plate 121 and / or the area of ​​the tuning surface 123 in the second tuning plate 122 must be changed according to the above steps. If the second tuning frequency reaches the target tuning board 12, it indicates that the cavity antenna prototype 1 containing a tuning board with half the area of ​​the tuning surface 123 meets the requirements and can be used for subsequent production operations.

[0060] Figure 5 and Figure 6 Taking cavity antenna prototype 1 as an example, and combining it with Figure 8 The curves showing the S11 parameter (reflection coefficient amplitude) versus frequency when the area of ​​the tuning surface 123 in the first tuning plate 121 is 0%, 50%, and 100% respectively show that the resonant frequency position is different when the area of ​​the tuning surface 123 is different. Therefore, changing the area of ​​the tuning surface 123 can cause the resonant frequency of the cavity antenna test specimen 1 to change. This method of adjusting the resonant frequency of the cavity antenna test specimen 1 based on the adjustment of the area of ​​the tuning surface 123 can achieve the target resonant frequency without changing the main structure of the antenna. Furthermore, through... Figure 9 It can be seen that although the resonant frequency varies with the area of ​​the tuning surface 123, the overall efficiency remains constant. Therefore, the cavity antenna prototype 1 of this application can maintain the stability of radiation efficiency during resonant frequency tuning. 100% area refers to... Figure 5 The area of ​​tuning surface 123 in the first tuning plate 121, 50% of the area refers to Figure 6 The area of ​​the tuning surface 123 in the first tuning plate 121, where 0% of the area refers to the area relative to... Figure 5 and Figure 6 The first tuning plate 121 is not installed in cavity 5.

[0061] When the area of ​​the tuning surface 123 in the tuning plate 12 is adjusted to reach the target area, the cavity antenna test specimen 1 obtained has a resonant frequency that reaches the target resonant frequency. At this time, the cavity antenna test specimen 1 can be used as the finished cavity antenna. Therefore, the finished cavity antenna of this utility model is described in conjunction with the above.

[0062] Compared to the cavity antenna prototype 1, the finished cavity antenna of this application also has an antenna body 11, a back plate 14, a tuning plate 12, a support, and a feeding structure 15. The antenna body 11, back plate 14, support, and feeding structure 15 are completely identical to those of the cavity antenna prototype 1, and will not be described in detail here. The tuning plate 12 in the finished cavity antenna is the tuning plate 12 obtained after the area of ​​the tuning surface 123 in the cavity antenna prototype 1 reaches the target area, not the tuning plate 12 in the cavity antenna prototype 1 before debugging or the tuning plate 12 when the area of ​​the tuning surface 123 did not reach the target area during debugging. For example, when the second tuning frequency reaches the target tuning frequency as mentioned above, the tuning plate 12 in the finished cavity antenna is the tuning plate 12 with its length halved in the cavity antenna prototype 1.

[0063] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, any of the claimed embodiments in the claims of this application can be used in any combination.

[0064] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A cavity antenna prototype, characterized in that, The cavity antenna test specimen includes: The antenna body and the back plate are connected to the back plate and together with the back plate form a cavity; the antenna body has a radiation port that communicates with the cavity. A tuning board is disposed within the cavity and connected to both the antenna body and the backplate. The tuning board has a tuning surface with an adjustable area, and adjusting the area of ​​the tuning surface can cause a change in the resonant frequency of the cavity antenna sample.

2. The cavity antenna prototype according to claim 1, characterized in that, The number of tuning boards is at least one.

3. The cavity antenna prototype according to claim 2, characterized in that, When there are at least two tuning boards, along a direction perpendicular to the tuning surface and pointing from the tuning surface to the opposite surface, the orthographic projection of any one of the tuning boards does not cover or completely cover the orthographic projections of the other tuning boards. The opposing surface is the surface on the tuning plate that is opposite to the tuning surface.

4. The cavity antenna prototype according to claim 1, characterized in that, The antenna body is made of a metallic material; or the antenna body is made of a non-metallic material, with a metallic layer on its inner surface; and / or The back panel is made of a metal material; or the back panel is made of a non-metal material, and its inner surface is provided with a metal layer; and / or The tuning board is made of metal; or the surface of the tuning board is provided with a metal layer.

5. The cavity antenna prototype according to claim 1, characterized in that, The antenna body is integrally formed with or fixedly connected to the tuning board; and / or The tuning plate is abutted against or detachably fixedly connected to the back plate; or the tuning plate is abutted against or detachably fixedly connected to the back plate via a connecting plate disposed on its side near the back plate; and / or The antenna body is detachably and fixedly connected to the back plate.

6. The cavity antenna prototype according to claim 1, characterized in that, A communication port is provided on the side of the antenna body that is away from the tuning surface.

7. The cavity antenna prototype according to claim 6, characterized in that, Along a direction perpendicular to the tuning surface and pointing from the tuning surface toward the opposing surface, the orthographic projection of the tuning plate completely covers the orthographic projection of the connecting port.

8. The cavity antenna prototype according to claim 1, characterized in that, The cavity antenna prototype also includes a support, which is disposed within the cavity and connected to both the antenna body and the backplate; and / or The cavity antenna prototype also includes a feeding structure disposed on the antenna body for feeding power to the cavity.

9. A cavity antenna product, characterized in that, The cavity antenna finished product is a cavity antenna prototype according to any one of claims 1-8, which has a tuning plate with a tuning surface area that reaches the target area after adjustment.

10. An electronic device, characterized in that, The electronic device includes the cavity antenna product of claim 9.

Images