Antenna coupled electrical conductor and radio frequency device

Abstract

The application belongs to the technical field of communication, and particularly relates to an antenna coupling electric conductor. The antenna coupling electric conductor comprises an antenna coupling branch and a ground coupling branch. The antenna coupling electric conductor is used for coupling tuning of a target wireless module. The target wireless module comprises a radio frequency module and an antenna. The antenna coupling branch and the ground coupling branch are both metal sheets. During coupling tuning, the antenna coupling branch is coupled with the antenna, and the ground coupling branch is coupled with the ground of the radio frequency module. The projection of the antenna coupling branch on the plane where the antenna is located and the projection of the ground coupling branch on the plane where the antenna is located have a spacing area. Part of the spacing area is located in the antenna area. The application can solve the problem that the existing technology is difficult to adjust the antenna resonance frequency and amplitude of a fixed wireless module.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of communication, and particularly relates to an antenna coupling electric conductor and a radio frequency device. BACKGROUND

[0002] The wireless module integrates a radio frequency module and an antenna, and with the development of miniaturization and integration, the wireless module is applied more and more widely. At present, the scheme integrator often directly integrates the wireless module in the product to perform intelligent design, and the same wireless module can be applied to different products. However, the radiation performance of the antenna is closely related to the spatial layout in the product, and different products often have different spatial layouts. If the antenna cannot be well matched with the spatial layout in the product, the wireless performance cannot be good.

[0003] For example, the module antenna will produce frequency deviation due to the influence of the driven PCB, the product shell, the surrounding electronic components and the like, resulting in performance degradation. The prior art cannot adjust the resonance frequency and amplitude of the antenna. SUMMARY

[0004] Therefore, the embodiment of the present application provides an antenna coupling electric conductor and a radio frequency device to solve the problem that the resonance frequency and amplitude of the antenna of the wireless module cannot be adjusted in the prior art.

[0005] The first aspect of the embodiment of the present application provides an antenna coupling electric conductor, which comprises:

[0006] an antenna coupling branch and a ground coupling branch;

[0007] The antenna coupling electric conductor is used for coupling tuning of a target wireless module; the target wireless module comprises a radio frequency module and an antenna, and the antenna coupling branch and the ground coupling branch are both metal sheets; during the coupling tuning, the antenna coupling branch is coupled with the antenna, the ground coupling branch is coupled with the ground of the radio frequency module, the projection of the antenna coupling branch on the plane where the antenna is located and the projection of the ground coupling branch on the plane where the antenna is located have a spacing region, and the spacing region is partially located in the antenna region.

[0008] Optionally, the coupling of the antenna coupling branch with the antenna comprises:

[0009] the antenna coupling branch is connected with the antenna;

[0010] Alternatively, the partial projection of the antenna coupling branch on the plane where the antenna is located is located in the antenna region, and a first coupling region exists in the partial antenna coupling branch corresponding to the partial projection, and the spacing between the first coupling region and the plane where the antenna is located is not greater than a preset distance.

[0011] Optionally, the coupling of the ground coupling branch with the ground of the radio frequency module comprises:

[0012] The ground coupling branch is connected with the ground of the radio frequency module;

[0013] Alternatively, a part of the ground coupling branch projects on a plane where the ground of the radio frequency module is located, and the part of the projection is located in a ground area of the radio frequency module, and a second coupling area exists in the part of the ground coupling branch corresponding to the part of the projection, and a distance between the second coupling area and the plane where the ground of the radio frequency module is located is not greater than a preset distance.

[0014] Optionally, the antenna coupling branch and the ground coupling branch are not connected.

[0015] Alternatively, the antenna coupling branch and the ground coupling branch are connected through at least one connecting structure, and the connecting structure is any one of a conductor, an inductor or a capacitor.

[0016] Optionally, a perimeter of the antenna coupling branch is not less than λ g / 4, and λ g is an equivalent spatial wavelength in a medium related to a dielectric constant ε.

[0017] Optionally, the preset distance is λ g / 10, and λ g is an equivalent spatial wavelength in a medium related to a dielectric constant ε.

[0018] A second aspect of the embodiment of the application provides a radio frequency device, comprising a wireless module and an antenna coupling electric conductor as in the first aspect.

[0019] The wireless module is an independent module integrated with the radio frequency module and the antenna.

[0020] Optionally, the antenna is any one of a PCB antenna, an SMD patch antenna, a ceramic antenna, a metal wire antenna or a metal stamping piece antenna.

[0021] A third aspect of the embodiment of the application provides a radio frequency device, comprising a wireless module and an antenna coupling electric conductor as in the first aspect.

[0022] The radio frequency module and the antenna of the wireless module are independently arranged and connected through a microstrip line or a coaxial line, and the radio frequency module is an independent module or a radio frequency circuit integrated on a driving PCB of the wireless module.

[0023] Optionally, the antenna is any one of a PCB antenna, an SMD patch antenna, a ceramic antenna, a metal wire antenna or a metal stamping piece antenna.

[0024] Compared with the prior art, the embodiment of the application has the following beneficial effects:

[0025] The embodiment of the present application solves the problem that when the wireless module is applied to different products, the resonant frequency and amplitude cannot be adjusted due to the antenna being fixed, which results in the antenna failing to achieve the best matching with the product and causing performance deterioration, by coupling and tuning the antenna of the wireless module through the antenna coupling branch and the ground coupling branch. The antenna coupling electric conductor provided by the embodiment of the present application is simple in structure and can be applied to various forms of wireless modules, which improves the compatibility and multiplexing rate of the wireless module while ensuring the performance and reducing the development cost. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0027] Figure 1 is a mounting schematic of the existing wireless module provided by the embodiment of the present application Figure 1 ;

[0028] Figure 2 is a mounting schematic of the existing wireless module provided by the embodiment of the present application Figure 2 ;

[0029] Figure 3 is a schematic diagram of the wireless module and the antenna coupling electric conductor provided by the embodiment of the present application

[0030] Figure 4 is a schematic diagram of the antenna coupling electric conductor provided by the embodiment of the present application

[0031] Figure 5 is a schematic diagram of the wireless module and the antenna coupling electric conductor provided by the embodiment of the present application

[0032] Figure 6 is a schematic diagram of the wireless module and the antenna coupling electric conductor provided by the embodiment of the present application

[0033] Figure 7 is a schematic diagram of the antenna coupling electric conductor provided by the embodiment of the present application

[0034] Figure 8 is a structural schematic diagram of a monopole antenna provided by the embodiment of the present application

[0035] Figure 9 is a coupling principle schematic diagram of a monopole antenna provided by the embodiment of the present application

[0036] Figure 10 is a structural schematic diagram of an IFA antenna provided by the embodiment of the present application

[0037] Figure 11 is a coupling principle diagram of an IFA antenna provided by an embodiment of the present application;

[0038] Figure 12 is a coupling principle diagram of an IFA antenna provided by an embodiment of the present application;

[0039] Figure 13 is a mounting position diagram of an antenna coupling electric conductor provided by an embodiment of the present application;

[0040] Figure 14 is a resonance frequency diagram of an antenna provided by an embodiment of the present application. DETAILED DESCRIPTION

[0041] In the following description, for the purpose of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc., in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

[0042] In order to illustrate the technical solutions of the present application, the following will be described by specific embodiments.

[0043] In order to more clearly understand the present application, a brief introduction to the prior art is first given:

[0044] In order to facilitate the connection and interaction of the wireless module and the electronic drive, the application module is often pasted on the drive PCB by SMT patch or plugged into the drive PCB by plug-in. The SMT integrated solution of the module antenna, the drive PCB is added below the antenna, which will cause the original antenna resonance frequency to deviate from the working frequency point, the resonance amplitude is low, and the performance is decreased.

[0045] In view of this, the module supplier proposes an improved way, that is, to hollow the PCB around the antenna to reduce the influence of the PCB on the antenna, as shown in Figure 1 However, referring to Figure 2 , the antenna is affected not only by the drive PCB, but also by other factors such as product shell, surrounding electronic components, etc., and there is still a frequency deviation. When the antenna is affected by other factors to cause frequency deviation, the antenna resonance frequency cannot be adjusted back to the working frequency point.

[0046] The present embodiment provides an antenna coupling electric conductor, comprising: an antenna coupling branch and a ground coupling branch.

[0047] The antenna coupling electric conductor is used for coupling and tuning a target wireless module.

[0048] The target wireless module comprises a radio frequency module and an antenna, and the antenna coupling branch and the ground coupling branch are both metal sheets. During coupling tuning, the antenna coupling branch is coupled with the antenna, the ground coupling branch is coupled with the ground of the radio frequency module, the projection of the antenna coupling branch on the plane where the antenna is located and the projection of the ground coupling branch on the plane where the antenna is located have a spacing area, and the spacing area is partially located in the antenna area.

[0049] In the embodiment of the present application, the antenna coupling branch can be a metal sheet of any shape, such as a rectangular, circular, circular ring or any irregular shape.

[0050] As a possible implementation, the coupling of the antenna coupling branch with the antenna comprises:

[0051] The antenna coupling branch is connected with the antenna.

[0052] Alternatively, the partial projection of the antenna coupling branch on the plane where the antenna is located is located in the antenna area, and the first coupling area exists in the part of the antenna coupling branch corresponding to the partial projection, and the spacing between the first coupling area and the plane where the antenna is located is not greater than a preset distance.

[0053] As a possible implementation, the coupling of the ground coupling branch with the ground of the radio frequency module comprises:

[0054] The ground coupling branch is connected with the ground of the radio frequency module.

[0055] Alternatively, the partial projection of the ground coupling branch on the plane where the ground of the radio frequency module is located is located in the ground area of the radio frequency module, and the second coupling area exists in the part of the ground coupling branch corresponding to the partial projection, and the spacing between the second coupling area and the plane where the ground of the radio frequency module is located is not greater than a preset distance.

[0056] For example:

[0057] In one embodiment, as shown in Figure 3 and Figure 4 The wireless module is an independent module integrated by the radio frequency module and the antenna, and the independent module is used for plugging into the drive PCB for wireless signal transmission, so that the antenna coupling branch and the ground coupling branch can both be independent metal sheets. The ground coupling branch and the antenna coupling branch are separated by a certain distance, and can be connected through at least one connecting structure, which can be but is not limited to any one of a conductor, an inductor or a capacitor. Among them, the above-mentioned metal sheets can be planar or curved, the antenna coupling branch needs to correspond to the position of the antenna and cannot be too far away to ensure that the antenna coupling branch can be coupled, and the coupling effect is optimal when the two are parallel. Similarly, the ground coupling branch needs to correspond to the position of the ground plate of the radio frequency module and cannot be too far away. Part of the spacing area between the antenna coupling branch and the ground coupling branch needs to be covered by the antenna to ensure that electromagnetic coupling can be performed.

[0058] In another embodiment, the RF module and the antenna in the wireless module are independently arranged and connected through a microstrip line or a coaxial line. The RF module is an independent module as shown in Figure 5 , or the RF module is an integrated RF circuit on the driving PCB as shown in Figure 6 . At this time, since the ground of the RF module is connected with the ground of the driving PCB, the ground plate of the driving PCB can be directly used as the ground coupling branch.

[0059] Further, for different wireless modules or different adjustment requirements, the antenna coupling branch and the ground coupling branch can be combined into various forms, Figure 6 several common forms (a)-(j) are shown. Regardless of the form, the antenna coupling conductor must satisfy the following conditions:

[0060] The antenna coupling branch and the antenna are coupled, and / or the ground coupling branch and the ground of the RF module are coupled. There is a spacing area between the projection of the antenna coupling branch on the plane where the antenna is located and the projection of the ground coupling branch on the plane where the antenna is located. The spacing area is partially located in the antenna area.

[0061] Specifically, whether the antenna coupling branch and the ground coupling branch are connected and the form and number of the connection structure are related to the resonant frequency and amplitude to be adjusted, as follows:

[0062] The number and position of the connection points in the antenna coupling branch are changed, and then the antenna resonant point and amplitude are changed.

[0063] For example, Figure 8 a single-feed-point antenna as shown in. Referring to Figure 9 , the coupling directly forms an electrical connection path 1 with the single-feed-point module antenna, and a new resonant point is adjusted. The longer the loop path, the lower the frequency. When the antenna coupling branch is long enough, an electrical connection path 2 is formed, and a new resonant point can also be adjusted.

[0064] Or, as shown in Figure 10 IFA antenna. Referring to Figure 11 , there is no grounding point between the connection point and the feed point, so the coupling directly forms a current path 1 with the IFA antenna. The current path is lengthened to adjust the resonant point to shift low. The current path 2 can be used to adjust the resonant frequency point to shift high and low. Referring to Figure 12 , there is a grounding point between the connection point and the feed point. The electrical connection path 1 is lengthened, which can significantly adjust the resonant point to shift low. The current path 2 can only fine-tune the resonant point due to the presence of the intermediate grounding point, but can significantly adjust the amplitude. When the antenna coupling branch and the ground coupling branch are not connected, the frequency is mainly adjusted to shift low, and the amplitude is adjusted. The resonant frequency increases as the circumference of the antenna coupling branch shortens.

[0065] As can be seen, the embodiments of the present invention couple and tune the antenna of the wireless module through antenna coupling stubs and ground coupling stubs, solving the problem that when the wireless module is applied to different products, the resonant frequency and amplitude cannot be adjusted due to the fixed antenna design, resulting in the antenna not achieving optimal matching with the product and causing performance degradation. The antenna coupling conductor structure provided by the embodiments of the present invention is simple and can be applied to various types of wireless modules, improving the compatibility and reusability of the wireless module while ensuring performance and reducing development costs.

[0066] As one possible implementation, the perimeter of the antenna coupling stub is not less than λg / 4, and the preset distance is λg / 10. g The equivalent spatial wavelength in the medium is related to the dielectric constant ε.

[0067] For example, for Figure 3 In the scenario shown, the medium is air, so the dielectric constant is approximately 1.

[0068] For example, for Figure 5 , Figure 6 In the scenario shown, if the medium is plastic or an outwardly extending PCB board, then the dielectric constant is the dielectric constant of the plastic or the PCB board.

[0069] Figure 13 The mounting position of an antenna coupling conductor in a solid structure is shown. Figure 14 The frequency curves for coupling tuning using an antenna-coupled conductor and for coupling tuning without an antenna-coupled conductor are shown. Comparing the two curves, it can be seen that the antenna-coupled conductor adjusted the resonant point from 2.2 GHz to 2.4 GHz.

[0070] This invention, without altering the original antenna, allows for readjustment of the antenna's resonant frequency and amplitude, achieving optimal matching between the wireless module and different products, resulting in superior radiation performance. This solves the problem of performance degradation caused by the inability to achieve optimal matching when wireless modules are used in different products due to the fixed antenna design. The antenna coupling conductor structure of this invention is simple, small in size, and low in cost. Its form and carrier are not limited; it can be implemented using copper plating on a PCB, facilitating assembly and manufacturing. In terms of wireless performance, it overcomes the compatibility bottleneck between wireless modules applied to different products.

[0071] This invention also provides a radio frequency (RF) device, including: an RF module, an antenna, and an antenna coupling conductor as described above; wherein the wireless module is an independent module integrating the RF module and the antenna, for example... Figure 3 The wireless module shown. As one possible implementation, the antenna can be any one of the following: PCB antenna, SMD patch antenna, ceramic antenna, metal wire antenna, or metal stamping antenna.

[0072] The radio frequency device according to an embodiment of the present application comprises: a radio frequency module, an antenna, and an antenna coupling electric conductor as described above; wherein the radio frequency module and the antenna are independently arranged and connected through a microstrip line or a coaxial line, and the radio frequency module is an independent module or a radio frequency circuit integrated on a driving PCB of a wireless module, such as the wireless module shown in FIG. 2. Figure 5 or Figure 6 As a possible implementation, the antenna is any one of a PCB antenna, an SMD patch antenna, a ceramic antenna, a metal wire antenna, and a metal stamping antenna.

[0073] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. An antenna coupling conductor, characterized in that, include: Antenna coupling stubs and ground coupling stubs; The antenna coupling conductor is used for coupling and tuning the target wireless module; The target wireless module includes a radio frequency module and an antenna, wherein the antenna coupling stub and the ground coupling stub are both metal sheets; During coupling tuning, the antenna coupling stub is coupled to the antenna, the ground coupling stub is coupled to the ground of the RF module, and there is a gap between the projection of the antenna coupling stub on the plane where the antenna is located and the projection of the ground coupling stub on the plane where the antenna is located, and the gap is partially located within the antenna area.

2. The antenna coupling conductor as described in claim 1, characterized in that, The antenna coupling stub is coupled to the antenna, including: The antenna coupling stub is connected to the antenna; Alternatively, a portion of the projection of the antenna coupling stub onto the plane where the antenna is located is within the antenna region, and a first coupling region exists in the portion of the antenna coupling stub corresponding to this portion of the projection, wherein the distance between the first coupling region and the plane where the antenna is located is not greater than a preset distance.

3. The antenna coupling conductor as described in claim 1, characterized in that, The ground coupling stub and the ground coupling of the radio frequency module include: The ground coupling stub is connected to the ground of the radio frequency module; Alternatively, the partial projection of the ground coupling stub onto the ground plane of the RF module is located within the ground region of the RF module, and a second coupling region exists in the partial ground coupling stub corresponding to this partial projection, wherein the distance between the second coupling region and the ground plane of the RF module is not greater than a preset distance.

4. The antenna coupling conductor as described in claim 1, characterized in that, There is no connection between the antenna coupling stub and the ground coupling stub; Alternatively, the antenna coupling stub and the ground coupling stub are connected by at least one connection structure, which is any one of a conductor, an inductor, or a capacitor.

5. The antenna coupling conductor as described in claim 1, characterized in that, The perimeter of the antenna coupling stub is not less than λ. g / 4,λ g The equivalent spatial wavelength in the medium is related to the dielectric constant ε.

6. The antenna coupling conductor as described in claim 2 or 3, characterized in that, The preset distance is λ g / 10, λ g The equivalent spatial wavelength in the medium is related to the dielectric constant ε.

7. A radio frequency device, characterized in that, include: The wireless module and the antenna-coupled electrical conductor as described in any one of claims 1-6; The wireless module is an independent module that integrates a radio frequency module and an antenna.

8. The radio frequency device as claimed in claim 7, characterized in that, The antenna can be any one of the following: PCB antenna, SMD patch antenna, ceramic antenna, metal wire antenna, or metal stamping antenna.

9. A radio frequency device, characterized in that, include: The wireless module and the antenna-coupled electrical conductor as described in any one of claims 1-6; The radio frequency module and antenna of the wireless module are set independently and connected by microstrip lines or coaxial lines. The radio frequency module is an independent module or a radio frequency circuit integrated on the driving PCB of the wireless module.

10. The radio frequency device as claimed in claim 9, characterized in that, The antenna can be any one of the following: PCB antenna, SMD patch antenna, ceramic antenna, metal wire antenna, or metal stamping antenna.

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