CN115064871A - Antenna coupling electric conductor and radio frequency device - Google Patents
Antenna coupling electric conductor and radio frequency device Download PDFInfo
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- CN115064871A CN115064871A CN202210644320.5A CN202210644320A CN115064871A CN 115064871 A CN115064871 A CN 115064871A CN 202210644320 A CN202210644320 A CN 202210644320A CN 115064871 A CN115064871 A CN 115064871A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
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Abstract
The invention is applicable to the technical field of communication, and particularly relates to an antenna coupling electric conductor. The antenna coupling electrical conductor includes: the antenna coupling branch and the ground coupling branch; the antenna coupling electric conductor is used for coupling and tuning the 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; when the antenna is coupled and tuned, the antenna coupling branch is coupled with the antenna, the ground coupling branch is coupled with the ground of the radio frequency module, a distance area exists 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, and the distance area is partially located in the antenna area. The invention can solve the problem that the prior art is difficult to adjust the resonant frequency and amplitude of the antenna of the shaped wireless module.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to an antenna coupling electric conductor and a radio frequency device.
Background
The wireless module integrates the radio frequency module and the antenna, and along with the development of miniaturization and integration trend, the application of the wireless module is more and more extensive. At present, scheme integrators often directly integrate wireless modules in products for 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, different products often have different spatial layouts, and if the antenna cannot be well matched with the spatial layout in the product, good wireless performance cannot be achieved.
For example, under the influence of a driver PCB, a product housing, surrounding electronic components, and the like, a frequency offset may be generated in a module antenna, resulting in performance degradation, and the prior art cannot adjust the resonant frequency and amplitude of the antenna.
Disclosure of Invention
In view of this, embodiments of the present invention provide an antenna coupling electrical conductor and a radio frequency device, so as to solve the problem in the prior art that it is difficult to adjust the resonant frequency and amplitude of the antenna of the wireless module.
A first aspect of an embodiment of the present invention provides an antenna coupling electrical conductor, including:
the antenna coupling branch and the ground coupling branch;
the antenna coupling electric conductor is used for coupling and tuning the 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 metal sheets; when the antenna coupling branch is coupled and tuned, the antenna coupling branch is coupled with the antenna, the ground coupling branch is coupled with the ground of the radio frequency module, a distance area exists 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, and the distance area is partially located in the antenna area.
Optionally, the antenna coupling stub is coupled to an antenna, and includes:
the antenna coupling branch is connected with the antenna;
or, a part of projection of the antenna coupling branch on the plane where the antenna is located in the antenna area, a first coupling area exists in a part of the antenna coupling branch corresponding to the part of projection, and the distance between the first coupling area and the plane where the antenna is located is not larger than a preset distance.
Optionally, the ground coupling branch and the ground coupling of the radio frequency module include:
the ground coupling branch is connected with the ground of the radio frequency module;
or partial projection of the ground coupling branch on the ground plane of the radio frequency module is located in the area of the radio frequency module, a second coupling region exists in the partial coupling branch corresponding to the partial projection, and the distance between the second coupling region and the ground plane of the radio frequency module is not greater than a preset distance.
Optionally, the antenna coupling branch and the ground coupling branch are not connected;
or 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.
Optionally, the perimeter of the antenna coupling branch is not less than λ g /4，λ g Is the equivalent spatial wavelength in the medium related to the dielectric constant epsilon.
Optionally, the preset distance is λ g /10，λ g Is the equivalent spatial wavelength in the medium related to the dielectric constant epsilon.
A second aspect of an embodiment of the present invention provides a radio frequency device, including: a wireless module and an antenna coupling electrical conductor as described above in relation to the first aspect;
the wireless module is an independent module integrated by a radio frequency module and an antenna.
Optionally, the antenna is any one of a PCB antenna, an SMD patch antenna, a ceramic antenna, a metal wire antenna, and a metal stamped part antenna.
A third aspect of an embodiment of the present invention provides a radio frequency device, including: a wireless module and an antenna coupling electrical conductor as described above in the first aspect;
the radio frequency module of the wireless module is independent from the antenna and is connected with the antenna 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 drive PCB of the wireless module.
Optionally, the antenna is any one of a PCB antenna, an SMD patch antenna, a ceramic antenna, a metal wire antenna, and a metal stamped part antenna.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
the embodiment of the invention carries out coupling tuning on the antenna of the wireless module through the antenna coupling branch knot and the ground coupling branch knot, and solves the problem that when the wireless module is applied to different products, the antenna cannot achieve optimal matching with the products and the performance is deteriorated because the antenna is shaped and the resonant frequency and amplitude cannot be adjusted. The antenna coupling electric conductor provided by the embodiment of the invention has a simple structure, can be applied to various wireless modules, improves the compatibility and the reusability of the wireless modules while ensuring the performance, and reduces the development cost.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a first schematic view illustrating an installation of a conventional wireless module according to an embodiment of the present invention;
fig. 2 is a second schematic view illustrating an installation of a conventional wireless module according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a wireless module and an antenna coupling conductor according to an embodiment of the invention;
FIG. 4 is a schematic diagram of an antenna coupling electrical conductor provided by an embodiment of the present invention;
FIG. 5 is a schematic diagram of a wireless module and an antenna coupling conductor according to an embodiment of the invention;
FIG. 6 is a schematic diagram of a wireless module and an antenna coupling conductor according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of an antenna coupling electrical conductor provided by an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a monopole antenna provided by an embodiment of the invention;
fig. 9 is a schematic diagram illustrating a coupling principle of a monopole antenna according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of an IFA antenna according to an embodiment of the present invention;
fig. 11 is a schematic diagram illustrating a coupling principle of an IFA antenna according to an embodiment of the present invention;
fig. 12 is a schematic diagram illustrating a coupling principle of an IFA antenna according to an embodiment of the present invention;
fig. 13 is a schematic view of the installation position of the antenna coupling electrical conductor provided by the embodiment of the present invention;
fig. 14 is a schematic diagram of a resonant frequency of an antenna provided by an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may 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 invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
For a clearer understanding of the present solution, the prior art is briefly introduced:
traditional intelligent product, in order to realize wireless module and electronic drive's connection interaction conveniently, the mode of using the module is often through SMT paster mode paste on driver PCB with plug-in components mode grafting on driver PCB. According to the SMT integration scheme of the module antenna, the drive PCB is arranged below the antenna, so that the original antenna resonant frequency deviates from a working frequency point, the resonant amplitude is low, and the performance is reduced.
In this regard, a module supplier has proposed an improved way to hollow out the PCB around the antenna to reduce the effect of the PCB on the antenna, as shown in fig. 1. However, referring to fig. 2, the antenna is affected by other factors such as the product housing, surrounding electronic components, etc. in addition to the driving PCB, and there is still a frequency offset. When the antenna is affected by other factors to cause frequency deviation, the resonant frequency of the antenna cannot be adjusted to return to the working frequency point.
The present embodiments provide an antenna coupling electrical conductor comprising: an antenna coupling stub and a ground coupling stub.
The antenna coupling electric conductor is used for coupling and tuning the 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. When the antenna is coupled and tuned, the antenna coupling branch is coupled with the antenna, the ground coupling branch is coupled with the ground of the radio frequency module, a distance area exists 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, and the distance area is partially located in the antenna area.
In the embodiment of the present invention, the antenna coupling branch may be a metal sheet with any shape, such as a rectangular, circular ring, or a metal sheet with any irregular shape.
As a possible implementation manner, the antenna coupling stub is coupled to the antenna, and includes:
the antenna coupling branch is connected with the antenna;
or, a part of projection of the antenna coupling branch on the plane where the antenna is located in the antenna area, a first coupling area exists in a part of the antenna coupling branch corresponding to the part of projection, and the distance between the first coupling area and the plane where the antenna is located is not greater than a preset distance.
As a possible implementation manner, the ground coupling branch is coupled with the ground of the radio frequency module, and includes:
the ground coupling branch is connected with the ground of the radio frequency module;
or partial projection of the ground coupling branch on the ground plane of the radio frequency module is located in the area of the radio frequency module, a second coupling region exists in the partial coupling branch corresponding to the partial projection, and the distance between the second coupling region and the ground plane of the radio frequency module is not greater than a preset distance.
For example:
in one embodiment, as shown in fig. 3 and 4, the wireless module is an independent module integrated by a radio frequency module and an antenna, and the independent module is used for being plugged into a driving PCB for wireless signal transmission, and the antenna coupling branch and the ground coupling branch may be both independent metal sheets. The ground coupling branch and the antenna coupling branch are separated by a certain distance, and the ground coupling branch and the antenna coupling branch can be connected without connection or through at least one connection structure, and the connection structure can be any one of but not limited to a conductor, an inductor or a capacitor. The metal sheets can be planar or curved, the antenna coupling branches need to correspond to the positions of the antennas and are not too far away from the antennas, so that the antenna coupling branches can be coupled, and the coupling effect is optimal when the antenna coupling branches are parallel to the antennas. Similarly, the ground coupling branch needs to correspond to the position of the ground plate of the rf module and the distance cannot be too far. And a part of the distance area between the antenna coupling branch and the ground coupling branch needs to be covered by the antenna, so that electromagnetic coupling can be ensured.
In another embodiment, the rf module and the antenna in the wireless module are independently disposed and connected by a microstrip line or a coaxial line, the rf module is an independent module as shown in fig. 5, or the rf module is an rf circuit integrated on the driver PCB as shown in fig. 6, and at this time, since the ground of the rf module is connected to the ground of the driver PCB, the ground plate of the driver PCB can be directly used as a ground coupling stub.
Further, the antenna coupling stub and the ground coupling stub can be combined into various forms for different wireless modules or different adjustment requirements, and fig. 6 shows several common forms (a) - (j), in which case the antenna coupling conductor must satisfy the following conditions:
the antenna coupling branch is coupled with the antenna, and/or the ground coupling branch is coupled with the ground of the radio frequency module, a distance area exists 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, and the distance area is partially located in the antenna area.
Specifically, whether the antenna coupling stub is connected with the ground coupling stub and the form and number of the connection structure are related to the resonant frequency and amplitude to be adjusted, and are detailed as follows:
the number and position of the connection points in the antenna coupling branches change, and then the resonance point and amplitude of the antenna change.
Such as the single feed point antenna shown in fig. 8. Referring to fig. 9, coupling directly to a single feedpoint module antenna can form an electrical connection path 1, adjusting for a new resonance point. The longer the loop path, the lower the frequency, and when the antenna coupling stub is sufficiently long, the electrical connection path 2 can be formed, and a new resonance point can be adjusted.
Alternatively, an IFA antenna as shown in fig. 10. Referring to fig. 11, if there is no grounding point between the connection point and the feeding point, the connection point is directly coupled to form a current path 1 with the IFA antenna, and the extension of the current path can adjust the resonance point to shift toward a low level; the current path 2 can be used to adjust the resonance frequency point to a high shift and to a low shift. Referring to fig. 12, if there is a grounding point between the connection point and the feeding point, the electrical connection path 1 is extended, and the resonance point can be adjusted to be shifted to a low level; the current path 2 can only fine-tune the resonance point due to the presence of the intermediate ground point, but the amplitude can be adjusted significantly. When the antenna coupling branch is not connected with the ground coupling branch, the frequency is mainly adjusted to be low, the amplitude change is adjusted, and the resonant frequency is increased along with the shortening of the perimeter of the antenna coupling branch.
Therefore, the embodiment of the invention carries out coupling tuning on the antenna of the wireless module through the antenna coupling branch and the ground coupling branch, and solves the problem that when the wireless module is applied to different products, the antenna cannot be optimally matched with the products and the performance is deteriorated because the antenna is shaped and the resonant frequency and the resonant amplitude cannot be adjusted. The antenna coupling electric conductor provided by the embodiment of the invention has a simple structure, can be applied to various wireless modules, improves the compatibility and the reusability of the wireless modules while ensuring the performance, and reduces the development cost.
As a possible implementationIn this way, the perimeter of the antenna coupling branch is not less than lambda g/4, the preset distance is lambda g/10, lambda g Is the equivalent spatial wavelength in the medium related to the dielectric constant epsilon.
For example, for the scenario shown in FIG. 3, where the medium is air, the dielectric constant is approximately 1.
For example, for the scenarios shown in fig. 5 and 6, if the medium is plastic or an outwardly extending PCB, the dielectric constant is that of the plastic or PCB.
Fig. 13 shows the installation position of an antenna coupling electrical conductor in a solid structure, and fig. 14 shows the frequency curves for coupling tuning with and without the antenna coupling electrical conductor, comparing the two curves, the antenna coupling electrical conductor adjusts the resonance point from 2.2GHz to 2.4 GHz.
The embodiment of the invention can readjust the resonant frequency and amplitude of the antenna without changing the original antenna, thereby realizing the optimal matching between the wireless module and different products, achieving the optimal radiation performance, and solving the problem of performance deterioration caused by the fact that the antenna cannot be optimally matched with the products because the antenna is shaped and cannot be adjusted when the wireless module is applied to different products. The antenna coupling electric conductor provided by the embodiment of the invention has the advantages of simple structure, small volume, low cost, unlimited form and carrier, realization of copper laying on a PCB (printed Circuit Board), and convenience in assembly and manufacturing process. In terms of wireless performance, the compatibility bottleneck of the wireless module applied to different products is solved.
The embodiment of the present invention further provides a radio frequency device, including: a radio frequency module, an antenna, and an antenna coupling electrical conductor as described above; the wireless module is an independent module formed by integrating a radio frequency module and an antenna, such as the wireless module shown in fig. 3. As a possible implementation manner, the antenna is any one of a PCB antenna, an SMD patch antenna, a ceramic antenna, a metal wire antenna, and a metal stamped part antenna.
The embodiment of the present invention further provides a radio frequency device, including: a radio frequency module, an antenna, and an antenna coupling electrical conductor as described above; the rf module and the antenna are independently disposed and connected by a microstrip line or a coaxial line, and the rf module is an independent module or an rf circuit integrated on a driving PCB of a wireless module, such as the wireless module shown in fig. 5 or 6. As a possible implementation manner, the antenna is any one of a PCB antenna, an SMD patch antenna, a ceramic antenna, a metal wire antenna, and a metal stamped part antenna.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. An antenna coupling electrical conductor, comprising:
the antenna coupling branch and the ground coupling branch;
the antenna coupling electric conductor is used for coupling and tuning the 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; when the antenna is coupled and tuned, the antenna coupling branch is coupled with the antenna, the ground coupling branch is coupled with the ground of the radio frequency module, a distance area exists 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, and the distance area is partially located in the antenna area.
2. The antenna coupling electrical conductor of claim 1, wherein the antenna coupling stub is coupled to an antenna, comprising:
the antenna coupling branch is connected with an antenna;
or, a part of projection of the antenna coupling branch on the plane where the antenna is located in the antenna area, and a first coupling area exists in a part of the antenna coupling branch corresponding to the part of projection, and a distance between the first coupling area and the plane where the antenna is located is not greater than a preset distance.
3. The antenna-coupling electrical conductor of claim 1, wherein the ground coupling stub is coupled to a ground of a radio frequency module, comprising:
the ground coupling branch is connected with the ground of the radio frequency module;
or partial projection of the ground coupling branch on the plane where the ground of the radio frequency module is located in the area of the radio frequency module, a second coupling region exists in the partial coupling branch corresponding to the partial projection, and the distance between the second coupling region and the plane where the ground of the radio frequency module is located is not larger than a preset distance.
4. The antenna-coupling electrical conductor of claim 1, wherein there is no connection between the antenna-coupling stub and the ground-coupling stub;
or, the antenna coupling branch and the ground coupling branch are connected through at least one connection structure, and the connection structure is any one of a conductor, an inductor or a capacitor.
5. The antenna-coupling electrical conductor of claim 1, wherein the antenna-coupling stub has a circumference of no less than λ g /4，λ g Is the equivalent spatial wavelength in the medium related to the dielectric constant epsilon.
6. The antenna-coupling electrical conductor of claim 2 or 3, wherein the predetermined distance is λ g /10，λ g Is the equivalent spatial wavelength in the medium related to the dielectric constant epsilon.
7. A radio frequency device, comprising: a wireless module and an antenna coupling electrical conductor according to any of claims 1-6;
the wireless module is an independent module integrated by a radio frequency module and an antenna.
8. The radio frequency device according to claim 7, wherein the antenna is any one of a PCB antenna, an SMD patch antenna, a ceramic antenna, a metal wire antenna, and a metal stamped antenna.
9. A radio frequency device, comprising: a wireless module and an antenna coupling electrical conductor according to any of claims 1-6;
the radio frequency module of the wireless module is independent from the antenna and is connected with the antenna 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 drive PCB of the wireless module.
10. The radio frequency device according to claim 9, wherein the antenna is any one of a PCB antenna, an SMD patch antenna, a ceramic antenna, a metal wire antenna, and a metal stamped antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210644320.5A CN115064871A (en) | 2022-06-08 | 2022-06-08 | Antenna coupling electric conductor and radio frequency device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210644320.5A CN115064871A (en) | 2022-06-08 | 2022-06-08 | Antenna coupling electric conductor and radio frequency device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115064871A true CN115064871A (en) | 2022-09-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210644320.5A Pending CN115064871A (en) | 2022-06-08 | 2022-06-08 | Antenna coupling electric conductor and radio frequency device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115064871A (en) |
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2022
- 2022-06-08 CN CN202210644320.5A patent/CN115064871A/en active Pending
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