CN111952724B - Antenna module and electronic equipment - Google Patents
Antenna module and electronic equipment Download PDFInfo
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- CN111952724B CN111952724B CN202011043827.2A CN202011043827A CN111952724B CN 111952724 B CN111952724 B CN 111952724B CN 202011043827 A CN202011043827 A CN 202011043827A CN 111952724 B CN111952724 B CN 111952724B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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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
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
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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
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
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Abstract
The embodiment of the application discloses antenna module and electronic equipment, and belongs to the technical field of electronic equipment. This antenna line module includes: the antenna comprises a dielectric substrate, a metal bottom plate, a feed source, a monopole antenna and a resonant antenna; the metal bottom plate is attached to the first surface of the dielectric substrate, the power feed, the monopole antenna and the resonant antenna are located on the second surface of the dielectric substrate, and the monopole antenna and the resonant antenna are located at two ends of the second surface; the monopole antenna is electrically connected with the feed source and used for generating a first electromagnetic wave signal based on a first electric signal generated by the feed source; the resonant antenna is electrically connected with the metal base plate and used for generating a second electromagnetic wave signal based on a second electric signal generated by the metal base plate. Because the monopole antenna and the resonant antenna are positioned at two ends of the dielectric substrate, electromagnetic wave signals are generated at different positions through the monopole antenna and the resonant antenna, so that the energy distribution of the electromagnetic wave signals of the antenna module obtained after superposition is more uniform, and the SAR value of the electronic equipment is reduced.
Description
Technical Field
The embodiment of the application relates to the technical field of electronic equipment, in particular to an antenna module and electronic equipment.
Background
The antenna module is arranged in the electronic equipment such as a mobile phone and a tablet, when a user communicates through the electronic equipment, the antenna module in the electronic equipment generates electromagnetic radiation, and the electromagnetic radiation can affect the user. At present, the degree of influence of electromagnetic radiation on a user is represented by a Specific Absorption Ratio (SAR) value of an electronic device. Therefore, how to reduce the SAR value of the electronic device is an important issue to be solved urgently.
In the related art, the electronic device determines a distance between a user and the electronic device, reduces electromagnetic wave radiation power of an antenna module in response to the distance being smaller than a preset distance, and reduces an SAR value of the electronic device by reducing the electromagnetic wave radiation power of the antenna module of the electronic device.
However, in the related art, reducing the electromagnetic wave radiation power of the antenna module of the electronic device reduces the communication distance of the antenna module, which affects the communication quality of the electronic device.
Disclosure of Invention
The embodiment of the application provides an antenna module and electronic equipment, and the SAR value of the electronic equipment can be reduced. The technical scheme is as follows:
in one aspect, an antenna module is provided, which includes: the antenna comprises a dielectric substrate, a metal bottom plate, a feed source, a monopole antenna and a resonant antenna;
the metal bottom plate is attached to the first surface of the dielectric substrate, the power feed source, the monopole antenna and the resonant antenna are located on the second surface of the dielectric substrate, and the monopole antenna and the resonant antenna are located at two ends of the second surface;
the dielectric substrate is used for fixing the metal bottom plate, the power feed, the monopole antenna and the resonant antenna;
the monopole antenna is electrically connected with the feed source and used for generating a first electromagnetic wave signal based on a first electric signal generated by the feed source;
the resonant antenna is electrically connected with the metal base plate and used for generating a second electromagnetic wave signal based on a second electric signal generated by the metal base plate.
In one possible implementation, the resonant antenna includes a first resonant stub, a second resonant stub, and a third resonant stub;
the first resonance branch, the second resonance branch and the third resonance branch are attached to the second surface;
one end of the first resonance branch is connected with the third resonance branch, the middle of the first resonance branch is connected with the second resonance branch, and the first resonance branch, the second resonance branch and the third resonance branch form an F-shaped resonant antenna.
In another possible implementation, the resonant antenna further comprises a frequency control element;
the frequency control element is located between one end of the first resonance branch and the third resonance branch, and is used for enabling the second resonance branch and the third resonance branch to work in different resonance modes.
In another possible implementation manner, the length of the second resonance stub is smaller than that of the third resonance stub, the second resonance stub operates in the first resonance mode, and the third resonance stub operates in the second resonance mode; alternatively, the first and second liquid crystal display panels may be,
the length of the second resonance branch is greater than that of the third resonance branch, the second resonance branch works in the second resonance mode, and the third resonance branch works in the first resonance mode
The first resonant mode is a resonant mode with a frequency higher than a first preset frequency, and the second resonant mode is a resonant mode with a frequency lower than a second preset frequency.
In another possible implementation, the frequency range of the first resonant mode is 2300MHz-2700MHz, and the frequency range of the second resonant mode is 698MHz-960MHz.
In another possible implementation, the monopole antenna includes a first radiating branch, a second radiating branch, and a third radiating branch;
one end of the first radiation branch is connected with the feed source, and the first radiation branch and the feed source are attached to the second surface;
the other end of the first radiation branch is connected with one end of the second radiation branch, the second radiation branch is perpendicular to the plane where the second surface is located, and the other end of the second radiation branch is connected with the third radiation branch;
the third radiation branch is located above the second surface, parallel to the plane where the second surface is located, and perpendicular to the first radiation branch in the second surface.
In another possible implementation manner, the length of the second radiating branch is matched with the thickness of a shell of the electronic device on which the antenna module is installed.
In another possible implementation, the monopole antenna and the resonant antenna are located on an upper portion of the second surface.
In another possible implementation, the size of the metal base plate is smaller than the size of the dielectric substrate.
In another aspect, an electronic device is provided, which includes: the antenna module comprises a shell and any one of the antenna modules;
the antenna module is located in the shell.
The embodiment of the application provides an antenna module, because monopole antenna and resonance antenna are located the both ends of medium base plate, produce the electromagnetic wave signal at antenna module's different positions through monopole antenna and resonance antenna, the energy distribution of the electromagnetic wave signal of the antenna module that obtains after making the stack is more even, just so avoided the energy of electromagnetic wave signal to concentrate on antenna module's local area, thereby the peak value of the electromagnetic wave signal's of antenna module energy has been reduced, so this antenna module can be under the prerequisite that does not reduce electromagnetic wave radiation power, reduce electronic equipment's SAR value.
Drawings
Fig. 1 is a schematic structural diagram of an antenna module according to an exemplary embodiment of the present application;
fig. 2 illustrates a schematic structural diagram of a monopole antenna shown in an exemplary embodiment of the present application;
fig. 3 shows a schematic structural diagram of a resonant antenna according to another exemplary embodiment of the present application;
fig. 4 is a diagram illustrating a distribution of SAR values of an antenna module of the present application at 820MHz according to an exemplary embodiment of the present application;
fig. 5 is a diagram illustrating a distribution of SAR values of an antenna module of a reference group at 820MHz according to an exemplary embodiment of the present application;
fig. 6 is a diagram illustrating a distribution of SAR values of an antenna module according to the present application at 2500MHz according to an exemplary embodiment of the present application;
fig. 7 is a diagram illustrating a distribution of SAR values of antenna modules of a reference group at 2500MHz according to an exemplary embodiment of the present application;
FIG. 8 illustrates a schematic structural diagram of an electronic device shown in an exemplary embodiment of the present application;
fig. 9 is a diagram illustrating reflection coefficients of an antenna module according to an exemplary embodiment of the present application;
fig. 10 is a diagram illustrating radiation efficiency of an antenna module according to an exemplary embodiment of the present application.
Reference numerals:
10. antenna module
11. Dielectric substrate
12. Metal bottom plate
13. Feed power supply
14. Monopole antenna
141. First radiation branch knot
142. Second radiation branch
143. Third radiation branch
15. Resonant antenna
151. First resonant stub
152. Second resonance branch
153. Third resonant branch
154. Frequency control element
20. Electronic device
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, the following detailed description of the embodiments of the present application will be made with reference to the accompanying drawings.
When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
In the description of the present application, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated object, indicating that there may be three relationships, for example, a and/or B, which may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
Referring to fig. 1, a schematic structural diagram of an antenna module 10 according to an exemplary embodiment of the present application is shown. The antenna module 10 includes: a dielectric substrate 11, a metal base plate 12, a feed source 13, a monopole antenna 14 and a resonant antenna 15;
the metal base plate 12 is attached to the first surface of the dielectric substrate 11, the feed source 13, the monopole antenna 14 and the resonant antenna 15 are located on the second surface of the dielectric substrate 11, and the monopole antenna 14 and the resonant antenna 15 are located at two ends of the second surface;
a dielectric substrate 11 for fixing a metal base plate 12, a feed source 13, a monopole antenna 14, and a resonant antenna 15;
the monopole antenna 14 is electrically connected with the feed source 13 and is used for generating a first electromagnetic wave signal based on a first electric signal generated by the feed source 13;
the resonant antenna 15 is electrically connected to the metal base 12, and is configured to generate a second electromagnetic wave signal based on a second electrical signal generated by the metal base 12.
Wherein, the first surface is the upper surface of the dielectric substrate 11, and the second surface is the lower surface of the dielectric substrate 11; alternatively, the first surface is the lower surface of the dielectric substrate 11, and the second surface is the upper surface of the dielectric substrate 11.
The embodiment of the application provides an antenna module 10, because monopole antenna 14 and resonant antenna 15 are located medium substrate 11's both ends, produce electromagnetic wave signal at antenna module 10's different positions through monopole antenna 14 and resonant antenna 15, the energy distribution of the electromagnetic wave signal of the antenna module 10 that makes after the stack obtain is more even, the energy that has just so avoided electromagnetic wave signal concentrates on antenna module 10's local area, thereby the peak value of the electromagnetic wave signal's of antenna module 10 energy has been reduced, so this antenna module 10 can be under the prerequisite that does not reduce electromagnetic wave radiation power, reduce electronic equipment 20's SAR value.
Introduction of dielectric substrate 11: and a dielectric substrate 11 for fixing the metal base plate 12, the power supply 13, the monopole antenna 14, and the resonant antenna 15. The material of the dielectric substrate 11 is an insulating material, for example, polytetrafluoroethylene resin, glass fiber, ceramic powder-filled thermosetting resin, or the like. The shape of the dielectric substrate 11 may be circular, rectangular, or the like. Wherein, the shape and size of the dielectric substrate 11 are matched with the shape and size of the electronic device 20 for mounting the antenna module 10. Optionally, the dielectric substrate 11 is a PCB (Printed Circuit Board).
In the embodiment of the present application, the material, shape and size of the dielectric substrate 11 are not particularly limited, and may be set and changed as needed. For example, the electronic device 20 is a mobile phone, the dielectric substrate 11 has a rectangular shape, and the dielectric substrate 11 has a length of 150mm, a width of 80mm, and a thickness of 0.8mm.
Introduction of the metal base plate 12: the metal base plate 12 is attached to the first surface of the dielectric substrate 11. The resonant antenna 15 is electrically connected to the metal chassis 12. The metal chassis 12 generates a second electrical signal, and the resonant antenna 15 generates a second electromagnetic wave signal based on the second electrical signal generated by the metal chassis 12.
The metal base plate 12 is made of metal such as copper and aluminum. In one possible implementation, the metal bottom plate 12 has a shape and size corresponding to the shape and size of the dielectric substrate 11. Optionally, the size of the metal base plate 12 is smaller than the size of the dielectric substrate 11. For example, the metal base plate 12 has a rectangular shape, and the metal base plate 12 has a length of 150mm, a width of 70mm, and a thickness of 0.5mm. In the embodiment of the present application, the material, shape and size of the metal base plate 12 are not particularly limited, and may be set and modified as needed.
Introduction of the power feed 13: the power feed 13 is located on the second surface of the dielectric substrate 11. The monopole antenna 14 is electrically connected to the power supply 13. The feeding source 13 generates a first electrical signal, and the monopole antenna 14 generates a first electromagnetic wave signal based on the first electrical signal generated by the feeding source 13.
In one possible implementation, the first electrical signal and the first electromagnetic wave signal are radio frequency signals. The feed source 13 may input a radio frequency signal to the monopole antenna 14, or may receive a radio frequency signal returned by the monopole antenna 14.
Introduction of monopole antenna 14: the monopole antenna 14 is located on the second surface of the dielectric substrate 11 and is configured to generate a first electromagnetic wave signal based on the first electrical signal generated by the power feeding source 13. The monopole antenna 14 is made of metal such as copper and aluminum. The energy of the first electromagnetic wave signal includes electric field energy and magnetic field energy.
In one possible implementation, referring to fig. 2, the monopole antenna 14 includes a first radiating branch 141, a second radiating branch 142, and a third radiating branch 143; one end of the first radiation branch 141 is connected to the feeding source 13, and the first radiation branch 141 and the feeding source 13 are attached to the second surface; the other end of the first radiation branch 141 is connected with one end of the second radiation branch 142, the second radiation branch 142 is perpendicular to the plane where the second surface is located, and the other end of the second radiation branch 142 is connected with the third radiation branch 143; the third radiation branch 143 is located above the second surface, parallel to the plane of the second surface, and perpendicular to the first radiation branch 141 in the second surface.
In one possible implementation, the length of the second radiating branch 142 matches the thickness of the housing of the electronic device 20 in which the antenna module 10 is installed. For example, the thickness of the housing of the electronic device 20 is 10mm, and the length of the second radiating branch 142 may be any value between 7mm and 10 mm.
It should be noted that the widths of the first radiation branch 141, the second radiation branch 142, and the third radiation branch 143 are any value between 1mm and 2 mm. In one possible implementation, the widths of the first radiating branch 141, the second radiating branch 142, and the third radiating branch 143 are the same. The length of the first radiation branch 141 is 12mm, and the width is 1.5mm; the length of the second radiation branch 142 is 7mm, and the width is 1.5mm; the third radiating branch 143 has a length of 65mm and a width of 1.5mm.
The thickness of the first, second and third radiating branches 141, 142, 143 may be any value between 0.1mm and 1mm. Optionally, the thicknesses of the first radiation branch 141, the second radiation branch 142, and the third radiation branch 143 are the same.
Introduction of the resonant antenna 15: the resonant antenna 15 is located on the second surface of the dielectric substrate 11 for generating a second electromagnetic wave signal. Wherein the monopole antenna 14 and the resonant antenna 15 are located at both ends of the second surface. The energy of the second electromagnetic wave signal includes electric field energy and magnetic field energy.
In one possible implementation, referring to fig. 3, resonant antenna 15 includes a first resonant stub 151, a second resonant stub 152, and a third resonant stub 153; the first resonance branch 151, the second resonance branch 152 and the third resonance branch 153 are attached to the second surface; one end of the first resonance stub 151 is connected to the third resonance stub 153, the middle portion of the first resonance stub 151 is connected to the second resonance stub 152, and the F-shaped resonant antenna 15 is formed by the first resonance stub 151, the second resonance stub 152, and the third resonance stub 153.
The widths of the first, second and third resonant stubs 151, 152 and 153 are the same. Optionally, the widths of the first resonant stub 151, the second resonant stub 152, and the third resonant stub 153 are any value between 0.5mm and 1.5mm. For example, the first resonance branch 151 has a length of 8mm and a width of 1mm, the second resonance branch 152 has a length of 20mm and a width of 1mm, and the third resonance branch 153 has a length of 50mm and a width of 1mm.
Optionally, the thicknesses of the first resonant stub 151, the second resonant stub 152, and the third resonant stub 153 are the same. The thickness of the first, second and third resonant stubs 151, 152, 153 may be any value between 0.1mm and 1mm.
It should be noted that, in the "F" -shaped resonant antenna 15, the length of the second resonant branch 152 is different from the length of the third resonant branch 153, and the second resonant branch 152 and the third resonant branch 153 operate in different resonant modes. The longer the length of the resonant stub, the lower the frequency of the corresponding resonant mode.
In one possible implementation manner, the length of the second resonance branch 152 is smaller than that of the third resonance branch 153, the second resonance branch 152 operates in the first resonance mode, and the third resonance branch 153 operates in the second resonance mode. In another possible implementation manner, the length of the second resonance branch 152 is greater than the length of the third resonance branch 153, the second resonance branch 152 operates in the second resonance mode, and the third resonance branch 153 operates in the first resonance mode, where the first resonance mode is a resonance mode with a frequency higher than the first preset frequency, and the second resonance mode is a resonance mode with a frequency lower than the second preset frequency. In the embodiment of the present application, the numerical values of the first preset frequency and the second preset frequency are not specifically limited, and may be set and changed as needed. Optionally, the first preset frequency is 2300MHz, and the second preset frequency is 1000MHz.
In one possible implementation, the first frequency resonant mode has a frequency in a range of 2300MHz to 2700MHz, and the first frequency resonant mode is a high frequency resonant mode. The second resonant mode has a frequency in the range of 698MHz-960MHz, and the second resonant mode is a low frequency resonant mode.
In the embodiment of the present application, since the second resonance branch 152 and the third resonance branch 153 operate in the low-frequency resonance mode and the high-frequency resonance mode, and the resonance branches in different resonance modes make the energy distribution of the electromagnetic wave signal of the antenna module 10 more uniform, and reduce the peak value of the energy of the electromagnetic wave signal of the antenna module 10, so as to reduce the SAR value of the electronic device 20.
In one possible implementation, the resonant antenna 15 further comprises a frequency control element 154; the frequency control element 154 is located between one end of the first resonance branch 151 and the third resonance branch 153, and is configured to enable the second resonance branch 152 and the third resonance branch 153 to operate in different resonance modes. Optionally, the frequency control element 154 is a lumped inductive element.
In a possible implementation manner, the resonant frequency of the second electromagnetic wave signal is the same as the resonant frequency of the first electromagnetic wave signal, and the electromagnetic wave signals are generated at different positions through the monopole antenna 14 and the resonant antenna 15, so that the energy distribution of the electromagnetic wave signals of the antenna module 10 obtained after superposition is more uniform.
It should be noted that, in order to increase the overlapping area of the first electromagnetic wave signal and the second electromagnetic wave signal and make the energy distribution of the electromagnetic wave signal of the antenna module 10 obtained after the overlapping more uniform, the monopole antenna 14 and the resonant antenna 15 are simultaneously located on the upper portion or the lower portion of the second surface. In one possible implementation, with continued reference to fig. 1, the monopole antenna 14 and the resonant antenna 15 are located on top of the second surface.
Next, through a comparative test, the energy distribution of the electromagnetic wave signal of the antenna module 10 is verified more uniformly from the experimental result. The experimental group is the antenna module 10 in the present application, and the reference group is the antenna module 10 including only the monopole antenna 14.
Optionally, the SAR values of the antenna module 10 of the present application and the antenna module of the reference group are tested by electromagnetic simulation software under different resonant frequencies. In one possible implementation, the electromagnetic Simulation software is CST (Computer Simulation Technology, commercial Simulation software).
The specific testing process of the SAR value comprises the following steps (1) to (4):
(1) The SAR value of the antenna module 10 of the present application under 820MHz condition is tested, and the test result is shown in fig. 4. Referring to fig. 4, the maximum SAR value of the antenna module 10 of the present application under the 820MHz condition is 1.26W/kg. Moreover, the antenna module 10 of the present application has uniform distribution of SAR values under the 820MHz condition, and no obvious local aggregation.
(2) The SAR values of the antenna modules of the reference group under 820MHz conditions were tested, and the test results are shown in fig. 5. Referring to fig. 5, the maximum SAR value of the antenna module of the reference group under 820MHz is 2.22W/kg. And, the SAR value distribution of the antenna module of the reference group under the 820MHz condition has obvious local aggregation.
(3) The SAR value of the antenna module 10 of the present application under the 2500MHz condition is tested, and the test result is shown in fig. 6. Referring to fig. 6, the maximum SAR value of the antenna module 10 of the present application is 3.01W/kg under the 2500MHz condition. In addition, the SAR value of the antenna module 10 is distributed uniformly under the 2500MHz condition, and no obvious local aggregation exists.
(4) The SAR values of the antenna modules of the reference group under the 2500MHz condition were tested, and the test results are shown in fig. 7. Referring to fig. 7, the maximum SAR value of the antenna module of the reference group is 3.9W/kg under the 2500MHz condition. And the SAR value distribution of the antenna module of the reference group under the 2500MHz condition has obvious local aggregation.
It should be noted that 820MHz is a frequency when the antenna module 10 operates in the 0.25 λ mode, and 2500MHz is a frequency when the antenna module 10 operates in the 0.75 λ mode. From the energy density angle analysis, when the antenna module 10 works in a 0.25 lambda mode, the distribution of the electric field energy density and the magnetic field energy density is more uniform; while operating in the 0.75 λ mode, the electric field energy density and magnetic field energy density distributions are more concentrated. Therefore, the relationship between the distribution of the electric field energy density and the magnetic field energy density and the SAR value of the antenna module 10 is: the more concentrated the electromagnetic field energy density distribution, the higher the SAR value of the antenna module 10. That is, by changing the electromagnetic field energy density distribution, the electromagnetic field energy density distribution is made uniform, and the SAR value of the antenna module 10 can be reduced.
According to the comparative test, the antenna module of the reference group is only provided with the monopole antenna 14, and the energy of the electromagnetic wave signal is obviously locally concentrated at the monopole antenna 14. In the antenna module 10 of the present application, the monopole antenna 14 and the resonant antenna 15 are located at two ends of the dielectric substrate 11, so that the energy distribution of the electromagnetic wave signal is more uniform. Therefore, the resonant antenna 15 can change the electromagnetic energy distribution of the monopole antenna 14, and further achieve the effect of reducing the SAR value of the antenna module 10.
Referring to fig. 8, a schematic structural diagram of an electronic device 20 according to an exemplary embodiment of the present application is shown. The electronic device 20 includes: the housing and the antenna module 10 in any of the above possible implementations; the antenna module 10 is located in the housing.
It should be noted that the impedance matching and the radiation efficiency of the antenna module 10 of the present application satisfy the requirements of the antenna design of the electronic device 20. The electronic device 20 may be a cell phone, tablet, etc. In the embodiment of the present application, taking the electronic device 20 as a mobile phone as an example, the reflection coefficient and the antenna efficiency of the antenna module 10 of the present application are tested. Optionally, the performance of the antenna module 10 is tested by electromagnetic simulation software.
(1) The reflection coefficient of the antenna module 10 of the present application is tested, and the test result is shown in fig. 9. In one possible implementation, the reflection coefficient of the antenna module 10 is smaller than-6 dB. Referring to fig. 9, the reflection coefficients of the antenna module 10 of the present application are smaller than-6 dB in the frequency band 698MHz-960MHz and the frequency band 2300MHz-2700 MHz. The antenna module 10 has a good impedance matching with the electronic device 20 in the frequency band 698MHz-960MHz and the frequency band 2300MHz-2700 MHz.
(2) The antenna efficiency of the antenna module 10 of the present application is tested, and the test result is shown in fig. 10. Referring to fig. 10, the radiation efficiency of the antenna module 10 in the frequency band 698MHz-960MHz is greater than 78%, and the radiation efficiency in the frequency band 2300MHz-2700MHz is greater than 53%. The radiation efficiency of the antenna module 10 of the present application meets the requirements of the antenna design of the electronic device 20.
As can be seen from the above test results, the antenna module 10 of the present application can reduce the SAR value of the electronic device 20, and has no influence on the impedance matching and radiation efficiency of the antenna module 10, so that the requirement of the antenna design of the electronic device 20 can be satisfied.
The embodiment of the present application provides an electronic equipment 20, in electronic equipment 20's antenna module 10, because monopole antenna 14 and resonant antenna 15 are located the both ends of dielectric substrate 11, produce electromagnetic wave signal at antenna module 10's different positions through monopole antenna 14 and resonant antenna 15, make the energy distribution of the electromagnetic wave signal of the antenna module 10 that obtains after the stack more even, the local area at antenna module 10 is concentrated in the energy of just so having avoided electromagnetic wave signal, thereby the peak value of the electromagnetic wave signal's of antenna module 10 has been reduced, so this antenna module 10 can be under the prerequisite that does not reduce electromagnetic wave radiation power, reduce electronic equipment 20's SAR value.
The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (8)
1. An antenna module, characterized in that, the antenna module includes: the antenna comprises a dielectric substrate, a metal bottom plate, a feed source, a monopole antenna and a resonant antenna;
the metal bottom plate is attached to the first surface of the dielectric substrate, the feed source, the monopole antenna and the resonant antenna are located on the second surface of the dielectric substrate, and the monopole antenna and the resonant antenna are located at two ends of the second surface;
the dielectric substrate is used for fixing the metal bottom plate, the feed source, the monopole antenna and the resonant antenna;
the monopole antenna is electrically connected with the feed source and used for generating a first electromagnetic wave signal based on a first electric signal generated by the feed source;
the resonant antenna is electrically connected with the metal base plate and is used for generating a second electromagnetic wave signal based on a second electric signal generated by the metal base plate;
the resonant antenna comprises a first resonant branch, a second resonant branch, a third resonant branch and a frequency control element; the first resonance branch, the second resonance branch and the third resonance branch are attached to the second surface; one end of the first resonance branch is connected with the third resonance branch, the middle part of the first resonance branch is connected with the second resonance branch, and the first resonance branch, the second resonance branch and the third resonance branch form an F-shaped resonance antenna;
the frequency control element is located between one end of the first resonance branch and the third resonance branch, and is used for enabling the second resonance branch and the third resonance branch to work in different resonance modes.
2. The antenna module of claim 1, wherein the length of the second resonant stub is less than the length of the third resonant stub, the second resonant stub operating in a first resonant mode, the third resonant stub operating in a second resonant mode; alternatively, the first and second electrodes may be,
the length of the second resonance branch is greater than that of the third resonance branch, the second resonance branch works in a second resonance mode, and the third resonance branch works in a first resonance mode;
the first resonance mode is a resonance mode with a frequency higher than a first preset frequency, and the second resonance mode is a resonance mode with a frequency lower than a second preset frequency.
3. The antenna module of claim 2, wherein the first resonant mode has a frequency in a range of 2300MHz-2700MHz, and the second resonant mode has a frequency in a range of 698MHz-960MHz.
4. The antenna module of claim 1, wherein the monopole antenna includes a first radiating stub, a second radiating stub, and a third radiating stub;
one end of the first radiation branch is connected with the feed source, and the first radiation branch and the feed source are attached to the second surface;
the other end of the first radiation branch is connected with one end of the second radiation branch, the second radiation branch is perpendicular to the plane where the second surface is located, and the other end of the second radiation branch is connected with the third radiation branch;
the third radiation branch is located above the second surface, parallel to the plane where the second surface is located, and perpendicular to the first radiation branch in the second surface.
5. The antenna module of claim 4, wherein the length of the second radiating stub matches a thickness of a housing of an electronic device in which the antenna module is installed.
6. The antenna module of claim 1 wherein the monopole antenna and the resonant antenna are located on an upper portion of the second surface.
7. The antenna module of claim 1, wherein the size of the metal base plate is smaller than that of the dielectric substrate.
8. An electronic device, characterized in that the electronic device comprises: a housing and the antenna module of any of claims 1-7;
the antenna module is located in the shell.
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1653645A (en) * | 2002-06-25 | 2005-08-10 | 松下电器产业株式会社 | Antenna for portable radio |
| CN103441330A (en) * | 2013-08-06 | 2013-12-11 | 华为终端有限公司 | Wireless communication equipment |
| CN103474762A (en) * | 2013-08-13 | 2013-12-25 | 北京航空航天大学 | Broadband multi-frequency-range printed antenna based on double sided parallel strip line (DSPSL) feed structure |
| CN104022354A (en) * | 2014-06-18 | 2014-09-03 | 广东工业大学 | Narrow-spacing low-SAR high-isolation MIMO antenna |
| CN104701623A (en) * | 2015-03-25 | 2015-06-10 | 电子科技大学 | High-isolation MIMO (Multiple Input Multiple Output) antenna |
| CN104733861A (en) * | 2013-12-20 | 2015-06-24 | 深圳富泰宏精密工业有限公司 | Antenna structure and wireless communication device with same |
| CN105529525A (en) * | 2014-10-21 | 2016-04-27 | 中兴通讯股份有限公司 | Antenna structure |
| CN105940556A (en) * | 2013-10-16 | 2016-09-14 | 盖尔创尼克斯有限公司 | Compact antenna with dual tuning mechanism |
| CN206907924U (en) * | 2017-07-12 | 2018-01-19 | 惠州Tcl移动通信有限公司 | A kind of antenna assembly and terminal device |
| JPWO2017069181A1 (en) * | 2015-10-22 | 2018-06-28 | 株式会社村田製作所 | Antenna device |
| CN110994138A (en) * | 2019-12-25 | 2020-04-10 | 维沃移动通信有限公司 | Electronic equipment |
| CN111355015A (en) * | 2018-12-24 | 2020-06-30 | 北京小米移动软件有限公司 | Mobile terminal |
| CN211208677U (en) * | 2019-11-04 | 2020-08-07 | 深圳市万普拉斯科技有限公司 | Antenna and electronic device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI341053B (en) * | 2008-08-20 | 2011-04-21 | Acer Inc | Multiband monopole slot antenna |
| TWI393291B (en) * | 2009-03-27 | 2013-04-11 | Acer Inc | A monopole slot antenna |
| US10229298B2 (en) * | 2013-08-06 | 2019-03-12 | Hand Held Products, Inc. | RFID devices using metamaterial antennas |
| CN110718756A (en) * | 2019-10-17 | 2020-01-21 | 西安电子科技大学昆山创新研究院 | Novel planar three-frequency-band-pass filter antenna |
| CN211126046U (en) * | 2019-12-25 | 2020-07-28 | 歌尔科技有限公司 | Mobile terminal and antenna thereof |
-
2020
- 2020-09-28 CN CN202011043827.2A patent/CN111952724B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1653645A (en) * | 2002-06-25 | 2005-08-10 | 松下电器产业株式会社 | Antenna for portable radio |
| CN103441330A (en) * | 2013-08-06 | 2013-12-11 | 华为终端有限公司 | Wireless communication equipment |
| CN103474762A (en) * | 2013-08-13 | 2013-12-25 | 北京航空航天大学 | Broadband multi-frequency-range printed antenna based on double sided parallel strip line (DSPSL) feed structure |
| CN105940556A (en) * | 2013-10-16 | 2016-09-14 | 盖尔创尼克斯有限公司 | Compact antenna with dual tuning mechanism |
| CN104733861A (en) * | 2013-12-20 | 2015-06-24 | 深圳富泰宏精密工业有限公司 | Antenna structure and wireless communication device with same |
| CN104022354A (en) * | 2014-06-18 | 2014-09-03 | 广东工业大学 | Narrow-spacing low-SAR high-isolation MIMO antenna |
| CN105529525A (en) * | 2014-10-21 | 2016-04-27 | 中兴通讯股份有限公司 | Antenna structure |
| CN104701623A (en) * | 2015-03-25 | 2015-06-10 | 电子科技大学 | High-isolation MIMO (Multiple Input Multiple Output) antenna |
| JPWO2017069181A1 (en) * | 2015-10-22 | 2018-06-28 | 株式会社村田製作所 | Antenna device |
| CN206907924U (en) * | 2017-07-12 | 2018-01-19 | 惠州Tcl移动通信有限公司 | A kind of antenna assembly and terminal device |
| CN111355015A (en) * | 2018-12-24 | 2020-06-30 | 北京小米移动软件有限公司 | Mobile terminal |
| CN211208677U (en) * | 2019-11-04 | 2020-08-07 | 深圳市万普拉斯科技有限公司 | Antenna and electronic device |
| CN110994138A (en) * | 2019-12-25 | 2020-04-10 | 维沃移动通信有限公司 | Electronic equipment |
Non-Patent Citations (2)
| Title |
|---|
| 《Research on forward-looking synthetic aperture radar imaging algorithm of high velocity platform》;Bo Pang;《IET International Radar Conference 2013》;20131010;全文 * |
| 《一种小型化高隔离的5G移动终端MIMO天线阵列》;姜文;《2019年全国天线年会论文集（上册）》;20190722;全文 * |
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|---|---|
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