Antenna module and terminal equipment

Abstract

The utility model provides an antenna module and terminal equipment, and the antenna module comprises a first radiation arm, a second radiation arm, and a metal structure. Wherein the feeding point of the first radiation arm and the feeding point of the second radiation arm are respectively connected with a radiation signal, and the first radiation arm and the second radiation arm are coupled to generate a first coupling current; the metal structure is arranged between the first radiation arm and the second radiation arm, the first radiation arm and the second radiation arm are coupled through the metal structure and generate a second coupling current, and the second coupling current counteracts at least part of the first coupling current. According to the antenna module and the terminal device, the antenna module can be provided with the first radiation arm and the second radiation arm at the same time in a small space, it can be guaranteed that the first radiation arm and the second radiation arm have high radiation performance, and therefore the efficient and stable communication requirement is met.

Description

Technical Field

[0001] The present disclosure relates to the field of antenna technology, and in particular to an antenna module and a terminal device. Background Art

[0002] With the continuous improvement of industrial level, the performance requirements for terminal equipment are getting higher and higher. Among them, when terminal equipment uses signals in a certain frequency band to communicate, it is often achieved through a single antenna. However, a single antenna is prone to low reliability and stability due to the multipath effect. At the same time, due to the limited space in the terminal equipment, adding antennas in the terminal equipment will cause isolation problems between antennas, resulting in a decrease in antenna performance and difficulty in meeting communication needs. Summary of the invention

[0003] The present disclosure aims to solve one of the technical problems in the related art at least to some extent.

[0004] To this end, an object of the present disclosure is to provide an antenna module and a terminal device.

[0005] To achieve the above-mentioned purpose, the first aspect of the present disclosure provides an antenna module, comprising: a first radiating arm, a second radiating arm and a metal structure; wherein the feeding point of the first radiating arm and the feeding point of the second radiating arm are respectively connected to the radiation signal, and the first radiating arm and the second radiating arm are coupled and generate a first coupling current; the metal structure is arranged between the first radiating arm and the second radiating arm, and the first radiating arm and the second radiating arm are coupled through the metal structure and generate a second coupling current, and the metal structure is used to adjust the amplitude and phase of the second coupling current so that the second coupling current offsets at least part of the first coupling current.

[0006] Optionally, the metal structure includes: a first metal, which is arranged between the first radiation arm and the second radiation arm, and the first metal is coupled to the first radiation arm; a second metal, which is arranged between the first radiation arm and the second radiation arm, and the second metal is coupled to the second radiation arm; wherein an end of the first metal away from the first radiation arm is connected to an end of the second metal away from the second radiation arm.

[0007] Optionally, the length of the first metal is one quarter of the wavelength of the radiation signal; and / or the length of the second metal is one quarter of the wavelength of the radiation signal.

[0008] Optionally, one end of the first metal close to the first radiation arm is distributed in a serpentine shape; and / or one end of the second metal close to the second radiation arm is distributed in a serpentine shape.

[0009] Optionally, the first metal and the second metal as well as the first radiation arm and the second radiation arm are symmetrically arranged along a set axis.

[0010] Optionally, the antenna module further includes: a ground layer and a gap; wherein the ground layer is respectively connected to an end of the first radiation arm close to the second radiation arm and an end of the second radiation arm close to the first radiation arm, and the gap is arranged on the ground layer.

[0011] Optionally, the gap includes: a first gap, which is arranged on a side of the ground layer close to the first radiation arm, and the first gap extends in a direction away from the first radiation arm after being bent; a second gap, which is arranged on a side of the ground layer close to the second radiation arm, and the second gap extends in a direction away from the second radiation arm after being bent; wherein an end of the first gap away from the first radiation arm is connected to an end of the second gap away from the second radiation arm.

[0012] Optionally, the length of the first slot is one quarter of the wavelength of the radiation signal; and / or the length of the second slot is one quarter of the wavelength of the radiation signal.

[0013] Optionally, the first slot and the second slot as well as the first radiation arm and the second radiation arm are symmetrically arranged along a set axis.

[0014] Optionally, one end of the first radiation arm away from the second radiation arm is distributed in a serpentine shape; and / or one end of the second radiation arm away from the first radiation arm is distributed in a serpentine shape.

[0015] Optionally, the radiation signal includes: a 2.4 GHz frequency band signal.

[0016] Optionally, the antenna module further includes: a dielectric plate, and the first radiation arm, the second radiation arm and the metal structure are respectively arranged on the dielectric plate.

[0017] A second aspect of the present disclosure provides a terminal device, including: an antenna module as provided in the first aspect of the present disclosure.

[0018] The technical solution provided by the present disclosure may have the following beneficial effects:

[0019] Since the first radiation arm and the second radiation arm are coupled and generate the first coupling current, the isolation between the first radiation arm and the second radiation arm is low, which will cause the performance of the antenna module to decline. However, since the first radiation arm and the second radiation arm are also coupled through the metal structure and generate the second coupling current, the second coupling current can offset at least part of the first coupling current, thereby effectively reducing or even eliminating the influence of the first coupling current on the first radiation arm and the second radiation arm, thereby improving the isolation between the first radiation arm and the second radiation arm. As a result, the antenna module can simultaneously set the first radiation arm and the second radiation arm in a smaller space, and can also ensure that the first radiation arm and the second radiation arm have higher radiation performance, thereby meeting the requirements of efficient and stable communication.

[0020] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description or learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present disclosure will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0022] Figure 1 is a structural schematic diagram of an antenna module proposed in one embodiment of the present disclosure;

[0023] Figure 2 is a structural schematic diagram of a metal structure in an antenna module proposed in an embodiment of the present disclosure;

[0024] Figure 3 is a structural schematic diagram of a metal structure in an antenna module proposed in an embodiment of the present disclosure;

[0025] Figure 4 is a structural schematic diagram of a metal structure in an antenna module proposed in an embodiment of the present disclosure;

[0026] Figure 5 is a simulation curve diagram of an antenna module proposed in one embodiment of the present disclosure;

[0027] As shown in the figure: 1, first radiation arm, 2, second radiation arm;

[0028] 3. Metal structure, 31. First metal, 32. Second metal, 33. Ground layer, 34. Gap, 341. First gap, 342. Second gap, 4. Dielectric plate. DETAILED DESCRIPTION

[0029] Embodiments of the present disclosure are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present disclosure, and are not to be construed as limitations of the present disclosure. On the contrary, the embodiments of the present disclosure include all changes, modifications, and equivalents that fall within the spirit and connotation of the appended claims.

[0030] like Figure 1 As shown, an embodiment of the present disclosure proposes an antenna module, including a first radiation arm 1, a second radiation arm 2 and a metal structure 3, wherein a feeding point of the first radiation arm 1 and a feeding point of the second radiation arm 2 are respectively connected to radiation signals, and the first radiation arm 1 and the second radiation arm 2 are coupled and generate a first coupling current, the metal structure 3 is arranged between the first radiation arm 1 and the second radiation arm 2, and the first radiation arm 1 and the second radiation arm 2 are coupled through the metal structure 3 and generate a second coupling current, and the metal structure 3 is used to adjust the amplitude and phase of the second coupling current so that the second coupling current offsets at least part of the first coupling current.

[0031] It can be understood that, since the feeding point of the first radiation arm 1 is connected to the radiation signal, the first radiation arm 1 can be stimulated to emit a radiation current, thereby radiating the radiation signal, thereby meeting the communication requirements. At the same time, since the feeding point of the second radiation arm 2 is connected to the radiation signal, the second radiation arm 2 can be stimulated to emit a radiation current, thereby radiating the radiation signal, thereby meeting the communication requirements. Among them, since the positions of the first radiation arm 1 and the second radiation arm 2 are different, the propagation paths of the radiation signal radiated by the first radiation arm 1 and the radiation signal radiated by the second radiation arm 2 are different. Therefore, the radiation signal radiated by the first radiation arm 1 and the radiation signal radiated by the second radiation arm 2 have different attenuations, and the changes in parameters such as amplitude and phase are different. Therefore, the radiation signal radiated by the first radiation arm 1 and the radiation signal radiated by the second radiation arm 2 can be used as a reference and comparison with each other, thereby ensuring that the antenna module has high reliability and stability.

[0032] At the same time, since the first radiation arm 1 and the second radiation arm 2 are coupled and generate the first coupling current, the isolation between the first radiation arm 1 and the second radiation arm 2 is low, which will cause the performance of the antenna module to deteriorate. However, since the first radiation arm 1 and the second radiation arm 2 are also coupled through the metal structure 3 and generate the second coupling current, the second coupling current can offset at least part of the first coupling current, thereby effectively reducing or even eliminating the influence of the first coupling current on the first radiation arm 1 and the second radiation arm 2, thereby improving the isolation between the first radiation arm 1 and the second radiation arm 2. As a result, the antenna module can be provided with the first radiation arm 1 and the second radiation arm 2 in a relatively small space, and can also ensure that the first radiation arm 1 and the second radiation arm 2 have high radiation performance, thereby meeting the requirements of efficient and stable communication.

[0033] It should be noted that, in the relevant embodiments, if only the first radiation arm 1 or the second radiation arm 2 is set, the radiation signal generated will produce multiple components. The propagation paths between different components are different, and the time to arrive at the receiving end is also different. The components are superimposed or offset on each other at the receiving end, which will cause distortion of the radiation signal or generate errors. This phenomenon is also called multipath effect. The multipath effect will lead to lower reliability and stability of the antenna module, which is difficult to meet the use requirements. In this embodiment, since the first radiation arm 1 and the second radiation arm 2 are set at different positions at the same time, the radiation signal radiated by the first radiation arm 1 and the radiation signal radiated by the second radiation arm 2 can be used as a reference and comparison with each other, so that the antenna module and the receiving end can communicate stably and reliably based on the two radiation signals with different parameter changes.

[0034] Among them, the application scenario of the antenna module can be set according to actual needs, and there is no restriction on this. For example, the antenna module can be used for positioning. Specifically, in the relevant embodiments, the receiving end only locates the antenna module based on the strength of a radiation signal, but the strength of the radiation signal is prone to distortion, errors and other problems due to the multipath effect. In this embodiment, the receiving end can determine the specific position of the antenna module based on two radiation signals with different parameter changes, and the positioning accuracy is greatly improved.

[0035] When the first radiation arm 1 and the second radiation arm 2 are arranged close to each other due to space limitations, the first radiation arm 1 and the second radiation arm 2 will couple and generate a coupling current. In this embodiment, a first coupling path and a second coupling path will exist between the first radiation arm 1 and the second radiation arm 2. The first coupling path exists in the air between the first radiation arm 1 and the second radiation arm 2. The first radiation arm 1 and the second radiation arm 2 are coupled through the first coupling path and generate a first coupling current. The second coupling path exists in the metal structure 3 between the first radiation arm 1 and the second radiation arm 2. The first radiation arm 1 and the second radiation arm 2 are coupled through the second coupling path and generate a second coupling current. Therefore, by adjusting the amplitude and phase of the second coupling current through the metal structure 3, the second coupling current can offset at least part of the first coupling current, thereby effectively improving the isolation between the first radiation arm 1 and the second radiation arm 2.

[0036] Among them, based on the amplitude and phase of the first coupling current, different amplitudes and phases of the second coupling current can offset the first coupling current to different degrees, that is, partially offset or completely offset. For example, when the first coupling current and the second coupling current have opposite phases and the same amplitudes, the first coupling current and the second coupling current can completely offset each other.

[0037] The radiation signal is used to stimulate a radiation current on the first radiation arm 1 and the second radiation arm 2, thereby realizing the radiation of electromagnetic waves to meet communication requirements. The specific type of the radiation signal can be set according to actual needs and is not limited to this. For example, the radiation signal can be a low-frequency signal, a medium-frequency signal, a medium-high frequency signal, a high-frequency signal, etc.

[0038] The first radiating arm 1 is used to radiate the radiation signal. The specific type of the first radiating arm 1 can be set according to actual needs and is not limited to this. For example, the first radiating arm 1 can be a printed metal pattern, for example: a metal pattern close to an "F" shape, so that the first radiating arm 1 can form a PIFA (Planar Inverted F-shaped Antenna). The grounding point of the first radiating arm 1 is located at one end of the first radiating arm 1 close to the second radiating arm 2, and the feeding point of the first radiating arm 1 is set close to the grounding point of the first radiating arm 1.

[0039] The second radiation arm 2 is used to radiate the radiation signal. The specific type of the second radiation arm 2 can be set according to actual needs and is not limited to this. For example, the second radiation arm 2 can be a printed metal pattern, for example: a metal pattern close to an "F" shape, so that the second radiation arm 2 can form a PIFA, and the grounding point of the second radiation arm 2 is located at one end of the second radiation arm 2 close to the first radiation arm 1, and the feeding point of the second radiation arm 2 is set close to the grounding point of the second radiation arm 2.

[0040] The metal structure 3 is used for coupling between the first radiation arm 1 and the second radiation arm 2 and generating a second coupling current so as to utilize the second coupling current to offset at least part of the first coupling current. The specific type of the metal structure 3 can be set according to actual needs and is not limited to this. For example, the metal structure 3 can be a printed metal pattern, for example: a metal pattern close to a "T" shape.

[0041] like Figure 2 and Figure 4 As shown, in some embodiments, the metal structure 3 includes a first metal 31 and a second metal 32, the first metal 31 is arranged between the first radiation arm 1 and the second radiation arm 2, and the first metal 31 and the first radiation arm 1 are coupled, the second metal 32 is arranged between the first radiation arm 1 and the second radiation arm 2, and the second metal 32 and the second radiation arm 2 are coupled, wherein an end of the first metal 31 away from the first radiation arm 1 and an end of the second metal 32 away from the second radiation arm 2 are connected.

[0042] It can be understood that, since the first metal 31 and the second metal 32 are respectively arranged between the first radiation arm 1 and the second radiation arm 2, and the first metal 31 and the second metal 32 connected to each other are respectively coupled with the first radiation arm 1 and the second radiation arm 2, the first radiation arm 1 and the second radiation arm 2 can be coupled through the first metal 31 and the second metal 32 and generate a second coupling current, so that the second coupling current can offset at least part of the first coupling current, thereby effectively reducing or even eliminating the influence of the first coupling current on the first radiation arm 1 and the second radiation arm 2, and improving the isolation between the first radiation arm 1 and the second radiation arm 2.

[0043] It should be noted that the first metal 31 is used for coupling the metal structure 3 and the first radiation arm 1 , and the specific type of the first metal 31 can be set according to actual needs and is not limited thereto.

[0044] The second metal 32 is used for coupling between the metal structure 3 and the second radiation arm 2 . The specific type of the second metal 32 can be set according to actual needs and is not limited thereto.

[0045] In some embodiments, the length of the first metal 31 is one quarter of the wavelength of the radiation signal, and / or the length of the second metal 32 is one quarter of the wavelength of the radiation signal.

[0046] It can be understood that since the length of the first metal 31 is one quarter of the wavelength of the radiation signal, when the feeding point of the first radiation arm 1 is connected to the radiation signal, the first metal 31 can be efficiently coupled with the first radiation arm 1, and the second coupling current can be stably coupled between the first radiation arm 1 and the second radiation arm 2, thereby ensuring the stable offset of the first coupling current by the second coupling current, thereby effectively improving the radiation performance of the antenna module.

[0047] Since the length of the second metal 32 is one quarter of the wavelength of the radiation signal, when the feeding point of the second radiation arm 2 is connected to the radiation signal, the second metal 32 can be efficiently coupled with the second radiation arm 2, and the second coupling current can be stably coupled between the first radiation arm 1 and the second radiation arm 2, thereby ensuring the stable offset of the first coupling current by the second coupling current, thereby effectively improving the radiation performance of the antenna module.

[0048] It should be noted that only the length of the first metal 31 can be one quarter of the wavelength of the radiation signal, and the second metal 32 can be set arbitrarily, or only the length of the second metal 32 can be one quarter of the wavelength of the radiation signal, and the first metal 31 can be set arbitrarily. There is no limitation on this. Preferably, the length of the first metal 31 and the length of the second metal 32 are respectively one quarter of the wavelength of the radiation signal.

[0049] like Figure 2 and Figure 4 As shown, in some embodiments, the first metal 31 is distributed in a serpentine shape at one end close to the first radiation arm 1 , and / or the second metal 32 is distributed in a serpentine shape at one end close to the second radiation arm 2 .

[0050] It can be understood that since the first metal 31 is distributed in a serpentine shape near one end of the first radiation arm 1, not only does the first metal 31 have a larger coupling area, ensuring that the second coupling current can be stably coupled between the first radiation arm 1 and the second radiation arm 2, but the first metal 31 also has a smaller volume, thereby effectively reducing the space occupied by the antenna module, thereby utilizing the miniaturized design of the antenna module.

[0051] Since the second metal 32 is distributed in a serpentine shape near one end of the second radiation arm 2, not only does the second metal 32 have a larger coupling area, ensuring that the second coupling current can be stably coupled between the first radiation arm 1 and the second radiation arm 2, but the second metal 32 also has a smaller volume, thereby effectively reducing the space occupied by the antenna module, thereby utilizing the miniaturized design of the antenna module.

[0052] It should be noted that, only the end of the first metal 31 close to the first radiation arm 1 may be distributed in a serpentine shape, and the second metal 32 may be set arbitrarily; or only the end of the second metal 32 close to the second radiation arm 2 may be distributed in a serpentine shape, and the first metal 31 may be set arbitrarily. There is no limitation to this. Preferably, the end of the first metal 31 close to the first radiation arm 1 is distributed in a serpentine shape, and the end of the second metal 32 close to the second radiation arm 2 is distributed in a serpentine shape.

[0053] The form of the serpentine distribution can be set according to actual needs, and there is no limitation to this. For example, the serpentine distribution can be in an "S" shape, a "bow" shape, etc.

[0054] In some embodiments, the first metal 31 and the second metal 32 and the first radiation arm 1 and the second radiation arm 2 are symmetrically arranged along a set axis.

[0055] It can be understood that since the first radiating arm 1 and the second radiating arm 2 are symmetrically arranged along the set axis, the first radiating arm 1 and the second radiating arm 2 have the same radiation characteristics. Therefore, when the feeding point of the first radiating arm 1 is connected to the radiation signal and the feeding point of the second radiating arm 2 is connected to the radiation signal, the first radiating arm 1 and the second radiating arm 2 can emit the same radiation signal from different positions, thereby facilitating the reference and comparison between the radiation signal radiated by the first radiating arm 1 and the radiation signal radiated by the second radiating arm 2, thereby ensuring that the antenna module has high reliability and stability.

[0056] Since the first metal 31 and the second metal 32 are symmetrically arranged along the set axis, the first metal 31 and the second metal 32 have the same coupling characteristics. Therefore, when the feeding point of the first radiation arm 1 is connected to the radiation signal and the feeding point of the second radiation arm 2 is connected to the radiation signal, the first radiation arm 1 and the second radiation arm 2 can use the first metal 31 and the second metal 32 to stably couple out the second coupling current, thereby ensuring the stable offset of the first coupling current by the second coupling current, thereby effectively improving the radiation performance of the antenna module.

[0057] It should be noted that the direction and position of the axis can be set according to actual needs without any limitation. For example, the direction of the axis can be the x-axis direction, y-axis direction, etc. in the terminal device, and the position of the axis can be the middle position between the first radiation arm 1 and the second radiation arm 2.

[0058] like Figure 3 As shown, in some embodiments, the antenna module also includes a ground layer 33 and a gap 34, wherein the ground layer 33 is respectively connected to an end of the first radiation arm 1 close to the second radiation arm 2 and an end of the second radiation arm 2 close to the first radiation arm 1, and the gap 34 is arranged on the ground layer 33.

[0059] It can be understood that since the grounding layer 33 is respectively connected to one end of the first radiation arm 1 close to the second radiation arm 2 and one end of the second radiation arm 2 close to the first radiation arm 1, the first radiation arm 1 and the second radiation arm 2 can be grounded using the grounding layer 33, thereby ensuring that the excitation current can be stably generated on the first radiation arm 1 and the second radiation arm 2, thereby ensuring the stable radiation of the radiation signal by the antenna module.

[0060] At the same time, since the grounding layer 33 is respectively connected to one end of the first radiation arm 1 close to the second radiation arm 2 and one end of the second radiation arm 2 close to the first radiation arm 1, and the gap 34 is arranged on the grounding layer 33, the first radiation arm 1 and the second radiation arm 2 can be coupled through the gap 34 and generate a second coupling current, so that the second coupling current can offset at least part of the first coupling current, thereby effectively reducing or even eliminating the influence of the first coupling current on the first radiation arm 1 and the second radiation arm 2, and improving the isolation between the first radiation arm 1 and the second radiation arm 2.

[0061] It should be noted that when the first radiation arm 1 and the second radiation arm 2 are grounded using the same grounding layer 33, the first radiation arm 1 and the second radiation arm 2 will be coupled on the grounding layer 33 and generate a coupling current. In this embodiment, a third coupling path and a fourth coupling path will exist between the first radiation arm 1 and the second radiation arm 2. The third coupling path exists in the grounding layer 33 between the first radiation arm 1 and the second radiation arm 2. The first radiation arm 1 and the second radiation arm 2 are coupled through the third coupling path and a first coupling current is generated. The fourth coupling path exists in the gap 34 between the first radiation arm 1 and the second radiation arm 2. The first radiation arm 1 and the second radiation arm 2 are coupled through the fourth coupling path and a second coupling current is generated. Therefore, by adjusting the amplitude and phase of the second coupling current through the gap 34, the second coupling current can offset at least part of the first coupling current, thereby effectively improving the isolation between the first radiation arm 1 and the second radiation arm 2.

[0062] Among them, based on the amplitude and phase of the first coupling current, different amplitudes and phases of the second coupling current can offset the first coupling current to different degrees, that is, partially offset or completely offset. For example, when the first coupling current and the second coupling current have opposite phases and the same amplitudes, the first coupling current and the second coupling current can completely offset each other.

[0063] The grounding layer 33 is used for grounding the first radiation arm 1 and the second radiation arm 2, and can also be connected to the first metal 31 and the second metal 32 to achieve grounding of the first metal 31 and the second metal 32. The specific type of the grounding layer 33 can be set according to actual needs and is not limited to this. For example, the grounding layer 33 can be a printed metal layer, for example: a metal layer close to a "rectangular" shape.

[0064] The slot 34 is used for coupling between the first radiation arm 1 and the second radiation arm 2 and generating a second coupling current so as to utilize the second coupling current to offset at least part of the first coupling current. The specific type of the slot 34 can be set according to actual needs and is not limited to this. For example, the slot 34 can be a slot structure formed on the ground layer 33 and having a regular shape, for example: a slot close to a "C" shape, or a slot structure of other irregular shapes.

[0065] like Figure 4 As shown, in some embodiments, the slot 34 includes a first slot 341 and a second slot 342, the first slot 341 is arranged on a side of the ground layer 33 close to the first radiation arm 1, and the first slot 341 extends in a direction away from the first radiation arm 1 after being bent, the second slot 342 is arranged on a side of the ground layer 33 close to the second radiation arm 2, and the second slot 342 extends in a direction away from the second radiation arm 2 after being bent, wherein an end of the first slot 341 away from the first radiation arm 1 is connected to an end of the second slot 342 away from the second radiation arm 2.

[0066] It can be understood that since the first slot 341 is arranged on a side of the grounding layer 33 close to the first radiation arm 1, and the second slot 342 is arranged on a side of the grounding layer 33 close to the second radiation arm 2, an end of the first slot 341 away from the first radiation arm 1 and an end of the second slot 342 away from the second radiation arm 2 are connected, so that the first radiation arm 1 and the second radiation arm 2 can be coupled through the first slot 341 and the second slot 342 and generate a second coupling current, so that the second coupling current can offset at least part of the first coupling current, thereby effectively reducing or even eliminating the influence of the first coupling current on the first radiation arm 1 and the second radiation arm 2, and improving the isolation between the first radiation arm 1 and the second radiation arm 2.

[0067] It should be noted that the first slot 341 is used for coupling the first radiation arm 1 and the second radiation arm 2 , and the specific type of the first slot 341 can be set according to actual needs and is not limited thereto.

[0068] The second slot 342 is used for coupling between the first radiation arm 1 and the second radiation arm 2 . The specific type of the second slot 342 can be set according to actual needs and is not limited thereto.

[0069] In some embodiments, the length of the first slot 341 is one quarter of the wavelength of the radiation signal, and / or the length of the second slot 342 is one quarter of the wavelength of the radiation signal.

[0070] It can be understood that since the length of the first slot 341 is one quarter of the wavelength of the radiation signal, when the feeding point of the first radiation arm 1 is connected to the radiation signal, the first radiation arm 1 and the second radiation arm 2 can utilize the first slot 341 to efficiently and stably couple the second coupling current, thereby ensuring the stable offset of the first coupling current by the second coupling current, thereby effectively improving the radiation performance of the antenna module.

[0071] Since the length of the second slot 342 is one quarter of the wavelength of the radiation signal, when the feeding point of the second radiation arm 2 is connected to the radiation signal, the second slot 342 can be used to efficiently and stably couple the second coupling current between the first radiation arm 1 and the second radiation arm 2, thereby ensuring the stable offset of the first coupling current by the second coupling current, thereby effectively improving the radiation performance of the antenna module.

[0072] It should be noted that, only the length of the first slot 341 can be one quarter of the wavelength of the radiation signal, and the second slot 342 can be set arbitrarily, or only the length of the second slot 342 can be one quarter of the wavelength of the radiation signal, and the first slot 341 can be set arbitrarily. There is no limitation on this. Preferably, the length of the first slot 341 and the length of the second slot 342 are respectively one quarter of the wavelength of the radiation signal, that is, the length of the slot 34 is half the wavelength of the radiation signal.

[0073] In some embodiments, the first slot 341 and the second slot 342 and the first radiation arm 1 and the second radiation arm 2 are symmetrically arranged along a set axis.

[0074] It can be understood that since the first radiating arm 1 and the second radiating arm 2 are symmetrically arranged along the set axis, the first radiating arm 1 and the second radiating arm 2 have the same radiation characteristics. Therefore, when the feeding point of the first radiating arm 1 is connected to the radiation signal and the feeding point of the second radiating arm 2 is connected to the radiation signal, the first radiating arm 1 and the second radiating arm 2 can emit the same radiation signal from different positions, thereby facilitating the reference and comparison between the radiation signal radiated by the first radiating arm 1 and the radiation signal radiated by the second radiating arm 2, thereby ensuring that the antenna module has high reliability and stability.

[0075] Since the first slot 341 and the second slot 342 are symmetrically arranged along a set axis, the first slot 341 and the second slot 342 have the same coupling characteristics. Therefore, when the feeding point of the first radiation arm 1 is connected to the radiation signal and the feeding point of the second radiation arm 2 is connected to the radiation signal, the first radiation arm 1 and the second radiation arm 2 can utilize the first slot 341 and the second slot 342 to stably couple out the second coupling current, thereby ensuring the stable offset of the first coupling current by the second coupling current, thereby effectively improving the radiation performance of the antenna module.

[0076] like Figure 2 and Figure 4 As shown, in some embodiments, one end of the first radiation arm 1 away from the second radiation arm 2 is distributed in a serpentine shape, and / or one end of the second radiation arm 2 away from the first radiation arm 1 is distributed in a serpentine shape.

[0077] It can be understood that since the end of the first radiating arm 1 away from the second radiating arm 2 is distributed in a serpentine shape, not only the first radiating arm 1 has a larger radiation area to ensure efficient radiation of the first radiating arm 1, but also the first radiating arm 1 has a smaller volume, thereby effectively reducing the space occupied by the antenna module, thereby utilizing the miniaturized design of the antenna module.

[0078] Since the end of the second radiation arm 2 away from the first radiation arm 1 is distributed in a serpentine shape, not only the second radiation arm 2 has a larger radiation area to ensure efficient radiation of the second radiation arm 2, but also the second radiation arm 2 has a smaller volume, thereby effectively reducing the space occupied by the antenna module, thereby utilizing the miniaturized design of the antenna module.

[0079] It should be noted that only the end of the first radiation arm 1 away from the second radiation arm 2 may be serpentine-shaped and the second radiation arm 2 may be arbitrarily set; or only the end of the second radiation arm 2 away from the first radiation arm 1 may be serpentine-shaped and the first radiation arm 1 may be arbitrarily set. There is no limitation to this. Preferably, the end of the first radiation arm 1 away from the second radiation arm 2 is serpentine-shaped and the end of the second radiation arm 2 away from the first radiation arm 1 is serpentine-shaped.

[0080] In some embodiments, the radiated signal includes a 2.4 GHz frequency band signal.

[0081] It can be understood that since the radiated signal includes a 2.4 GHz frequency band signal, the first radiating arm 1 and the second radiating arm 2 can radiate 2.4 GHz frequency band signals respectively, thereby meeting the Bluetooth communication requirements. At the same time, by using the reference and comparison between the 2.4 GHz frequency band signal radiated by the first radiating arm 1 and the 2.4 GHz frequency band signal radiated by the second radiating arm 2, it can be ensured that the Bluetooth communication has high reliability and stability.

[0082] like Figure 4 As shown, in some embodiments, the antenna module further includes a dielectric plate 4 , and the first radiation arm 1 , the second radiation arm 2 and the metal structure 3 are respectively arranged on the dielectric plate 4 .

[0083] It can be understood that since the first radiation arm 1, the second radiation arm 2 and the metal structure 3 are respectively arranged on the dielectric plate 4, the antenna module utilizes the dielectric plate 4 to realize the support and integration of the first radiation arm 1, the second radiation arm 2 and the metal structure 3, thereby facilitating the disassembly and assembly of the antenna module.

[0084] It should be noted that the dielectric plate 4 is used to carry the first radiation arm 1, the second radiation arm 2 and the metal structure 3, and it can also carry the grounding layer 33. The specific type of the dielectric plate 4 can be set according to actual needs and is not limited to this. For example, the dielectric plate 4 is made of an insulating lightweight material, and the first radiation arm 1, the second radiation arm 2, the metal structure 3 and the grounding layer 33 can all be printed on the dielectric plate 4.

[0085] Based on the antenna module of the embodiment of the present disclosure, simulation is performed to obtain the following Figure 5 The S parameter graph shown in Figure 5 There are four curves in total, namely S(1,1), S(1,2), S(2,1) and S(2,2). Among them, in the 2.4GHz frequency band, the one with the largest ordinate value is S(2,2), the one with the smallest ordinate value is the overlapping S(1,2) and S(2,1), and the remaining one is S(1,1). Figure 5 It can be seen that the antenna module achieves a return loss matching of more than 15dB in the 2.4GHz-2.5GHz frequency band, while maintaining an isolation of more than 20dB.

[0086] The embodiment of the present disclosure also provides a terminal device, including an antenna module as in the embodiment of the present disclosure.

[0087] It can be understood that, since the feeding point of the first radiation arm 1 is connected to the radiation signal, the first radiation arm 1 can be stimulated to emit a radiation current, thereby radiating the radiation signal, thereby meeting the communication requirements. At the same time, since the feeding point of the second radiation arm 2 is connected to the radiation signal, the second radiation arm 2 can be stimulated to emit a radiation current, thereby radiating the radiation signal, thereby meeting the communication requirements. Among them, since the positions of the first radiation arm 1 and the second radiation arm 2 are different, the propagation paths of the radiation signal radiated by the first radiation arm 1 and the radiation signal radiated by the second radiation arm 2 are different. Therefore, the radiation signal radiated by the first radiation arm 1 and the radiation signal radiated by the second radiation arm 2 have different attenuations, and the changes in parameters such as amplitude and phase are different. Therefore, the radiation signal radiated by the first radiation arm 1 and the radiation signal radiated by the second radiation arm 2 can be used as a reference and comparison with each other, thereby ensuring that the antenna module has high reliability and stability.

[0088] At the same time, since the first radiation arm 1 and the second radiation arm 2 are coupled and generate the first coupling current, the isolation between the first radiation arm 1 and the second radiation arm 2 is low, which will cause the performance of the antenna module to deteriorate. However, since the first radiation arm 1 and the second radiation arm 2 are also coupled through the metal structure 3 and generate the second coupling current, the second coupling current can offset at least part of the first coupling current, thereby effectively reducing or even eliminating the influence of the first coupling current on the first radiation arm 1 and the second radiation arm 2, thereby improving the isolation between the first radiation arm 1 and the second radiation arm 2. As a result, the antenna module can be provided with the first radiation arm 1 and the second radiation arm 2 in a relatively small space, and can also ensure that the first radiation arm 1 and the second radiation arm 2 have high radiation performance, thereby meeting the requirements of efficient and stable communication.

[0089] It should be noted that the specific type of the terminal device can be set according to actual needs, and there is no limitation on this. For example, the terminal device can be a mobile phone, a tablet computer, a wearable smart device, or a key. Among them, the key can be a fob key, that is, a smart key, which uses an antenna module to achieve Bluetooth positioning.

[0090] In the description of the present disclosure, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, in the description of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0091] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present disclosure includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.

[0092] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0093] Although the embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. An antenna module, characterized in that: include: A first radiation arm (1), a second radiation arm (2) and a metal structure (3); The feeding point of the first radiation arm (1) and the feeding point of the second radiation arm (2) are respectively connected to the radiation signal, and the first radiation arm (1) and the second radiation arm (2) are coupled to generate a first coupling current; The metal structure (3) is arranged between the first radiation arm (1) and the second radiation arm (2), and the first radiation arm (1) and the second radiation arm (2) are coupled through the metal structure (3) and generate a second coupling current, and the second coupling current offsets at least a part of the first coupling current.

2. The antenna module according to claim 1, characterized in that: The metal structure (3) comprises: A first metal (31), wherein the first metal (31) is arranged between the first radiation arm (1) and the second radiation arm (2), and the first metal (31) and the first radiation arm (1) are coupled; A second metal (32), wherein the second metal (32) is disposed between the first radiation arm (1) and the second radiation arm (2), and the second metal (32) and the second radiation arm (2) are coupled; Wherein, an end of the first metal (31) away from the first radiation arm (1) and an end of the second metal (32) away from the second radiation arm (2) are connected.

3. The antenna module according to claim 2, characterized in that: The length of the first metal (31) is one quarter of the wavelength of the radiation signal; and / or The length of the second metal (32) is one quarter of the wavelength of the radiation signal.

4. The antenna module according to claim 2, characterized in that: The first metal (31) is distributed in a serpentine shape at one end close to the first radiation arm (1); and / or The second metal (32) is distributed in a serpentine shape at one end close to the second radiation arm (2).

5. The antenna module according to claim 2, characterized in that: The first metal (31) and the second metal (32) as well as the first radiation arm (1) and the second radiation arm (2) are respectively arranged symmetrically along a set axis.

6. The antenna module according to any one of claims 1 to 5, characterized in that: The metal structure (3) comprises: A ground layer (33) and a gap (34); The grounding layer (33) is respectively connected to an end of the first radiation arm (1) close to the second radiation arm (2) and an end of the second radiation arm (2) close to the first radiation arm (1), and the gap (34) is arranged on the grounding layer (33).

7. The antenna module according to claim 6, characterized in that: The gap (34) comprises: A first slot (341), the first slot (341) being arranged on a side of the ground layer (33) close to the first radiation arm (1), and the first slot (341) being bent and extending in a direction away from the first radiation arm (1); A second slot (342), the second slot (342) being arranged on a side of the ground layer (33) close to the second radiation arm (2), and the second slot (342) being bent and extending in a direction away from the second radiation arm (2); Wherein, an end of the first slot (341) away from the first radiation arm (1) and an end of the second slot (342) away from the second radiation arm (2) are connected.

8. The antenna module according to claim 7, characterized in that: The length of the first slit (341) is one quarter of the wavelength of the radiation signal; and / or The length of the second slot (342) is one quarter of the wavelength of the radiation signal.

9. The antenna module according to claim 7, characterized in that: The first slot (341) and the second slot (342) as well as the first radiation arm (1) and the second radiation arm (2) are respectively arranged symmetrically along a set axis.

10. The antenna module according to claim 1, characterized in that: An end of the first radiation arm (1) away from the second radiation arm (2) is distributed in a serpentine shape; and / or An end of the second radiation arm (2) away from the first radiation arm (1) is distributed in a serpentine shape.

11. The antenna module according to claim 1, characterized in that: The radiation signal includes: a 2.4 GHz frequency band signal.

12. The antenna module according to claim 1, characterized in that: The antenna module also includes: A dielectric plate (4), wherein the first radiation arm (1), the second radiation arm (2) and the metal structure (3) are respectively arranged on the dielectric plate (4).

13. A terminal device, characterized in that: include: The antenna module as claimed in any one of claims 1 to 12.

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