Electronic terminal cover plate assembly and communication terminal

Abstract

The utility model relates to the technical field of electronic terminals, and discloses an electronic terminal cover plate assembly and a communication terminal.The electronic terminal cover plate assembly comprises a first antenna, a second antenna and a non-metal cover plate; the first antenna is adjacent to the second antenna; the non-metal cover plate is electrically connected between the first antenna and the second antenna, and a decoupling structure is integrated on the non-metal cover plate and is used for carrying out decoupling processing on the first antenna and the second antenna. According to the utility model, the decoupling structure is integrated on the non-metal cover plate, the decoupling structure does not occupy the internal space of the mobile terminal, and the mobile terminal does not need to reserve a grounding space for the decoupling structure, so that the technical problem that the antennas in the mobile terminal are too close to each other and are mutually coupled to form interference is solved, and the antenna performance is improved; and the antenna can be arranged in the mobile terminal more flexibly.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic terminals, in particular to an electronic terminal cover plate component and a communication terminal. Background Art

[0002] With the development of mobile communications, users have higher and higher demands for high-quality communications. Correspondingly, users have higher and higher requirements for mobile terminals. The application of 5G has greatly improved the communication rate, but the number of corresponding antennas has also increased greatly. The limited size of mobile terminals makes antenna layout more difficult. Designing enough antennas in a limited space often leads to antenna interference. Antennas that are close to each other couple with each other to form interference, affecting the final antenna performance. In order to decouple between antennas, a certain space needs to be left between the two antennas to allow the decoupling circuit to be grounded. Generally, at least 3-5mm is left, which has a great impact on antenna design and space utilization. Utility Model Content

[0003] In order to solve the technical problems existing in the prior art, the main purpose of the utility model is to provide an electronic terminal cover assembly and a communication terminal. By integrating the decoupling structure on the non-metallic cover, the decoupling structure does not occupy the internal space of the mobile terminal, and the mobile terminal does not need to reserve grounding space for the decoupling structure. It not only solves the technical problem of interference caused by mutual coupling due to the close distance between antennas in the mobile terminal, improves the antenna performance, but also makes the arrangement of antennas in the mobile terminal more flexible.

[0004] In order to achieve the above utility model purpose, the utility model adopts the following technical solutions:

[0005] According to one aspect of the utility model, an electronic terminal cover plate assembly is provided, comprising: a first antenna, a second antenna, and a non-metallic cover plate; the first antenna and the second antenna are adjacent to each other; the non-metallic cover plate is electrically connected between the first antenna and the second antenna, wherein a decoupling structure is integrated on the non-metallic cover plate for decoupling the first antenna and the second antenna.

[0006] According to an embodiment of the present utility model, the decoupling structure includes a decoupling circuit, and an input end and an output end of the decoupling circuit are respectively loaded onto a body of the first antenna and a body of the second antenna.

[0007] According to an embodiment of the present utility model, the decoupling circuit is connected between the first antenna and the second antenna through a spring and / or a conductive foam.

[0008] According to an embodiment of the present invention, the first antenna and the second antenna form a two-port network, and the equivalent reactance of the decoupling circuit is equal to and opposite to the imaginary part of the admittance parameter of the two-port network.

[0009] According to one embodiment of the present utility model, the admittance parameter is calculated using the following formula: Y21=I1 / V2, wherein Y21 is the admittance parameter, the two-port network includes a first port and a second port, wherein the first port corresponds to the first antenna, the second port corresponds to the second antenna, I1 is the current of the first port, and V2 is the voltage of the second port.

[0010] According to one embodiment of the present invention, the decoupling circuit is electroplated or chemically plated on the surface of the non-metallic cover plate.

[0011] According to an embodiment of the present invention, the first antenna and the second antenna include at least one common frequency band.

[0012] According to another aspect of the present invention, a communication terminal is provided, comprising the electronic terminal cover plate assembly.

[0013] According to an embodiment of the present utility model, the communication terminal further includes: a frequency detection unit, configured to detect the operating frequencies of the first antenna and the second antenna.

[0014] According to one embodiment of the utility model, the communication terminal also includes a control unit connected to the frequency detection unit, for sending a decoupling enable signal to the non-metallic cover plate when the frequency detection unit detects that the first antenna and the second antenna have mutually coupled frequencies.

[0015] It can be seen from the above technical solution that the advantages and positive effects of an electronic terminal cover assembly and a communication terminal of the utility model are:

[0016] By integrating the decoupling structure into the non-metallic cover, the decoupling structure does not occupy the internal space of the mobile terminal, and the mobile terminal does not need to reserve grounding space for the decoupling structure. This not only solves the technical problem of interference caused by mutual coupling due to the close distance between antennas in the mobile terminal, improves antenna performance, but also makes the arrangement of antennas in the mobile terminal more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 is a schematic diagram of an electronic terminal cover assembly according to an embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of S parameters of the electronic terminal cover assembly of an embodiment of the utility model before decoupling;

[0021] Figure 3 This is a schematic diagram of S parameters of the electronic terminal cover assembly after decoupling according to an embodiment of the utility model;

[0022] Figure 4 is a cross-sectional view of a communication terminal according to an embodiment of the utility model;

[0023] Figure 5 It is a Y parameter schematic diagram of the electronic terminal cover assembly of the embodiment of the utility model. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] With the development of mobile communications, users have an increasingly higher demand for high-quality communications. Correspondingly, users have higher and higher requirements for mobile terminals. The application of 5G has greatly improved the communication rate, but the corresponding number of antennas has also increased greatly. The limited size of mobile terminals makes antenna layout more difficult. Designing enough antennas in a limited space often leads to antenna interference problems. Antennas that are close to each other couple with each other to form interference, affecting the final antenna performance.

[0026] According to one aspect of the utility model, an electronic terminal cover plate assembly is provided. Figure 1 Schematic diagram of an electronic terminal cover assembly according to an embodiment of the present utility model. Figure 1As shown, it includes: a first antenna 1, a second antenna 2, and a non-metallic cover plate 3; the first antenna 1 and the second antenna 2 are adjacent to each other; the non-metallic cover plate 3 is electrically connected between the first antenna 1 and the second antenna 2, and a decoupling structure is integrated on the non-metallic cover plate for decoupling the first antenna 1 and the second antenna 2.

[0027] Optionally, the non-metallic cover plate 3 may be made of non-metallic materials such as glass, gemstone, plastic, etc.

[0028] Optionally, Figure 2 : is a schematic diagram of S parameters of the electronic terminal cover assembly of the embodiment of the utility model before decoupling, such as Figure 2 As shown, when the non-metallic cover is not electrically connected between the first antenna and the second antenna to decouple the first antenna and the second antenna, the electronic terminal cover assembly operates at a frequency of 2.45 GHZ, and the S21 parameter of the electronic terminal cover assembly is -4 dB; wherein S21 represents the degree of coupling between the antennas, and is used to judge the degree of coupling between the antennas. When judging the degree of coupling between the antennas, it is hoped that the smaller the S21, the better the communication quality of the antenna, and usually required to be below -15 dB. Therefore, when the non-metallic cover is not used to decouple the first antenna and the second antenna, when the first antenna and the second antenna operate at a frequency of 2.45 GHZ, there is great interference between the first antenna and the second antenna, which will seriously affect the antenna efficiency.

[0029] Optionally, Figure 3 : is a schematic diagram of the S parameters of the electronic terminal cover assembly after decoupling according to an embodiment of the utility model, such as Figure 3 As shown, when the non-metallic cover plate is electrically connected between the first antenna and the second antenna and the first antenna and the second antenna are decoupled, the electronic terminal cover plate assembly operates at a frequency of 2.45 GHZ, and the S21 parameter of the electronic terminal cover plate assembly is -28 dB, which is 24 dB lower than that without a decoupling device. There is little mutual interference between the first antenna and the second antenna, and the antenna efficiency is significantly optimized.

[0030] The electronic terminal cover assembly of this embodiment integrates the decoupling structure on the non-metallic cover. The decoupling structure does not need to reserve ground space, and the interval between the two antennas can be more than 1 mm. The decoupling structure does not take up the space of the mobile terminal. At the same time, it can solve the technical problem of interference caused by mutual coupling between antennas in the mobile terminal due to the close distance, improve the antenna performance, and make the arrangement of antennas in the mobile terminal more flexible.

[0031] According to an embodiment of the present invention, the first antenna and the second antenna include at least one common frequency band. The first antenna operates in a first frequency band range, and the second antenna operates in a second frequency band range. The first frequency band range and the second frequency band range have at least one overlapping frequency band, that is, a common frequency band.

[0032] Optionally, the first antenna and the second antenna have the same resonant frequency. The resonant frequency refers to the frequency at which the first antenna or the second antenna resonates or self-oscillates under specific conditions, and is determined by circuit elements (such as inductance, capacitance) and power supplies corresponding to the first antenna and the second antenna, respectively.

[0033] According to one embodiment of the utility model, the decoupling structure includes a decoupling circuit, the input end of the decoupling circuit is loaded on the body of the first antenna, and the output end is loaded on the body of the second antenna, or the input end of the decoupling circuit is loaded on the body of the second antenna, and the output end is loaded on the body of the first antenna.

[0034] Optionally, by connecting the decoupling circuit to the feeding point of the antenna, the decoupling circuit can form a path for decoupling the first antenna and the second antenna. At the same time, the decoupling circuit is integrated on the non-metallic cover plate, which can effectively save space in the mobile terminal. The non-metallic cover plate has good insulation performance and can avoid interference with the decoupling circuit by other electrical signals.

[0035] According to an embodiment of the present utility model, the decoupling circuit is connected between the first antenna and the second antenna through a spring and / or a conductive foam.

[0036] Optionally, Figure 4 is a cross-sectional view of a communication terminal according to an embodiment of the present utility model, Figure 4 As shown, the shrapnel 5 or the conductive foam 5 is filled between the non-metallic cover plate 3 and the antenna 1 and the antenna 2, wherein the antenna 1 and the antenna 2 are connected to the main board 4 through the shrapnel 5 or the conductive foam 5, and then the main board 4 is connected to the decoupling circuit of the non-metallic cover plate 3 through the shrapnel 5 or the conductive foam 5. The metal shrapnel has good elasticity and conductivity, which can ensure stable contact between the decoupling circuit and the antenna, and can be bent to adapt to installation spaces of different sizes. The conductive foam can be used to fill the tiny gap between the decoupling circuit and the antenna to ensure the stability of the electrical connection. At the same time, it can also reduce the impact of vibration or impact on the electrical connection, and the cost is low.

[0037] According to an embodiment of the present invention, the first antenna and the second antenna form a two-port network, and the equivalent reactance of the decoupling circuit is equal to and opposite to the imaginary part of the admittance parameter of the two-port network.

[0038] Optionally, the equivalent reactance includes capacitive reactance and inductive reactance. In an AC circuit (such as a series RLC circuit), capacitors and inductors also hinder the current. In AC circuit analysis, reactance is represented by X, which is the imaginary part of the complex impedance and is used to represent the hindering effect of inductance and capacitance on the current.

[0039] Optionally, the admittance parameter (Y parameter) of the two-port network is a matrix describing the characteristics of the two-port network, which includes a real part and an imaginary part. The real part is represented by Y(Re), and the imaginary part is usually related to the reactance (including inductance and capacitance) of the network, represented by Y(Im). Figure 5 is a Y parameter schematic diagram of the electronic terminal cover assembly of the utility model embodiment, such as Figure 5 As shown, when the non-metallic cover is electrically connected between the first antenna and the second antenna, and the first antenna and the second antenna are decoupled, the electronic terminal cover assembly operates at a frequency of 2.45 GHz, and the Y parameter approaches 0, corresponding to Figure 3 The S21 parameter of the electronic terminal cover assembly is -28dB, which is 24dB lower than that without a decoupling device. There is little mutual interference between the first antenna and the second antenna, and the antenna efficiency is significantly optimized.

[0040] According to one embodiment of the present utility model, the admittance parameter is calculated using the following formula: Y21=I1 / V2, wherein Y21 is the admittance parameter, the two-port network includes a first port and a second port, wherein the first port corresponds to the first antenna, the second port corresponds to the second antenna, I1 is the current of the first port, and V2 is the voltage of the second port.

[0041] Optionally, the coupling degree between the first antenna and the second antenna is represented by an isolation degree S21, wherein S21 is an S parameter in a two-port network, and the S parameter in the two-port network represents a ratio of a power b1 received by the first port to a power a2 input by the second port, that is, b1 / a2. In the two-port network, Therefore, if you want S21 to be 0, you only need to make the admittance parameter Y21 0; in a two-port network, the Y parameter represents the relationship between the voltage v1 and current I1 of the first port and the voltage v2 and current I2 of the second port, Y11 = I1 / v1, Y12 = I2 / v1, Y21 = I1 / v2, Y22 = I2 / v2.

[0042] According to one embodiment of the present invention, the decoupling circuit is electroplated or chemically plated on the surface of the non-metallic cover plate.

[0043] Optionally, a decoupling circuit pattern suitable for electroplating or chemical plating on the surface of the non-metallic cover plate is designed according to the circuit layout, electronic components, etc., and then the oil, oxides and other impurities on the surface of the non-metallic cover plate are removed, and the roughness of the surface of the non-metallic cover plate is increased. After the pretreatment is completed, the decoupling circuit pattern is electroplated or chemically plated on the surface of the non-metallic cover plate. After the electroplating or chemical plating is completed, it is necessary to conduct simulation experiments on the decoupling circuit to ensure that the quality and performance of the decoupling circuit can meet the expected requirements.

[0044] According to another aspect of the present invention, a communication terminal is provided, comprising the electronic terminal cover assembly. The communication terminal may be a notebook, a mobile phone, a tablet device, etc.

[0045] According to an embodiment of the present utility model, the communication terminal further includes: a frequency detection unit, configured to detect the operating frequencies of the first antenna and the second antenna.

[0046] According to one embodiment of the utility model, the communication terminal also includes: a control unit, connected to the frequency detection unit, for sending a decoupling enable signal to the non-metallic cover plate when the frequency detection unit detects that the first antenna and the second antenna have a mutually coupled frequency.

[0047] In this embodiment, the control unit can be the central processing unit of the communication terminal, or it can be the control unit of the antenna, radio frequency module, and communication module, which is connected to the decoupling circuit on the non-metallic cover. By sending a decoupling enable signal, the decoupling circuit on the non-metallic cover works, the first antenna and the second antenna are decoupled, and the interference between the first antenna and the second antenna is reduced, thereby improving the antenna communication quality of the communication terminal.

[0048] It should be noted that, in this article, relationships such as "first", "second", etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises", or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0049] The above description is only a specific embodiment of the utility model, so that those skilled in the art can understand or implement the utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features of the utility model described herein.

Claims

1. An electronic terminal cover assembly, characterized in that: include: A first antenna, a second antenna, and a non-metallic cover; The first antenna and the second antenna are adjacent to each other; The non-metallic cover is electrically connected between the first antenna and the second antenna, wherein a decoupling structure is integrated on the non-metallic cover for decoupling the first antenna and the second antenna.

2. The electronic terminal cover plate assembly according to claim 1, characterized in that: The decoupling structure includes a decoupling circuit, and an input end and an output end of the decoupling circuit are respectively loaded onto a body of the first antenna and a body of the second antenna.

3. The electronic terminal cover plate assembly according to claim 2, characterized in that: The decoupling circuit is connected between the first antenna and the second antenna through a spring and / or conductive foam.

4. The electronic terminal cover plate assembly according to claim 2, characterized in that: The first antenna and the second antenna form a two-port network, and the equivalent reactance of the decoupling circuit is equal to and opposite to the imaginary part of the admittance parameter of the two-port network.

5. The electronic terminal cover plate assembly according to claim 4, characterized in that: The admittance parameter is calculated using the following formula: 21 =I1 / V2, where Y 21 is the admittance parameter, the two-port network includes a first port and a second port, wherein the first port corresponds to the first antenna, the second port corresponds to the second antenna, I1 is the current of the first port, and V2 is the voltage of the second port.

6. The electronic terminal cover plate assembly according to claim 2, characterized in that: The decoupling circuit is electroplated or chemically plated on the surface of the non-metallic cover plate.

7. The electronic terminal cover plate assembly according to claim 1, characterized in that: The first antenna and the second antenna include at least one common frequency band.

8. A communication terminal, characterized in that: The communication terminal comprises the electronic terminal cover plate assembly according to any one of claims 1 to 7.

9. The communication terminal according to claim 8, characterized in that: The communication terminal further includes: a frequency detection unit, configured to detect operating frequencies of the first antenna and the second antenna.

10. The communication terminal according to claim 9, characterized in that: The communication terminal also includes a control unit connected to the frequency detection unit, and configured to send a decoupling enable signal to the non-metallic cover plate when the frequency detection unit detects that the first antenna and the second antenna have mutually coupled frequencies.

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