Miniaturized antenna with reference ground isolation branch structure and electronic equipment

Abstract

The utility model discloses a miniaturized antenna with a reference ground isolation branch knot structure and electronic equipment, and the miniaturized antenna with the reference ground isolation branch knot structure comprises a main set antenna, a diversity antenna, and an isolation branch knot structure which is used for optimizing the isolation degree of the main set antenna and the diversity antenna and is provided with a reference ground, the main set antenna is located at one end of the antenna structure and is connected with the grounding aluminum foil through the first grounding copper foil. The diversity antenna is located at the other end of the antenna structure and is connected with the grounding aluminum foil through the second grounding copper foil; and the isolation branch structure with the reference ground is arranged between the main set antenna and the diversity antenna of the antenna, is connected with the grounding aluminum foil through the third grounding copper foil, and is connected with the main set antenna or the diversity antenna. According to the invention, coupling between antennas can be reduced.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of antenna technology, and in particular to a miniaturized antenna and electronic device with a reference ground isolation branch structure. Background Art

[0002] As the notebook computer environment becomes increasingly complex, most projects do not have enough space to implement separate designs of primary and secondary antennas. RF (Radio Frequency) project teams can only adopt a combo antenna design solution.

[0003] Traditional combo antennas primarily consist of two resonant antenna traces: a main antenna and a diversity antenna. Each antenna is connected to a corresponding reference ground via a grounding copper foil. Generally, if the combo antenna is large enough and has a relatively uniform shape, and the physical distance between the two antennas is sufficient, the isolation between the main antenna and the diversity antenna can barely meet the required level.

[0004] However, as the overall environment of laptop computers becomes increasingly complex, many projects do not have enough space to ensure sufficient physical distance between the main antenna and the diversity antenna in the combo antenna. Some projects even have to make the combo antenna smaller and smaller due to structural interference. At the same time, due to the interference between the two electromagnetic hooks and the combo antenna, the combo antenna also needs to be shaped and designed into an irregular form to solve the interference problem.

[0005] Therefore, the biggest challenge currently facing combo antenna design is isolation, and the isolation problem faced by special-shaped antennas in special environments is even more serious. For example, the main antenna and diversity antenna of a traditional combo antenna generally use two grounding copper foils to connect to the reference ground. When the special-shaped design in the middle of the special-shaped antenna makes it impossible to route the wires, there is no way to optimize for better isolation. Utility Model Content

[0006] In view of this, an embodiment of the present application provides a miniaturized antenna with a reference ground isolation branch structure, which can at least solve the aforementioned technical problem of poor isolation.

[0007] According to an embodiment of the present application, a miniaturized antenna with a reference ground isolation branch structure is provided, comprising: a main antenna, a diversity antenna, and an isolation branch structure with a reference ground for optimizing the isolation between the main antenna and the diversity antenna, wherein:

[0008] The main antenna is located at one end of the antenna structure and is connected to the grounded aluminum foil through the first grounded copper foil;

[0009] The diversity antenna is located at the other end of the antenna structure and is connected to the grounded aluminum foil via a second grounded copper foil;

[0010] The isolation branch structure with reference ground is arranged between the main antenna and the diversity antenna of the antenna, is connected to the grounding aluminum foil through the third grounding copper foil, and is connected to the main antenna or the diversity antenna.

[0011] In some exemplary embodiments, the isolation branch structure with the reference ground is arranged along the special-shaped notch of the miniaturized antenna structure.

[0012] In some exemplary embodiments, the length of the isolation stub structure with the reference ground is related to the frequency at which the isolation is to be improved.

[0013] In some exemplary embodiments, the length of the isolation branch structure with the reference ground is 1 / 4 of the wavelength corresponding to the frequency for which the isolation is to be improved and optimized.

[0014] In some exemplary embodiments, the main antenna and the diversity antenna are both PIFA antennas, and are connected to the same grounding aluminum foil through a first grounding copper foil and a second grounding copper foil, respectively.

[0015] In some exemplary embodiments, the miniaturized antenna with the reference ground isolation branch structure is in the form of a common PCB assembly, with a length of 90 mm, a width of 7.65 mm, and a thickness of 0.4 mm.

[0016] In some exemplary embodiments, the PCB is made of FR-4 grade material with a dielectric constant of 4.3.

[0017] The present application also provides an electronic device, which includes the above-mentioned miniaturized antenna with a reference ground isolation branch structure.

[0018] In some exemplary embodiments, the miniaturized antenna with the reference ground isolation branch structure is located diagonally opposite to the mainboard of the electronic device, on one side of the battery.

[0019] In some exemplary embodiments, the metal sputtering layer on the inner side of the electronic device housing is cleared in the area corresponding to the miniaturized antenna.

[0020] The embodiments of the present application provide a miniaturized antenna with a reference ground isolation branch structure, under the condition that the overall antenna space is compressed. The antenna adopts a combo form, and the radiation routing of the main antenna and diversity antenna is carried out on the combo. It is also provided with a reference ground isolation branch structure, which achieves good isolation between the main antenna and diversity antenna at a smaller antenna size. Compared with the traditional form of separate main antenna and diversity antenna, the miniaturized antenna and electronic device with a reference ground isolation branch structure in the embodiments of the present application saves a piece of antenna grounding aluminum foil, reducing development costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0022] Figure 1 A schematic diagram showing the structure of a miniaturized antenna with a reference ground isolation branch structure according to an embodiment of the present application is shown;

[0023] Figure 2 A parameter diagram of a small antenna with a reference ground isolation branch structure according to an embodiment of the present application is shown;

[0024] Figure 3 A measurement diagram of a miniaturized antenna with a reference ground isolation branch structure according to an optional embodiment of the present application is shown;

[0025] Figure 4 A graph showing the isolation of a miniaturized antenna with a reference ground isolation branch structure and a common antenna according to an embodiment of the present application is shown;

[0026] Figure 5 An S-parameter curve diagram of a miniaturized antenna with a reference ground isolation branch structure according to an embodiment of the present application is shown;

[0027] Figure 6 An efficiency curve diagram of a miniaturized antenna with a reference ground isolation branch structure according to an embodiment of the present application is shown;

[0028] Figure 7 A schematic diagram of the structure of an electronic device according to an embodiment of the present application is shown;

[0029] Figure 8 A schematic diagram showing the structure of an electronic device after the battery is removed according to an embodiment of the present application is shown;

[0030] Figure 9 A partial three-dimensional diagram of an electronic device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0031] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0032] The essence of the technical solution of the embodiment of the present application is explained in detail below with reference to the accompanying drawings.

[0033] The embodiment of the present application provides a miniaturized antenna with a reference ground isolation branch structure through software simulation, debugging, and physical sampling. Figure 1 FIG. 1 shows a schematic diagram of the structure of a miniaturized antenna with a reference ground isolation branch structure according to an embodiment of the present application. Figure 1 As shown, the miniaturized antenna with a reference ground isolation branch structure according to an embodiment of the present application includes: a main antenna 1, a diversity antenna 2, and an isolation branch structure 3 with a reference ground for optimizing the isolation between the main antenna 1 and the diversity antenna 2, wherein:

[0034] The main antenna 1 is located at one end of the antenna structure and is connected to the grounded aluminum foil through the first grounded copper foil 4;

[0035] The diversity antenna 2 is located at the other end of the antenna structure and is connected to the grounded aluminum foil through the second grounded copper foil 5;

[0036] The isolation branch structure 3 with reference ground is arranged between the main antenna 1 and the diversity antenna 2 of the antenna, connected to the grounding aluminum foil through the third grounding copper foil 6, and connected to the main antenna 1 or the diversity antenna 2.

[0037] In an optional embodiment, an isolation branch structure 3 with a reference ground is arranged between the main antenna 1 and the diversity antenna 2 of the combo antenna, and is connected to one of the antennas; the miniaturized antenna with a reference ground isolation branch structure described in the embodiment of the present application has an isolation branch structure introduced from the reference ground 8 side, which is equivalent to a reflector, which can reflect back part of the coupling generated by an excitation unit, thereby reducing the coupling between antennas; on the other hand, this reference ground isolation branch structure can extend the path of the coupling current and further weaken the coupling of the unit antenna.

[0038] In an optional embodiment, the miniaturized antenna with the reference ground isolation branch structure is in the form of a common PCB assembly, 90 mm long, 7.65 mm wide, and 0.4 mm thick. The PCB is made of FR-4 grade material with a dielectric constant of 4.3. Figure 2This is a parameter diagram of a small antenna with a reference ground isolation branch structure according to an embodiment of the present application. In order to clearly mark each parameter, Figure 2 The three grounding copper foils are omitted. The parameter values ​​of the miniaturized antenna with reference ground isolation branch structure in the embodiment of the present application are shown in Table 1. The units of the values ​​in Table 1 are all millimeters. Figure 1 and Figure 2 As shown, the miniaturized antenna with reference ground isolation branch structure is provided with a special-shaped notch 7 in the middle, and the isolation branch structure 3 with reference ground is arranged along the special-shaped notch 7 of the miniaturized antenna structure. The PCB is made of FR-4 grade material with a dielectric constant of 4.3.

[0039] L 90 L7 6 W 7.65 L8 11.2 L1 24.75 L9 6 L2 40 W1 0.8 L3 15.85 W2 2.8 L4 17.3 W3 3.6 L5 12 W4 5.9 L6 5.3

[0040] Table 1

[0041] Through the simulation and optimization of the reference ground isolation branch structure, the length of the isolation branch structure 3 with the reference ground is related to the frequency of the isolation to be improved. For example, the length of the isolation branch structure 3 with the reference ground is 1 / 4 of the wavelength corresponding to the frequency of the isolation to be improved. The embodiment of the present application takes the optimization frequency of 2.4 GHz as an example. When the optimization frequency is 2.4 GHz, 1 / 4 wavelength is about 31 mm. Therefore, the routing length of the reference ground isolation branch is about 31 mm, that is, the routing length of the longest path calculated from the reference ground 8 of the reference ground isolation direct structure is about 31 mm. Figure 3 This is a measurement diagram of a miniaturized antenna according to an optional embodiment of the present application. Figure 3 The length of the reference ground isolation branch structure is d1 + d2, which should be around 31 mm. Through actual measurement, d1 + d2 = 25.7 + 3.65 = 29.35 mm, which is within the acceptable error range.

[0042] The embodiments of this application use the optimized frequency of 2.4 GHz as an example. In practical applications, the above range is not limited. In practical applications, the parameters of the miniaturized antenna with reference ground isolation branch structure described in this utility model are also not limited to the ranges in Table 1. Based on the above relationship, those skilled in the art can optimize the isolation at different frequencies by configuring reference ground isolation branch structures of different sizes and forms.

[0043] The main antenna 1 and the diversity antenna 2 are both planar inverted-F antennas (PIFAs), and are connected to the same grounding aluminum foil 14 via a first grounding copper foil 4 and a second grounding copper foil 5 respectively.

[0044] The improvement effect of the reference ground isolated branch structure described in the embodiment of the present application is also related to its location, and will also be affected by the unit antenna and the antenna environment.

[0045] Figure 4 Graph showing the isolation of the miniaturized antenna with the reference ground isolation branch structure and the isolation of the common antenna according to the embodiment of the present application. Figure 4 As shown in FIG. 1 , when other parts of the antenna are identical, the isolation of the combo antenna with the reference ground isolation branch structure is significantly better than that of the ordinary combo antenna without the reference ground isolation branch structure.

[0046] The size of an existing common combo antenna is generally 90*10*0.4mm. The size of the small combo antenna provided in the embodiment of the present application is: 90*7.65*0.4mm, which further compresses the antenna's routing area.

[0047] Figure 5 This is an S-parameter curve diagram of a miniaturized antenna with a reference ground isolation branch structure according to an embodiment of the present application. Figure 6 This is an efficiency curve diagram of a miniaturized antenna with a reference ground isolation branch structure according to an embodiment of the present application. Figure 5 and Figure 6 The combo antenna can cover the 2.4GHz, 5G, and 6E frequency bands of Wi-Fi, and the antenna has good standing wave, antenna isolation (S21), and radiation efficiency.

[0048] In the context of the compressed antenna space of the entire device, the embodiment of the present application designs a miniaturized antenna with a reference ground isolation branch structure. The antenna adopts a combo form, and the radiation routing of the main antenna 1 and the diversity antenna 2 is carried out on the combo, and a reference ground isolation branch structure 3 is provided. In the case of a small size, good isolation between the main antenna 1 and the diversity antenna 2 is achieved. Compared with the traditional form of separation of the main antenna 1 and the diversity antenna 2, the antenna requires two grounding aluminum foils. The antenna of the embodiment of the present application adopts a cobmo antenna form, which saves one antenna grounding aluminum foil and reduces development costs.

[0049] Wireless Local Area Network (WLAN) technology is currently the most widely used communications technology. WLAN antennas are also expanding the spectrum application range for customers by adding the 5.925-7.125 GHz Wi-Fi 6E frequency band. Therefore, laptop WLAN antennas need to gradually cover the WiFi-6E wide frequency band. Therefore, the application of miniaturized antennas in laptops is urgent. With the design requirements of laptop terminals becoming increasingly miniaturized, the space available for WLAN antennas in the entire device is becoming smaller and smaller. At the same time, customers' requirements for noise shielding in laptop WLAN antenna solutions are also becoming increasingly stringent. The demand for competitive laptop product design is increasing the cost control of the entire device.

[0050] Most existing WLAN antennas in S3 / S5 consumer devices are located on hinged covers, presenting numerous challenges. For example, the antennas are located close to the laptop motherboard, exposing them to noise sources such as the Double Data Rate SDRAM (DDR), Central Processing Unit (CPU), Graphics Processing Unit (GPU), and Embedded DisplayPort (EDP), resulting in significant interference. Furthermore, with current laptop projects requiring the removal of aluminum foil shielding from the motherboard top surface, RF noise shielding remains unresolved. Furthermore, with industry-standard WLAN antenna design specifications updated, antenna efficiency for 2.4G, 5G, and WiFi-6E has been further improved. Existing WLAN antennas no longer meet these specifications for some frequency bands.

[0051] Based on this, an embodiment of the present application further discloses an electronic device, which includes the above-mentioned miniaturized antenna with a reference ground isolation branch structure. Figure 7 This is a schematic diagram of the electronic device structure of the embodiment of the present application. Figure 7 The middle part of the structure is covered by the battery and is temporarily invisible. Figure 8 This is a schematic diagram of the structure of the electronic device after the battery is removed according to an embodiment of the present application. Figure 7 and Figure 8 As shown, the electronic device includes: a miniaturized antenna 11 with a reference ground isolation branch structure, a battery 12, a mainboard 13, a grounding aluminum foil 14; a hinged cover 15, and a speaker 16;

[0052] In the electronic device described in the embodiment of the present application, the miniaturized antenna 11 with the reference ground isolation branch structure is located diagonally opposite the mainboard of the electronic device, on one side of the battery 12, so that the miniaturized antenna 11 has a better shielding effect on the entire device.

[0053] The metal sputtering layer 25 on the inner side of the electronic device housing is cleared in the area corresponding to the miniaturized antenna 11 .

[0054] Figure 9 This is a partial perspective view of an electronic device according to an embodiment of the present application. Figure 9 As shown, in the embodiment of the present application, a miniaturized PCB 22 is set at the base end of the plastic C shell 21. The material of PCB 22 is FR-4 with a dielectric constant of 4.3. The main antenna 1 and the diversity antenna 2 are integrated on the PCB 22 in the form of a combo combination of the same PCB. The main antenna 1 and the diversity antenna 2 are both PIFA antennas and share a grounding aluminum foil 14. In order to increase the adequacy of the grounding and the output of the first antenna feed cable 23 and the second antenna feed cable 24, the antenna uses three grounding copper foils to connect to the grounding aluminum foil 14, where the grounding aluminum foil 14 is the reference ground of the antenna, and a reference ground isolation branch structure 3 is provided in the middle to optimize the isolation between the main antenna and the diversity antenna. The embodiment of the present application flexibly sets a branch structure with a reference ground isolation to achieve good isolation performance between the main antenna 1 and the diversity antenna 2 in a compact environment. The metal sputtering layer 25 on the inner side of the electronic device D shell needs to be cleared in the area corresponding to the special-shaped antenna to ensure the performance of the antenna. In order to achieve a better noise shielding effect, an antenna with a reference ground isolation branch structure in the solution is arranged in a diagonal direction and on one side of the battery of an electronic device such as a notebook computer motherboard.

[0055] It should be understood that “one embodiment” or “an embodiment” mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present invention. Therefore, “in one embodiment” or “in an embodiment” appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in the various embodiments of the present invention, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. The above-mentioned serial numbers of the embodiments of the present application are for description only and do not represent the advantages and disadvantages of the embodiments.

[0056] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0057] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of the units is merely a logical functional division. In actual implementation, other division methods may be used, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not exist.

[0058] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0059] The above description is merely an embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A miniaturized antenna with a reference ground isolation branch structure, characterized in that: include: Main antenna, diversity antenna, isolation branch structure with reference ground for optimizing the isolation between the main antenna and the diversity antenna, wherein: The main antenna is located at one end of the antenna structure and is connected to the grounded aluminum foil through the first grounded copper foil; The diversity antenna is located at the other end of the antenna structure and is connected to the grounded aluminum foil via a second grounded copper foil; The isolation branch structure with reference ground is arranged between the main antenna and the diversity antenna of the antenna, is connected to the grounding aluminum foil through the third grounding copper foil, and is connected to the main antenna or the diversity antenna.

2. The miniaturized antenna with a reference ground isolation branch structure according to claim 1, characterized in that: The isolation branch structure with the reference ground is arranged along the special-shaped notch of the miniaturized antenna structure.

3. The miniaturized antenna with a reference ground isolation branch structure according to claim 2, characterized in that: The length of the isolation stub structure with the reference ground is related to the frequency at which the isolation is to be improved.

4. The miniaturized antenna with a reference ground isolation branch structure according to claim 3, characterized in that: The length of the isolation branch structure with the reference ground is 1 / 4 of the wavelength corresponding to the frequency for which the isolation is to be improved and optimized.

5. The miniaturized antenna with a reference ground isolation branch structure according to claim 1, characterized in that: The main antenna and the diversity antenna are both PIFA antennas, and are connected to the same grounding aluminum foil through a first grounding copper foil and a second grounding copper foil respectively.

6. The miniaturized antenna with a reference ground isolation branch structure according to claim 1, characterized in that: The miniaturized antenna with the reference ground isolation branch structure adopts a common PCB assembly form, and has a length of 90 mm, a width of 7.65 mm, and a thickness of 0.4 mm.

7. The miniaturized antenna with a reference ground isolation branch structure according to claim 6, characterized in that: The PCB is made of FR-4 grade material with a dielectric constant of 4.

3.

8. An electronic device, characterized in that: The electronic device comprises the miniaturized antenna with a reference ground isolation branch structure according to any one of claims 1 to 7.

9. The electronic device according to claim 8, characterized in that: The miniaturized antenna with the reference ground isolation branch structure is located at a diagonal direction of the electronic device mainboard, on one side of the battery.

10. The electronic device according to claim 9, characterized in that: The metal sputtering layer on the inner side of the electronic device housing is cleared in the area corresponding to the miniaturized antenna.

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