High-isolation and high-performance wifi and Bluetooth common radiator small-space antenna
By setting up an isolation structure in a small space, using the isolation plate and the slidingly connected isolation copper sheet to form a physical barrier, the problem of electromagnetic coupling between antennas is solved, and an antenna design with high isolation and high performance is achieved.
Patent Information
- Application Number
- CN202510930276.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-07
- Publication Date
- 2025-08-22
AI Technical Summary
In small space environments, traditional antenna design methods rely on separation in physical space to reduce electromagnetic coupling of antennas in the same frequency, resulting in poor isolation performance between antennas and difficult to meet the design requirements of high isolation and high performance.
The isolation structure is adopted, including the isolation plate, fixing plate, locking screws, access plate and slidingly connected isolation copper sheets, forming a physical barrier, reducing the electromagnetic coupling between the WIFI2.4G antenna and other antennas, and forming a physical barrier through the isolation plate and the slidingly connected isolation copper sheets to enhance isolation.
A high isolation design is realized in a small space, which significantly improves the isolation performance between antennas, breaks through space limitations, and improves the self-desolution isolation effect of antennas.
Smart Images
Figure CN120527640A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of Bluetooth, and in particular to a high-isolation, high-performance, Wi-Fi and Bluetooth co-radiator small-space antenna. Background Art
[0002] With the rapid development of wireless communication technology, various terminal products such as vehicle-mounted antenna systems, smart glasses, smartphones, and other wearable devices are increasingly demanding antenna performance. Especially in confined environments, achieving high isolation and high performance for co-frequency antennas has become a key issue that needs to be addressed in the field of antenna technology.
[0003] In existing antenna design techniques, the traditional approach to designing two co-frequency antennas in a small space often relies on physical separation. That is, by moving the two co-frequency antennas as far apart as possible to reduce electromagnetic coupling and mutual influence between them. However, this approach has significant limitations. In many application scenarios, such as smart glasses and small wearable devices, antenna installation space is extremely limited, and it is impossible to meet the requirement of moving the two co-frequency antennas far enough apart to achieve good isolation. As a result, the isolation performance between the antennas is still poor, making it difficult to meet the requirements of high-isolation and high-performance antenna design. Therefore, we propose a high-isolation and high-performance co-radiator small-space antenna for Wi-Fi and Bluetooth. Summary of the Invention
[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a high-isolation and high-performance Wi-Fi and Bluetooth co-radiator small space antenna, which can solve the problem that in the existing antenna design technology, for the design of two antennas with the same frequency in a small space, the traditional design ideas often rely on physical space separation, that is, by pulling the two antennas with the same frequency as far as possible to reduce the electromagnetic coupling and mutual influence between them. However, this method has significant limitations. In many application scenarios, such as smart glasses, small wearable devices, etc., the antenna installation space is extremely limited, and it is impossible to meet the need to pull the two antennas with the same frequency to a sufficient distance to achieve good isolation. As a result, the isolation performance between the antennas is still poor, and it is difficult to meet the requirements of high-isolation and high-performance antenna design requirements.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-isolation, high-performance, Wi-Fi and Bluetooth co-radiator small-space antenna, comprising:
[0006] The housing, PCB board, WIFI2.4G antenna, Bluetooth antenna and WIFI5G antenna. The PCB board is fixedly installed inside the housing. The WIFI2.4G antenna and Bluetooth antenna are both fixedly installed on one side of the PCB board. The WIFI5G antenna is fixed on the side of the PCB board away from the WIFI2.4G antenna.
[0007] Isolation structure: The isolation structure is located on the PCB board;
[0008] The isolation structure includes an isolation plate, four fixing plates, four locking screws and an inspection plate. The four fixing plates are fixedly connected to both sides of the isolation plate. Threaded holes are provided on the tops of the four fixing plates. The four locking screws are connected to the internal threads of the corresponding threaded holes. The isolation plate is fixedly installed on the side of the PCB board close to the WIFI2.4G antenna by four locking screws. The inspection plate is fixedly installed on one side of the isolation plate with bolts. Multiple installation slots and multiple positioning slots are provided on the side of the isolation plate close to the inspection plate. Multiple positioning slots are connected to the interior of the corresponding installation slots.
[0009] Preferably, the isolation structure also includes multiple isolation copper plates, each of which is slidably connected to the inside of the corresponding installation slots, and the tops and bottoms of the multiple isolation copper plates are fixedly connected with positioning sliders, and the multiple positioning sliders are slidably connected to the inside of the corresponding positioning slots.
[0010] Preferably, there are two isolation structures, which are symmetrically arranged on both sides of the WIFI 2.4G antenna.
[0011] Preferably, a disassembly groove is provided on a side of the isolation plate close to the inspection plate.
[0012] Preferably, feed three, feed two and feed one are respectively installed on the PCB board.
[0013] Preferably, the isolation plate and the inspection plate are both made of plastic.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] 1. This high-isolation, high-performance, WiFi and Bluetooth co-radiator small space antenna uses an isolation structure, an isolation plate, and a sliding isolation copper sheet to form a physical barrier, effectively reducing the electromagnetic coupling between the WiFi 2.4G antenna and other antennas, thereby achieving a high isolation design in a small space, breaking through space limitations, and significantly improving the isolation performance between antennas.
[0016] 2. This high-isolation, high-performance, WiFi and Bluetooth co-radiator small space antenna can produce a high-efficiency antenna in differential mode when the size and feeding distance of the two antennas are appropriate. When the common mode and differential mode of the antenna work together, they cancel each other out, which can improve the self-isolation of the two antennas. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;
[0019] Figure 2 This is a schematic diagram of the WIFI 2.4G antenna structure of the present invention;
[0020] Figure 3 This is a schematic diagram of the WIFI5G antenna structure of the present invention;
[0021] Figure 4 It is a schematic diagram of the fixed plate structure of the present invention;
[0022] Figure 5 This is a schematic diagram of the disassembly slot structure of the present invention;
[0023] Figure 6 Schematic diagram of the isolation plate structure of the present invention;
[0024] Figure 7 This is a schematic diagram of the isolation copper sheet structure of the present invention.
[0025] Figure numerals: 1. Shell; 2. WIFI 2.4G antenna; 3. Bluetooth antenna; 4. WIFI 5G antenna; 5. Feed three; 6. Feed two; 7. Feed one; 8. Isolation plate; 9. PCB board; 10. Locking screw; 11. Fixing plate; 12. Threaded hole; 13. Inspection plate; 14. Disassembly slot; 15. Isolation copper sheet; 16. Installation slot; 17. Positioning slot; 18. Positioning slider. DETAILED DESCRIPTION
[0026] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be understood as a limitation on the scope of protection of the present invention.
[0027] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.
[0028] In the description of this invention, terms such as "greater than," "less than," and "exceed" are understood to exclude the number itself, while terms such as "above," "below," and "within" are understood to include the number itself. The use of terms such as "first" and "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.
[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.
[0030] See also Figure 1-7 The present invention provides a technical solution: a high-isolation, high-performance, Wi-Fi and Bluetooth co-radiator small space antenna, comprising:
[0031] Housing 1, PCB board 9, WIFI2.4G antenna 2, Bluetooth antenna 3 and WIFI5G antenna 4, PCB board 9 is fixedly installed inside housing 1, WIFI2.4G antenna 2 and Bluetooth antenna 3 are both fixedly installed on one side of PCB board 9, and WIFI5G antenna 4 is fixed on the side of PCB board 9 away from WIFI2.4G antenna 2;
[0032] Isolation structure, the isolation structure is located on the PCB board 9;
[0033] The isolation structure includes an isolation plate 8, four fixed plates 11, four locking screws 10 and an inspection plate 13. The four fixed plates 11 are fixedly connected to both sides of the isolation plate 8 respectively. The tops of the four fixed plates 11 are provided with threaded holes 12. The four locking screws 10 are connected to the internal threads of the corresponding threaded holes 12. The isolation plate 8 is fixedly installed on the side of the PCB board 9 close to the WIFI2.4G antenna 2 by four locking screws 10. The inspection plate 13 is fixedly installed on one side of the isolation plate 8 by bolts. The side of the isolation plate 8 close to the inspection plate 13 is provided with multiple installation slots 16 and multiple positioning slots 17. The multiple positioning slots 17 are connected to the inside of the corresponding installation slots 16. The isolation plate 8 and the inspection plate 13 are both made of plastic.
[0034] The isolation structure also includes multiple isolation copper sheets 15, which are all slidably connected to the inside of the corresponding installation slots 16. The tops and bottoms of the multiple isolation copper sheets 15 are fixedly connected with positioning sliders 18, and the multiple positioning sliders 18 are all slidably connected to the inside of the corresponding positioning grooves 17.
[0035] There are two isolation structures, which are symmetrically arranged on both sides of the WIFI2.4G antenna 2. A disassembly slot 14 is provided on the side of the isolation plate 8 close to the access plate 13, and feed three 5, feed two 6 and feed one 7 are respectively installed on the PCB board 9.
[0036] Furthermore, when using the device, the PCB board 9 is fixedly installed inside the shell 1 as the support and electrical connection basis of the antenna system. The isolation structure consists of an isolation plate 8, a fixing plate 11, a locking screw 10 and an inspection plate 13. The isolation plate 8 is fixed to the side of the PCB board 9 close to the WIFI2.4G antenna 2 by the locking screw 10 to form a physical barrier. The installation slot 16 and the positioning slot 17 opened on the isolation plate 8 are used to slide and connect the isolation copper sheet 15. These copper sheets slide in the positioning slot 17 through the positioning slider 18 to ensure the precise installation and stable fixation of the copper sheet.
[0037] The addition of the isolation copper sheet 15 further enhances the isolation effect. Its conductive properties reduce the electromagnetic coupling between the WIFI2.4G antenna 2 and other antennas, thereby improving the isolation between the antennas. Feed three 5, feed two 6 and feed one 7 are installed on the PCB board 9. These feed points are responsible for transmitting the radio frequency signal to the corresponding antenna to realize the wireless communication function. The inspection plate 13 is fixed to one side of the isolation plate 8 by bolts, which is convenient for inspection and maintenance of the interior of the isolation structure. The setting of the disassembly slot 14 makes it easy to disassemble the isolation copper sheet 15 when necessary.
[0038] Wi-Fi 2.4G2 and Bluetooth antenna 3 share a common radiator. The two antennas have two antenna modes: common-mode (CM) and differential-mode (DM). The antennas primarily operate at 1 / 4 wavelength, resulting in high efficiency. When common-mode (CM) and differential-mode (DM) currents act together, they cancel each other out, self-isolating the two antennas. The current pattern fed by one port is equivalent to the synthesis of the CM and DM currents. Therefore, half of the current in the shared radiator is superimposed, while the other half is canceled out.
[0039] By setting up an isolation structure, a physical barrier is formed by using the isolation plate 8 and the slidingly connected isolation copper sheet 15, which effectively reduces the electromagnetic coupling between the WIFI2.4G antenna 2 and other antennas, thereby achieving a high isolation design in a small space, breaking through space limitations, and significantly improving the isolation performance between antennas.
[0040] When the sizes and feeding distances of the two antennas are appropriate, the antennas can produce high-efficiency antennas in differential mode. When the common mode and differential mode of the antennas work together, they cancel each other out, which can improve the self-isolation of the two antennas.
[0041] Structural Description: Housing 1: It constitutes the external protective structure of the antenna device, used to accommodate and protect the internal PCB board 9 and each antenna, and provide physical support and protection for the entire antenna system;
[0042] PCB board 9: fixedly installed inside the housing 1, serving as the support carrier and electrical connection basis of the antenna system, used to install and fix the WiFi 2.4G antenna 2, Bluetooth antenna 3, WiFi 5G antenna 4, as well as feed three 5, feed two 6, feed one 7 and other components, and realize the electrical connection between the components;
[0043] WIFI2.4G antenna 2: fixedly installed on one side of PCB board 9, used to receive and transmit 2.4GHz frequency band WIFI signals to realize wireless communication function;
[0044] Bluetooth antenna 3: Fixedly installed on one side of PCB board 9, sharing an antenna radiator with Wi-Fi 2.4G antenna 2, used to receive and transmit Bluetooth signals to achieve Bluetooth wireless communication;
[0045] WIFI5G antenna 4: fixed on the side of PCB board 9 away from WIFI2.4G antenna 2, used to receive and transmit 5GHz band WIFI signals and expand the wireless communication frequency band;
[0046] Isolation plate 8: Located on PCB 9, it is fixed to the side of PCB 9 near the Wi-Fi 2.4G antenna 2 via four fixing plates 11 and four locking screws 10, forming a physical barrier. Together with the isolation copper sheet 15, it reduces electromagnetic coupling between antennas and improves isolation.
[0047] There are four fixing plates 11, which are fixedly connected to both sides of the isolation plate 8. The top of the fixing plates 11 has threaded holes 12 for engaging with the locking screws 10 to fix the isolation plate 8 to the PCB 9.
[0048] There are four locking screws 10, which are threadedly connected to the corresponding threaded holes 12 to fix the isolation plate 8 on the PCB board 9;
[0049] Inspection plate 13: fixed to one side of the isolation plate 8 by bolts, facilitating inspection and maintenance of components such as the isolation copper sheet 15 inside the isolation structure;
[0050] Mounting slot 16: opened on the side of the isolation plate 8 close to the access plate 13, used for sliding connection of the isolation copper sheet 15, providing a mounting position for the isolation copper sheet 15;
[0051] Positioning slots 17: There are multiple positioning slots 17, which are connected to the interior of the corresponding mounting slots 16 and are used to cooperate with the positioning sliders 18 on the isolation copper sheet 15 to ensure the accurate installation and stable fixation of the isolation copper sheet 15;
[0052] Isolation copper sheets 15: There are multiple isolation copper sheets 15, which are slidably connected to the corresponding installation slots 16. Their conductive properties reduce the electromagnetic coupling between the WiFi 2.4G antenna 2 and other antennas, thereby enhancing the isolation effect.
[0053] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the scope of the present invention.
Claims
1. A high-isolation, high-performance, Wi-Fi and Bluetooth co-radiator small space antenna, characterized by: include: A housing (1), a PCB board (9), a WIFI 2.4G antenna (2), a Bluetooth antenna (3) and a WIFI 5G antenna (4); the PCB board (9) is fixedly mounted inside the housing (1); the WIFI 2.4G antenna (2) and the Bluetooth antenna (3) are both fixedly mounted on one side of the PCB board (9); and the WIFI 5G antenna (4) is fixed on a side of the PCB board (9) away from the WIFI 2.4G antenna (2); An isolation structure, the isolation structure being located on the PCB board (9); The isolation structure comprises an isolation plate (8), four fixing plates (11), four locking screws (10) and an inspection plate (13). The four fixing plates (11) are respectively fixedly connected to both sides of the isolation plate (8). The tops of the four fixing plates (11) are each provided with a threaded hole (12). The four locking screws (10) are each connected to the internal threads of the corresponding threaded holes (12). The isolation plate (8) is fixedly mounted on a side of the PCB board (9) close to the WIFI2.4G antenna (2) by four locking screws (10), and the inspection plate (13) is fixedly mounted on a side of the isolation plate (8) by bolts. A plurality of mounting slots (16) and a plurality of positioning slots (17) are provided on a side of the isolation plate (8) close to the inspection plate (13), and the plurality of positioning slots (17) are all connected to the interior of the corresponding mounting slots (16).
2. The high-isolation, high-performance, Wi-Fi and Bluetooth co-radiator small space antenna according to claim 1, characterized in that: The isolation structure further comprises a plurality of isolation copper sheets (15), each of which is slidably connected to the inside of a corresponding installation slot (16); The tops and bottoms of the plurality of isolation copper sheets (15) are fixedly connected with positioning sliders (18), and the plurality of positioning sliders (18) are slidably connected to the inside of the corresponding positioning grooves (17).
3. The high-isolation, high-performance, Wi-Fi and Bluetooth co-radiator small space antenna according to claim 1, characterized in that: There are two isolation structures, which are symmetrically arranged on both sides of the WIFI 2.4G antenna (2).
4. The high-isolation, high-performance, Wi-Fi and Bluetooth co-radiator small space antenna according to claim 1, characterized in that: A disassembly groove (14) is provided on one side of the isolation plate (8) close to the inspection plate (13).
5. The high-isolation, high-performance, Wi-Fi and Bluetooth co-radiator small space antenna according to claim 1, characterized in that: The PCB board (9) is respectively equipped with a third feeder (5), a second feeder (6) and a first feeder (7).
6. The high-isolation, high-performance, Wi-Fi and Bluetooth co-radiator small space antenna according to claim 1, characterized in that: The isolation plate (8) and the inspection plate (13) are both made of plastic.