Mainboard structure provided with microstrip antenna and equipment

Abstract

The utility model provides a mainboard structure and equipment provided with a microstrip antenna, which comprises a mainboard, a microstrip antenna, a reflecting plate and a connecting piece, and is characterized in that the reflecting plate is arranged between the mainboard and the microstrip antenna; a plurality of through holes matched with pins of the microstrip antenna are formed in the reflecting plate, and the mainboard is connected with the pins; a plurality of groups of matched connecting parts are arranged on the main board and the reflecting board, and each group of connecting parts enables the main board and the reflecting board to be detachably connected through a connecting piece. According to the utility model, the single-sided printed circuit board is added to serve as the reflecting plate, the reflecting plate is not directly connected with the microstrip antenna, the holes are formed in the reflecting plate to accommodate the pins of the microstrip antenna, the pins penetrate through the reflecting plate to be connected with the mainboard, and the reflecting plate is detachably connected with the mainboard, so that the assembly is simple, the manufacturing cost is reduced, and the production efficiency is improved. And the limitation of the welding type directional microstrip antenna on the single-side wiring layout of the mainboard is solved.

Description

Technical Field

[0001] This utility model belongs to the field of radio frequency and antenna technology, specifically relating to a motherboard structure and device equipped with a microstrip antenna. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] In practical use, microstrip antennas are often mounted on the motherboard to receive and transmit wireless signals, ensuring normal network communication of the device. In specific applications, reflectors are often added to further improve the antenna gain and directivity.

[0004] There are two main ways to connect the existing microstrip antenna, reflector and motherboard. The first is to use a single-sided layout on the motherboard, with the side closest to the antenna used as the antenna reflector, and the microstrip antenna is set on the through-hole pad of the motherboard by soldering. The second is to connect and fix the antenna and reflector with screws, and the antenna feed point and grounding terminal are led out through a coaxial line and connected to the motherboard with a coaxial line.

[0005] The first method has the advantages of simple assembly and low cost. However, because one side of the motherboard is used as a reflector, this connection method is only suitable for single-sided motherboards. If used on a double-sided motherboard, the reflector will be incomplete, and the distance between it and the antenna will change abruptly, thus reducing antenna performance. In addition, if high-speed signal lines, clock lines, or switching power supplies are placed on the reflector, weak signals will be amplified by the antenna, leading to electromagnetic interference risks and affecting communication quality, thus limiting its applicability.

[0006] The second method has the advantage of not being limited by single-sided or double-sided wiring on the motherboard. However, coaxial cable connection requires open wire soldering on the antenna side, open wire soldering on the motherboard side, or connection through antenna connectors, which has the disadvantages of complex antenna manufacturing and high cost of antenna and motherboard. It is not suitable for cost-constrained products and has a narrow range of applications. Utility Model Content

[0007] To address the aforementioned problems, this invention proposes a motherboard structure and device incorporating a microstrip antenna. This invention adds a single-sided printed circuit board as a reflector, which is not directly connected to the microstrip antenna. Holes are made in the reflector to accommodate the microstrip antenna pins, which pass through the reflector and connect to the motherboard. The reflector and motherboard are detachably connected, simplifying assembly, reducing manufacturing costs, and overcoming the limitations imposed by soldered directional microstrip antennas on the single-sided wiring layout of the motherboard.

[0008] According to some embodiments, the present invention adopts the following technical solution:

[0009] A motherboard structure with a microstrip antenna includes a motherboard, a microstrip antenna, a reflector, and connectors, wherein:

[0010] The reflector is disposed between the main board and the microstrip antenna;

[0011] The reflector is provided with a number of through holes that are adapted to the pins of the microstrip antenna, and the motherboard is connected to the pins;

[0012] The motherboard and the reflector are provided with several sets of matching connection parts, and each set of connection parts allows the motherboard and the reflector to be detachably connected through a connector.

[0013] The above-described configuration of this utility model separates the microstrip antenna and the main board through a reflector, and the microstrip antenna and the reflector are not directly connected. The main board can be used to lay out lines or devices that pose a risk of electromagnetic interference. Holes are made in the reflector to accommodate the pins of the microstrip antenna. The pins pass through the reflector and connect to the main board, which solves the limitation of the soldered microstrip antenna on the single-sided wiring layout of the main board. In addition, the reflector and the main board can be detachably connected, making assembly simple and reducing manufacturing costs.

[0014] As an alternative implementation, the length, width, or diameter of the via has a certain redundancy compared to the length or width corresponding to the pin of the microstrip antenna.

[0015] This design ensures that when the microstrip antenna is connected to the motherboard, each edge of the via has a certain distance from the pins of the microstrip antenna, so that it does not touch the antenna pins, does not affect the communication quality, and is easy to assemble.

[0016] In a preferred embodiment, the through hole is rectangular.

[0017] The shapes of the rectangle and the pins match, making them easy to manufacture and reducing the area occupied by the vias.

[0018] As an alternative implementation, the connecting part is located next to the through hole or within the corresponding through hole setting range.

[0019] This design increases the tightness of the connection between the motherboard, reflector, and microstrip antenna.

[0020] As an alternative implementation, the reflector is a printed circuit board.

[0021] As an alternative implementation, the connecting part of the reflector is a nut, which is welded and fixed to the lower surface of the reflector.

[0022] This design reduces the need for drilling holes in the reflector and increases the tightness of the nut and reflector.

[0023] As a further defined implementation, the height of the nut is greater than or equal to the maximum height of the device mounted on the motherboard;

[0024] The length of the pin is greater than the sum of the maximum height of the device on the motherboard, the thickness of the reflector, and the thickness of the motherboard.

[0025] By adjusting the height of the nut and the length of the pin, the gap between the motherboard and the reflector can be adjusted, allowing devices of any height to be placed on the side of the motherboard that is close to the reflector.

[0026] As an alternative implementation, the connection part of the motherboard is a through hole, and the connector is a screw, which is used to detachably connect through the through hole and the corresponding nut.

[0027] As an alternative implementation, the motherboard is provided with a plurality of pads, the positions of which are adapted to the pin positions of the microstrip antenna, and the pins of the microstrip antenna are soldered to the motherboard.

[0028] As an alternative implementation, the pad is a via pad, and the via pad is located at the feed point of the microstrip antenna. This facilitates the fixing of the microstrip antenna and transmission line.

[0029] As an alternative implementation, the motherboard and the reflector are arranged in parallel and have a certain distance between them.

[0030] As an alternative implementation, the reflector and the microstrip antenna are arranged in parallel and have a certain distance between them.

[0031] The height between the reflector and the microstrip antenna is fixed to ensure consistency in the antenna's operating frequency band, gain, efficiency, radiation direction, and other performance characteristics. This height / spacing can be achieved through the pin length of the microstrip antenna.

[0032] A device comprising the aforementioned motherboard structure.

[0033] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0034] This invention provides a motherboard structure with a novel connection structure between the microstrip antenna, the reflector, and the motherboard. The reflector separates the microstrip antenna and the motherboard, and there is no direct connection between the reflector and the microstrip antenna and the reflector. The motherboard can accommodate lines or devices that pose an electromagnetic interference risk. Holes are made on the reflector to accommodate the pins of the microstrip antenna. The pins pass through the reflector and connect to the motherboard, solving the limitation of single-sided wiring layout on the motherboard imposed by soldered microstrip antennas. Furthermore, the reflector and the motherboard are detachably connected, simplifying assembly and significantly reducing the processing cost of the microstrip antenna and the motherboard.

[0035] The motherboard and microstrip antenna of this invention are isolated by a reflector, and the motherboard can be used to lay out lines or devices that pose a risk of electromagnetic interference, which has good practicality.

[0036] The reflector of this utility model has a connecting part near its through hole, and the motherboard has reserved through hole pads. The motherboard is connected to the reflector through the connector to ensure that the motherboard and the reflector are horizontally connected and to ensure the impedance continuity at the antenna interface of the motherboard.

[0037] This invention allows for adjustment of the gap between the motherboard and the reflector by adjusting the height of the nut and the length of the antenna pins. This enables devices of any height to be placed on the side of the motherboard that is close to the reflector, or adapts to any motherboard structure. Simply select the appropriate nut height and pin length according to the height of the device to be placed on the motherboard. No modification to the reflector or the motherboard itself is required, thus expanding the scope of application and reducing costs.

[0038] This invention ensures that the height between the reflector and the antenna is fixed by selecting the length of the antenna pins, thereby guaranteeing the consistency of the antenna's operating frequency band, gain, efficiency, radiation direction, and other performance characteristics, and improving communication performance.

[0039] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0040] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0041] Figure 1 This is a schematic diagram of a motherboard structure according to one embodiment;

[0042] Figure 2 This is a diagram illustrating the connection between a microstrip antenna and a motherboard in existing technology.

[0043] Figure 3 This is a model diagram of a motherboard structure according to one embodiment. Detailed Implementation

[0044] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0045] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0046] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0047] Where there is no conflict, the embodiments and features described in this application may be combined with each other.

[0048] Example 1

[0049] A motherboard structure with a microstrip antenna, such as Figure 1 As shown, it includes a mainboard C, a microstrip antenna A, a reflector B, and connectors, wherein:

[0050] The reflector B is disposed between the main board C and the microstrip antenna A;

[0051] The reflector plate B is provided with a plurality of through holes that are adapted to the pins of the microstrip antenna A, and the main board C is connected to the pins; in this embodiment, there are three through holes.

[0052] The motherboard C and the reflector B are provided with several sets of matching connection parts, and each set of connection parts allows the motherboard C and the reflector B to be detachably connected through a connector.

[0053] In this embodiment, the through hole is rectangular. A rectangular through hole is drilled at the antenna feed position to facilitate the pin of the microstrip antenna A to pass through. The length and width of the through hole have a certain redundancy size compared to the length or width corresponding to the pin of the microstrip antenna A, such as 2mm.

[0054] The rectangular shape matches the pin shape, facilitating manufacturing and reducing the area occupied by the via. When the microstrip antenna A is connected to the motherboard C, each edge of the via is at a certain distance from the pins of the microstrip antenna A, preventing contact with the antenna pins, ensuring no impact on communication quality, and facilitating assembly.

[0055] Of course, in other embodiments, the via can also be changed to other shapes, such as a circular via, and the via diameter has a certain redundancy size relative to the length or width corresponding to the pin of the microstrip antenna.

[0056] The aforementioned shape modification is readily conceived by those skilled in the art and falls within the protection scope of this utility model.

[0057] In this embodiment, the connecting part is located next to the through hole or within the corresponding through hole setting range. This placement of the connecting part near the opening helps ensure the tightness of the connection between the main board C, the reflector B, and the microstrip antenna A, avoiding the instability caused by the connecting parts being located at the edges and the gap between the pins and the through hole, which would otherwise result in unstable connections between the reflector B and the microstrip antenna A, or between the reflector B and the main board C.

[0058] In this embodiment, the reflector B is a printed circuit board, preferably a single-sided PCB board.

[0059] In this embodiment, the connecting part of the reflector B is a nut D, which is welded and fixed to the lower surface of the reflector B.

[0060] This design reduces the need for drilling holes in the reflector and increases the tightness of the nut and reflector.

[0061] Furthermore, the height of the nut D is greater than or equal to the maximum height of the device set on the motherboard C;

[0062] The length of the pin is greater than the sum of the maximum height of the device set on the motherboard C, the thickness of the reflector B, and the thickness of the motherboard C, so as to ensure that the pin can pass through the reflector B and the motherboard C and connect to the motherboard C.

[0063] By adjusting the height of nut D and the length of the pin, the gap between the motherboard C and the reflector B can be adjusted, allowing devices of any height to be placed on the side of the motherboard C that is close to the reflector B.

[0064] In this embodiment, the connecting part of the motherboard C is a through hole, and the connecting component is a screw E. The screw E is used to pass through the through hole and detachably connect with the corresponding nut D.

[0065] That is, the motherboard C has a hole at the position corresponding to the nut D of the reflector B, and the screw E is screwed into the nut D through the hole to fix the motherboard C and the reflector B.

[0066] In this embodiment, the motherboard C has a plurality of pads, the positions of which are adapted to the pin positions of the microstrip antenna A, and the pins of the microstrip antenna A are soldered to the motherboard C. The pads are via pads, and are located at the feed point of the microstrip antenna to facilitate fixing the microstrip antenna and transmission lines.

[0067] During assembly, first secure the reflector B and the mainboard C with nuts D and screws E. Then, pass the antenna A pin through the square opening on the reflector and insert it into the through-hole pad on the mainboard C, connecting the antenna pin A and the mainboard C with solder.

[0068] During disassembly, first separate antenna A from motherboard C, then remove screw E to separate reflector B from motherboard C.

[0069] The reflector has a connection near its through-hole, which helps to ensure impedance continuity at the motherboard antenna interface.

[0070] In a preferred embodiment, the reflector and the main board are arranged in parallel. The reflector and the microstrip antenna are also arranged in parallel and have a certain distance between them. That is, the height between the reflector and the microstrip antenna is fixed, thereby ensuring the consistency of the antenna's operating frequency band, gain, efficiency, radiation direction, and other performance characteristics. This height / distance can be achieved by adjusting the pin length of the microstrip antenna.

[0071] The specific height value can be determined through actual simulation based on factors such as antenna size, reflector size, and operating frequency band.

[0072] Of course, in some embodiments, the reflector and the main board, or / and the reflector and the microstrip antenna are not necessarily arranged in parallel, but may have a certain tilt angle, which can also achieve the purpose of this embodiment.

[0073] To illustrate the effectiveness of the structure provided in this embodiment, a simulation comparison experiment was conducted, utilizing methods such as... Figure 2 The diagram shows a simple connection structure between the microstrip antenna and the motherboard (hereinafter referred to as the existing structure), and as shown below. Figure 3 The connection structure of the motherboard structure provided in this embodiment is compared with that shown.

[0074] Through simulation comparison, the maximum gain of the antenna with the existing structure is 9.1639 dBi, while the maximum gain of the antenna with the structure in this embodiment is 8.9067 dBi.

[0075] Return loss:

[0076] The existing antenna structure has a return loss of 8.64 / 11.00 / 10.89 dB at 2.4 GHz / 2.45 GHz / 2.5 GHz.

[0077] The antenna structure in this embodiment has a return loss of 12.52 / 13.81 / 9.89 dB at 2.4 GHz / 2.45 GHz / 2.5 GHz.

[0078] Based on the above data, it can be concluded that the structure of this embodiment is not significantly different from the traditional structure in terms of antenna performance and antenna feed line impedance characteristics.

[0079] Example 2

[0080] A device, such as a communication device or a radar device, includes the motherboard structure provided in Embodiment 1.

[0081] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made by those skilled in the art without creative effort within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A motherboard structure equipped with a microstrip antenna, characterized in that, Includes a motherboard, microstrip antenna, reflector, and connectors, among which: The reflector is disposed between the main board and the microstrip antenna; The reflector is provided with a number of through holes that are adapted to the pins of the microstrip antenna, and the motherboard is connected to the pins; The motherboard and the reflector are provided with several sets of matching connection parts, and each set of connection parts allows the motherboard and the reflector to be detachably connected through a connector.

2. The motherboard structure with a microstrip antenna as described in claim 1, characterized in that, The length, width, or diameter of the via has a certain redundancy compared to the length or width corresponding to the pin of the microstrip antenna.

3. The motherboard structure with a microstrip antenna as described in claim 1, characterized in that, Each set of connecting parts is located next to the corresponding through hole or within the set range of the corresponding through hole.

4. The motherboard structure with a microstrip antenna as described in claim 1, characterized in that, The reflector is a printed circuit board; Alternatively, the connecting part of the reflector is a nut, which is welded and fixed to the lower surface of the reflector.

5. The motherboard structure with a microstrip antenna as described in claim 4, characterized in that, The height of the nut is greater than or equal to the maximum height of the components set on the motherboard; The length of the pin is greater than the sum of the maximum height of the device on the motherboard, the thickness of the reflector, and the thickness of the motherboard.

6. The motherboard structure with a microstrip antenna as described in claim 1, characterized in that, The motherboard has a through hole for connection, and the connector is a screw. The screw is used to pass through the through hole and the corresponding nut for detachable connection.

7. The motherboard structure with a microstrip antenna as described in claim 1, characterized in that, The motherboard has several pads, the positions of which are adapted to the pin positions of the microstrip antenna, and the pins of the microstrip antenna are soldered to the motherboard.

8. A motherboard structure with a microstrip antenna as described in claim 7, characterized in that, The pad is a via pad, and the via pad is located at the feed point of the microstrip antenna.

9. A motherboard structure with a microstrip antenna as described in claim 1, characterized in that, The motherboard and the reflector are arranged in parallel and have a certain distance between them; Or / and, the reflector and the microstrip antenna are arranged in parallel and have a certain distance between them.

10. A device, characterized in that, The motherboard structure includes any one of claims 1-9.

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