GNSS antenna

Abstract

The utility model relates to the technical field of antenna equipment, and discloses a GNSS (Global Navigation Satellite System) antenna, which comprises a circuit board; the mounting bracket comprises a first supporting part, a mounting part and a limiting part, the mounting part is connected with the circuit board, and the limiting part is arranged between the first supporting part and the circuit board; the radiation unit is arranged on the supporting part, and one end of the radiation unit penetrates through the limiting part and then is connected to the circuit board; and the feed unit is arranged in the limiting part and is abutted against or coupled with the radiation unit, and one end of the feed unit is connected to the circuit board. According to the GNSS antenna, the mounting bracket is arranged between the circuit board and the radiation unit, and the radiation unit is arranged on the mounting bracket, so that the radiation unit can be prevented from falling off due to vibration in the use process, and the stability of the GNSS antenna structure is improved.

Description

Technical Field

[0001] This utility model relates to the field of antenna equipment technology, specifically to a GNSS antenna. Background Technology

[0002] GNSS (Global Navigation Satellite System) antennas, as receiving antennas in global satellite navigation systems, can be used for high-precision positioning and play a particularly important role in new energy vehicles, intelligent vehicles, and autonomous driving. A GNSS antenna mainly consists of a ceramic antenna (also known as a dielectric antenna) and a connected low-noise amplifier. The ceramic antenna receives satellite signals, and the low-noise amplifier amplifies the signal, compensating for signal attenuation during transmission and improving the signal-to-noise ratio. The performance of this type of antenna mainly depends on the ceramic antenna. Currently, there are multiple satellite navigation system suppliers, such as the BeiDou Navigation Satellite System (BDS) and the Global Positioning System (GPS), each operating in different frequency bands. For a GNSS antenna to be compatible with these navigation systems, it needs to have a wide operating frequency band, meaning it can receive satellite signals across a broad range of frequencies.

[0003] Ceramic antennas are relatively expensive to manufacture and have limited bandwidth due to their material properties. Improving this aspect to extend the bandwidth would be costly and significantly increase the antenna's size, failing to meet the miniaturization and weight reduction requirements of automotive components. Using traditional metal elements as the antenna body, however, can easily lead to detachment from the mainboard due to vibrations during vehicle operation. Utility Model Content

[0004] This utility model was made to solve the above-mentioned technical problems, and one of its objectives is to provide a GNSS antenna that is low in cost, small in size, and structurally stable.

[0005] Another objective of this invention is to provide a GNSS antenna with a relatively wide operating frequency band.

[0006] According to one embodiment of the present invention, a GNSS antenna is provided, comprising: a circuit board; a mounting bracket including a first support portion, a mounting portion and a limiting portion, wherein the mounting portion is connected to the circuit board and the limiting portion is disposed between the first support portion and the circuit board; a radiating element disposed on the support portion, one end of which passes through the limiting portion and is connected to the circuit board; and a feeding unit disposed in the limiting portion, which abuts against or is coupled to the radiating element, one end of which is connected to the circuit board.

[0007] In one embodiment, the limiting portion has a first limiting strip hole and a second limiting strip hole, one end of the radiating unit passes through the first limiting strip hole, and the feeding unit passes through the second limiting strip hole.

[0008] In one embodiment, the first limiting strip hole and the second limiting strip hole are arranged side by side; the portion of the radiating unit located in the first limiting strip hole is a first coupling portion; the portion of the feeding unit located in the second limiting strip hole is a second coupling portion, and the second coupling portion is coupled to the first coupling portion.

[0009] In one embodiment, the radiating unit includes four radiators arranged sequentially along the circumference of the feeding unit, the main body of the radiators being attached to the first support portion; the feeding unit includes two intersecting, U-shaped feeding bodies, the two ends of the feeding bodies forming the second coupling portion, and one end of the feeding body being connected to the circuit board.

[0010] In one embodiment, the main body of the radiator has a fan-shaped structure with T-shaped and / or strip-shaped slots formed thereon; the length of the slots is 1 / 10λ-1 / 4λ, where λ is the wavelength corresponding to the center frequency of the GNSS antenna.

[0011] In one embodiment, the mounting bracket includes four of the limiting portions.

[0012] In one embodiment, the mounting bracket further includes a second support extending along the outer periphery of the first support towards one side of the circuit board; the GNSS antenna further includes a parasitic unit attached to the first and second supports and opposite to the radiating unit, one end of the parasitic unit being connected to the circuit board.

[0013] As one implementation, the coupling gap between the parasitic unit and the radiating unit is 1 / 20λ-1 / 10λ, where λ is the wavelength corresponding to the center frequency of the GNSS antenna.

[0014] In one embodiment, a limiting groove is formed on the second support portion; one end of the parasitic unit is formed with a connecting portion that is engaged in the limiting groove.

[0015] In one embodiment, the first support part, the second support part, the mounting part, and the limiting part are an integral structure.

[0016] As described above and through practical application, the GNSS antenna of this invention, by setting a mounting bracket between the circuit board and the radiating element, and placing the radiating element on the mounting bracket, can prevent the radiating element from falling off due to vibration during use, thus improving the stability of the GNSS antenna structure. Compared to traditional ceramic antennas, this GNSS antenna, by setting a separate radiating element, can maintain lower cost and size while extending bandwidth. Attached Figure Description

[0017] Figure 1 and Figure 2 This is a schematic diagram of the GNSS antenna in one embodiment of the present invention from two different perspectives.

[0018] Figure 3 This is a cross-sectional structural diagram of a GNSS antenna involved in one embodiment of the present invention.

[0019] Figure 4 and Figure 5 This is an exploded view of the GNSS antenna in one embodiment of the present invention from two different perspectives. Detailed Implementation

[0020] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0021] Furthermore, the accompanying drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. It should be noted that in this disclosure, the terms "comprising," "configured with," and "set in" are used to indicate an open-ended inclusion, meaning that additional elements / components / etc. may exist besides those listed; the terms "first," "second," etc., are used only as labels and are not intended to limit the number or order of objects; the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] According to one embodiment of this utility model, a GNSS antenna is provided. Please refer to [reference needed]. Figures 1 to 5 The GNSS antenna includes a circuit board 1, a mounting bracket 2, a radiating element 3, and a feeding unit 4. The radiating element 3 and the feeding unit 4 are connected to the circuit board 1 via the mounting bracket 2. This connection not only powers the radiating element 3 but also prevents it from detaching due to vibration during use, thus improving the stability of the GNSS antenna structure.

[0024] Specifically, the mounting bracket 2 includes a first support portion 21, a mounting portion 23, and a limiting portion 24. The mounting portion 23 is connected to the circuit board 1, for example, by bolts, resulting in a relatively stable structure during use. The limiting portion 24 is located between the first support portion 21 and the circuit board 1 to further limit the position of the power supply unit 4 and the radiation unit 3, thereby improving the structural stability of the power supply unit 4 and the radiation unit 3 during use.

[0025] like Figures 1 to 3 As shown, the main body of the radiating element 3 is disposed on the first support portion 21, and one end of it passes through the limiting portion 24 and is connected to the circuit board 1. The main body of the radiating element 3 is attached to the surface of the first support portion 21, making it less prone to longitudinal movement during use. In one embodiment, the main body of the radiating element 3 can also be glued to the first support portion 21 to further improve the stability of the connection. One end of the radiating element 3 passes through the limiting portion 24 and is then connected to the circuit board 1. The limiting portion 24 can provide lateral limitation for the radiating element 3, further improving the structural stability of the radiating element 3. The radiating element 3 can be made of metal, which, compared to traditional ceramic antennas, can extend bandwidth while maintaining lower cost, size, and weight.

[0026] The power supply unit 4 is disposed in the limiting part 24 and coupled to the radiation unit 3. One end of the unit is connected to the circuit board 1, enabling it to couple power to the radiation unit 3. In other embodiments, the power supply unit 4 can also be directly connected to the radiation unit 3 within the limiting part 24 for power supply.

[0027] This GNSS antenna utilizes a mounting bracket 2 positioned between the circuit board 1 and the radiating element 3. The radiating element 3 is mounted on the mounting bracket 2, and the first support portion 21 and the limiting portion 24 of the mounting bracket 2 prevent the radiating element 3 from detaching due to vibration during use, thus improving the stability of the GNSS antenna structure. Compared to traditional ceramic antennas, this GNSS antenna, by using a separate radiating element 3, can extend bandwidth while maintaining lower cost, size, and weight, meeting the current automotive requirements for miniaturized and lightweight components.

[0028] Furthermore, such as Figure 5 As shown, in this embodiment, the mounting part 23 is a columnar structure with screw holes inside, which can be connected to the circuit board 1 by bolts to fix the mounting bracket 2. The first support part 21 is a plate-shaped structure opposite to the circuit board 1 and is fixed to the mounting part 23. A support surface for supporting the main body of the radiation unit 3 is formed on the first support part 21. The limiting part 24 is fixedly provided on one side of the first support part 21 near the circuit board 1, and a first limiting strip hole 241 and a second limiting strip hole 242 are formed thereon. One end of the radiation unit 3 passes through the first limiting strip hole 241, and the power supply unit 4 passes through the second limiting strip hole 242. By providing these two types of limiting strip holes, the power supply unit 4 and the radiation unit 3 can be firmly mounted on the mounting bracket 2.

[0029] To improve the coupling effect between the power supply unit 4 and the radiation unit 3, in this embodiment, the first limiting strip hole 241 and the second limiting strip hole 242 are arranged side by side. Please refer to... Figure 4 and Figure 5 The radiating unit 3 includes four radiators 31 arranged sequentially along the circumference of the feeding unit 4. The main body of each radiator 31 is attached to the first support 21. One end of each radiator 31 is bent toward the circuit board 1 to form a first coupling portion 32 located in the first limiting hole 241. That is, the portion of the radiating unit 3 located in the first limiting hole 241 is the first coupling portion 32. The portion of the feeding unit 4 located in the second limiting hole 242 is the second coupling portion 42, and the second coupling portion 42 is coupled to the first coupling portion 32. By providing these two parallel limiting holes on the limiting portion 24, the coupling effect between the feeding unit 4 and the radiating unit 3 can be improved while fixing the feeding unit 4 and the radiating unit 3. In practical applications, the coupling degree of the first coupling portion 32 and the second coupling portion 42 can also be adjusted by adjusting the distance between the parallel first limiting hole 241 and the second limiting hole 242.

[0030] In other embodiments, when the power supply unit 4 and the radiation unit 3 are directly connected, the first limiting strip hole 241 and the second limiting strip hole 242 can be connected to achieve direct connection between the power supply unit 4 and the radiation unit 3.

[0031] To ensure stable and reliable power supply to all four radiators 31 arranged sequentially around the circumference of the feeding unit 4, in this embodiment, the feeding unit 4 includes two intersecting, U-shaped feeding elements 41. The two ends of each feeding element 41 have the second coupling portion 42, and one end of each feeding element 41 is connected to the circuit board 1. In this configuration, one end of each feeding element 41 receives the electrical signal from the circuit board 1 and then transmits it to the two opposing radiators 31 via coupling, thus achieving external signal transmission. When the antenna receives a signal, the signal transmission path is reversed. In practical applications, a quarter-wavelength impedance transformation can be achieved by adjusting the length and / or width of the second coupling portion 42, making the antenna operate more stably in its operating frequency band.

[0032] Corresponding to the structure of the power supply unit 4 and the radiation unit 3, four limiting portions 24 are provided on the mounting bracket 2, each of which has the aforementioned first limiting hole and second limiting hole. Furthermore, to save on manufacturing materials, based on the characteristic that the power supply body 41 is only connected to the circuit board 1 at one end, on two opposing limiting portions 24, only one limiting portion 24 has a second limiting hole that penetrates the body of the limiting portion 24, while the other limiting portion 24 only has a second limiting hole of the same length as the second coupling portion 42 at that location. Specifically, as shown... Figure 5 As shown, the length of the second limiting hole on the two adjacent limiting parts 24 is smaller than that on the other two limiting parts 24, which can save the manufacturing material of the limiting parts 24.

[0033] Furthermore, to expand bandwidth and reduce size, in this embodiment, the GNSS antenna is circular overall, with the first support 21 and the circuit board 1 being two opposing circular plates. Correspondingly, the main bodies of the four radiators 31 are fan-shaped, combined to form a circular radiating unit 3, which can maximally cover the surface of the first support 21, thus expanding bandwidth without significantly increasing size. T-shaped and / or strip-shaped slots are formed on each radiator 31, with a slot length of 1 / 10λ-1 / 4λ, where λ is the wavelength corresponding to the center frequency of the GNSS antenna. By setting these slots and utilizing the slots formed between adjacent radiators 31, the bandwidth can be adjusted to achieve the desired bandwidth.

[0034] Furthermore, in this embodiment, the mounting bracket 2 also includes a second support portion 22 extending along the outer periphery of the first support portion 21 toward one side of the circuit board 1. The GNSS antenna also includes a parasitic unit 5 attached to the first support portion 21 and the second support portion 22, opposite to the radiating element 3, with one end of the parasitic unit 5 connected to the circuit board 1. Figure 1 , Figure 4 and Figure 5As shown, the second support portion 22 is generally annular, forming a hollow semi-shell structure with the first support portion 21. Compared to using a solid structure to support the radiator 31, such as a traditional ceramic antenna, this obviously reduces weight. Furthermore, the first support portion 21, the second support portion 22, the mounting portion 23, and the limiting portion 24 are an integral structure, for example, integrally molded using injection molding, which further reduces weight and facilitates manufacturing.

[0035] Four parasitic units 5 are provided, each located on the outer side of one of the four radiators 31. Each parasitic unit 5 is arc-shaped, with one portion attached to the second support 22 and another portion attached to the first support 21, allowing for a relatively stable connection to the mounting bracket 2. The lower end of each parasitic unit 5 is connected to the circuit board 1, and the upper end is coupled to the radiator 31, effectively suppressing surface reverse current and thus effectively resisting multipath interference. Furthermore, the parasitic units 5 can extend the ground plane, thereby increasing the angular range for receiving satellite signals, thus expanding bandwidth and improving gain.

[0036] Specifically, the coupling gap between the parasitic element 5 and the radiating element 3 is 1 / 20λ-1 / 10λ, where λ is the wavelength corresponding to the center frequency of the GNSS antenna. Within this size range, the antenna performance indicators can be maintained while the antenna size can be effectively controlled.

[0037] Furthermore, in this embodiment, a limiting groove 221 is formed on the second support portion 22; a connecting portion 51 that is engaged in the limiting groove 221 is formed at one end of the parasitic unit 5. Figure 1 , Figure 4 and Figure 5 As shown, four limiting grooves 221 are provided on the outer periphery of the second support part 22. The lower end of the parasitic unit 5 forms a connecting part 51 that extends into the limiting groove 221 and toward one side of the circuit board 1. The lower end of the connecting part 51 is connected to the circuit board 1. The two sides of the connecting part 51 are locked in the limiting groove 221, which further improves the firmness of the connection between the parasitic unit 5 and the mounting bracket 2, ensuring that when the GNSS antenna is in use, the parasitic unit 5 part can not only expand the bandwidth, but also has good structural stability.

[0038] Additionally, in this embodiment, the GNSS antenna also includes a shielding cover 6 fixedly disposed on the side of the circuit board 1 away from the radiating element 3. Figure 2 and Figure 5 As shown, the shielding cover 6 is fixedly installed on the lower side of the circuit board 1. In practical applications, it can prevent wireless signals generated by other electronic devices in the car from interfering with the radiating unit 3, thereby improving the anti-interference capability of the GNSS antenna.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A GNSS antenna, characterized in that, include: Circuit board; The mounting bracket includes a first support part, a mounting part, and a limiting part. The mounting part is connected to the circuit board, and the limiting part is disposed between the first support part and the circuit board. A radiating unit is disposed on the support portion, with one end passing through the limiting portion and connected to the circuit board; A power supply unit is disposed in the limiting part and is abutted or coupled to the radiation unit, with one end connected to the circuit board.

2. The GNSS antenna as described in claim 1, characterized in that, The limiting part has a first limiting strip hole and a second limiting strip hole. One end of the radiating unit passes through the first limiting strip hole, and the feeding unit passes through the second limiting strip hole.

3. The GNSS antenna as described in claim 2, characterized in that, The first limiting strip hole and the second limiting strip hole are arranged side by side; The portion of the radiation unit located in the first limiting strip hole is the first coupling part; The portion of the power supply unit located in the second limiting strip hole is the second coupling part, and the second coupling part is coupled to the first coupling part.

4. The GNSS antenna as described in claim 3, characterized in that, The radiating unit includes four radiators arranged sequentially along the circumference of the feeding unit, and the main body of the radiator is attached to the first support. The power supply unit includes two U-shaped power supply bodies arranged in a cross configuration. The two ends of the power supply bodies form the second coupling portion, and one end of the power supply body is connected to the circuit board.

5. The GNSS antenna as described in claim 4, characterized in that, The main body of the radiator has a fan-shaped structure with T-shaped and / or strip-shaped slits formed thereon; The length of the gap is 1 / 10λ-1 / 4λ, where λ is the wavelength corresponding to the center frequency of the GNSS antenna.

6. The GNSS antenna as described in claim 4, characterized in that, The mounting bracket includes four limiting parts.

7. The GNSS antenna as described in any one of claims 1 to 6, characterized in that, The mounting bracket further includes a second support portion extending along the outer periphery of the first support portion toward one side of the circuit board; The GNSS antenna also includes a parasitic unit attached to the first support and the second support, opposite to the radiating unit, with one end of the parasitic unit connected to the circuit board.

8. The GNSS antenna as described in claim 7, characterized in that, The coupling gap between the parasitic element and the radiating element is 1 / 20λ-1 / 10λ, where λ is the wavelength corresponding to the center frequency of the GNSS antenna.

9. The GNSS antenna as described in claim 7, characterized in that, A limiting groove is formed on the second support portion; One end of the parasitic unit has a connecting portion that is engaged in the limiting groove.

10. The GNSS antenna as claimed in claim 7, characterized in that, Also includes: The first support part, the second support part, the mounting part and the limiting part are an integral structure.

Images