A multifunctional GNSS antenna

Abstract

The present invention discloses a multifunctional GNSS antenna, which belongs to the field of communication technology. The multifunctional GNSS antenna of the present invention comprises a PCB board, a first dielectric board and a first radiating component which are arranged in sequence, the PCB board and the first radiating component are connected through a first feeding component, a second radiating component and a plurality of metallized vias are also arranged on the first dielectric board, the second radiating component is connected to the PCB board through a second feeding component, a plurality of the metallized vias are arranged around the first radiating component, and the second radiating component is arranged on the outside of the plurality of the metallized vias. The multifunctional GNSS antenna of the present invention effectively reduces the signal interference and coupling of the second radiating component to the first radiating component, which is conducive to the miniaturization of the antenna.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a multifunctional GNSS antenna. Background Art

[0002] With the development of Internet of Things communication technology and GNSS satellite navigation and positioning systems, GNSS navigation and high-precision positioning equipment are moving towards miniaturization and multi-functionality. While realizing navigation and positioning functions, it is also necessary to have functions such as mobile cellular communication, WIFI, Bluetooth, and private network communication. The traditional design adopts the idea of ​​separating each antenna, which increases the number of antennas, increases the equipment cost, and is not conducive to miniaturization design.

[0003] At present, separately designed antennas are generally integrated together. For example, the 4G antenna and WIFI antenna are directly placed around the GNSS antenna. Although the size of the antenna is reduced to a certain extent, this method does not take into account the interference and coupling between antennas, which makes it easy for the GNSS signal to be interfered with, reduce positioning accuracy, and even cause satellite loss of lock. Summary of the invention

[0004] In order to address the deficiencies of the prior art, an embodiment of the present invention provides a multifunctional GNSS antenna, which can effectively reduce interference and coupling between antennas and is conducive to miniaturization of the antenna.

[0005] In order to achieve the above-mentioned purpose, an embodiment of the present invention provides a multifunctional GNSS antenna, comprising a PCB board, a first dielectric board and a first radiating component arranged in sequence, the PCB board and the first radiating component are connected through a first feeding component, a second radiating component and a plurality of metallized vias are also arranged on the first dielectric board, the second radiating component is connected to the PCB board through a second feeding component, the plurality of metallized vias are arranged around the first radiating component, and the second radiating component is arranged on the outside of the plurality of metallized vias.

[0006] Optionally, a boss is provided on the first dielectric plate, the boss is arranged around the first radiation component, and the metallized via is provided on the boss.

[0007] Optionally, it further includes a second dielectric board and a third radiation component, the second dielectric board is arranged on the first radiation component, the third radiation component is arranged on the second dielectric board, and the third radiation component is connected to the PCB board through a third feeding component.

[0008] Optionally, along the circumferential direction of the first radiation component, the boss includes multiple sections, a positioning groove is provided between two adjacent sections of the boss, and a positioning block is provided on the second dielectric plate, and the positioning block is embedded in the positioning groove.

[0009] Optionally, the metallized via hole is provided in the positioning groove, the positioning block is fastened to the positioning groove by means of a stud, and the stud cooperates with the metallized via hole located on the positioning groove.

[0010] Optionally, a first circuit network and a second circuit network are provided on the PCB board;

[0011] The first circuit network comprises a feeding network, a first filtering circuit and a low-noise amplifier circuit which are connected in sequence, and the feeding network is connected to the first feeding component and the third feeding component respectively;

[0012] The second circuit network includes a second filtering circuit connected to the second feeding component.

[0013] Optionally, the first circuit network and the second circuit network are arranged on a side of the PCB board facing away from the first dielectric board, and a shielding cover is provided on a side of the PCB board facing away from the first dielectric board, and the first circuit network and the second circuit network are covered in the shielding cover.

[0014] Optionally, a grounding short-circuit column is provided on the second radiation component, one end of the grounding short-circuit column is connected to the second radiation component, and the other end of the grounding short-circuit column is grounded.

[0015] Optionally, the second radiation component includes a plurality of metal layers, the plurality of metal layers are interconnected, and the plurality of metal layers include at least one metal layer disposed on the surface of the first dielectric plate and at least one metal layer disposed on the side surface of the first dielectric plate.

[0016] Optionally, a plurality of the second radiation components are included, and the plurality of the second radiation components are circumferentially arranged along the periphery of the first dielectric plate.

[0017] Beneficial effects of the present invention:

[0018] The present invention discloses a multifunctional GNSS antenna, comprising a PCB board, a first dielectric board and a first radiating component arranged in sequence, the PCB board and the first radiating component are connected through a first feeding component, a second radiating component and a plurality of metallized vias are also arranged on the first dielectric board, the second radiating component is connected to the PCB board through the second feeding component, a plurality of the metallized vias are arranged around the first radiating component, and the second radiating component is arranged outside the plurality of the metallized vias. The multifunctional GNSS antenna of the present invention has a plurality of metallized vias arranged around the first radiating component, the metallized vias increase the capacitive coupling, the plurality of metallized vias form protection for the first radiating component located therein, effectively reducing the signal interference and coupling of the third radiating component to the first radiating component, and is conducive to miniaturization of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The advantages of the above and / or additional aspects of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a schematic structural diagram of the multifunctional GNSS antenna of an embodiment of the present invention after the second dielectric plate is removed;

[0021] Figure 2 yes Figure 1 The main view;

[0022] Figure 3 is a schematic structural diagram of a multifunctional GNSS antenna according to an embodiment of the present invention;

[0023] Figure 4 yes Figure 3 The main view;

[0024] Figure 5 is a schematic cross-sectional structure diagram of a multifunctional GNSS antenna according to an embodiment of the present invention;

[0025] Figure 6 Schematic diagram of the structure of the second dielectric plate in the embodiment of the present invention.

[0026] in Figures 1 to 6 The corresponding relationship between the reference numerals and the component names is as follows:

[0027] 1. PCB board; 2. first dielectric board; 3. first radiation component; 4. second radiation component; 5. metallized via; 6. second dielectric board; 7. third radiation component; 8. shielding cover; 20. boss; 21. cavity; 22. positioning groove; 30. first feeding component; 40. second feeding component; 41. grounding short-circuit column; 60. positioning block; 61. stud; 70. third feeding component; 300. first tuning branch; 400. first metal layer; 401. second metal layer; 402. third metal layer; 403. fourth metal layer; 700. second tuning branch. DETAILED DESCRIPTION

[0028] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0029] Reference Figures 1 to 6 An embodiment of the present invention provides a multifunctional GNSS antenna, which mainly includes a PCB board 1, a first dielectric board 2 and a first radiating component 3 arranged in sequence, the PCB board 1 and the first radiating component 3 are connected through a first feeding component 30, a second radiating component 4 and a plurality of metallized vias 5 are arranged on the first dielectric board 2, the second radiating component 4 is connected to the PCB board 1, the plurality of metallized vias 5 are arranged around the first radiating component 3, and the second radiating component 4 is arranged on the outside of the plurality of metallized vias 5.

[0030] At work, if Figure 2 , the current generated by the second radiating component 4 will be coupled to the first radiating component 3, thereby coupling and interfering with the signal of the first radiating component 3, affecting the performance of the first radiating component 3. In this embodiment, the current on the second radiating component 4 is intervened by multiple metallized vias 5, so that the current generated on the second radiating component 4 is coupled to the metallized vias 5, and part of the current is radiated, thereby reducing the energy coupled to the first radiating component 3, thereby improving the isolation and interference of the antenna; in addition, after the current generated by the first radiating component 3 is coupled to the metallized vias 5, the radiation aperture of the first radiating component 3 becomes larger, which has the effect of reducing the frequency of the first radiating component 3. Therefore, when the same resonant frequency is achieved, the size of the first radiating component 3 is smaller, which is conducive to the miniaturization of the antenna.

[0031] In an optional embodiment, the PCB board 1, the first dielectric board 2, the first radiating component 3 and the first feeding component 30 constitute a first antenna unit, and the first antenna unit can be selected to realize the navigation and positioning function. The PCB board 1, the first dielectric board 2, the second radiating component 4 and the second feeding component 40 constitute a second antenna unit, and the second antenna unit can be selected to realize a communication function, such as 4G communication, Bluetooth communication, etc. Therefore, based on the technical solution of the embodiment of the present invention, the integration of the navigation and positioning antenna and the communication antenna can be realized, so that an integral antenna realizes multiple functions such as navigation and positioning, communication, etc. At the same time, it can also achieve the effect of reducing the interference and coupling of the communication antenna to the navigation and positioning antenna, and realizing the miniaturization of the antenna.

[0032] In an embodiment of the present invention, the metallized vias 5 may be arranged evenly along the periphery of the first radiating component 3, and a plurality of metallized vias 5 may be arranged around the periphery of the first radiating component 3 to form a ring structure, which is equivalent to forming a protection ring for the first radiating component 3 within the ring structure to avoid signal interference and coupling of the first radiating component 3 by the antenna device outside the protection ring.

[0033] As a further example, a boss 20 is provided on the first dielectric plate 2, the boss 20 is provided around the first radiation component 3, and the above-mentioned metallized via 5 is provided on the boss 20. In this embodiment, the boss 20 further improves the coupling effect of the metallized via 5 on the first radiation component 3 and the second radiation component 4, and improves the isolation between the first antenna unit and the second antenna unit.

[0034] like Figures 3 to 6 The multifunctional GNSS antenna further includes a second dielectric plate 6 and a third radiating component 7. The second dielectric plate 6 is disposed on the first radiating component 3, the third radiating component 7 is disposed on the second dielectric plate 6, and the third radiating component 7 is connected to the PCB board 1 via a third feeding component 70. In this embodiment, the second dielectric plate 6, the third radiating component 7 and the third feeding component 70 can be selected as parts of the first antenna unit, wherein the first radiating component 3 and the third radiating component 7 respectively generate resonant frequencies of different frequency bands. In a specific embodiment, the first radiating component 3 is used to generate a resonant frequency corresponding to the GNSS L2 frequency band, and the third radiating component 7 is used to generate a resonant frequency corresponding to the GNSS L1 frequency band. The first antenna unit covers the GNSS L1 and L2 frequency bands, thereby realizing the function of GNSS navigation and positioning.

[0035] The boss 20 extends upward from the first dielectric plate 2, and a cavity 21 is formed in the inner circle of the boss 20. In this embodiment, the cavity 21 is used for installing the second dielectric plate 6. Optionally, the boss 20 includes multiple sections, and a positioning groove 22 is provided between two adjacent sections of the boss 20. The second dielectric plate 6 is provided with a positioning block 60 corresponding to the positioning groove 22. When the second dielectric plate 6 is installed, the positioning block 60 is embedded in the positioning groove 22. In this embodiment, the second dielectric plate 6 can be quickly positioned through the matching structure of the positioning groove 22 and the positioning block 60, which facilitates the installation of the second dielectric plate 6.

[0036] In an optional embodiment, the second dielectric plate 6 is fastened to the first dielectric plate 2 by a stud 61 to prevent the second dielectric plate 6 from loosening. In a specific embodiment, the positioning block 60 and the positioning groove 22 can be fastened by a stud 61, wherein the positioning groove 22 can be provided with the above-mentioned metallized via 5, and the stud 61 cooperates with the metallized via 5. At this time, the metallized via 5 takes into account the function of fastening the first dielectric plate 2 and the second dielectric plate 6. The stud 61 can be an insulating plastic stud or a conductive metal stud.

[0037] In an embodiment of the present invention, a first circuit network and a second circuit network are provided on the PCB board 1. The first circuit network includes a feed network, a first filter circuit and a low-noise amplifier circuit connected in sequence, and the feed network is connected to the first feed component 30 and the third feed component 70 respectively. In this embodiment, after the GNSS antenna receives the signal, the signal first passes through the feed network, and then passes through the first filter circuit to filter out the communication signal in the signal, such as 4G communication signal, Bluetooth communication signal, etc. Finally, the signal after filtering is amplified by the low-noise amplifier circuit. Due to the effect of the first filter circuit, the communication signal is filtered out, so the signal interference of the communication antenna can be avoided, and the accuracy of navigation positioning can be ensured. The second circuit network includes a second filter circuit, and the second filter circuit is connected to the second feed component 40. After the signal passes through the second filter circuit, the navigation positioning signal and the irrelevant communication signal in the signal are filtered out. For example, the second radiating component 4 is used to realize 4G communication. At this time, the second filter circuit is also used to filter out other communication signals except 4G communication to avoid interference from other signals.

[0038] The first circuit network and the second circuit network may be selectively arranged on a side of the PCB board 1 that is away from the first dielectric board 2. To this end, in an optional embodiment, a shielding cover 8 is arranged on a side of the PCB board 1 that is away from the first dielectric board 2, and the shielding cover 8 covers the first circuit network and the second circuit network therein to prevent interference from external signals.

[0039] The first feeding component 30, the second feeding component 40 and the third feeding component 70 can be selected as coaxial probes. Taking the first feeding component 30 as an example, the coaxial probe sequentially passes through the first dielectric plate 2 and the first radiating component 3, one end of which is connected to the first radiating component 3, and the other end is connected to the PCB board 1. In an optional embodiment, the first feeding component 30 and the third feeding component 70 can be selected as a plurality of coaxial probes, preferably 4, and the second feeding component 40 can be selected as 1 coaxial probe.

[0040] In the embodiment of the present invention, a ground short-circuit column 41 is further provided on the second radiation component 4. Specifically, the ground short-circuit column 41 runs through the second radiation component 4, the first dielectric board 2 and the PCB board 1, one end of the ground short-circuit column 41 is connected to the second radiation component 4, and the other end is grounded. For example, the grounded end of the ground short-circuit column 41 can be selected to be connected to a ground plate.

[0041] It should be noted that, in the embodiment of the present invention, the ground to which the ground short-circuit column 41 is connected is the same ground as the bottom surface of the first dielectric plate 2. It can also be understood that the ground to which the ground short-circuit column 41 is connected is different from the bottom surface of the second dielectric plate 6. Therefore, after the second dielectric plate 6 and the third radiating component 7 are set, the signal generated by the second radiating component 4 has little effect on the signal generated by the third radiating component 7.

[0042] In an optional embodiment, the second radiation component 4 includes a plurality of metal layers, the plurality of metal layers are interconnected, and the plurality of metal layers include at least one metal layer disposed on the surface of the first dielectric plate 2 and at least one metal layer disposed on the side of the first dielectric plate 2. In this embodiment, the second radiation component 4 is an inverted F-type antenna, and the plurality of metal layers have different sizes, so the plurality of metal layers have different resonant frequencies to match signals of different frequency bands. In a specific embodiment, the second radiation component 4 includes a first metal layer 400, a second metal layer 401, a third metal layer 402, and a fourth metal layer 403, wherein the first metal layer 400 is disposed at the edge of the upper surface of the first dielectric plate 2, the second metal layer 401, the third metal layer 402, and the fourth metal layer 403 are disposed on the side of the first dielectric plate 2, the second metal layer 401 and the third metal layer 402 are respectively connected to the first metal layer 400, and the third metal layer 402 is also connected to the fourth metal layer 403. In this embodiment, the second radiation component 4 realizes omnidirectional radiation in the horizontal plane.

[0043] In an optional embodiment, a plurality of second radiating components 4 are included, and the plurality of second radiating components 4 are sequentially arranged along the circumferential direction of the first dielectric plate 2. The plurality of second radiating components 4 can be selected to realize different functions. For example, the plurality of second radiating components 4 can be selected to include a second radiating component 4 for realizing a 4G communication function and a second radiating component 4 for realizing a Bluetooth communication function. In a specific embodiment, the second radiating components 4 include three, wherein one second radiating component 4 is used to realize Bluetooth communication, and the other two second radiating components 4 are used to realize 4G communication. In this embodiment, the second radiating component 4 for realizing Bluetooth communication forms a Bluetooth antenna with the PCB board 1, the first dielectric plate 2 and the corresponding second feeding component 5, and the second radiating component 4 for realizing 4G communication forms a 4G communication antenna with the PCB board 1, the first dielectric plate 2 and the corresponding second feeding component, wherein the 4G communication antenna uses two radiating components for high-speed data transmission. In general, the 4G communication antenna can also use one radiating component.

[0044] In the embodiment of the present invention, the first radiation component 3 can be selected as a metal layer attached to the upper surface of the first dielectric plate 2 , and the third radiation component 7 can be selected as a metal layer attached to the upper surface of the second dielectric plate 6 .

[0045] The edge of the first radiation component 3 is provided with a first tuning branch 300 extending outward, and the first tuning branch 300 is used to fine-tune the resonant frequency of the first radiation component 3; the edge of the third radiation component 7 is provided with a second tuning branch 700 extending outward, and the second tuning branch 700 is used to fine-tune the resonant frequency of the third radiation component 4.

[0046] In summary, the multifunctional GNSS antenna of the embodiment of the present invention has the functions of GNSS navigation positioning, 4G communication, and Bluetooth communication at the same time. It integrates multiple antenna functions into one antenna, which significantly saves installation space compared to multiple antennas designed separately. On the basis of multiple antennas being integrated together, in the embodiment of the present invention, each antenna has good isolation and anti-mutual interference capabilities, so the performance of the multifunctional GNSS antenna can be ensured, especially when the first antenna unit is used as a navigation positioning antenna, the interference and coupling of the communication antenna to it can be reduced, the positioning accuracy can be ensured, and the phenomenon of satellite loss of lock can be avoided; the metallized via also couples with the first radiating component, thereby increasing the radiation aperture of the first radiating component, so that the resonant frequency of the first radiating component is reduced. Accordingly, in order to achieve the preset resonant frequency, the required size of the first radiating component is reduced accordingly, the size of the first radiating component is reduced, and then the size of the entire antenna is reduced accordingly, which is conducive to the miniaturization design of the antenna.

[0047] In the description of the present invention, it should be noted that the terms "upper", "lower", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the inside of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional GNSS antenna, characterized in that: The invention comprises a PCB board, a first dielectric board and a first radiating component which are arranged in sequence, wherein the PCB board and the first radiating component are connected through a first feeding component, a second radiating component and a plurality of metallized vias are also arranged on the first dielectric board, the second radiating component and the PCB board are connected through a second feeding component, a plurality of the metallized vias are arranged around the first radiating component, and the second radiating component is arranged outside the plurality of the metallized vias; A boss is provided on the first dielectric plate, the boss is arranged around the first radiation component, and the metallized via is provided on the boss; It also includes a second dielectric plate and a third radiation component, wherein the second dielectric plate is arranged on the first radiation component, the third radiation component is arranged on the second dielectric plate, and the third radiation component is connected to the PCB board through a third feeding component; Along the circumferential direction of the first radiation component, the boss includes multiple sections, a positioning groove is provided between two adjacent sections of the boss, and a positioning block is provided on the second dielectric plate, and the positioning block is embedded in the positioning groove; A grounding short-circuit column is disposed on the second radiation component, one end of the grounding short-circuit column is connected to the second radiation component, and the other end of the grounding short-circuit column is grounded.

2. The multifunctional GNSS antenna according to claim 1, characterized in that: The metallized via hole is arranged in the positioning groove, the positioning block is fastened to the positioning groove by means of a stud, and the stud cooperates with the metallized via hole located on the positioning groove.

3. The multifunctional GNSS antenna according to claim 2, characterized in that: The PCB board is provided with a first circuit network and a second circuit network; The first circuit network comprises a feeding network, a first filtering circuit and a low-noise amplifier circuit which are connected in sequence, and the feeding network is connected to the first feeding component and the third feeding component respectively; The second circuit network includes a second filtering circuit connected to the second feeding component.

4. The multifunctional GNSS antenna according to claim 3, characterized in that: The first circuit network and the second circuit network are arranged on a side of the PCB board away from the first dielectric board. A shielding cover is arranged on a side of the PCB board away from the first dielectric board. The first circuit network and the second circuit network are covered in the shielding cover.

5. The multifunctional GNSS antenna according to claim 1, characterized in that: The second radiation component includes a plurality of metal layers, the plurality of metal layers are connected to each other, and the plurality of metal layers include at least one metal layer disposed on the surface of the first dielectric plate and at least one metal layer disposed on the side surface of the first dielectric plate.

6. The multifunctional GNSS antenna according to claim 5, characterized in that: A plurality of the second radiation components are included, and the plurality of the second radiation components are arranged along the periphery of the first dielectric plate.

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