GNSS anti-interference device

Abstract

The utility model provides a GNSS (Global Navigation Satellite System) anti-interference device, which comprises a radome body, a shielding piece, an antenna base and a first connecting piece, and is characterized in that the shielding piece is connected with the radome body through the first connecting piece; the antenna housing body is arranged in the shielding piece; the shielding piece is fixed on the antenna base, and the inclination angle and the direction of the shielding piece can be adjusted through the antenna base. When interference is generated, the inclination angle and the direction of the shielding piece are adjusted through the base, so that the shielding piece and the antenna face the opposite direction of the interference, and a better suppression effect can be generated; the shielding piece can incline towards any angle and direction, and the electromagnetic interference problem of most coming directions is solved by matching with the adjustment of the height of the antenna.

Description

Technical Field

[0001] This invention relates to the field of satellite navigation technology, and more specifically, to a GNSS anti-jamming device. Background Technology

[0002] Existing GNSS (Global Navigation Satellite System) anti-jamming technologies can be divided into hardware and software technologies. Hardware-wise, through the design of four or more adaptive antenna array modules and RF unit filters, and employing adaptive antenna nulling technology, in-band interference from three directions can be suppressed, but the cost is high. Software-wise, techniques such as spectral elimination and FFT (Fast Fourier Transmission) can be used to process intermediate frequency signals to achieve interference suppression; however, this method is only effective against narrowband interference. In practical satellite navigation applications, the types of interference, such as harmonics and octaves, generated by some integrated devices are complex and varied, making it difficult for existing hardware and software anti-jamming technologies to fully utilize their advantages.

[0003] In the prior art, Chinese patent CN219591656U discloses an anti-interference radome, comprising: a support member; an radome including a base and a cover; an antenna built into the cover, the cover being fastened to the base; the base being located on the support member; and a shielding member disposed on the support member and forming an internal space for placing the radome; wherein the angle between the line connecting the phase center of the antenna and the point on the top of the shield that is farthest from the phase center of the antenna and the horizontal plane is adjustable.

[0004] In addition, Chinese patent CN113675609A discloses a shield, an antenna, and an antenna mounting bracket. The shield has a top opening and is used to surround the antenna body to shield interference signals.

[0005] The technical problem is that the tilt angle and direction of the shielding component and the shielding cover cannot be adjusted, which cannot effectively suppress interference, and the applicable environment and occasion are limited. Utility Model Content

[0006] This invention proposes a GNSS anti-interference device to solve the technical problems existing in the prior art.

[0007] The GNSS anti-interference device provided by the present invention includes: an antenna radome, a shielding component, and an antenna base.

[0008] Specifically, it also includes a first connector, through which the shield and the antenna radome are connected; the antenna radome is disposed inside the shield; the shield is fixed on the antenna base, and the tilt angle and direction of the shield can be adjusted by the antenna base.

[0009] Furthermore, the shielding component is a hollow cavity structure with an opening at the top, and also includes a top cover, which is installed at the top opening of the shielding component.

[0010] Preferably, the shielding component has any one of the following structures: cylindrical, square, frustum, or bowl-shaped.

[0011] Furthermore, the antenna base includes a tilt angle adjustment component, a fourth connector, a directional adjustment component, and a base. The directional adjustment component is mounted on the base via the fourth connector. The tilt angle adjustment component is fixedly connected to the bottom of the shield and the top of the directional adjustment component.

[0012] Specifically, the tilt angle adjustment component includes a second adjustment component and a third adjustment component. The second adjustment component and the third adjustment component are fixedly connected. By adjusting the third adjustment component, the relative height of the second adjustment component can be changed, thereby adjusting the tilt angle of the shielding component.

[0013] Furthermore, the fourth connector passes through the axis of the direction adjustment component, and the direction adjustment component can rotate around the fourth connector to adjust the direction of the shield.

[0014] Furthermore, the fourth connector is fixed to the base by rotation and locking.

[0015] Specifically, the radome includes the GNSS antenna phase center, and the angle between the GNSS antenna phase center and the shield is the shielding angle θ, which is no greater than 20 degrees.

[0016] Preferably, the material of the shielding component is one or a combination of magnetic metal mesh, anti-interference magnetic sheet, glass fiber layer, and adhesive layer.

[0017] Specifically, the inside and bottom of the shielding component are coated with a layer of electromagnetic wave absorbing material.

[0018] Preferably, the electromagnetic wave absorbing material layer is made of resin.

[0019] Compared with the prior art, this utility model has the following beneficial technical effects: For any type of electromagnetic interference signal, when the incident angle of the interference signal is less than 20 degrees, the GNSS anti-interference device provided by this utility model can achieve excellent interference signal combination effect without the need for complex hardware circuits and array antenna design; when interference occurs, by adjusting the tilt angle and direction of the shielding component through the base, so that the shielding component and antenna face the opposite direction of the interference, a better suppression effect can be produced; the shielding component can be tilted at any angle and direction, and in conjunction with the adjustment of the antenna height, it can solve most of the electromagnetic interference problems from the incoming direction; the shielding component uses electromagnetic wave absorbing materials inside, which effectively reduces the multipath reflection of satellite navigation signals and some electromagnetic interference signals. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the GNSS anti-interference device of this utility model;

[0021] Figure 2 This is a schematic diagram of one embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of another embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of one working mode of the GNSS anti-interference device of this utility model;

[0024] Figure 5 This is a schematic diagram of another working mode of the GNSS anti-interference device of this utility model. Detailed Implementation

[0025] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of the 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.

[0026] 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. Some block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices. Although the terms "first" or "second," etc., are used in this specification to denote certain features, these are only for indication and not as a limitation on the number or importance of specific features.

[0027] The flowchart shown in the attached diagram is merely an illustrative example and does not necessarily include all steps. For example, some steps may be broken down, while others may be combined or partially combined. Therefore, the actual execution order may change depending on the specific circumstances.

[0028] Figure 1This is a structural schematic diagram of the GNSS anti-interference device of this utility model, showing a GNSS anti-interference device proposed by this utility model, including: an antenna radome, a shield 2, and an antenna base, and also including a first connector 4. The shield and the antenna radome are connected by the first connector 4, and the height of the first connector 4 can be freely adjusted. The antenna radome is disposed inside the shield, the shield is fixed on the antenna base, and the tilt angle and direction of the shield can be adjusted by the antenna base.

[0029] In some embodiments, the shielding member 2 is a hollow cavity structure with an opening at the top, and also includes an upper cover 1, which is installed at the upper opening of the shielding member 2.

[0030] like Figure 2 , Figure 3 As shown, in some embodiments, the shielding member 2 is any one of the following structures: cylindrical, square, frustum, or bowl-shaped.

[0031] In some embodiments, the antenna base includes a tilt angle adjustment component, a fourth connector 6, a direction adjustment component 7, and a base 8. The direction adjustment component 7 is mounted on the base 8 via the fourth connector 6. The tilt angle adjustment component is fixedly connected to the bottom of the shield 2 and the top of the direction adjustment component 7.

[0032] Figure 4 This is a detailed structural diagram of the anti-interference device of this utility model. The tilt angle adjustment component includes a second adjustment member 5 and a third adjustment member 10. The second adjustment member 5 is fixedly connected to the third adjustment member 10. By adjusting the third adjustment member 10, the relative height of the second adjustment member 5 can be changed, thereby adjusting the tilt angle of the shield 2.

[0033] In some embodiments, the fourth connector 6 passes through the axis of the direction adjustment component 7, and the direction adjustment component 7 can rotate around the fourth connector 6 to adjust the direction of the shield 2.

[0034] The fourth connector 6 is fixed to the base 8 by rotation and locking.

[0035] like Figure 5 The figure shown is an embodiment of the present invention. In actual use, the antenna radome includes a GNSS antenna phase center 9. The angle between the GNSS antenna phase center 9 and the shielding member 2 is the shielding angle θ, and the angle of the shielding angle θ is not greater than 20 degrees.

[0036] In some embodiments, the shielding element 2 is made of metal. Its material is one or a combination of magnetic metal mesh, anti-interference magnetic sheet, glass fiber layer, and adhesive layer.

[0037] In some embodiments, the interior and bottom of the shield 2 are coated with an electromagnetic wave absorbing material layer 3.

[0038] In some embodiments, the electromagnetic wave absorbing material layer (3) is made of resin.

Claims

1. A GNSS anti-jamming device comprising: The antenna cover, shielding (2) and antenna base, characterized in that: further comprising a first connecting piece (4), the shielding and the antenna cover are connected through the first connecting piece (4), the height of the first connecting piece (4) can be freely adjusted; the antenna cover is arranged inside the shielding, the shielding is fixed on the antenna base, and the inclination angle and direction of the shielding can be adjusted through the antenna base.

2. The GNSS anti-jamming device of claim 1, wherein: The shielding (2) is a hollow cavity structure with an upper opening, and further comprises an upper cover (1) installed on the upper opening of the shielding (2).

3. The GNSS anti-jamming device of claim 2, wherein: The shielding (2) is any one of a cylindrical shape, a square barrel shape, a circular truncated cone shape, and a bowl shape.

4. The GNSS anti-jamming apparatus of claim 1, wherein: The antenna base comprises an inclination angle adjusting component, a fourth connecting piece (6), a direction adjusting component (7), a base (8), the direction adjusting component (7) is installed on the base (8) through the fourth connecting piece (6), and the inclination angle adjusting component is fixedly connected with the bottom of the shielding (2) and the upper end of the direction adjusting component (7).

5. The GNSS anti-jamming device of claim 4, wherein: The inclination angle adjusting component comprises a second adjusting piece (5) and a third adjusting piece (10), the second adjusting piece (5) is fixedly connected with the third adjusting piece (10), the relative height of the second adjusting piece (5) can be changed by adjusting the third adjusting piece (10), and then the inclination angle of the shielding (2) is adjusted.

6. The GNSS anti-jamming device of claim 4, wherein: The fourth connecting piece (6) is arranged through the axis of the direction adjusting component (7), the direction adjusting component (7) can rotate around the fourth connecting piece (6), and then the direction of the shielding (2) is adjusted.

7. The GNSS anti-jamming device of claim 6, wherein: The fourth connecting piece (6) is locked on the base (8) by rotation.

8. The GNSS anti-jamming device according to any one of claims 1-7, characterized in that: The antenna cover comprises a GNSS antenna phase center (9), the included angle between the GNSS antenna phase center (9) and the shielding (2) is a shielding angle θ, and the angle of the shielding angle θ is not greater than 20 degrees.

9. The GNSS anti-jamming device according to any of claims 1-8, characterized in that: The shielding (2) is made of metal.

10. The GNSS anti-jamming device according to any one of claims 1-8, characterized in that: The shielding (2) is made of one or a combination of a magnetic metal mesh, an anti-interference magnetic sheet, a glass fiber layer, and a glue layer.

11. The GNSS anti-jamming device of claim 1, wherein: The inside and bottom of the shielding (2) are coated with an electromagnetic wave absorbing material layer (3).

12. The GNSS anti-jamming device of claim 11, wherein: The electromagnetic wave absorbing material layer (3) is made of resin.

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