Real-time adjustable radar wave dihedral corner reflector

Abstract

The utility model relates to the field of radar wave reflectors, and particularly discloses a real-time adjustable radar wave dihedral corner reflector which comprises two radar wave reflectivity adjustable material plates which are perpendicular to each other, and each radar wave reflectivity adjustable material plate comprises a backing layer and a reflectivity adjustable material layer fixedly arranged on the backing layer. The antenna can form a strong electromagnetic wave reflection effect in multiple directions, is suitable for carrying out conformal design with equipment, and is beneficial to reducing the cost and improving the multi-scattering problem compared with a trihedral angle structure.

Description

Technical Field

[0001] This application relates to the field of radar wave reflectors, and in particular to a real-time adjustable radar wave dihedral reflector. Background Technology

[0002] Radar detection, identification, and navigation technologies, with their all-weather and all-time operating characteristics, have been widely used in fields such as marine navigation, satellite positioning, and environmental monitoring. As an important supporting equipment for radar systems, radar calibration devices play a crucial role in equipment calibration, detection training, and system verification. Among these, corner reflectors, due to their unique electromagnetic properties, are the most typical calibration structure. This device guides electromagnetic waves to generate reflection through a specific geometric structure, enabling the formation of radar echoes equivalent to real targets at predetermined azimuths. Therefore, it is widely used in scenarios such as weather buoys and UAV navigation calibration, effectively supporting the electromagnetic characteristic simulation needs of surface facilities and aerial targets.

[0003] It is worth noting that modern radar calibration devices have placed higher demands on the performance of corner reflectors, driving innovation in reflector material technology—currently, new corner reflectors use radar wave reflectivity tunable material plates as core components. These material plates typically consist of a backing layer and a reflectivity tunable material layer. The reflectivity tunable material layer, based on a periodic array structure with loaded electronic devices, a mechanically adjustable reflective unit array, or a tunable material, dynamically adjusts its surface impedance characteristics through electronic control and mechanical regulation, thereby achieving dynamic control of radar wave reflectivity and enhancing the device's adaptability to different detection environments.

[0004] In existing technologies, trihedral reflector structures dominate: their stable geometric framework, constructed from orthogonal planes, not only possesses excellent mechanical properties to meet the requirements of lightweight and high-strength applications, but also maintains stable electromagnetic scattering characteristics over a wide frequency band and large incident angle range. However, due to the complex geometric characteristics of the three orthogonal planes, the incident electromagnetic wave may undergo three or more non-sequential reflections (such as path crossings and edge diffraction), leading to multipath signal superposition, phase mismatch, and polarization coupling. This can trigger multiple scattering effects, causing echo distortion and limiting its application accuracy in multi-interference environments. Utility Model Content

[0005] To improve the problem of multiple scattering in trihedral reflectors, this application provides a real-time adjustable radar wave dihedral reflector.

[0006] This application provides a real-time adjustable radar wave dihedral reflector using the following technical solution:

[0007] A real-time adjustable radar wave dihedral reflector includes two mutually perpendicular radar wave reflectivity adjustable material plates, each comprising a backing layer and a reflectivity adjustable material layer fixedly disposed on the backing layer.

[0008] Furthermore, the material of the backing layer is metal, resin, or nylon.

[0009] Furthermore, the reflectivity-tunable material layer is a periodic array structure for loading electronic devices.

[0010] Furthermore, the electronic device is a diode, capacitor, inductor, or resistor.

[0011] Furthermore, the reflectivity-adjustable material layer is a mechanically adjustable reflectivity control unit array structure.

[0012] Furthermore, the reflectivity-tunable material layer is made of a tunable material.

[0013] Furthermore, the tunable material is graphene, liquid crystal, or ITO material.

[0014] Furthermore, when the reflectivity-adjustable material layer is a rigid structure, the reflectivity-adjustable material layer and the backing layer are bonded together or integrally formed.

[0015] Furthermore, when the reflectivity-adjustable material layer is a flexible structure, the reflectivity-adjustable material layer is applied to the surface of the backing layer and fixed by adhesive bonding.

[0016] Furthermore, the radar wave reflectivity adjustable material plate is a square, a rounded rectangle, or a triangle.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] 1. The two radar wave reflectivity adjustable material plates that make up the dihedral reflector are perpendicular to each other, which can form a strong electromagnetic wave reflection effect in multiple directions;

[0019] 2. The geometric shape of the dihedral structure is suitable for conformal design with equipment, and can be placed at the connection of the equipment structure without affecting the realization of other mechanical, electronic, loading and other functions;

[0020] 3. Compared to the trihedral structure, the number of surfaces to be covered by the dihedral reflector is reduced, thereby reducing the area of ​​the adjustable material plate used, lowering costs, and improving the economy of structural components;

[0021] 4. Compared to trihedral structures, dihedral structures are better at improving multiple scattering problems, thereby enhancing their application accuracy in complex electromagnetic environments. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0023] Reference numerals: 1. Radar wave reflectivity adjustable material plate; 2. Backing layer; 3. Reflectivity adjustable material layer. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1 This application will be described in further detail.

[0025] This application discloses a real-time adjustable radar wave dihedral reflector. (Refer to...) Figure 1 The real-time adjustable radar wave dihedral reflector includes two mutually perpendicular radar wave reflectivity adjustable material plates 1, each of which is a square, rounded rectangle, or triangle. In this embodiment, the radar wave reflectivity adjustable material plate 1 is a square with a side length ranging from 0.01 to 10 m.

[0026] Reference Figure 1 The radar wave reflectivity adjustable material plate 1 includes a backing layer 2 and a reflectivity adjustable material layer 3 fixedly disposed on the backing layer 2; the backing layer 2 is located on the outside of the radar wave reflectivity adjustable material plate 1, and the reflectivity adjustable material layer 3 is located on the inside of the radar wave reflectivity adjustable material plate 1.

[0027] In one feasible implementation, the reflectivity-tunable material layer 3 is a periodic array structure loaded with electronic devices, wherein the electronic devices are diodes, capacitors, inductors, or resistors. By changing the bias voltage or current to adjust the equivalent impedance of the array units, the reflectivity and phase characteristics of the reflected wave can be dynamically adjusted.

[0028] In another feasible implementation, the reflectivity-adjustable material layer 3 is a mechanically adjustable reflectivity control unit array structure. By changing the geometric dimensions of the unit structure (such as the area of ​​the metal patch or the thickness of the dielectric layer) through mechanical stretching, deformation driving, etc., broadband reflectivity characteristics can be adjusted.

[0029] In another feasible implementation, the reflectivity-tunable material layer 3 is made of tunable materials such as graphene, liquid crystal, or ITO (Indium Tin Oxide). By using an external electric field to change the dielectric constant or conductivity of the tunable material, polarization conversion and phase modulation of the reflected wave are directly achieved at the material level.

[0030] When the reflectivity tunable material layer 3 is controlled by an electrical signal, its external leads should be hidden on the back of the reflectivity tunable material layer 3 to avoid unnecessary radar wave scattering caused by the leads.

[0031] The backing layer 2 serves to support and maintain the shape. The backing layers 2 of the two radar wave reflectivity adjustable material plates 1 are fixedly connected at a 90° angle. They can be welded or bonded, or manufactured by integral molding.

[0032] If the reflectivity-adjustable material layer 3 does not contain a metal backing plate, then the backing layer 2 is made of a metal plate with good conductivity; if the reflectivity-adjustable material layer 3 contains a metal backing plate, then the backing layer 2 can be made of a plate made of materials such as metal, resin, or nylon.

[0033] On the other hand, the bonding and fixing method between the reflectivity adjustable material layer 3 and the backing layer 2 needs to be considered: if the reflectivity adjustable material layer 3 is a rigid structure, the reflectivity adjustable material layer 3 and the backing layer 2 are fixed by adhesive bonding or integral molding; if the reflectivity adjustable material layer 3 is a flexible structure, the reflectivity adjustable material layer 3 is applied to the surface of the backing layer 2 and fixed by adhesive bonding.

[0034] This embodiment provides a real-time adjustable radar wave dihedral reflector that retains only two orthogonal planes. Electromagnetic waves only need two reflections to return along their original path, significantly reducing redundant reflection paths and polarization rotations, thereby reducing multipath interference and signal distortion. Simultaneously, by simplifying the geometric configuration, it suppresses higher-order scattering modes, which is beneficial for improving the multiple scattering problem of trihedral reflectors. Furthermore, compared to trihedral reflectors, dihedral reflectors are advantageous in reducing costs and are more suitable for conformal design with equipment.

[0035] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A real-time adjustable radar wave dihedral reflector, characterized in that: It includes two mutually perpendicular radar wave reflectivity adjustable material plates, each comprising a backing layer and a reflectivity adjustable material layer fixedly disposed on the backing layer.

2. The real-time adjustable radar wave dihedral reflector according to claim 1, characterized in that: The backing layer is made of metal, resin, or nylon.

3. The real-time adjustable radar wave dihedral reflector according to claim 1, characterized in that: The reflectivity-tunable material layer is a periodic array structure for loading electronic devices.

4. A real-time adjustable radar wave dihedral reflector according to claim 3, characterized in that: The electronic device is a diode, capacitor, inductor, or resistor.

5. A real-time adjustable radar wave dihedral reflector according to claim 1, characterized in that: The reflectivity-adjustable material layer is a mechanically adjustable reflectivity control unit array structure.

6. A real-time adjustable radar wave dihedral reflector according to claim 1, characterized in that: The reflectivity-tunable material layer is made of a tunable material.

7. A real-time adjustable radar wave dihedral reflector according to claim 6, characterized in that: The tunable material is graphene, liquid crystal, or ITO material.

8. A real-time adjustable radar wave dihedral reflector according to claim 1, characterized in that: When the reflectivity-adjustable material layer is a rigid structure, the reflectivity-adjustable material layer and the backing layer are bonded together or integrally formed.

9. A real-time adjustable radar wave dihedral reflector according to claim 1, characterized in that: When the reflectivity-adjustable material layer is a flexible structure, the reflectivity-adjustable material layer is applied to the surface of the backing layer and fixed by adhesive bonding.

10. A real-time adjustable radar wave dihedral reflector according to claim 1, characterized in that: The radar wave reflectivity adjustable material plate is square, rounded rectangle, or triangle.

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