Reconfigurable corner reflector

Abstract

The invention belongs to the technical field of corner reflectors, and relates to a reconfigurable corner reflector, which comprises a first support plate, a second support plate and a floor, the first support plate and the second support plate are both arranged on the floor; the first support plate and the second support plate are rotationally connected through a reconstruction assembly so as to change the dihedral angle of the corner reflector; the reconstruction assembly comprises: a rotating member; the rotating piece is connected with the first supporting plate and the second supporting plate; the reconstruction assembly further comprises a control part. The control piece is connected with the rotating piece so as to control the angle of the rotating piece; one surface of the first supporting plate is connected with one surface of the second supporting plate through the rotating piece, and the two connected surfaces of the rotating piece are equal to the rotating piece in length; and the rotating piece is vertically arranged at the midpoint position of one edge of the floor. According to the invention, the reconstruction and regulation of the scattering characteristics of the corner reflector can be realized.

Description

Technical Field

[0001] The present application relates to the technical field of corner reflectors, and in particular to a corner reflector with reconfigurable radar cross section (RCS). Background Art

[0002] Corner reflectors are usually three-dimensional rigid structures composed of two or three mutually perpendicular metal planes. They are very effective devices for passive interference countermeasures against enemy radar detection in the field of radar electronic countermeasures technology. Through special geometric structure design, corner reflectors can reflect electromagnetic waves back along the incident direction. They can be regarded as echo enhancement devices with strong radar cross section (RCS), which can produce obvious interference, deception and decoy effects on radar detection and identification. Through the array arrangement of multiple corner reflectors, false target interference similar to that of ships can be simulated to achieve the purpose of hiding the truth and showing the false, so as to reduce the probability of enemy radar detecting our high-value targets, interfere with the strike accuracy of enemy attack weapons, and thus play a role in protecting weapons and equipment and positions.

[0003] Compared with other passive interference countermeasure devices, corner reflectors have the characteristics of wide frequency coverage, large scattering cross-sectional area, long-lasting interference effect, significant interference effect, low cost and easy processing.

[0004] In the prior art, the three faces of a standard corner reflector are all 90° perpendicular to each other, and the resulting RCS pattern can cover about 30° of airspace. In order to expand the coverage of the corner reflector, one is to arrange the corner reflectors in a special configuration array, such as a tetrahedron, octahedron, icosahedron, etc., to achieve coherent superposition of the scattering field in space, expand the airspace coverage, and meet the requirements of 360° coverage of passive interference countermeasures. Second, the corner reflector can be rotated to change its pitch and azimuth orientation to achieve coverage of a larger airspace, but the control speed and accuracy are difficult to meet the requirements.

[0005] However, when the physical dimensions of the corner reflector are determined, the RCS pattern generated by a single corner reflector is determined, so its electromagnetic scattering characteristics are essentially different from those of complex structural targets such as ships. With the iterative evolution of interference and anti-interference under the new situation, the identification algorithm for fixed configuration corner reflector array interference has gradually matured, and the application scenarios of fixed configuration radar corner reflectors will be limited to a certain extent. Summary of the invention

[0006] Based on this, it is necessary to provide a corner reflector with reconfigurable radar scattering cross-section to address the above-mentioned technical problems, which can realize dynamic regulation of the scattering characteristics of the corner reflector.

[0007] A reconfigurable corner reflector comprises: a first support plate, a second support plate and a floor, all of which are flat plate structures;

[0008] The first support plate and the second support plate are both arranged on the floor;

[0009] The first support plate and the second support plate are rotatably connected via a reconstruction assembly to change the dihedral angle of the corner reflector.

[0010] In one embodiment, the reconfiguration assembly includes: a rotating member;

[0011] The rotating member connects the first supporting plate and the second supporting plate.

[0012] In one embodiment, the reconstruction component further comprises: a control member;

[0013] The control member is connected to the rotating member to control the angle of the rotating member.

[0014] In one embodiment, one surface of the first support plate is connected to one surface of the second support plate through the rotating member, and the two surfaces connected by the rotating member are of the same length as the rotating member.

[0015] In one embodiment, the rotating member is vertically arranged at the midpoint of one side of the floor.

[0016] In one embodiment, the rotating member is a hinge.

[0017] In one embodiment, the control element is a stepper motor.

[0018] In one embodiment, the shaft of the stepper motor passes through the floor and is connected to one end of the hinge.

[0019] In one embodiment, the stepper motor is connected to an external FPGA circuit.

[0020] In one embodiment, the first support plate and the second support plate are both made of square metal material.

[0021] In the above-mentioned reconfigurable corner reflector, the first support plate and the second support plate constitute a dihedral corner reflector, and the two are connected by a reconstruction component, so as to change the dihedral angle of the corner reflector through the reconstruction component, thereby reconstructing the dihedral angle of the corner reflector, and realizing the reconstruction and regulation of the electromagnetic scattering characteristics of the corner reflector; further, a control circuit is designed, and the angle of the corner reflector array element can be independently electrically controlled, and any change within a specific angle range can be realized according to the control signal of the control circuit. This application is convenient and fast, and can realize RCS regulation with a large dynamic range in a specific direction, thereby improving the difficulty of radar detection and identification, interfering with the strike accuracy of enemy attack weapons, and realizing the protection of important high-value targets. It is particularly suitable for passive interference countermeasure devices such as corner reflectors in the field of radar electronic countermeasures or passive scatterer arrays composed of passive interference countermeasure devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional structural diagram of a reconfigurable corner reflector in one embodiment;

[0023] Figure 2 is a diagram of the electric control of a reconfigurable corner reflector in one embodiment;

[0024] Figure 3 is an RCS simulation pattern of a reconfigurable corner reflector in different opening angle states in one embodiment;

[0025] Figure 4 Graph showing the RCS control range of a reconfigurable corner reflector in a specific direction in one embodiment.

[0026] Reference numerals:

[0027] The first board 1;

[0028] The second support plate 2;

[0029] Floor 3;

[0030] Rotating member 41 , control member 42 , control circuit 43 . DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0032] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "multiple groups" means at least two groups, such as two groups, three groups, etc., unless otherwise clearly and specifically defined.

[0034] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] In addition, the technical solutions between the various embodiments of the present application can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0036] The present application provides a reconfigurable corner reflector, such as Figure 1 and Figure 2 As shown, in one embodiment, it includes: a first support plate, a second support plate, a floor, and a reconstruction assembly.

[0037] The connection relationship between the various components is: the first support plate, the second support plate and the floor are all flat plate structures, the first support plate and the second support plate are both arranged on the floor, and the first support plate and the second support plate are rotatably connected through a reconstruction component.

[0038] The first support plate is made of metal material. The present application does not limit the shape of the first support plate. Preferably, the first support plate is made of square metal material.

[0039] The second support plate is made of metal material. The present application does not limit the shape of the second support plate. Preferably, the second support plate is made of square metal material.

[0040] The floor is made of metal material. The present application does not limit the shape of the floor. Preferably, the floor is made of rectangular metal material.

[0041] The reconstruction component includes a rotating member and a control member. The rotating member is connected to the first support plate and the second support plate, and the control member is connected to the rotating member to control the angle of the rotating member and thus control the opening angle of the corner reflector.

[0042] Preferably, one surface of the first support plate is connected to one surface of the second support plate via a rotating member, and the two surfaces connected by the rotating member are of equal length to the rotating member, that is, one end of the rotating member is fixed on the floor.

[0043] Preferably, the rotating member is vertically arranged at the midpoint of one side of the floor.

[0044] Preferably, the rotating member is a hinge, the control member is a stepping motor, and the shaft of the stepping motor passes through the floor and is connected to one end of the hinge.

[0045] Preferably, the stepper motor is connected to an external control circuit to adjust the opening angle of the dihedral angle of the corner reflector according to a control signal generated by the external control circuit. Specifically, the control circuit may be an FPGA circuit.

[0046] In the above-mentioned reconfigurable corner reflector, the first support plate and the second support plate constitute a dihedral corner reflector, and the two are connected by a reconstruction component, so that the dihedral angle of the corner reflector can be changed by the reconstruction component, thereby reconstructing the dihedral angle of the corner reflector, so that the corner reflector has a reconfigurable angle, and the reconstruction and regulation of the electromagnetic scattering characteristics of the corner reflector are realized; further, a control circuit is designed, and the angle of the corner reflector array element can be independently electrically controlled, and any change within a specific angle range can be realized according to the control signal of the control circuit. This application is convenient and fast, and can realize RCS regulation with a large dynamic range in a specific direction, thereby improving the difficulty of radar detection and identification, interfering with the strike accuracy of enemy attack weapons, and realizing the protection of important high-value targets. It is particularly suitable for passive interference countermeasures such as corner reflectors in the field of radar electronic countermeasures or passive scatterer arrays composed of passive interference countermeasures.

[0047] In a specific embodiment, the corner reflector array element includes: a first support plate, a second support plate and a floor. The first support plate and the second support plate (i.e., the two surfaces of the reflector) are both 300mm×300mm squares, forming a vertical dihedral corner reflector. The floor is a 220mm×440mm rectangle. All three are made of aluminum plates with a thickness of 3mm. The dihedral corner reflector is connected by a hinge, which is perpendicular to the metal floor and fixed at the center of the long side of the metal floor.

[0048] By using HFSS to model the above corner reflector array element and perform single-station RCS simulation calculation, we can obtain the RCS change of the azimuth plane of the corner reflector array element at different opening angles, such as Figure 3 shown.

[0049] Moreover, for a specific direction, under different control signal excitations, the RCS value of a single station can achieve a change of more than 20dB, such as Figure 4 shown.

[0050] In order to counter passive interference under the new situation, this application conducts a reconfigurable design for corner reflectors and their arrays. By designing the opening angle of the corner reflector array elements, dynamically adjusting the structural size and arrangement configuration of the corner reflector, and dynamically reconstructing and regulating the scattering characteristics of the corner reflector, the amplitude modulation of the scattering characteristics can be achieved, thereby reducing the success rate of radar detection and identification, supporting the optimization and integration of the corner reflector array arrangement, greatly improving the difficulty of radar detection and identification, and protecting the survivability of important targets such as our ships.

[0051] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A reconfigurable corner reflector, characterized in that: include: The first support plate, the second support plate and the floor are all flat plate structures; The first support plate and the second support plate are both arranged on the floor; The first support plate and the second support plate are rotatably connected via a reconstruction assembly to change the dihedral angle of the corner reflector.

2. The reconfigurable corner reflector according to claim 1, characterized in that: The reconstruction assembly includes: a rotating member; The rotating member connects the first supporting plate and the second supporting plate.

3. The reconfigurable corner reflector according to claim 2, characterized in that: The reconstruction component further includes: a control member; The control member is connected to the rotating member to control the angle of the rotating member.

4. The reconfigurable corner reflector according to claim 2 or 3, characterized in that: One surface of the first support plate is connected to one surface of the second support plate through the rotating member, and the two surfaces connected by the rotating member are both of the same length as the rotating member.

5. The reconfigurable corner reflector according to claim 4, characterized in that: The rotating member is vertically arranged at the midpoint of one side of the floor.

6. The reconfigurable corner reflector according to claim 3, characterized in that: The rotating member is a hinge.

7. The reconfigurable corner reflector according to claim 6, characterized in that: The control component is a stepping motor.

8. The reconfigurable corner reflector according to claim 7, characterized in that: The shaft of the stepper motor passes through the floor and is connected to one end of the hinge.

9. The reconfigurable corner reflector according to claim 8, characterized in that: The stepper motor is connected to an external FPGA circuit.

10. The reconfigurable corner reflector according to any one of claims 1 to 3, characterized in that: The first support plate and the second support plate are both made of square metal material.

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