Magnetoelectric dipole antenna and radar antenna array

Abstract

The invention discloses a magnetoelectric dipole antenna and a radar antenna array in the technical field of radar electronic engineering, and the magnetoelectric dipole antenna comprises an electric dipole which comprises a hollow carrier and at least two circular rings disposed on the side surface of the upper part of the hollow carrier; the magnetic dipole is arranged in the hollow carrier and is connected with the circular ring; the radio frequency connector is connected with the magnetic dipole; and the mounting base is connected with the hollow carrier and is provided with a fixing hole connected with external equipment. The antenna provided by the invention has the advantages of simple structure, small size and light weight, and in addition, the antenna also has relatively wide bandwidth, relatively low backward radiation and a stable radiation pattern. The magnetoelectric dipole antennas in the radar antenna array have the advantages of mutual independence and high installation precision in structure, and the antennas are greatly convenient to assemble, disassemble, maintain and replace.

Description

Technical Field

[0001] The present invention relates to a magnetoelectric dipole antenna and a radar antenna array, belonging to the technical field of radar electronic engineering. Background Art

[0002] As a core component of modern radar systems, it is crucial for an antenna to have excellent characteristics. With the booming development of antenna communication, the requirements for the performance of various antennas are constantly increasing. With the development of radar technology, the demand for smaller and lighter radars is getting higher and higher.

[0003] Although the traditional microstrip dipole antenna has the advantages of a low-profile structure, easy commonality with carriers, and the ability to emit electromagnetic waves unidirectionally or omnidirectionally, it often occupies a large space in structure and poses a huge challenge to radar design. In addition, such antennas also have high cross-polarization, high backward radiation, and unstable beam width and gain, so they have not been widely used. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a magnetoelectric dipole antenna and a radar antenna array.

[0005] To solve the above technical problems, the present invention is implemented by the following technical solutions.

[0006] In a first aspect, the present invention discloses a magnetoelectric dipole antenna, comprising: An electric dipole, which includes a hollow carrier and at least two rings arranged on the upper side surface of the hollow carrier; A magnetic dipole, which is arranged in the hollow carrier and connected to the ring; A radio frequency connector, which is connected to the magnetic dipole; An installation base, which is connected to the hollow carrier and is provided with fixing holes for connecting to external devices.

[0007] In the above technical solution, there are only four components with a simple structure, and the magnetic dipole is integrated inside the hollow carrier. In addition, the radio frequency connector, the hollow carrier, and the magnetic dipole are arranged vertically, and then the electric dipole is arranged as a ring, which can save the plane space of the antenna, so it has the advantage of small size; the electric dipole is in a ring structure, so it has the advantage of light weight. In addition, the electric dipole of this antenna is a ring and can be approximately regarded as a plane, with a large area in the radiation direction, so it has a wider bandwidth, lower backward radiation, and a stable radiation pattern.

[0008] Further, the main body parts of the ring and the magnetic dipole are made of brass and are gold-plated on the surface of the main body parts.

[0009] The above technical solution can effectively enhance its three-proof (salt spray resistance, moisture resistance, and mildew resistance) characteristics.

[0010] Further, the hollow carrier is a hollow cylinder, and the magnetic dipole is a hollow cylindrical structure that can be inserted into the hollow cylinder.

[0011] The above technical solution has the advantages that the cylindrical structure is convenient to manufacture, beautiful in appearance, easy to install, and the design of the hollow structure can further reduce the weight of the antenna.

[0012] Further, the ring is welded to the magnetic dipole. The included angle between the normal line of the plane of the ring and the cylindrical center line of the magnetic dipole is 0 - 90 degrees. The ring of the electric dipole is connected to the magnetic dipole by welding, which has the advantages of high strength and greater reliability compared with the commonly used screw connection or bonding. The above technical solution realizes the multi-configuration application of the antenna in terms of structure by changing the included angle between the normal line of the plane where the annular structure on the electric dipole is located and the cylindrical center line of the magnetic dipole, achieving the purpose of reducing the spacing between antenna array elements, thereby reducing the spatial size of the entire antenna array and effectively solving the prominent problem of limited space in the design of radar antennas.

[0013] Further, the mounting base is a mounting flange.

[0014] Further, the polarization direction of the antenna is changed by changing the direction of the mounting flange.

[0015] The above technical solution realizes the change of the polarization direction by changing the direction of the mounting flange, and has a richer applicable scenario.

[0016] Further, there are two rings, symmetrically arranged on both sides of the upper part of the hollow cylinder. The hollow cylinder is fixed at the through hole in the center of the mounting base, and the magnetic dipole is fixed in the hollow cylinder. The RF connector passes through the through hole and is connected to the magnetic dipole.

[0017] In a second aspect, the present invention also discloses a radar antenna array, including an antenna backplane assembly and a plurality of magnetoelectric dipole antennas as described in the first aspect. The antenna backplane assembly is provided with a plurality of blind jacks, and connection holes matching the fixing holes of the mounting base are arranged in a circle around the blind jacks. The RF connector is inserted into the blind jack for RF connection, and the magnetoelectric dipole antenna is fixed on the antenna backplane assembly by connecting the fixing holes and the connection holes with fasteners.

[0018] In the above technical solution, each magnetoelectric dipole antenna is installed on the antenna integrated backplane assembly. The magnetoelectric dipole antenna is butt-connected to the antenna backplane assembly by blind insertion and fastened by fasteners. Each magnetoelectric dipole antenna has the advantages of being structurally independent and having high installation accuracy, which greatly facilitates the installation, disassembly, maintenance and replacement of the antenna.

[0019] The beneficial effects achieved by the present invention: In the first aspect, there are only four components with a simple structure. The magnetic dipole is integrated inside the hollow carrier, and the RF connector, the hollow carrier and the magnetic dipole are arranged vertically. Then, the electric dipole is arranged as a ring, which can save the antenna plane space. Therefore, it has the advantages of small size and light weight. In addition, the antenna also has a relatively wide bandwidth, low backward radiation and a stable radiation pattern.

[0020] In the second aspect, each magnetoelectric dipole antenna is installed on the antenna integrated backplane assembly. The magnetoelectric dipole antenna is butt-connected to the antenna backplane assembly by blind insertion and fastened by fasteners. Each magnetoelectric dipole antenna has the advantages of being structurally independent and having high installation accuracy, which greatly facilitates the installation, disassembly, maintenance and replacement of the antenna. Description of the Drawings

[0021] Figure 1 is a three-dimensional structure diagram of the magnetoelectric dipole antenna; Figure 2 is a cross-sectional view of the magnetoelectric dipole antenna; Figure 3 is a schematic structural diagram of the radar antenna array.

[0022] In the figure: 1. Electric dipole, 11. Ring, 12. Hollow cylinder; 2. Magnetic dipole; 3. Mounting flange; 4. RF connector; 5. Magnetoelectric dipole antenna; 6. Antenna backplane assembly. Detailed Embodiments

[0023] The present invention will be further described below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and should not be used to limit the protection scope of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying 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", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0026] Embodiment 1, this embodiment introduces a magnetoelectric dipole antenna, such as Figure 1 and Figure 2 As shown, it includes: an electric dipole 1, a magnetic dipole 2, a mounting flange 3 and a radio frequency connector 4; The magnetoelectric dipole antenna is made of brass and gold-plated on the surface, which effectively enhances its three-proof characteristics. The electric dipole 1 is composed of a hollow cylinder 12 and two rings 11, the magnetic dipole 2 is a cylindrical structure, and the mounting flange 3 is a rectangular structure, and the four countersunk holes on it can be used for the installation of the magnetoelectric dipole antenna.

[0027] The antenna has a simple structure, small size, light weight and high strength. In addition, the antenna has a wide bandwidth, low backward radiation and a stable radiation pattern. The polarization direction can be achieved by changing the direction of the mounting flange (in this embodiment, the flange is a square structure, and its mounting method can be rotated 90 degrees. Therefore, when the antenna is installed in a horizontal polarization state, it rotates 90 degrees to a vertical polarization state), and has electromagnetic performance advantages such as stable performance. It is particularly pointed out that when the ring in this embodiment is welded, the angle (0-90 degrees) between the normal of the plane where the ring structure on the electric dipole is located and the cylindrical center line of the magnetic dipole can be changed according to specific needs to realize the multi-configuration application of the antenna in the structure, so as to achieve the purpose of reducing the spacing between the antenna array units, thereby reducing the spatial size of the entire antenna array, and effectively solving the prominent problem of space limitation in the design process of radar antennas.

[0028] Embodiment 2, this embodiment introduces a radar antenna array, such as Figure 3 As shown, the radar antenna array is composed of 81 antenna units, each of which is a magnetoelectric dipole antenna 5, mounted on the antenna backplane assembly 6. The antenna unit and the antenna backplane assembly 6 are blindly plugged and fastened through four countersunk screw holes on the mounting flange. Each antenna unit has the advantages of being independent of each other and having high installation accuracy, which greatly facilitates the assembly, disassembly, maintenance and replacement of the antenna.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A magnetoelectric dipole antenna, characterized in that, Comprising: An electric dipole, which includes a hollow carrier and at least two circular rings arranged on the upper side surface of the hollow carrier; A magnetic dipole, which is arranged in the hollow carrier and is connected to the circular rings; A radio frequency connector, which is connected to the magnetic dipole; A mounting base, which is connected to the hollow carrier and is provided with fixing holes for connecting to external devices.

2. The magnetoelectric dipole antenna according to claim 1, characterized in that The main body parts of the circular rings and the magnetic dipole are made of brass and are gold-plated on the surface of the main body parts.

3. The magnetoelectric dipole antenna according to claim 1, characterized in that, The hollow carrier is a hollow cylinder, and the magnetic dipole is a hollow cylindrical structure that can be inserted into the hollow cylinder.

4. The magnetoelectric dipole antenna according to claim 3, characterized in that, The circular rings are welded to the magnetic dipole, and the included angle between the normal line of the plane of the circular rings and the cylindrical center line of the magnetic dipole is 0 - 90 degrees.

5. The magnetoelectric dipole antenna according to claim 1, wherein The mounting base is a mounting flange.

6. The magnetoelectric dipole antenna according to claim 5, wherein, The polarization direction of the antenna is changed by changing the direction of the mounting flange.

7. The magnetoelectric dipole antenna according to claim 3, wherein There are two circular rings, symmetrically arranged on both sides of the upper part of the hollow cylinder. The hollow cylinder is fixed at the through hole in the center of the mounting base, the magnetic dipole is fixed in the hollow cylinder, and the radio frequency connector passes through the through hole and is connected to the magnetic dipole.

8. A radar antenna array, characterized in that, Comprising an antenna backplane assembly and a plurality of magnetoelectric dipole antennas as described in any one of claims 1 - 6; The antenna backplane assembly is provided with a plurality of blind sockets, and connection holes matching the fixing holes of the mounting base are arranged in a circle around the blind sockets; The radio frequency connector is inserted into the blind sockets for radio frequency connection, and the magnetoelectric dipole antenna is fixed on the antenna backplane assembly by connecting the fixing holes and the connection holes with fasteners.

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