Waveguide array antenna array surface for reducing side lobe level of array surface and assembly method of waveguide array antenna array surface

Abstract

The invention discloses a waveguide array antenna array surface for reducing array surface sidelobe level and an assembling method thereof. The waveguide array antenna array surface comprises a mounting bottom plate and a plurality of waveguide antenna units, the multiple waveguide antenna units are arranged on the mounting bottom plate in an array mode, the number of the waveguide antenna units in each row is equal, odd-numbered rows are aligned with odd-numbered rows, even-numbered rows are aligned with even-numbered rows, the even-numbered rows and the odd-numbered rows are arranged in a staggered mode, and a preset gap is reserved between any two adjacent waveguide antenna units. The preset gap is smaller than half of a reflecting plate of the waveguide antenna unit; a flexible conductive piece is connected between the reflecting plate of each waveguide antenna unit and the reflecting plate of the next adjacent waveguide antenna unit in the same row; and a flexible conductive piece is connected between the reflecting plate of each waveguide antenna unit and the reflecting plate of the corresponding waveguide antenna unit in the next adjacent row. According to the invention, the problems that the sidelobe level is increased and the receiving sensitivity is reduced due to the array plane block design are solved, and the efficiency of the radar is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of waveguide array antenna array surface, and in particular to a waveguide array antenna array surface for reducing the array surface side lobe level and an assembly method thereof. Background Art

[0002] In the field of radar, in order to balance the manufacturability and assembly requirements, the array of large array waveguide antennas is usually divided into several antenna units, and the antenna units are discontinuous and have large or small gaps. However, this gap has a certain degree of influence on the sidelobe level of the measured radar, and the gaps and discontinuities between the antenna units caused by the block design of the array are narrow in actuality, usually less than 0.5mm, and there is no installation space, making it difficult to fill. Summary of the invention

[0003] In order to solve the technical problems existing in the background technology, the present invention proposes a waveguide array antenna array surface and an assembly method thereof for reducing the array surface sidelobe level.

[0004] The present invention provides a waveguide array antenna array for reducing the array sidelobe level, comprising: a mounting base plate and a plurality of waveguide antenna units;

[0005] A plurality of waveguide antenna unit arrays are arranged on the mounting base plate, the number of waveguide antenna units in each row is equal, odd-numbered rows are aligned with odd-numbered rows, even-numbered rows are aligned with even-numbered rows, even-numbered rows are staggered with odd-numbered rows, and a preset gap is reserved between any two adjacent waveguide antenna units, and the preset gap is less than half of the reflector of the waveguide antenna unit;

[0006] Among them, a flexible conductive part is connected between the reflective plate of each waveguide antenna unit and the reflective plate of the next adjacent waveguide antenna unit in the same row; and a flexible conductive part is connected between the reflective plate of each waveguide antenna unit and the reflective plate of the corresponding waveguide antenna unit in the next adjacent row.

[0007] Preferably, the thickness of the flexible conductive member is greater than the preset gap.

[0008] Preferably, the compression ratio of the flexible conductive member is 1:10.

[0009] Preferably, each flexible conductive member is fixed to the waveguide antenna unit of the last adjacent row or the last adjacent column among the plurality of connected waveguide antenna units by means of conductive glue.

[0010] Preferably, the conductive adhesive is a silver-based conductive adhesive that cures at room temperature.

[0011] The present invention also proposes an assembly method for a waveguide array antenna array surface for reducing the array surface sidelobe level, which is applied to any of the above-mentioned waveguide array antenna array surfaces for reducing the array surface sidelobe level, comprising:

[0012] A flexible conductive member is respectively attached to the first side wall in the row direction and the second side wall in the column direction of the reflector of each waveguide antenna unit through conductive adhesive, and the conductive adhesive is cured at room temperature;

[0013] Arrange the solidified multiple waveguide antenna unit arrays on the mounting base plate so that the number of waveguide antenna units in each row is equal, the odd rows are aligned with the odd rows, the even rows are aligned with the even rows, the even rows are staggered with the odd rows, and a preset gap is reserved between any two adjacent waveguide antenna units, the preset gap is less than half of the reflector of the waveguide antenna unit, and the reflector of each waveguide antenna unit is connected to the reflector of the next adjacent waveguide antenna unit in the same row through a flexible conductive member, and the reflector of each waveguide antenna unit is connected to the reflector of the corresponding waveguide antenna unit in the next adjacent row through a flexible conductive member.

[0014] In the present invention, the proposed waveguide array antenna array for reducing the array sidelobe level and the assembly method thereof solve the problems of increased sidelobe level and reduced receiving sensitivity caused by the array block design by connecting the flexible conductive part to the gap between adjacent antenna units, which can improve the efficiency of the radar, avoid sparking between units under high power, and shield the leakage of front-end microwaves; moreover, the flexible conductive part can be compressed and deformed, can fill the gap between the waveguide antenna units, and can keep the gap filled with conductive material all the time in a vehicle-mounted or vibration environment, and has the characteristics of flexible structure and good shock resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a waveguide array antenna array for reducing the array sidelobe level in an embodiment of the present invention.

[0016] Figure 2 It is a schematic structural diagram of a waveguide antenna unit in an embodiment of the present invention.

[0017] Figure 3 This is a schematic structural diagram of a waveguide antenna unit equipped with a flexible conductive member in an embodiment of the present invention.

[0018] Figure 4 A schematic diagram of the assembly of a waveguide array antenna array for reducing the array sidelobe level in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0020] Reference Figure 1 , a waveguide array antenna array for reducing the array sidelobe level proposed by the present invention comprises: a mounting base plate 1 and a plurality of waveguide antenna units 2;

[0021] A plurality of waveguide antenna units 2 are arranged in an array on a mounting base plate 1, the number of waveguide antenna units 2 in each row is equal, odd rows are aligned with odd rows, even rows are aligned with even rows, even rows are staggered with odd rows, and a preset gap is reserved between any two adjacent waveguide antenna units 2, and the preset gap is less than half of the reflector of the waveguide antenna unit 2;

[0022] Among them, a flexible conductive part 3 is connected between the reflection plate of each waveguide antenna unit 2 and the reflection plate of the next adjacent waveguide antenna unit 2 in the same row; and a flexible conductive part 3 is connected between the reflection plate of each waveguide antenna unit 2 and the reflection plate of the corresponding waveguide antenna unit 2 in the next adjacent row.

[0023] What you need to know is that Figure 1 As shown, when a waveguide antenna unit 2 is located at the starting end of an odd row or the ending end of an even row, the waveguide antenna unit 2 corresponds to a waveguide antenna unit 2 at the starting end of the next even row (i.e., an adjacent row) or a waveguide antenna unit 2 at the ending end of the next odd row (i.e., an adjacent row); when a waveguide antenna unit 2 is located at a position other than the ending end of an even row and at a position other than the starting end of an odd row, the waveguide antenna unit 2 corresponds to two waveguide antenna units 2 in the next adjacent row.

[0024] The present invention solves the problems of increased sidelobe level and reduced receiving sensitivity caused by the array block design by connecting the flexible conductive part 3 to the gap between adjacent antenna units, thereby improving the efficiency of the radar, avoiding sparks between units under high power, and shielding the leakage of front-end microwaves. Moreover, the flexible conductive part 3 can be compressed and deformed to fill the gap between the waveguide antenna units 2, and can keep the gap filled with conductive material all the time in a vehicle-mounted or vibration environment, and has the characteristics of flexible structure and good shock resistance.

[0025] Of course, the side walls of the reflective plate in the row and column directions are all flat, which is convenient for gluing with the flexible conductive member 3 .

[0026] In order to facilitate the installation of the flexible conductive member 3 , the flexible conductive member 3 is generally in a strip shape, and the cross section is rectangular, circular or elliptical.

[0027] In this embodiment, in the absence of external force, the thickness of the flexible conductive member 3 is greater than the preset gap to ensure that the gap between the waveguide antenna units 2 can be filled.

[0028] In a further embodiment, the thickness of the flexible conductive member 3 is 2-5 times of the preset gap.

[0029] It should be noted that the compression ratio of the flexible conductive member 3 in this embodiment is 1:10 to better fill the gap.

[0030] In one specific embodiment, the preset gap is 0.4 mm, the thickness of the flexible conductive member 3 is 1 mm, and the compression ratio is 1:10.

[0031] In this embodiment, each flexible conductive member 3 is fixed to the waveguide antenna unit 2 in the last adjacent row or last adjacent column among the multiple waveguide antenna units 2 connected thereto by means of conductive glue.

[0032] Specifically, the conductive adhesive is a silver-based conductive adhesive that cures at room temperature to facilitate assembly.

[0033] Among them, the model of silver-based conductive adhesive is H20E or 584-29.

[0034] In this embodiment, a bolt mechanism is connected between the waveguide antenna unit 2 and the mounting base plate 1 .

[0035] Specifically, a positioning pin is connected between the waveguide antenna unit 2 and the mounting base plate 1 .

[0036] Reference Figure 2-4 The present invention also proposes an assembly method for a waveguide array antenna array surface for reducing the array surface sidelobe level, which is applied to any of the above-mentioned waveguide array antenna array surfaces for reducing the array surface sidelobe level, comprising:

[0037] The first side wall in the row direction and the second side wall in the column direction of the reflector of each waveguide antenna unit 2 are respectively attached to the flexible conductive member 3 by means of conductive adhesive, and the conductive adhesive is cured at room temperature;

[0038] Arrange the multiple solidified waveguide antenna units 2 in an array on the mounting base plate 1, so that the number of waveguide antenna units 2 in each row is equal, the odd rows are aligned with the odd rows, the even rows are aligned with the even rows, the even rows are staggered with the odd rows, and a preset gap is reserved between any two adjacent waveguide antenna units 2, the preset gap is less than half of the reflector of the waveguide antenna unit 2, and the reflector of each waveguide antenna unit 2 is connected to the reflector of the next adjacent waveguide antenna unit 2 in the same row through a flexible conductive member 3, and the reflector of each waveguide antenna unit 2 is connected to the reflector of the corresponding waveguide antenna unit 2 in the next adjacent row through a flexible conductive member 3.

[0039] The present invention can splice the waveguide antenna units 2 according to the size of the array surface through this assembly method to form a large array, and by connecting the flexible conductive member 3 to the gap between adjacent antenna units, the problem of increased sidelobe level and reduced receiving sensitivity caused by the block design of the array surface is solved, the efficiency of the radar can be improved, sparks between units under high power can be avoided, and the leakage of front-end microwaves can be shielded; moreover, the flexible conductive member 3 can be compressed and deformed, can fill the gap between the waveguide antenna units 2, and can keep the gap filled with conductive material all the time in a vehicle-mounted or vibration environment, and has the characteristics of flexible structure and good shock resistance.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A waveguide array antenna array for reducing the array sidelobe level, characterized in that: include: Installing a base plate (1) and a plurality of waveguide antenna units (2); A plurality of waveguide antenna units (2) are arranged in an array on a mounting base plate (1), the number of waveguide antenna units (2) in each row is equal, odd rows are aligned with odd rows, even rows are aligned with even rows, even rows are arranged alternately with odd rows, and a preset gap is reserved between any two adjacent waveguide antenna units (2), the preset gap being smaller than half of a reflector of the waveguide antenna unit (2); A flexible conductive member (3) is connected between the reflector plate of each waveguide antenna unit (2) and the reflector plate of the next adjacent waveguide antenna unit (2) in the same row; and a flexible conductive member (3) is connected between the reflector plate of each waveguide antenna unit (2) and the reflector plate of the corresponding waveguide antenna unit (2) in the next adjacent row.

2. The waveguide array antenna array for reducing the array sidelobe level according to claim 1, characterized in that: The thickness of the flexible conductive element (3) is greater than the preset gap.

3. The waveguide array antenna array for reducing the array sidelobe level according to claim 1, characterized in that: The compression ratio of the flexible conductive element (3) is 1:

10.

4. The waveguide array antenna array for reducing the array sidelobe level according to claim 1, characterized in that: Each flexible conductive member (3) is fixed to the waveguide antenna unit (2) in the last adjacent row or last adjacent column among the plurality of connected waveguide antenna units (2) by means of conductive glue.

5. The waveguide array antenna array for reducing the array sidelobe level according to claim 4, characterized in that: The conductive adhesive is a silver-based conductive adhesive that cures at room temperature.

6. A method for assembling a waveguide array antenna array for reducing the array sidelobe level, applied to the waveguide array antenna array for reducing the array sidelobe level according to any one of claims 1 to 5, characterized in that: include: A flexible conductive member (3) is respectively attached to the first side wall in the row direction and the second side wall in the column direction of the reflector of each waveguide antenna unit (2) by means of conductive adhesive, and the conductive adhesive is cured at room temperature; Arrange the array of multiple solidified waveguide antenna units (2) on a mounting base plate (1) such that the number of waveguide antenna units (2) in each row is equal, odd rows are aligned with odd rows, even rows are aligned with even rows, even rows are staggered with odd rows, and a preset gap is reserved between any two adjacent waveguide antenna units (2), the preset gap is smaller than half of the reflector of the waveguide antenna unit (2), and the reflector of each waveguide antenna unit (2) is connected to the reflector of the next adjacent waveguide antenna unit (2) in the same row via a flexible conductive member (3), and the reflector of each waveguide antenna unit (2) is connected to the reflector of the corresponding waveguide antenna unit (2) in the next adjacent row via a flexible conductive member (3).

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