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V-shaped radar radome structure and preparation method thereof

A technology of radar radome and radome, which is applied in the field of radome, can solve the problems of not meeting the electrical performance requirements of the "V" structure radome, the distortion of the antenna pattern, and the deterioration of the overall electrical performance. Multi-layer reflection interference, increase the amplitude contrast value, and weaken the effect of interference effect

Inactive Publication Date: 2018-05-29
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The radome is a functional structural part, which not only needs to meet the requirements of structural strength, aerodynamics, and environmental resistance, but also meets the requirements of electrical performance. Higher requirements have been put forward in terms of wave and broadband. At present, the main wall structures of radome include: A sandwich structure, B sandwich structure or C sandwich structure, etc. The sandwich structure has better strength retention and wave transmission performance. Among them, the A sandwich structure is usually a three-layer structure composed of two skins and a sandwich, and the C sandwich structure is usually a five-layer structure composed of two outer skins, a central skin and two middle interlayers. The shape of the radome is mostly a smooth transitional shape, and there is no sudden change in shape. The above-mentioned structure can meet the conventional use through the electrical performance design. For the "V" structure radome, due to its special shape, the above-mentioned conventional electrical The structural wall thickness design method is likely to cause interference of electromagnetic waves in the direction of propagation, resulting in distortion of the antenna pattern, a sharp decrease in the wave transmittance in individual frequency bands, and deterioration of the overall electrical performance, which cannot meet the electrical performance of the "V"-shaped structure radome and the radar antenna. Work requirements

Method used

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  • V-shaped radar radome structure and preparation method thereof

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Effect test

Embodiment 1

[0027] 1) Paste the quartz fiber reinforced cyanate-based prepreg on the female mold of the radome, wherein the thickness of the quartz fiber is 0.14mm, and the number of layers is 6, and then hot-pressed and cured, the curing system : 80°C / 1h, 160°C / 1h, 180°C / 2h, 200°C / 2h, 230°C / 2h, hold at 180°C for 30 minutes and pressurize at 0.3MPa to obtain a skin with a thickness of 1mm;

[0028] 2) Bonding a cyanate-based adhesive film in the skin, filling the PMI foam into the female mold to obtain the radome structure;

[0029] 3) bonding the cyanate film at the bottom of the above-mentioned PMI foam, and installing an antenna, so that the antenna and the PMI foam are bonded by the cyanate film;

[0030] 4) Vacuum co-curing is carried out on the structure obtained in step 3), and the curing system is 180°C / 3h, and the product is obtained.

[0031] The obtained "V" type radome structure is as follows figure 1 As shown, the average wave transmission rate in the X and K frequency band...

Embodiment 2

[0033] 1) Paste the quartz fiber reinforced cyanate-based prepreg on the female mold of the radome, wherein the thickness of the quartz fiber is 0.14mm, and the number of paved layers is 9 layers, and then hot-pressed and cured, the curing system : 80°C / 1h, 160°C / 1h, 180°C / 2h, 200°C / 2h, 230°C / 2h, hold at 180°C for 30 minutes and pressurize at 0.3MPa to obtain a skin with a thickness of 1.5mm;

[0034] 2) Bonding a cyanate-based adhesive film in the skin, filling the PMI foam into the female mold to obtain the radome structure;

[0035] 3) bonding the cyanate film at the bottom of the above-mentioned PMI foam, and installing an antenna, so that the antenna and the PMI foam are bonded by the cyanate film;

[0036] 4) Vacuum co-curing is carried out on the structure obtained in step 3), and the curing system is 180°C / 3h, and the product is obtained.

[0037] The obtained "V" type radome structure is as follows figure 1 As shown, the average wave transmission rate in the X and K...

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Abstract

The invention provides a "V"-shaped radar radome structure and a preparation method thereof. The radome structure is obtained by co-curing of an antenna, a skin and a filling core layer, the skin andthe filling core layer are adhered by using an adhesive layer so as to form the radome, and the antenna and the filling core layer are adhered by using the adhesive layer and wrapped in the radome. The influence of multilayer reflection interference of the conventional interlayer radome surface can be weakened by the integral design of the radome and the antenna. Besides, compared with the multilayer skin core layer structure, only one skin is required, the wave permeability can be enhanced by the ultrathin skin design and the error of aiming can be greatly reduced. Meanwhile, the antenna pattern and phase consistency can be enhanced, and the problems of reduction of the wave permeability and pattern distortion under the broadband condition of the "V"-shaped radome can be solved, and the wave permeability, the pattern and the phase consistency of the "V"-shaped radome are enabled to meet the working requirements of the radar antenna.

Description

technical field [0001] The invention belongs to the technical field of radome, and in particular relates to a "V"-shaped radome structure and a preparation method. Background technique [0002] The radome is a functional structural part, which not only needs to meet the requirements of structural strength, aerodynamics, and environmental resistance, but also meets the requirements of electrical performance. At present, the main wall structures of radome include: A sandwich structure, B sandwich structure or C sandwich structure, etc. The sandwich structure has better strength retention and wave transmission performance. Among them, the A sandwich structure is usually a three-layer structure composed of two skins and a sandwich, and the C sandwich structure is usually a five-layer structure composed of two outer skins, a central skin and two middle interlayers. The shape of the radome is mostly smooth and transitional, and there is no sudden change in shape. The above-mentio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/42
CPCH01Q1/42
Inventor 孟庆杰徐亮杨洁颖
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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