Low-scattering carrier for satellite navigation antenna radar scattering characteristic research

Abstract

The utility model belongs to the technical field of low-scattering carrier appearance design, and particularly relates to a low-scattering carrier for satellite navigation antenna radar scattering characteristic research, which comprises an upper surface, a lower surface, a lateral surface and a tail end face, the sample piece mounting plane is positioned on the upper surface; a universal sample piece mounting groove is formed in the middle of the upper surface; the side end face and the tail end face are of a smooth curved surface structure and are in smooth transition with the upper surface and the lower surface without obvious edges. According to the utility model, the influence of the edge diffraction of the satellite navigation antenna radar structure on the scattering of the sample piece is effectively reduced, the problem that the RCS test of the satellite navigation antenna radar structure sample piece needs to carry out low-scattering processing is solved, and the working efficiency of the scattering characteristic test of the satellite navigation antenna radar is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to low scattering carrier appearance design technical field, specifically related to a kind of low scattering carrier for satellite navigation antenna radar scattering characteristic research. BACKGROUND

[0002] With the development of long-range defense weapon and the upgrading of radar detection technology, the combat survival of aircraft, unmanned aerial vehicle, guided ammunition and other aircrafts is seriously threatened, and stealth capability becomes one of the key performances of advanced aircraft. Carrying out radar scattering cross section test is an effective means to test aircraft stealth performance and evaluate aircraft stealth penetration efficiency. When stealth design and test evaluation are carried out on aircraft components, new strong scattering effect will be generated at the edge of the component, which greatly affects the accuracy of component test results. If the component is treated with low scattering, the size of the sample will be further increased, and the time period and sample manufacturing cost of the research will also be greatly increased. Therefore, designing a low scattering carrier for component test is the most effective method to solve the above problems, which can effectively improve the research efficiency of weak scattering source and reduce the research cost.

[0003] At present, the design of low scattering carrier mainly focuses on the carrier research of aircraft outer structural components such as wing, wing, aircraft surface skin, etc. There are relatively few low scattering carrier researches for satellite navigation antenna radar of stealth aircraft. The matching between satellite navigation antenna component and low scattering carrier is poor, and there is no universally applicable carrier structure model. UTILITY MODEL CONTENT

[0004] (I) Technical problem to be solved

[0005] The technical problem to be solved by the utility model is how to provide a low scattering carrier for satellite navigation antenna radar scattering characteristic research.

[0006] (II) Technical scheme

[0007] To solve the above technical problems, the utility model provides a low scattering carrier for satellite navigation antenna radar scattering characteristic research, which comprises: an upper surface (1), a lower surface (2), a sample mounting plane (3), a lateral end face (4) and a tail end face (5).

[0008] The upper surface (1) and the lower surface (2) are both planes, the sample mounting plane (3) is arranged on the upper surface (1), and the middle part of the sample mounting plane (3) is provided with a sample mounting groove (6).

[0009] Among them, the forward inner angle of the upper surface (1) and the lower surface (2) of the carrier ranges from 5° to 30°.

[0010] The two side edges of the upper surface (1) of the carrier have an included angle ranging from 70° to 80°.

[0011] The front-to-rear length of the carrier ranges from 800 mm to 1200 mm.

[0012] The left-to-right length of the carrier ranges from 300 mm to 500 mm.

[0013] The upper surface (1) and the lower surface (2) of the carrier are connected to the side surface through a curved arc or arc line, and no obvious connecting edge is formed.

[0014] The surface roughness Ra of the upper surface (1) of the carrier is not greater than 0.8.

[0015] The mounting groove (6) of the carrier and the mounting gap of the sample have a size ranging from 0.20 mm to 0.40 mm.

[0016] The carrier is a metal carrier.

[0017] The metal carrier is composed of an internal metal frame and an external metal skin.

[0018] (Three) beneficial effects

[0019] Compared with the prior art, the low-scattering carrier can effectively avoid the edge scattering effect of the satellite navigation antenna component, and improve the scientificity and test accuracy of the stealth test of the satellite navigation antenna component. Meanwhile, the low-scattering carrier is provided for the stealth test of the satellite navigation antenna radar of the aircraft, and solves the problems of poor matching between the satellite navigation antenna radar of the aircraft and the low-scattering carrier and lack of a universal model. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 Fig. 1 is a perspective view of the low-scattering carrier of the present application;

[0021] Figure 2 Fig. 2 is a side view of the low-scattering carrier of the present application;

[0022] Figure 3 Fig. 3 is an RCS curve diagram of the low-scattering carrier in the present application under the conditions of an x-wave band, 0° azimuth angle, (0°-60°) pitch angle and HH / VV polarization.

[0023] In the figure: 1, upper surface; 2, lower surface; 3, sample mounting plane; 4, lateral end surface; 5, tail end surface; 6, sample mounting groove. DETAILED DESCRIPTION

[0024] In order to make the purpose, content and advantages of the utility model more clear, the specific implementation of the utility model is described in further detail below in combination with the drawings and examples.

[0025] To solve the above technical problems, the utility model provides a kind of low scattering carrier for satellite navigation antenna radar scattering characteristic research, the carrier includes: upper surface (1), lower surface (2), sample piece installation plane (3), lateral end face (4), tail end face (5);

[0026] The upper surface (1) and the lower surface (2) are both plane, the sample piece installation plane (3) is arranged on the upper surface (1), and the middle part of the sample piece installation plane (3) is provided with sample piece installation groove (6).

[0027] Wherein, the forward inner angle angle range of the upper surface (1) and the lower surface (2) of the carrier is 5 ° ~ 30 °.

[0028] Wherein, the two side edges of the upper surface (1) of the carrier are included in the range of 70 ° ~ 80 °.

[0029] Wherein, the front and rear length range of the carrier is 800mm ~ 1200mm.

[0030] Wherein, the left and right length range of the carrier is 300mm ~ 500mm.

[0031] Wherein, the upper surface (1) and the lower surface (2) of the carrier and the side surface are realized round transition by curved arc or arc, and there is no obvious connecting edge.

[0032] Wherein, the surface roughness Ra of the upper surface (1) of the carrier is not more than 0.8.

[0033] Wherein, the installation gap of the installation groove (6) of the carrier and the sample piece is 0.20mm ~ 0.40mm.

[0034] Wherein, the carrier is metal carrier.

[0035] Wherein, the metal carrier is composed of internal metal frame and outer metal skin.

[0036] Example 1

[0037] The utility model provides a kind of low scattering carrier for satellite navigation antenna radar scattering characteristic research, including upper surface, lower surface, sample piece installation plane, lateral end face, tail end face.

[0038] As Figure 1As shown, the upper surface and the lower surface of the low-scattering carrier are both planes, and the shape is like a water drop; the outer side of the low-scattering carrier is a round arc connected with the upper and lower surfaces, the thickness of the carrier gradually increases from the front to the tip to the arc tail end, and the whole presents a symmetrical "sharp cone" shape. On the one hand, the periphery and the tail of the carrier are in a round transition state through the curved arc or arc, without obvious connecting edges, avoiding the diffraction of edges and the scattering of surface waves; on the other hand, this symmetrical structure can well inhibit the influence of the traveling wave effect on the backscattering. Through this shape design, the scattering effect of the carrier is effectively reduced.

[0039] In the utility model, the included angle range of the two side edges of the upper surface of the carrier is 70°-80°, which is favorable for transferring the scattering of the carrier head in the range of ±45°, reduces the RCS of the carrier head, and the obtained carrier shape can significantly weaken the backscattering caused by the traveling wave current.

[0040] In the utility model, the length range of the front and back of the carrier is 800mm-1200mm, and the length range of the left and right of the carrier is 300mm-500mm, so as to meet the demand of stealth performance test and evaluation of the satellite navigation antenna radar of the stealth aircraft.

[0041] The forward inner angle of the upper and lower planes of the carrier ranges from 5° to 30°, which can meet the test demand of the satellite navigation antenna radar under the pitch angle of (0°-60°).

[0042] In the utility model, the upper surface of the carrier is a smooth curved surface, and the surface roughness Ra is not greater than 0.8; the sample mounting plane is arranged on the upper surface, the sample mounting groove is arranged in the middle of the sample mounting plane, and is used for mounting the sample; the sample mounting groove is square, and the mounting gap between the sample mounting groove and the sample is 0.20mm-0.40mm.

[0043] During the test, the radar sample is placed in the sample mounting groove, when the vertical polarization electromagnetic wave is forwardly incident, the carrier structure can effectively convert the strong specular scattering into weak sharp point scattering; when the horizontal polarization electromagnetic wave is backwardly incident, the carrier structure can greatly reduce the traveling wave scattering caused by the edge mutation. Through electromagnetic simulation calculation and stealth test evaluation, the RCS data close to the installation state of the satellite navigation antenna component can be obtained. When different orders of magnitude and forms of scattering sources are studied, only different samples need to be replaced.

[0044] The above is only the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled persons in the technical field, some improvements and deformations can be made without departing from the technical principles of the utility model, and these improvements and deformations should also be regarded as the protection range of the utility model.

Claims

1. A low-scattering carrier for satellite navigation antenna radar scattering feature studies, characterized in that, The carrier comprises: an upper surface (1), a lower surface (2), a sample mounting plane (3), a lateral end surface (4), and a tail end surface (5). The upper surface (1) and the lower surface (2) are both planes, the sample mounting plane (3) is arranged on the upper surface (1), and a sample mounting groove (6) is arranged in the middle of the sample mounting plane (3).

2. The low-scattering carrier for satellite navigation antenna radar scattering feature study of claim 1, wherein, The forward inner angle of the upper surface (1) and the lower surface (2) of the carrier ranges from 5° to 30°.

3. The low-scattering carrier for satellite navigation antenna radar scattering feature study of claim 1, wherein, The included angle of the two side edges of the upper surface (1) of the carrier ranges from 70° to 80°.

4. The low-scattering carrier for satellite navigation antenna radar scattering feature study of claim 1, wherein, The length of the carrier ranges from 800 mm to 1200 mm.

5. The low-scattering carrier for satellite navigation antenna radar scattering feature study of claim 1, wherein, The length of the carrier ranges from 300 mm to 500 mm.

6. The low-scattering carrier for satellite navigation antenna radar scattering feature study of claim 1, wherein, The upper surface (1) and the lower surface (2) of the carrier are connected to the side surface through a curved arc or arc line to achieve a smooth transition, and there is no obvious connecting edge.

7. The low-scattering carrier for satellite navigation antenna radar scattering feature study of claim 1, wherein, The surface roughness Ra of the upper surface (1) of the carrier is not greater than 0.

8.

8. The low-scattering carrier for satellite navigation antenna radar scattering feature study of claim 1, wherein, The mounting groove (6) of the carrier and the mounting gap of the sample are 0.20 mm to 0.40 mm.

9. The low-scattering carrier for satellite navigation antenna radar scattering feature study of claim 1, wherein, The carrier is a metal carrier.

10. The low-scattering carrier for satellite navigation antenna radar scattering feature study of claim 9, characterized in that, The metal carrier is composed of an internal metal frame and an outer metal skin.

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