CN215986270U - Wave-absorbing material performance parameter testing device - Google Patents
Wave-absorbing material performance parameter testing device Download PDFInfo
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- CN215986270U CN215986270U CN202122114882.2U CN202122114882U CN215986270U CN 215986270 U CN215986270 U CN 215986270U CN 202122114882 U CN202122114882 U CN 202122114882U CN 215986270 U CN215986270 U CN 215986270U
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Abstract
The utility model relates to a device for testing performance parameters of a wave-absorbing material, which comprises: a non-metallic sleeve and a test radar; one end of the non-metal sleeve is opened; the test radar is arranged in the cylinder body of the non-metal sleeve, or is arranged at the other end, opposite to the opening, of the non-metal sleeve. According to the utility model, the test radar is arranged in the non-metal sleeve or at one end of the non-metal sleeve, so that the irradiation area of the test radar is limited to be corresponding to the wave-absorbing material to be tested, other interference areas are eliminated, and the accuracy of the test result is further enhanced.
Description
Technical Field
The utility model relates to the technical field of wave-absorbing material testing, in particular to a wave-absorbing material performance parameter testing device.
Background
In the field such as antenna test, the wave-absorbing material is widely used, and the performance parameters of the wave-absorbing material have important influence on the antenna test result.
When a test environment is built, a wave-absorbing material needs to be purchased, but the performance parameters of the wave-absorbing material purchased in the market, which are nominal, often cause problems when the wave-absorbing material is applied to actual tests, because the performance parameters of the wave-absorbing material are matched with the test mode for obtaining the corresponding performance parameters. Therefore, if the nominal performance parameters of the wave-absorbing material in the sale state are different from the mode of the wave-absorbing material in the use state after the wave-absorbing material is purchased, that is, the test mode on which the measured parameters of the wave-absorbing material depend is different from the incident mode of the electromagnetic waves in the actual application scene, the performance parameters reflected in the actual use process of the wave-absorbing material may not be the same as the performance parameters determined in the purchase process of the wave-absorbing material. In fact, the probability of this situation occurring is really high. The following examples are given.
At present, there are two testing methods for measuring parameters provided by wave-absorbing material manufacturers:
firstly, referring to fig. 1, the test method is applied to test the low-frequency wave-absorbing material 3. The test apparatus comprises an antenna 1 and an antenna 2 and a network analyzer 4. When testing the performance parameters of the low-frequency wave-absorbing material 3, the electromagnetic wave is incident at a certain angle a and then reflected at a certain angle b, wherein the angle a is equal to the angle b.
However, in practical applications, it is generally considered that the low-frequency wave-absorbing material 3 has an energy value of an actual incident angle of the electromagnetic wave and reflected at an angle, which is not equal to a or b, in a use state, which is similar to a standing wave ratio parameter in a radio frequency test.
Secondly, referring to fig. 2, the testing method is a far field test, and is applied to testing a high-frequency wave-absorbing material 9, for example, 20GHz to 110GHz, which adopts compact plane wave incidence, and the testing device includes a feed element 5, a feed element 6, a network analyzer 7 and a compact reflecting surface 8.
However, in contrast, when the high-frequency wave-absorbing material 9 is actually applied to a specific test (for example, in a wave-absorbing material application scenario of a millimeter wave radar), the distance between the millimeter wave radar with the frequency of 24 GHz-24.25 GHz and 76 GHz-81 GHz and the wave-absorbing material is very short, for example, 1-2 meters, and is not a far-field plane wave scenario. Therefore, the application scene and the test scene of the wave-absorbing material are different, and the performance parameters seen when the wave-absorbing material is purchased are not available to a great extent compared with the test results according to the actual application.
In conclusion, the marked performance indexes of the purchased wave-absorbing material may not be reliable, so that the test error is very large, and the test needs to be performed again.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a device for testing performance parameters of a wave-absorbing material, which is used for accurately determining the performance parameters of the wave-absorbing material under a test working condition according to a specific test scene.
The utility model provides a device for testing performance parameters of a wave-absorbing material, which comprises: a non-metallic sleeve and a test radar; one end of the non-metal sleeve is opened; the test radar is arranged in the cylinder body of the non-metal sleeve, or is arranged at the other end, opposite to the opening, of the non-metal sleeve.
Preferably, in the device for testing the performance parameters of the wave-absorbing material, the outer wall of the non-metal sleeve is coated with the wave-absorbing layer.
Preferably, in the device for testing the performance parameters of the wave-absorbing material, the non-metallic sleeve is a cylindrical barrel.
Preferably, in the device for testing the performance parameters of the wave-absorbing material, the length of the non-metal sleeve along the axial direction and the diameter of the non-metal sleeve are determined according to the size of the wave-absorbing material to be tested and the size of a test radar.
Preferably, in the device for testing the performance parameters of the wave-absorbing material, the open end of the non-metal sleeve faces the wave-absorbing material to be tested.
Preferably, in the device for testing the performance parameters of the wave-absorbing material, the wave-absorbing material to be tested is attached to the side wall of a microwave darkroom; the non-metal sleeve and the test radar are arranged in the microwave darkroom.
According to the utility model, due to the adoption of the test mode, the vertical test of the electromagnetic wave of the low-frequency wave-absorbing material in the actual application scene and the near-field test of the high-frequency wave-absorbing material in the actual application scene are realized, and compared with the prior art, the performance index of the wave-absorbing material to be tested is accurate and reliable.
And on the premise of determining the range of the wave-absorbing material to be tested, the test radar is arranged in the non-metal sleeve or at one end of the non-metal sleeve, so that the irradiation area of the test radar is limited to correspond to the range of the wave-absorbing material to be tested, and the interference of other areas in the microwave darkroom (for example, the interference of the wave-absorbing material in other areas of the microwave darkroom) is eliminated from the test result, thereby further enhancing the accuracy of the test result.
In addition, the design of the wave-absorbing material sleeve to be tested is more suitable for RCS performance test of the small-area wave-absorbing material, peripheral interference is eliminated, and the limitation that a very wide microwave darkroom needs to be built when the wave-absorbing material to be tested in a small range is tested is avoided. This is because, if there is no sleeve, in order to distinguish the wave-absorbing material to be tested from the wave-absorbing material for the environmental disturbance of the darkroom, the width and height of the darkroom need to be greatly increased, so that the distance from the radar to the wave-absorbing material on the sidewall of the darkroom and the ground or the top wall of the darkroom is far greater than the distance from the radar to the wave-absorbing material to be tested, only so that the source of the echo energy can be distinguished on the test radar, so as to analyze the disturbance, and after the sleeve is designed, the very wide darkroom does not need to be built, the test cost is reduced, and the sleeve is economical and practical.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a first wave-absorbing material performance parameter measurement method provided by a wave-absorbing material manufacturer in the prior art;
FIG. 2 is a second wave-absorbing material performance parameter measurement method provided by wave-absorbing material manufacturers in the prior art;
FIG. 3 is a schematic structural diagram of an embodiment of the wave-absorbing material performance parameter testing device of the utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The design idea of the utility model is as follows: when the performance parameters of the wave-absorbing material to be tested are tested in the anechoic chamber, if the relative RCS characteristics of the wave-absorbing material are directly tested by using a test radar, the irradiation area of the radar in the anechoic chamber is very wide, particularly, the wave beam in the horizontal direction can reach +/-60 degrees, so that noise in a large range can be tested, for example, signals generated by the wave-absorbing material pasted on a side wall, the ground and the top are used as noise, and the accuracy of the performance parameters of the wave-absorbing material to be tested can be directly related.
Based on the structure, the sleeve is additionally arranged for the test radar, and the interference of wave-absorbing materials in other areas in a microwave darkroom is eliminated as much as possible by designing the axial length of the sleeve extending out.
Referring to fig. 3, a schematic structural diagram of an embodiment of the wave-absorbing material performance parameter testing device of the utility model is shown. The test apparatus includes a non-metallic sleeve 30 and a test radar 20. One end of the non-metal sleeve 30 is open; the test radar 20 is disposed in the cylinder of the non-metal sleeve 30, or disposed at the other end of the non-metal sleeve 30 opposite to the opening.
In a using state, the non-metal sleeve 30 and the test radar 20 are arranged in the anechoic chamber 10, the wave-absorbing material 50 to be tested is attached to the side wall of the anechoic chamber 10, and the open end of the non-metal sleeve 30 faces the wave-absorbing material 50 to be tested.
In this embodiment, the sleeve material is only non-metal, and the utility model is not limited as to which non-metal material is specifically selected.
The utility model does not limit the three-dimensional structure of the sleeve, and the hollow cavity has an opening at one end and a test radar at the other end, or the test radar is arranged in the sleeve. The utility model is not limited either.
The utility model is not limited, the sleeve can be a cylinder, a single page does not exclude a cone or a circular truncated cone, and a cylinder is preferred. The utility model is not limited either.
The length of the sub-technical sleeve 30 in the axial direction and the diameter thereof need to be determined according to the size range of the wave-absorbing material to be tested and the size of the test radar. As can be seen from fig. 3, the length of the non-metallic sleeve can be easily determined by knowledge of the plane geometry.
In the utility model, due to the adoption of the test mode, the vertical test of the electromagnetic wave of the low-frequency wave-absorbing material in the actual application scene and the near-field test of the high-frequency wave-absorbing material in the actual application scene are realized, and compared with the prior art, the performance index of the wave-absorbing material to be tested 50 is accurate and reliable.
Moreover, on the premise of defining the coverage range of the wave-absorbing material 50 to be tested, the test radar 20 is arranged in the non-metal sleeve 30 or at one end of the non-metal sleeve 30, so as to limit the irradiation area of the test radar 30 to correspond to the coverage range of the wave-absorbing material 50 to be tested, so that the test result excludes the interference of other areas in the microwave darkroom (for example, the interference of the wave-absorbing material in other areas of the microwave darkroom), and further enhances the accuracy of the test result.
In addition, the design of the non-metallic sleeve 30 is more suitable for the RCS performance test of the small-area wave-absorbing material, and besides eliminating the peripheral interference, the limitation that a very wide microwave anechoic chamber 10 needs to be built when the test of the small-range wave-absorbing material to be tested is carried out is also avoided. This is because, if there is no non-metallic sleeve 30, in order to distinguish the wave-absorbing material 50 to be tested from the interference wave-absorbing material in the microwave chamber 10, the width and height of the microwave chamber 10 need to be set to be large, so that the distance from the test radar 20 to the wave-absorbing material on the side wall and the ground or the top wall of the microwave chamber is far greater than the distance from the radar to the wave-absorbing material to be tested, and only then, the source of the echo energy can be distinguished on the test radar 20, so as to analyze the interference. If the embodiment is used, a wide darkroom does not need to be built, so that the test cost is reduced, and the method is economical and practical.
Referring again to fig. 3, it can be seen that the outer wall of the non-metallic sleeve 30 of this embodiment is coated with a wave-absorbing layer 40.
By adding the wave absorbing layer 40 outside the non-metal sleeve 30, the influence of wave absorbing materials in the areas of the side wall, the ground, the top wall and the like of the microwave anechoic chamber on the test result is eliminated.
It should be noted that, in practice, the data associated with the non-metallic sleeve is also included in the test results, but since the geometry of the non-metallic sleeve 30 is well defined, the data may be excluded by distance.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A wave-absorbing material performance parameter testing device is characterized by comprising:
a non-metallic sleeve (30) and a test radar (20);
one end of the non-metal sleeve (30) is open;
the test radar (20) is arranged in the cylinder body of the non-metal sleeve (30), or is arranged at the other end, opposite to the opening, of the non-metal sleeve (30).
2. The wave-absorbing material performance parameter testing device of claim 1,
the outer wall of the non-metal sleeve (30) is coated with a wave absorbing layer (40).
3. The wave-absorbing material performance parameter testing device of claim 1 or 2,
the non-metal sleeve (30) is a cylinder.
4. The wave-absorbing material performance parameter testing device of claim 3, characterized in that,
the length of the non-metal sleeve (30) along the axial direction and the diameter of the non-metal sleeve (30) are determined according to the size of the wave-absorbing material to be tested and the size of the test radar.
5. The wave-absorbing material performance parameter testing device of claim 4, characterized in that,
the open end of the non-metal sleeve (30) faces the wave-absorbing material (50) to be tested.
6. The wave-absorbing material performance parameter testing device of claim 5, characterized in that,
the wave-absorbing material (50) to be tested is attached to the side wall of the microwave anechoic chamber (10);
the non-metallic sleeve (30) and the test radar (20) are disposed within the microwave anechoic chamber (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122114882.2U CN215986270U (en) | 2021-09-03 | 2021-09-03 | Wave-absorbing material performance parameter testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122114882.2U CN215986270U (en) | 2021-09-03 | 2021-09-03 | Wave-absorbing material performance parameter testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215986270U true CN215986270U (en) | 2022-03-08 |
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| CN202122114882.2U Active CN215986270U (en) | 2021-09-03 | 2021-09-03 | Wave-absorbing material performance parameter testing device |
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| CN (1) | CN215986270U (en) |
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2021
- 2021-09-03 CN CN202122114882.2U patent/CN215986270U/en active Active
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