CN212209738U - Millimeter wave radar - Google Patents
Millimeter wave radar Download PDFInfo
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- CN212209738U CN212209738U CN202020895704.0U CN202020895704U CN212209738U CN 212209738 U CN212209738 U CN 212209738U CN 202020895704 U CN202020895704 U CN 202020895704U CN 212209738 U CN212209738 U CN 212209738U
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- 239000011358 absorbing material Substances 0.000 claims abstract description 101
- 239000000463 material Substances 0.000 claims abstract description 31
- 239000011152 fibreglass Substances 0.000 claims abstract description 22
- 238000002834 transmittance Methods 0.000 abstract description 10
- 238000009434 installation Methods 0.000 abstract description 6
- 238000003754 machining Methods 0.000 abstract description 5
- 230000008859 change Effects 0.000 abstract description 4
- 239000011162 core material Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 8
- 239000012792 core layer Substances 0.000 description 7
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000006880 cross-coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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Abstract
The utility model discloses a millimeter wave radar, including antenna house and at least one millimeter wave antenna, the antenna house includes the main part installation frame that is located antenna house one side, the antenna house body that is located the antenna house opposite side and with antenna house frame fixed connection and the absorbing material who sets up between main part installation frame and antenna house body, millimeter wave antenna and main part installation frame fixed connection; the antenna housing body is made of glass fiber reinforced plastic materials with specific thickness; the antenna housing body is applied to a millimeter wave radar, so that the transmittance of millimeter waves can be improved; lower cost compared to the core material; the glass fiber reinforced plastic is used as a low dielectric coefficient material, the transmittance performance of the glass fiber reinforced plastic is not greatly influenced by the change of the thickness, the requirement on the machining tolerance is low, and the cost can be reduced.
Description
Technical Field
The utility model relates to a radar technical field, concretely relates to millimeter wave radar.
Background
The radome is one of the main accessories of the radar and has the function of protecting the antenna and preventing the influence and interference of the environment on the working state of the radar antenna.
In the prior art, the core layer material is used for the radome of the radar, and the millimeter wave is shorter in wavelength, so that the radome reflects and absorbs more millimeter waves, the wave transmittance is low, and the cost of the core layer material is higher.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a millimeter wave radar.
In order to solve the technical problem, the utility model adopts the following technical scheme:
a millimeter wave radar comprises an antenna housing and at least one millimeter wave antenna, wherein the antenna housing comprises a main body mounting frame positioned on one side of the antenna housing, an antenna housing body positioned on the other side of the antenna housing and fixedly connected with the antenna housing frame, and a wave absorbing material arranged between the main body mounting frame and the antenna housing body, and the millimeter wave antenna is fixedly connected with the main body mounting frame; the antenna housing body is made of glass fiber reinforced plastic materials with the thickness of 0.5 mm-3 mm.
Further, the position of the wave-absorbing material meets the following requirements: in the transverse direction, the wave-absorbing material covers all positions except for the main lobe of the millimeter wave antenna.
Furthermore, the wave-absorbing materials comprise a first wave-absorbing material positioned on the inner side of the millimeter wave antenna, a second wave-absorbing material positioned on the outer side of the millimeter wave antenna, a fifth wave-absorbing material positioned between the two millimeter wave antennas, fourth wave-absorbing materials symmetrically arranged on two outer sides of the fifth wave-absorbing material, and third wave-absorbing materials symmetrically arranged on two outer sides of the fourth wave-absorbing material, wherein the first wave-absorbing material, the second wave-absorbing material and the millimeter wave antenna are positioned at the same height, and the third wave-absorbing material, the fourth wave-absorbing material and the fifth wave-absorbing material are higher than the millimeter wave antennas; the first wave-absorbing material, the third wave-absorbing material, the fourth wave-absorbing material and the fifth wave-absorbing material sequentially form a transverse continuous structure.
Furthermore, the bottom surface of the third wave-absorbing material and the bottom surface of the fourth wave-absorbing material are located on the same horizontal plane, and the vertical distance h1 between the horizontal plane and the bottom surface of the millimeter wave antenna is 5 mm; the thickness of the first wave absorbing material is 2mm, the transverse distance w1 between the center of the millimeter wave antenna and the outer side of the first wave absorbing material is more than or equal to 3.5mm, and the transverse distance w2 between the center of the millimeter wave antenna and the outer side of the third wave absorbing material is more than or equal to 8.7 mm; the bottom surface of the fifth wave-absorbing material and the bottom surface of the millimeter wave antenna are positioned on the same horizontal plane, the thickness of the fifth wave-absorbing material is 8mm, and the distance w3 between the center of the millimeter wave antenna and the side, close to the millimeter wave antenna, of the fifth wave-absorbing material is not less than 47 mm.
Further, the radome further comprises a radome frame; one side of the radome frame is fixedly connected with the radome body, and the radome body is divided into a plurality of local radome small blocks corresponding to the millimeter wave antennas.
Compared with the prior art, the utility model has the advantages that:
1. the radome body is made of glass fiber reinforced plastic materials with certain thickness, and the main body mounting frame is made of high-strength plastics, so that the radome body can be applied to a millimeter wave radar to improve the transmittance of millimeter waves; compared with the core layer material, the cost is lower.
2. The glass fiber reinforced plastic is used as a low dielectric coefficient material, the transmittance performance of the glass fiber reinforced plastic is not greatly influenced by the change of the thickness, the requirement on the machining tolerance is low, and the cost can be reduced.
3. The wave-absorbing material is arranged in the antenna housing, so that received electromagnetic waves can be absorbed, and cross coupling between the transmitted electromagnetic waves and the received electromagnetic waves is prevented, so that the more the wave-absorbing material is transversely covered, the better the millimeter waves have higher requirements on the incident angle characteristics, the wave-absorbing material needs to be strictly arranged, the special design is required to be carried out on the position of the wave-absorbing material, and the wave-absorbing material is prevented from shielding a main lobe of the antenna housing main body.
4. The position of the small local antenna housing block corresponds to the position of the millimeter wave antenna, so that the structural strength is ensured, and meanwhile, the transmittance of millimeter waves is improved.
Drawings
Fig. 1 is a cross-sectional view of the present invention;
FIG. 2 is a schematic structural view of the wave-absorbing material of the present invention;
FIG. 3 is a schematic structural view of the wave-absorbing material of the present invention;
fig. 4 is the utility model discloses the structure schematic diagram of local antenna house fritter.
Detailed Description
A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
Radomes are an important component of radars.
The antenna housing of the millimeter wave radar and the antenna housing of the low-frequency radar have different requirements: firstly, the reflection of millimeter waves is more sensitive to the response of the radome thickness; secondly, the influence of the incident angle characteristics becomes more important; thirdly, since the millimeter wave has a short wavelength, higher requirements are placed on the dielectric properties of the material.
The antenna housing that adopts sandwich layer material now uses on civilian millimeter wave, has following problem: the absorption and reflection of millimeter waves are more, the wave permeability of the millimeter waves is poor, and the material cost of a core layer is higher; when the thickness of the core layer material is changed, the influence on the wave transmittance of the antenna housing is large, so that the machining tolerance needs to be strictly controlled, the machining difficulty is large, and the machining cost is high.
A millimeter wave radar comprises an antenna housing and at least one millimeter wave antenna 7, wherein the antenna housing comprises a main body mounting frame positioned on one side of the antenna housing, an antenna housing body 1 positioned on the other side of the antenna housing and fixedly connected with the antenna housing frame, and a wave absorbing material arranged between the main body mounting frame and the antenna housing body, and the millimeter wave antenna is fixedly connected with the main body mounting frame; the antenna housing body is made of glass fiber reinforced plastic materials with the thickness of 0.5 mm-3 mm.
The antenna housing body is made of glass fiber reinforced plastic materials with certain thickness, the main body installation frame is made of high-strength plastic, and the antenna housing body is applied to the millimeter wave radar, can provide enough strength and can improve the transmittance of millimeter waves.
The dielectric constant of the glass fiber reinforced plastic material is low, the influence of the thickness change on the transmittance of millimeter waves is small, the processing difficulty of the antenna housing can be reduced, and the processing cost of the antenna housing is reduced.
The position of the wave-absorbing material meets the following requirements: in the transverse direction, the wave-absorbing material covers all positions except for the main lobe of the millimeter wave antenna.
The wave absorbing materials comprise a first wave absorbing material 6 positioned on the inner side of a millimeter wave antenna 7, a second wave absorbing material 8 positioned on the outer side of the millimeter wave antenna, a fifth wave absorbing material 3 positioned between the two millimeter wave antennas, fourth wave absorbing materials 4 symmetrically arranged on the two outer sides of the fifth wave absorbing material, and third wave absorbing materials 5 symmetrically arranged on the two outer sides of the fourth wave absorbing material, wherein the first wave absorbing material and the second wave absorbing material are positioned at the same height with the millimeter wave antenna, and the third wave absorbing material, the fourth wave absorbing material and the fifth wave absorbing material are higher than the millimeter wave antenna; the first wave-absorbing material, the third wave-absorbing material, the fourth wave-absorbing material and the fifth wave-absorbing material sequentially form a transverse continuous structure.
The bottom surfaces of the third wave-absorbing material 5 and the fourth wave-absorbing material 4 are located on the same horizontal plane, and the vertical distance h1 from the horizontal plane to the bottom surface of the millimeter wave antenna 7 is 5 mm; the thickness of the first wave absorbing material 6 is 2mm, the transverse distance w1 between the center of the millimeter wave antenna and the outer side of the first wave absorbing material is more than or equal to 3.5mm, and the transverse distance w2 between the center of the millimeter wave antenna and the outer side of the third wave absorbing material is more than or equal to 8.7 mm; the bottom surface of the fifth wave-absorbing material and the bottom surface of the millimeter wave antenna are positioned on the same horizontal plane, the thickness of the fifth wave-absorbing material is 8mm, and the distance w3 between the center of the millimeter wave antenna and the side, close to the millimeter wave antenna, of the fifth wave-absorbing material is not less than 47 mm.
The main lobe of the antenna is the largest radiation beam located on the antenna pattern.
The angle between the two directions at which the power density drops to half, on either side of the main lobe maximum, is called the main lobe width.
The width of the main lobe of the millimeter wave antenna is 120 degrees, the position of each wave-absorbing material can be calculated according to the principle of geometry, and the minimum distance between the wave-absorbing material and the millimeter wave antenna is determined according to the thickness of the wave-absorbing material.
Clutter can be effectively adsorbed after the wave-absorbing material is applied to the interior of the antenna housing, the influence of the clutter is reduced, and the transmittance of millimeter waves can be improved.
The higher the transverse coverage rate of the wave-absorbing material is, the higher the wave-absorbing effect is and the higher the passing rate of the millimeter waves is; the transverse total width a of the wave-absorbing material and the total width b of the millimeter wave radar after the millimeter wave antenna main lobe width is removed are as follows: and a/b, when the transverse coverage rate of the wave-absorbing material reaches 1, the wave-absorbing material has the best wave-absorbing effect.
The radome further comprises a radome frame 2; one side of the radome frame is fixedly connected with the radome body 1, and the radome body is divided into a plurality of local radome small blocks 11 corresponding to the millimeter wave antennas 7; the radome frame and the radome body are of an integral structure; the whole structural strength can be strengthened to the antenna housing frame, nevertheless can exert an influence to the transmissivity of millimeter wave for the antenna housing frame avoids the position that the millimeter wave antenna corresponds, makes the position of local antenna housing fritter corresponding with the position of millimeter wave antenna, has improved the transmissivity of millimeter wave when having guaranteed structural strength.
The single-layer glass fiber reinforced plastic material has low dielectric constant, so that the manufactured radome has broadband response, namely, the loss change is not large when millimeter waves with different frequencies penetrate through the radome.
The material of main part installation frame is high strength plastic.
Example 1: the radome is made of glass fiber reinforced plastic material and has a thickness of 0.5 mm.
Example 2: the radome is made of glass fiber reinforced plastic material and has a thickness of 1 mm.
Example 3: the radome is made of glass fiber reinforced plastic material and has a thickness of 2 mm.
Example 4: the radome is made of glass fiber reinforced plastic material and has a thickness of 3 mm.
Comparative example 1: the radome is made of glass fiber reinforced plastic material and has a thickness of 5 mm.
Comparative example 2: the antenna housing is made of a core layer material and has the thickness of 2 mm.
Comparative example 3: the antenna housing is made of a core layer material and has the thickness of 5 mm.
Tests were conducted on the above examples and comparative examples, and the test results in the above table were obtained with the cost, strength, and loss of example 2 as the reference, set to 100.
As can be seen from example 3 and comparative example 2, and comparative example 1 and comparative example 3, the strength of the radome made of the glass fiber reinforced plastic material is greater than 70, that is, the strength meets the requirement, while the cost of the glass fiber reinforced plastic material is lower, the loss of millimeter waves is smaller, and the wave permeability is stronger; in this test, the strength of the radome is equal to or greater than 70, which means that the strength satisfies the requirements.
As can be seen from the comparison between examples 1-4 and comparative examples 1-3, when the antenna cover is made of 0.5 mm-3 mm glass fiber reinforced plastic material, the strength of the obtained product is ensured, the cost is reduced, and the wave permeability is improved. Wherein, when the thickness of the glass fiber reinforced plastic is less than 0.5mm, the strength is greatly reduced, and the glass fiber reinforced plastic can not be applied to industrial production.
The utility model discloses an antenna house body is the glass steel material of specific thickness to cooperation absorbing material's position design can provide one kind for the radar and have qualified intensity, and low-cost, the antenna house of high wave-transparent rate.
The utility model discloses an antenna house body adopts the individual layer glass steel material, and main part installation frame adopts high strength plastic, abandons traditional double glazing steel and adds the mode of honeycomb material, and the cost is lower, weight is littleer, wave-transparent rate is higher.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. A millimeter wave radar comprising a radome and at least one millimeter wave antenna (7), characterized in that: the antenna housing comprises a main body mounting frame positioned on one side of the antenna housing, an antenna housing body (1) positioned on the other side of the antenna housing and fixedly connected with the antenna housing frame, and a wave absorbing material arranged between the main body mounting frame and the antenna housing body, wherein the millimeter wave antenna is fixedly connected with the main body mounting frame; the antenna housing body is made of glass fiber reinforced plastic materials with the thickness of 0.5 mm-3 mm.
2. The millimeter wave radar according to claim 1, wherein: the position of the wave-absorbing material meets the following requirements: in the transverse direction, the wave-absorbing material covers all positions except for the main lobe of the millimeter wave antenna.
3. The millimeter wave radar according to claim 2, wherein: the wave absorbing materials comprise a first wave absorbing material (6) positioned on the inner side of a millimeter wave antenna (7), a second wave absorbing material (8) positioned on the outer side of the millimeter wave antenna, a fifth wave absorbing material (3) positioned between the two millimeter wave antennas, fourth wave absorbing materials (4) symmetrically arranged on the two outer sides of the fifth wave absorbing material, and third wave absorbing materials (5) symmetrically arranged on the two outer sides of the fourth wave absorbing material, wherein the first wave absorbing material, the second wave absorbing material and the millimeter wave antenna are positioned at the same height, and the third wave absorbing material, the fourth wave absorbing material and the fifth wave absorbing material are higher than the millimeter wave antennas; the first wave-absorbing material, the third wave-absorbing material, the fourth wave-absorbing material and the fifth wave-absorbing material sequentially form a transverse continuous structure.
4. The millimeter wave radar according to claim 3, wherein: the bottom surfaces of the third wave-absorbing material (5) and the fourth wave-absorbing material (4) are positioned on the same horizontal plane, and the vertical distance h1 between the horizontal plane and the bottom surface of the millimeter wave antenna (7) is 5 mm; the thickness of the first wave absorbing material (6) is 2mm, the transverse distance w1 between the center of the millimeter wave antenna and the outer side of the first wave absorbing material is more than or equal to 3.5mm, and the transverse distance w2 between the center of the millimeter wave antenna and the outer side of the third wave absorbing material is more than or equal to 8.7 mm; the bottom surface of the fifth wave-absorbing material and the bottom surface of the millimeter wave antenna are positioned on the same horizontal plane, the thickness of the fifth wave-absorbing material is 8mm, and the distance w3 between the center of the millimeter wave antenna and the side, close to the millimeter wave antenna, of the fifth wave-absorbing material is not less than 47 mm.
5. The millimeter wave radar according to claim 1, wherein: the radome further comprises a radome frame (2); one side of the radome frame is fixedly connected with the radome body (1), and the radome body is divided into a plurality of local radome small blocks (11) corresponding to the millimeter wave antennas (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020895704.0U CN212209738U (en) | 2020-05-25 | 2020-05-25 | Millimeter wave radar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020895704.0U CN212209738U (en) | 2020-05-25 | 2020-05-25 | Millimeter wave radar |
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| CN212209738U true CN212209738U (en) | 2020-12-22 |
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| CN202020895704.0U Active CN212209738U (en) | 2020-05-25 | 2020-05-25 | Millimeter wave radar |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022218258A1 (en) * | 2021-04-15 | 2022-10-20 | 华为技术有限公司 | Detection apparatus, radome, millimeter-wave radar and terminal device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022218258A1 (en) * | 2021-04-15 | 2022-10-20 | 华为技术有限公司 | Detection apparatus, radome, millimeter-wave radar and terminal device |
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Effective date of registration: 20230403 Address after: 200241 Rooms 203 and 204, Floor 2, Building 1, No. 58, Yuanmei Road, Minhang District, Shanghai Patentee after: Shanghai Nano Technology Co.,Ltd. Address before: 4 / F, building 8, 168 Jixin Road, Minhang District, Shanghai, 201104 Patentee before: Shanghai Zaide Information Technology Co.,Ltd. Patentee before: Shanghai Zaide Information Security Technology Co.,Ltd. |