CN211858893U - 77GHz millimeter wave radar dysmorphism antenna house - Google Patents
77GHz millimeter wave radar dysmorphism antenna house Download PDFInfo
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- CN211858893U CN211858893U CN202020197259.0U CN202020197259U CN211858893U CN 211858893 U CN211858893 U CN 211858893U CN 202020197259 U CN202020197259 U CN 202020197259U CN 211858893 U CN211858893 U CN 211858893U
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Abstract
The utility model provides a 77GHz millimeter wave radar special-shaped antenna housing which is arranged above a radar integrated board card; the radome surface is divided into a first region and a second region. The antenna housing first area is positioned right above the antenna area of the integrated board card and is close to the integrated board card, so that the influence of the antenna housing on an antenna directional diagram is reduced; the second area of the antenna housing is positioned right above the integrated board card radio frequency circuit and is far away from the integrated board card so as to avoid a radio frequency chip, so that the requirement of the distance between the antenna area of the integrated board card and the inner wall of the antenna housing is met, and the requirement of avoiding the radio frequency chip is met; the antenna house global design adopts homogeneous thickness, sees the regional local protrusion of second from the outward appearance, the utility model discloses an aspect has guaranteed the antenna and has surveyed the precision, and on the other hand has strengthened the bulk stiffness because the antenna house is local to be salient, has reduced the deflection in the production of moulding plastics, has improved the antenna house plane degree.
Description
Technical Field
The utility model belongs to the technical field of the millimeter wave radar, concretely relates to 77GHz millimeter wave radar dysmorphism antenna house.
Background
The early 77GHz millimeter wave radar internally comprises two board cards which are an antenna board and a processing board respectively. The front surface of the antenna plate is only provided with an antenna, other circuits and chips are not arranged, the surface height is consistent, the transmitting and receiving functions of electromagnetic waves are achieved, and the back surface of the antenna plate is provided with a radio frequency circuit and a radio frequency chip, so that the function of processing radio frequency signals is achieved. The front surface and the back surface of the processing board are both provided with a processing circuit and a processing chip for processing low-frequency signals.
With the development of miniaturization and integration of 77GHz millimeter wave radar, an antenna and a processing circuit are all integrated on one board card, which is called an integrated board card. The front surface of the integrated board card is distributed with an antenna and a radio frequency circuit, and the surface heights are different. The back of the integrated board card is provided with a processing circuit and a processing chip.
The theory shows that when the distance between the inner wall of the antenna housing and the antenna is half wavelength of the electromagnetic wave frequency, the antenna housing has the minimum influence on an antenna directional diagram, and the detection precision of the antenna is the highest. For a 77GHz antenna, the wavelength of electromagnetic waves is 3.9mm, and the designed distance between the inner wall of the antenna housing and the antenna is 1.95 mm. The thickness of the antenna layer is typically 0.127 mm. The radio frequency chip on the front surface of the integrated board card and the resistance-capacitance device attached to the radio frequency chip are about 2.8mm in height.
The design of the antenna cover needs to ensure the distance from the antenna and also ensure that the antenna cover does not interfere with the chip.
In order to meet the requirements, after part of the antenna housing is molded by injection molding, part of the antenna housing is milled by a machining center so as to achieve the purpose of avoiding the radio frequency chip and the accessory resistance-capacitance device thereof, and the method undoubtedly greatly increases the production cost; in addition, part of the antenna housing is distributed according to the integrated board card, different thickness designs are adopted in all areas of the antenna housing, the method can lead to overlarge residual stress in the injection molding process, the antenna housing is poor in appearance, and when the thickness is thick, an inner cavity is easy to appear, so that the strength of the antenna housing is influenced.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a 77GHz millimeter wave radar dysmorphism antenna house, both satisfied antenna and antenna house inner wall distance's requirement, satisfy again and not take place the requirement of interfering with integration surface chip device.
A radome of a 77GHz millimeter wave radar comprises a first area (11) and a second area (12) which are integrally processed and have the same thickness; the first area (11) is positioned above an antenna (22) in the integrated board card (2) of the 77GHz millimeter wave radar, and the second area (12) is positioned above a radio frequency circuit and a chip (23) of the 77GHz millimeter wave radar; a first support (13) is arranged on the outer edge of the lower surface of the first area (11) and supported on a substrate (21) in the integrated board card (2); and a second support (14) is arranged on the outer edge of the lower surface of the second area (12) and supported on the substrate (21).
Preferably, the antenna housing (1) is produced in an injection molding mode.
The utility model discloses following beneficial effect has:
the utility model provides a 77GHz millimeter wave radar special-shaped antenna housing which is arranged above a radar integrated board card; the radome surface is divided into a first region and a second region. The antenna housing first area is positioned right above the antenna area of the integrated board card and is close to the integrated board card, so that the influence of the antenna housing on an antenna directional diagram is reduced; the second area of the antenna housing is positioned right above the integrated board card radio frequency circuit and is far away from the integrated board card so as to avoid a radio frequency chip, so that the requirement of the distance between the antenna area of the integrated board card and the inner wall of the antenna housing is met, and the requirement of avoiding the radio frequency chip is met;
the antenna house global design adopts homogeneous thickness, sees the regional local protrusion of second from the outward appearance, the utility model discloses an aspect has guaranteed the antenna and has surveyed the precision, and on the other hand has strengthened the bulk stiffness because the antenna house is local to be salient, has reduced the deflection in the production of moulding plastics, has improved the antenna house plane degree.
Drawings
Fig. 1 is a schematic cross-sectional view of a radome in an embodiment of the present invention;
fig. 2 is a front view and a cross-sectional view of an integrated board card in an embodiment of the present invention;
fig. 3 is a schematic diagram of the relative positions of the antenna housing and the board card in the embodiment of the present invention.
The antenna comprises a radome 1, a radome 11, a first area, a radome 12, a second area, a first support 13, a second support 14, an integrated board card 2, a substrate 21, an antenna 22, a radio frequency circuit 23 and a chip.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings by way of examples.
As shown in fig. 1, the radome of the embodiment of the present invention includes: a first region 11, a second region 12, a first support 13, a second support 14. The antenna housing part above the antenna on the integrated board card is indicated in the first area, and the antenna housing part above the integrated board card radio-frequency circuit and the chip is indicated in the second area.
The utility model discloses the first region 11 of the antenna house of example, the thickness of the regional 12 of second is unanimous, has guaranteed that the finished product of moulding plastics can not appear the stress trace.
As shown in fig. 2, the integrated board card 2 includes a substrate 21, an antenna 22, a radio frequency circuit, and a chip 23. The antenna 22 has a thickness D1The highest device of the radio frequency circuit and the chip 23 is H1In this embodiment, H1Greater than D1。
The integrated board card and the radome are assembled schematically, as shown in fig. 3. The first region 11 is located above the antenna 22, and the second region 12 is located above the rf circuit and the chip 23.
The distance l from the antenna 22 to the inner wall of the first region 111The distance between the inner wall of the second region 12 and the highest point of the RF circuit and the chip 23 is l2. The difference in height between the first region 11 and the second region 12 is l in appearance2+H1-l1-D1。
The first support 13 and the second support 14 of the radome 1 are in contact with the integrated board card substrate 21, and play roles in supporting and limiting. The height of the first support 13 is l1+D1The height of the second support 14 is l2+H1。
In summary, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. A77 GHz millimeter wave radar special-shaped antenna housing is characterized by comprising a first area (11) and a second area (12) which are integrally processed and have the same thickness; the first area (11) is positioned above an antenna (22) in the integrated board card (2) of the 77GHz millimeter wave radar, and the second area (12) is positioned above a radio frequency circuit and a chip (23) of the 77GHz millimeter wave radar; a first support (13) is arranged on the outer edge of the lower surface of the first area (11) and supported on a substrate (21) in the integrated board card (2); and a second support (14) is arranged on the outer edge of the lower surface of the second area (12) and supported on the substrate (21).
2. The 77GHz millimeter wave radar special-shaped antenna housing according to claim 1, characterized in that the antenna housing (1) is produced by injection molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020197259.0U CN211858893U (en) | 2020-02-21 | 2020-02-21 | 77GHz millimeter wave radar dysmorphism antenna house |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020197259.0U CN211858893U (en) | 2020-02-21 | 2020-02-21 | 77GHz millimeter wave radar dysmorphism antenna house |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211858893U true CN211858893U (en) | 2020-11-03 |
Family
ID=73248653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020197259.0U Active CN211858893U (en) | 2020-02-21 | 2020-02-21 | 77GHz millimeter wave radar dysmorphism antenna house |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211858893U (en) |
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2020
- 2020-02-21 CN CN202020197259.0U patent/CN211858893U/en active Active
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