CN108400440A - A kind of wide angle antenna house and antenna assembly suitable for vehicle-mounted millimeter wave radar - Google Patents
A kind of wide angle antenna house and antenna assembly suitable for vehicle-mounted millimeter wave radar Download PDFInfo
- Publication number
- CN108400440A CN108400440A CN201810046004.1A CN201810046004A CN108400440A CN 108400440 A CN108400440 A CN 108400440A CN 201810046004 A CN201810046004 A CN 201810046004A CN 108400440 A CN108400440 A CN 108400440A
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- China
- Prior art keywords
- antenna
- vehicle
- millimeter wave
- wave radar
- mounted millimeter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000011358 absorbing material Substances 0.000 claims abstract description 20
- 239000011800 void material Substances 0.000 claims abstract description 5
- 238000010276 construction Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000010287 polarization Effects 0.000 abstract description 9
- 230000002265 prevention Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 9
- 230000005855 radiation Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000007423 decrease Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000001965 increasing effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
- H01Q1/3233—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
- H01Q17/001—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems for modifying the directional characteristic of an aerial
Abstract
The present invention relates to a kind of wide angle antenna houses and antenna assembly suitable for vehicle-mounted millimeter wave radar, wherein, wide angle antenna house includes the absorbing material layer for covering the outer housing of antenna element and being arranged in the outer housing, wherein, the outer housing has the internal face towards the antenna element, and the internal face be equipped with the position of the antenna element it is raised correspondingly, the absorbing material layer offers the void region for accommodating the protrusion correspondingly.The antenna element and the above-mentioned wide angle antenna house suitable for vehicle-mounted millimeter wave radar that antenna assembly includes pcb board, is arranged on the pcb board surface.The present invention can broaden the beam angle of vehicle-mounted millimeter wave radar antenna polarization vertical direction, promote the performance to function after vehicle-mounted millimeter wave radar, and be easily installed in the small spaces such as the gap between vehicle bumper and collision prevention girders.
Description
Technical field
The present invention relates to a kind of wide angle antenna houses and antenna assembly suitable for vehicle-mounted millimeter wave radar.
Background technology
Automatic Pilot in the industry, millimetre-wave radar sensor is because its moderate cost, environmental suitability are strong and remote
Detectivity is preferably and as one of mainstream detection sensor.The working frequency range of vehicle-mounted millimeter wave Radar Products includes at present
24GHz and 77GHz.
For it is rear to the vehicle-mounted millimeter wave radar major function of function include blind-spot detection (BSD), doubling auxiliary (LCA),
Rear cross traffic warning (RCTA) etc..The antenna beamwidth different from of this several functional requirements covering, therefore in order to
Enough that this several functions are covered in a radar, the Azimuth beam of antenna element needs comparable width.
Main accessories of the antenna house as radar, one of effect are protection antennas, are ensureing antenna house wave transmission effect
Under the premise of, prevent influence and interference of the environment to radar antenna working condition.
Traditional antenna cover generally takes the wall thickness to be near 0.5 times of wavelength or its integral multiple, and inside and outside wall is plane.For example,
Patent《Vehicular radar device and its antenna house》(CN102956969A) antenna house is disclosed in uses above-mentioned design, because its
Electromagnetic wave energy reflection can be made minimum using 0.5 times of wavelength when the theoretical premise of analysis is electromagnetic wave vertical incidence, wave transparent
Effect is best.However, it is generally wider to the wave beam of the vehicle-mounted millimeter wave radar antenna of function after being applied to, therefore oblique incidence energy
It is larger, antenna beam can be caused to be narrowed so as to cause the half-wavelength thickness antenna house for reflecting stronger therefore traditional, such as Fig. 6 (figures
Abscissa is antenna radiation pattern angle in 6, and ordinate is antenna radiation pattern gain) in shown in dotted line, traditional antenna cover can cause
Antenna assembly ± 60 ° gain decline it is fairly obvious, gain decline generally in 11dB or so, therefore to millimetre-wave radar after
It is produced bigger effect to application performance.
For this purpose, the improvement in structure has been carried out to this traditional antenna house in the prior art, to overcome the above problem.Example
Such as, patent《Antenna house, antenna assembly and radar installations》(CN102237571B) a kind of antenna house of arch is disclosed in, with exhibition
Broad beam, specifically can be by beam-broadening to 24 °~26 °.However, the section of this antenna house is higher, and due to backward function
Automobile Millimeter Wave Radar installation site between rear bumper and collision prevention girders, narrow space, therefore for such design
Antenna house, it is difficult to install.
Invention content
In order to solve the above-mentioned problems of the prior art, the present invention is intended to provide a kind of being suitable for vehicle-mounted millimeter wave radar
Wide angle antenna house and antenna assembly, with broaden vehicle-mounted millimeter wave radar antenna polarize vertical direction beam angle, promoted
To the performance of function after vehicle-mounted millimeter wave radar, and the narrow sky such as be easily installed the gap between vehicle bumper and collision prevention girders
In.
A kind of wide angle antenna house suitable for vehicle-mounted millimeter wave radar described in one of present invention comprising cover antenna
The outer housing of unit, the antenna house further include：Absorbing material layer in the outer housing is set, wherein the outer housing
With the internal face towards the antenna element, and the internal face is equipped with convex correspondingly with the position of the antenna element
It rises, the absorbing material layer offers the void region for accommodating the protrusion correspondingly.
The above-mentioned wide angle antenna house suitable for vehicle-mounted millimeter wave radar, the outer housing includes：It wall and encloses
Around the edge of the wall towards the support construction of the antenna element protrusion, wherein the wall have flat outside wall surface and with
The internal face that the outside wall surface is oppositely arranged.
The above-mentioned wide angle antenna house suitable for vehicle-mounted millimeter wave radar, the absorbing material layer is arranged by institute
It states in the space that support construction surrounds.
The above-mentioned wide angle antenna house suitable for vehicle-mounted millimeter wave radar, the thickness d of the protrusion1Value model
Enclose for：0 ＜ d10.5 λ of ＜, wherein λ is air wavelength.
The above-mentioned wide angle antenna house suitable for vehicle-mounted millimeter wave radar, the thickness d of the protrusion1For 0.4 λ.
The above-mentioned wide angle antenna house suitable for vehicle-mounted millimeter wave radar, the thickness of the absorbing material layer takes
It is worth range d2For：0 ＜ d2≤ 0.5 λ, wherein λ is air wavelength.
A kind of antenna assembly suitable for vehicle-mounted millimeter wave radar described in the two of the present invention comprising：It pcb board and sets
The antenna element on the pcb board surface is set, the antenna assembly further includes：It is suitable for vehicle-mounted millimeter wave radar as described above
Wide angle antenna house, wherein：The outer housing is located above the pcb board, and the protrusion is correspondingly described in face
Antenna element, and the absorbing material layer is bonded with the pcb board.
Above-mentioned suitable for the antenna assembly of vehicle-mounted millimeter wave radar, the antenna element is to cover what steel structure was formed
Antenna.
As a result of above-mentioned technical solution, the beneficial effects of the present invention are：
1, broadening vehicle-mounted millimeter wave radar antenna Element Polarization has been reached by the figuration of the internal face of wide angle antenna house
The effect of the beam angle of vertical direction；It is compared to traditional antenna cover (series fed antenna Element Polarization vertical direction ± 60 ° wave beam
The gain of width declines generally in 11dB or so), using the antenna element polarization Vertical Square of the antenna assembly of wide angle antenna house
Gain to ± 60 ° of beam angles declines generally within 5dB.
2, since the figuration structure of wide angle antenna house is on internal face, outside wall surface is writing board shape, antenna house shell
The thickness of body be 0.5~1.5 times of wavelength (integral thickness for corresponding to 77GHz band antennas cover and antenna assembly be 3.9mm~
5.8mm), therefore, while antenna beam broadens, the low section characteristic of antenna house and easy conformability be ensure that, consequently facilitating
The small spaces such as the gap between vehicle bumper and collision prevention girders.
Description of the drawings
Fig. 1 is the structural upright of outer housing a kind of wide angle antenna house suitable for vehicle-mounted millimeter wave radar of the invention
Figure；
Fig. 2 is that the structure of absorbing material layer a kind of wide angle antenna house suitable for vehicle-mounted millimeter wave radar of the invention is vertical
Body figure；
Fig. 3 is a kind of structure sectional view of antenna assembly suitable for vehicle-mounted millimeter wave radar in the present invention；
Fig. 4 is a kind of structural perspective of antenna assembly suitable for vehicle-mounted millimeter wave radar in the present invention；
Fig. 5 is a kind of structure of pcb board and antenna element suitable for the antenna assembly of vehicle-mounted millimeter wave radar of the present invention
Schematic diagram；
Fig. 6 shows that no antenna house, traditional half-wavelength thickness antenna house and the present invention are a kind of suitable for vehicle-mounted millimeter wave
The comparable situation of three kinds of antenna radiation patterns corresponding to the wide angle antenna house of radar, wherein abscissa is antenna radiation pattern angle
The case where the case where degree, ordinate are antenna radiation pattern gain, and chain-dotted line indicates no antenna house, dotted line indicates traditional antenna cover,
Solid line indicates the case where inventive antenna cover.
Specific implementation mode
Below in conjunction with the accompanying drawings, presently preferred embodiments of the present invention is provided, and is described in detail.
Please refer to Fig.1-5, one of present invention, i.e. a kind of wide angle antenna house suitable for vehicle-mounted millimeter wave radar, including：
Outer housing 1 and setting for covering antenna element 3 (in the present embodiment, the quantity of antenna element is 3) is in outer housing 1
Interior absorbing material layer 2, wherein：
Outer housing 1 includes：Support construction 12 of the edge of wall 11 and surrounding wall 11 towards 3 protrusion of antenna element, wherein wall
11 have flat outside wall surface 111 and are oppositely arranged with the outside wall surface 111 and the internal face 112 towards antenna element, and should
It (is rectangular preiection in the present embodiment, and it is counted that internal face 112, which is equipped with the position of antenna element 3 one-to-one raised 113,
Amount is 3)；
Absorbing material layer 2 is arranged in the space surrounded by support construction 12, and offers for accommodating correspondingly
The void region 21 of protrusion 113 (in the present embodiment, the quantity of void region 21 is 3).
The two of the present invention, i.e. a kind of antenna assembly suitable for vehicle-mounted millimeter wave radar, including：Above-mentioned wide angle antenna
Cover, pcb board 4 and be arranged on 4 surface of pcb board antenna element 3 (in the present embodiment, antenna element 3 be cover steel structure shape
At antenna), wherein：
The outer housing 1 of wide angle antenna house is located at 4 top of pcb board, and protrusion 113 faces antenna list correspondingly
Member 3, and absorbing material layer 2 is bonded with pcb board 4.
In the present invention, the outside wall surface 111 of the outer housing 1 of wide angle antenna house is contacted with external environment, primarily serves guarantor
The effect of antenna assembly is protected, inner wall surface thereof 112 corresponds to each antenna element and adds protrusion 113, to pass through the figuration pair of structure
The antenna pattern of antenna is adjusted, and broadens the directional diagram of antenna；The absorbing material layer 2 of wide angle antenna house is around protrusion
113 are arranged and between outer housing 1 and the pcb board 4 of antenna assembly, can be used for absorbing protrusion 113 and internal face 112 is brought
Reflected energy, reduce reflected energy superposition caused by antenna radiation pattern rise and fall so that Antenna Far Field directional diagram is more smooth.
In the present invention, the antenna element 3 in antenna assembly coordinates the structure of wide angle antenna house to be designed to radiating surface towards wide angle day
The antenna of irdome protrusions 112 dissipates to make the electromagnetic wave energy that it gives off pass through protrusion 113, so that antenna side
Apparent broadening has been obtained to figure.
In the present embodiment, 1 upper surface of outer housing is planar structure, according to vertically the entering in dielectric interface of electromagnetic wave
The thickness of principle of reflection when penetrating, the wall 11 of outer housing 1 is 0.5 times of medium wavelength or its integral multiple；The support construction of outer housing 1
12 ensure that the distance of pcb board 4 of the internal face 112 away from antenna assembly is 0.5 times of air wavelength.Rectangular preiection on internal face
113, using electromagnetic waves refraction principle in the medium, electromagnetic wave energy are dissipated, and play the effect of broadening wave beam, length and
The size of width and radar antenna unit is almost the same, and adjustable parameter is the thickness of protrusion 113, and thickness range is required for
Beam angle could be provided as：0 ＜ d10.5 λ of ＜, wherein d1For the thickness of protrusion 113, λ is air wavelength.Preferably, when
Protrusion 113 thickness from 0 thicken to 0.4 λ when, the 3 vertical polarization directions wave beam ± 60 ° gain of antenna element of respective antenna device
Decline and is promoted from 11dB to 5dB.
Other spaces between pcb board 4 and outer housing 1 in addition to protrusion 113 are completely covered the absorbing material layer 2, thick
Degree is ranging from：0 ＜ d2≤ 0.5 λ, wherein d2For the thickness of absorbing material layer 2, λ is air wavelength.When absorbing material layer 3 is complete
When filling (when its thickness is 0.5 λ), Antenna Far Field directional diagram is more smooth (shown in solid in such as Fig. 6), still ± 60 ° of increasings
Benefit declines bigger；When absorbing material layer 2 fills less, gain decline in Antenna Far Field directional diagram ± 60 ° is smaller, but radiation angle
Directional diagram big rise and fall in degree, therefore the requirement of antenna radiation pattern can be adjusted according to when practical application.
In the present embodiment, pcb board 4 can be determined according to the size of radar, and the antenna on surface covers steel structure (i.e.
Antenna element) it can be designed according to required direction diagram form.Micro-strip series fed antenna (other types are used in the present embodiment
Microstrip antenna, such as dipole antenna etc. it is also applicable), which is microstrip antenna series form, polarization direction
It is parallel with serial orientation.The antenna element is formed by directional diagram and forms radar bearing to wave beam (such as Fig. 6 in vertical polarization directions
Shown in chain lines).According to the requirement of radar, it is desirable in vertical polarization directions, i.e., in the direction by beam-broadening, at this
In the antenna assembly of invention (no antenna house situation), the gain of broad beam direction ± 60 ° falls to 8.4dB.In addition, the present embodiment
In, 3 antenna elements 3 are provided on pcb board 4 can adjust the quantity of antenna element 3 according to radar performance demand.
In conclusion the present invention passes through the inner wall figuration of antenna house and the use of absorbing material so that antenna house is to antenna
Directional diagram is adjusted, and vehicle-mounted millimeter wave radar series fed antenna polarization vertical direction beam angle is thus broadened, after meeting
Demand is covered to the wide angle of the vehicle-mounted millimeter wave radar of function (BSD, LCA, RCTA), and then to the vehicle-mounted of function after improving
The performance of millimetre-wave radar major function.
Above-described, only presently preferred embodiments of the present invention is not limited to the scope of the present invention, of the invention is upper
Stating embodiment can also make a variety of changes.Made by i.e. every claims applied according to the present invention and description
Simply, equivalent changes and modifications fall within the claims of patent of the present invention.The not detailed description of the present invention is
Routine techniques content.
Claims (8)
1. a kind of wide angle antenna house suitable for vehicle-mounted millimeter wave radar comprising the outer housing of antenna element is covered, it is special
Sign is that the antenna house further includes：Absorbing material layer in the outer housing is set, wherein the outer housing has face
To the internal face of the antenna element, and the internal face is equipped with the position of the antenna element raised correspondingly, institute
It states absorbing material layer and offers void region for accommodating the protrusion correspondingly.
2. the wide angle antenna house according to claim 1 suitable for vehicle-mounted millimeter wave radar, which is characterized in that described outer
Shell includes：Wall and around the edge of the wall towards the support construction of the antenna element protrusion, wherein the wall has flat
Smooth outside wall surface and the internal face being oppositely arranged with the outside wall surface.
3. the wide angle antenna house according to claim 2 suitable for vehicle-mounted millimeter wave radar, which is characterized in that the suction
Wave material layer is arranged in the space surrounded by the support construction.
4. the wide angle antenna house according to claim 1 suitable for vehicle-mounted millimeter wave radar, which is characterized in that described convex
The thickness d risen1Value range be：0 ＜ d10.5 λ of ＜, wherein λ is air wavelength.
5. the wide angle antenna house according to claim 4 suitable for vehicle-mounted millimeter wave radar, which is characterized in that described convex
The thickness d risen1For 0.4 λ.
6. the wide angle antenna house according to claim 1 suitable for vehicle-mounted millimeter wave radar, which is characterized in that the suction
The value range d of the thickness of wave material layer2For：0 ＜ d2≤ 0.5 λ, wherein λ is air wavelength.
7. a kind of antenna assembly suitable for vehicle-mounted millimeter wave radar comprising：Pcb board and setting are on the pcb board surface
Antenna element, which is characterized in that the antenna assembly further includes：It is suitable for as described in any one of claim 1-7
The wide angle antenna house of vehicle-mounted millimeter wave radar, wherein：The outer housing is located above the pcb board, and the protrusion is one by one
Accordingly antenna element described in face, and the absorbing material layer is bonded with the pcb board.
8. the antenna assembly according to claim 7 suitable for vehicle-mounted millimeter wave radar, which is characterized in that the antenna list
Member is to cover the antenna of steel structure formation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810046004.1A CN108400440A (en) | 2018-01-17 | 2018-01-17 | A kind of wide angle antenna house and antenna assembly suitable for vehicle-mounted millimeter wave radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810046004.1A CN108400440A (en) | 2018-01-17 | 2018-01-17 | A kind of wide angle antenna house and antenna assembly suitable for vehicle-mounted millimeter wave radar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108400440A true CN108400440A (en) | 2018-08-14 |
Family
ID=63094642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810046004.1A Pending CN108400440A (en) | 2018-01-17 | 2018-01-17 | A kind of wide angle antenna house and antenna assembly suitable for vehicle-mounted millimeter wave radar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108400440A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111446547A (en) * | 2020-05-25 | 2020-07-24 | 上海载德信息科技股份有限公司 | Antenna housing and millimeter wave radar device |
| CN113009474A (en) * | 2021-02-09 | 2021-06-22 | 北京算丰征途科技有限公司 | Large-range high-resolution millimeter wave radar antenna and system for detecting human body posture |
| CN114096878A (en) * | 2019-06-28 | 2022-02-25 | 株式会社电装 | Radar apparatus |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007235287A (en) * | 2006-02-28 | 2007-09-13 | Hitachi Ltd | Vehicle-mounted electromagnetic wave radar |
| CN103779667A (en) * | 2014-02-11 | 2014-05-07 | 国家纳米科学中心 | Structural wave-absorbing material and manufacturing method thereof |
| US20170222310A1 (en) * | 2016-01-29 | 2017-08-03 | Lisa Draexlmaier Gmbh | Radome |
| US20170358855A1 (en) * | 2014-12-02 | 2017-12-14 | Commscope Technologies Llc | Antenna radome with absorbers |
| CN207967308U (en) * | 2018-01-17 | 2018-10-12 | 华域汽车***股份有限公司 | A kind of wide angle antenna house and antenna assembly suitable for vehicle-mounted millimeter wave radar |
-
2018
- 2018-01-17 CN CN201810046004.1A patent/CN108400440A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007235287A (en) * | 2006-02-28 | 2007-09-13 | Hitachi Ltd | Vehicle-mounted electromagnetic wave radar |
| CN103779667A (en) * | 2014-02-11 | 2014-05-07 | 国家纳米科学中心 | Structural wave-absorbing material and manufacturing method thereof |
| US20170358855A1 (en) * | 2014-12-02 | 2017-12-14 | Commscope Technologies Llc | Antenna radome with absorbers |
| US20170222310A1 (en) * | 2016-01-29 | 2017-08-03 | Lisa Draexlmaier Gmbh | Radome |
| CN207967308U (en) * | 2018-01-17 | 2018-10-12 | 华域汽车***股份有限公司 | A kind of wide angle antenna house and antenna assembly suitable for vehicle-mounted millimeter wave radar |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114096878A (en) * | 2019-06-28 | 2022-02-25 | 株式会社电装 | Radar apparatus |
| CN111446547A (en) * | 2020-05-25 | 2020-07-24 | 上海载德信息科技股份有限公司 | Antenna housing and millimeter wave radar device |
| CN113009474A (en) * | 2021-02-09 | 2021-06-22 | 北京算丰征途科技有限公司 | Large-range high-resolution millimeter wave radar antenna and system for detecting human body posture |
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