CN110474164A - A kind of vehicle-mounted millimeter wave broad-band chip integrated waveguide slot antenna - Google Patents
A kind of vehicle-mounted millimeter wave broad-band chip integrated waveguide slot antenna Download PDFInfo
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- CN110474164A CN110474164A CN201910751721.9A CN201910751721A CN110474164A CN 110474164 A CN110474164 A CN 110474164A CN 201910751721 A CN201910751721 A CN 201910751721A CN 110474164 A CN110474164 A CN 110474164A
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- integrated waveguide
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- waveguide slot
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- 238000005530 etching Methods 0.000 claims abstract description 6
- 230000010354 integration Effects 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 15
- 238000013461 design Methods 0.000 description 9
- 238000005259 measurement Methods 0.000 description 4
- 206010039203 Road traffic accident Diseases 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VIKNJXKGJWUCNN-XGXHKTLJSA-N norethisterone Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](C)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 VIKNJXKGJWUCNN-XGXHKTLJSA-N 0.000 description 2
- 230000008447 perception Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
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- 238000000926 separation method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
- H01Q13/106—Microstrip slot antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
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- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The present invention relates to a kind of vehicle-mounted millimeter wave broad-band chip integrated waveguide slot antennas, including etching face battle array structure, matching network and microstrip power divider on pcb board, the face battle array structure includes the identical linear array structure of multiple structures, and multiple linear array structures are connected in parallel after connecting respectively with a matching network with the microstrip power divider;The linear array structure includes the feeder line connecting with the matching network and multiple radiators for being arranged on the feeder line.Antenna of the invention is by etching multiple radiators, feeder line, matching network and microstrip power divider on the same face of a pcb board, convenient for connection, so that the size of the antenna reduces so that its meet high-gain, narrow beam, Sidelobe, ultra wide band performance requirement.
Description
Technical field
The present invention relates to antenna technical fields, more particularly to a kind of vehicle-mounted millimeter wave broad-band chip integrated waveguide slot day
Line.
Background technique
In recent years, along with the rapid growth of China's economy, automobile quantity is significantly increased, etesian traffic accident with
And the property loss that accident causes also is sharply increasing.How to allow people enjoy automobile offer convenience to life while reduction
Traffic accident, improving vehicle safety and reliability, oneself is become being primarily upon for major automobile vendor and consumer
Point.Automobile collision avoidance radar is that one kind can temporarily be intervened with early warning or directly to the operation of driver, is tried to avert accidents
Automobile assistant driving system can significantly increase the safety of vehicle.Compared with 24GHz radar, 77GHz millimetre-wave radar is not only
Power margin is larger, and available bandwidth is big, and resolution ratio with higher and angle measurement accuracy, now has become major automobile vendor
Research hotspot, have vast potential for future development.
Currently, vehicle-mounted 77GHz millimetre-wave radar development cost is relatively high, most products are mainly used in medium-to-high grade sedan-chair
Vehicle is not popularized in low and middle-grade vehicles.Therefore, when keeping millimetre-wave radar performance, millimeter wave thunder how is further decreased
The price reached is just particularly important.Secondly as millimetre-wave radar is mostly installed in vehicle front or front bumper, so
It is stringent to the volume size limitation of radar.For performances such as the gains that meets vehicle-mounted millimeter wave radar antenna, then in millimeter wave
In the restricted situation of radar radio frequency chip transmission power, the effective way for increasing antenna gain necessarily increases the radiation of antenna
Bore.Obviously, the gain of balancing antenna and size are the technological difficulties of current millimetre-wave radar Antenna Design.And in 77GHz vapour
In the perception of vehicle Anticollision Radar peripheral information, it is desirable that Automobile Millimeter Wave Radar antenna beam can satisfy 120 ° of even greater angle and cover
The requirement of lid, and the beam angle of current micro-strip antenna array is difficult to meet the requirements, and therefore, designs the millimeter wave with broad beam
Aerial array is also to require technological difficulties in current millimetre-wave radar Antenna Design.Meanwhile when millimetre-wave radar Antenna Operation,
Minor level will cause signal-to-noise ratio decline, to influence detection range and detection accuracy, therefore Sidelobe is designed to current milli
Another technological difficulties in metre wave radar design.
Under the premise of guaranteeing millimetre-wave radar ranging and angle measurement, radar precision, target resolution how are improved,
It is current urgent problem.Therefore, sight has been invested 79GHz millimetre-wave radar by entire industry.General 77GHz radar
Bandwidth is 500-1000MHz or so, but compared with the 4GHz bandwidth of operation of 79GHz radar, the target separation accuracy of 77GHz radar
It is decimeter grade, and the target resolving accuracy of 79GHz radar is Centimeter Level;It is smaller to also mean that 79GHz radar can measure
Target.Currently, entire industry is all put into a large amount of research all in 77GHz, but also there is certain investment in 79GHz, but at present
As Bosch, Delphi, continent etc. all has mature product in 77GHz.But it there is no mature technology scheme and production at present in 79GHz
Product.Therefore, the bandwidth of operation of radar antenna how is improved, and the technological difficulties of millimetre-wave radar Antenna Design at present.
Summary of the invention
The present invention is to overcome the shortcomings of described in the above-mentioned prior art, provides a kind of vehicle-mounted millimeter wave broad-band chip integrated waveguide
Slot antenna, working frequency can cover 77-81GHz, can be applied to 77GHz and 79GHz Automobile Millimeter Wave Radar.
In order to solve the above technical problems, technical scheme is as follows:
A kind of vehicle-mounted millimeter wave broad-band chip integrated waveguide slot antenna, including etch on pcb board a face battle array structure,
Distribution network and microstrip power divider, the face battle array structure include the identical linear array structure of multiple structures, multiple linear array structures point
It is connected in parallel after not connect with a matching network with the microstrip power divider;The linear array structure includes and the matching
The feeder line of network connection and the multiple radiators being arranged on the feeder line.
Further, as optimal technical scheme, multiple radiators it is of same size, the length of the radiator from
Centre successively gradually becomes smaller to both sides.
Further, as optimal technical scheme, central axis distance of the radiator apart from the feeder line is therefrom
Between successively gradually become smaller to both sides.
Further, as optimal technical scheme, the quantity of the radiator is at least 3.
Further, as optimal technical scheme, the quantity of the radiator is 8-16.
Further, as optimal technical scheme, the quantity of the linear array structure is at least 3.
Further, it as optimal technical scheme, is connected on the microstrip power divider and the linear array structure quantity
Identical impedance transformer network.
Further, it as optimal technical scheme, is connected on the microstrip power divider and the linear array structure quantity
Identical impedance transformer network and phase adjustment network;The phase adjustment network is connect with the matching network.
Further, as optimal technical scheme, the radiator is chip integrated waveguide slot oscillator.
Further, as optimal technical scheme, the feeder line is substrate integration wave-guide.
Compared with prior art, the beneficial effect of technical solution of the present invention is:
Antenna of the invention is by etching multiple radiators, feeder line, matching network and microstrip power divider in the same of a pcb board
On face, convenient for connection, so that the size of the antenna reduces, so that it meets high-gain, narrow beam, Sidelobe, ultra wide band
Performance requirement;It may also be combined with phase adjustment network simultaneously, design is applied to the aerial array of different scenes.
Detailed description of the invention
Fig. 1 is linear array structure schematic diagram of the present invention.
Fig. 2 is that micro-strip function of the present invention divides feed structure schematic diagram.
Fig. 3 is battle array structural schematic diagram in face of the present invention.
Fig. 4 is that the present invention adds the micro-strip function of phase adjustment network to divide feed structure schematic diagram.
Fig. 5 is the face battle array structural schematic diagram of present invention load phase adjustment network.
Fig. 6 is gain direction analogous diagram of the invention.
Fig. 7 is standing wave analogous diagram of the invention.
Fig. 8 is standing wave analogous diagram of the invention.
Fig. 9 is the gain direction analogous diagram of present invention load phase adjusted structure.
Figure 10 is the standing wave analogous diagram of present invention load phase adjusted structure.
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent;In order to better illustrate this embodiment, attached
Scheme certain components to have omission, zoom in or out, does not represent the size of actual product;To those skilled in the art,
The omitting of some known structures and their instructions in the attached drawings are understandable;The same or similar label corresponds to same or similar
Component;The terms describing the positional relationship in the drawings are only for illustration, should not be understood as the limitation to this patent.
Specific embodiment
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawing, so that advantages and features of the invention are more
It is easily readily appreciated by one skilled in the art, to make apparent define to protection scope of the present invention.
Embodiment 1
A kind of vehicle-mounted millimeter wave broad-band chip integrated waveguide slot antenna, as shown in Figs. 1-3: including etching one on pcb board
A face battle array structure, matching network 3 and microstrip power divider 4, face battle array structure includes the identical linear array structure of multiple structures, multiple linear arrays
Structure is connected in parallel after connecting respectively with a matching network 3 with microstrip power divider 4;Linear array structure includes connecting with matching network 3
The feeder line 2 connect and the multiple radiators 1 being arranged on feeder line 2.Wherein, multiple radiators 1 of same size, the length of radiator 1
Degree successively gradually becomes smaller from centre to both sides;Central axis distance of the radiator 1 apart from feeder line 2 from centre to both sides successively by
Gradual change is small;Impedance transformer network 5 identical with linear array structure quantity is connected on microstrip power divider 4.
In the present embodiment, the quantity of radiator 1 is at least 3, it is preferred that the quantity of radiator 1 is 8-16;Linear array
The quantity of structure is at least 3.
Such as: the antenna of the present embodiment includes m × n radiator 1, approximately the same plane of the m × n radiator 1 in pcb board
One face battle array structure of interior etching, every m radiator 1 are composed in series a linear array structure by feeder line 2, and n linear array structure is in parallel
At a face battle array structure;Each linear array structure is in parallel with 1 point of n microstrip power divider 4 after connecting with a matching network 3 to be connected
It connects;Wherein m, n are the natural number greater than 0;M, the n for having choosing are the natural number more than or equal to 3.
In the present embodiment, m=16, n=10, i.e. face battle array structure include 10 linear array structures, and each linear array structure has 16
A radiator 1, therefore, microstrip power divider 4 are one point of ten microstrip power divider 4, in conjunction with feeder line 2 and matching network 3, made day
Linear dimension is only 28mm × 33mm, and each linear array structure, matching network 3 and microstrip power divider 4 are respectively positioned on same plane convenient for connecting
It connects.This design is applied to 77GHz millimeter wave broadband chip integrated waveguide slot antenna, simulation result as shown in fig. 6-7, leads to
Cross Fig. 6 without phase adjusted structure when gain direction analogous diagram it is found that the antenna simulated gain of the present embodiment reaches
The face 25.1dBi, E 3dB beam angle is ± 5.8 °, and the face H 3dB beam angle reaches ± 5.2 °, meets minor level inhibition and is greater than
17dBc meets high-gain, narrow beam, the performance requirement of Sidelobe;Meanwhile the standing wave analogous diagram for passing through Fig. 7, it is known that 76.3 ~
77GHz band standing internal wave is superior to -10dB, and is better than -9.5dB in the bandwidth standing internal wave ratio of 75.3 ~ 77GHz.
Meanwhile in the present invention, the length of radiator 1 can be adjusted according to the bandwidth of operation of required antenna, then
In conjunction with matching network 3 and microstrip power divider 4, the aerial array of wide band high-gain can be designed, this design is such as applied to 79GHz milli
In metric wave broad-band chip integrated waveguide slot antenna, the standing-wave ratio pair of the 79GHz broad-band chip integrated waveguide linear array and face battle array
Than schematic diagram as shown in figure 8, its bandwidth of operation can cover 77-81GHz, and it is applied in radar and can further improve thunder
The distance and target resolution reached.And radiator 1 in the implementation case, feeder line 2, matching network 3, microstrip power divider 4 can be with
Forming is etched on same pcb board.
Embodiment 2
Based on embodiment 1, as illustrated in figures 4-5: being connected with impedance identical with linear array structure quantity simultaneously on microstrip power divider 4
Converting network 5 and phase adjustment network 6;Phase adjustment network 6 is connect with matching network 3.This design is applied to 77GHz millimeters
Wave broad-band chip integrated waveguide slot antenna, simulation result as shown in figs. 9-10, by Fig. 9 gain direction analogous diagram it is found that
The antenna simulated gain of the present embodiment reaches 21dBi, and the face E 3dB beam angle is ± 5.8 °, and the face H 3dB beam angle reaches
102.3 °, 6dB beam angle can achieve 136 °, and beam angle and gain can not only meet the survey of the closely middle long distance of car radar
The gain requirement of examination, and car radar can be met in the requirement of peripheral information perception wide-angle wave cover;Such as Figure 10 wave
Analogous diagram is it is found that the present embodiment is superior to -15dB in 75 ~ 78GHz band standing internal wave.
In the present invention, radiator 1 is chip integrated waveguide slot oscillator, and feeder line 2 is substrate integration wave-guide.
Microstrip power divider 4, matching network 3 and each linear array structure are placed in approximately the same plane by the present invention constitutes face battle array knot
Structure facilitates production, reduces processing cost;The size of radiator 1 in each linear array structure is successively gradually become smaller from centre to both sides,
And the characteristics of due to feeder line 2,1 spacing of radiator become smaller, and reduce the size of antenna, while improving the secondary lobe of face battle array structure
Level, and then the angle measurement accuracy of vehicle-mounted millimeter wave radar can be improved;Finally, increasing phase adjustment network in antenna plane structure
6, the beam angle of antenna can be promoted, so that radar antenna is met varying environment and tests the speed and angle measurement requirement with scene.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (10)
1. a kind of vehicle-mounted millimeter wave broad-band chip integrated waveguide slot antenna, which is characterized in that including etching one on pcb board
A face battle array structure, matching network (3) and microstrip power divider (4), the face battle array structure includes the identical linear array structure of multiple structures,
Multiple linear array structures are connected in parallel after connecting respectively with a matching network (3) with the microstrip power divider (4);Institute
State multiple radiators that linear array structure includes the feeder line (2) connecting with the matching network (3) and is arranged on the feeder line (2)
(1).
2. vehicle-mounted millimeter wave broad-band chip integrated waveguide slot antenna according to claim 1, which is characterized in that Duo Gesuo
The of same size of radiator (1) is stated, the length of the radiator (1) successively gradually becomes smaller from centre to both sides.
3. vehicle-mounted millimeter wave broad-band chip integrated waveguide slot antenna according to claim 1, which is characterized in that the spoke
Central axis distance of the beam (1) apart from the feeder line (2) successively gradually becomes smaller from centre to both sides.
4. vehicle-mounted millimeter wave broad-band chip integrated waveguide slot antenna according to claim 1, which is characterized in that the spoke
The quantity of beam (1) is at least 3.
5. vehicle-mounted millimeter wave broad-band chip integrated waveguide slot antenna according to claim 4, which is characterized in that the spoke
The quantity of beam (1) is 8-16.
6. vehicle-mounted millimeter wave broad-band chip integrated waveguide slot antenna according to claim 1, which is characterized in that the line
The quantity of battle array structure is at least 3.
7. vehicle-mounted millimeter wave broad-band chip integrated waveguide slot antenna according to claim 1, which is characterized in that described
Impedance transformer network (5) identical with the linear array structure quantity is connected on microstrip power divider (4).
8. vehicle-mounted millimeter wave broad-band chip integrated waveguide slot antenna according to claim 1, which is characterized in that described
Impedance transformer network (5) identical with the linear array structure quantity and phase adjustment network are connected on microstrip power divider (4)
(6);The phase adjustment network (6) connect with the matching network (3).
9. vehicle-mounted millimeter wave broad-band chip integrated waveguide slot antenna according to claim 1, which is characterized in that the spoke
Beam (1) is chip integrated waveguide slot oscillator.
10. vehicle-mounted millimeter wave broad-band chip integrated waveguide slot antenna according to claim 1, which is characterized in that described
Feeder line (2) is substrate integration wave-guide.
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Cited By (2)
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CN111834742A (en) * | 2020-06-08 | 2020-10-27 | 惠州市德赛西威智能交通技术研究院有限公司 | Vehicle-mounted millimeter wave radar array antenna |
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