CN108983241A - The hybrid circuit board of 77GHZ millimeter wave ADAS radar - Google Patents
The hybrid circuit board of 77GHZ millimeter wave ADAS radar Download PDFInfo
- Publication number
- CN108983241A CN108983241A CN201811145730.5A CN201811145730A CN108983241A CN 108983241 A CN108983241 A CN 108983241A CN 201811145730 A CN201811145730 A CN 201811145730A CN 108983241 A CN108983241 A CN 108983241A
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- Prior art keywords
- layer
- circuit board
- radar
- millimeter wave
- antenna
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
- G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0296—Conductive pattern lay-out details not covered by sub groups H05K1/02 - H05K1/0295
- H05K1/0298—Multilayer circuits
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The present invention relates to the hybrid circuit board of 77GHZ millimeter wave ADAS radar, circuit board includes three pieces of substrates, two layers of bonding sheet, passes through two layers of bonding sheet in intermediate substrate in three pieces of substrates and one is made in the pressing of other two pieces of substrates.Three pieces of substrates are set as six layers from top to bottom in circuit board；First layer is antenna surface, and radio frequency chip and antenna is arranged；The second layer for antenna, complete radio frequency is provided for antenna surface；Third layer is bus plane；4th layer is signals layer, and uniform fold has the control line and sensitive signal cabling of radar DSP signal processing；Layer 5 is signal stratum, and third layer is isolated in multilager base plate；Layer 6 is DSP and auxiliary circuit device layout layer, for being distributed the component of radar.The present invention realizes whole ADAS radar function using one piece of circuit board, and by the Highgrade integration to the front end portion RF and the processing of DSP back end signal, Radar Design cost is greatly lowered, simplifies assembly technology, improves the reliability of radar.
Description
Technical field
The present invention relates to automotive electronics Radar Technology fields, specifically the mixing collection of 77GHZ millimeter wave ADAS radar
At circuit board.
Background technique
Automobile active safety auxiliary system, abbreviation ADAS application in, 77GHZ millimetre-wave radar is main core probe portion
Irreplaceable sensor in part and intelligent driving automobile and from now on pilotless automobile industry.
ADAS radar emits hundreds of MHZ wideband frequencies using sawtooth is swept fastly, by mentioning with target echo coherent reception mode
Take the distance and speed signal of target.Radar Design difficult point is to maintain the coverage area and resolution ratio of aerial angle.ADAS radar
Mechanical scanning is done using radar antenna is not received.Target angle can only be detected using digital bea mforming DBF method.Due to price
The number of the practical receiver of reason is limited.Signal processing improves angle detection essence using synthetic aperture smoothing technique to single goal
Exactness.Or angular resolution is improved using MIMO multiple-input multiple-output technology to multiple target.It is namely logical with limited physical receipt
Road expands virtual reception array element number by time slot.If radio frequency sending set number is m, receiver number is n.It can obtain
Multiply that n receiving channel does DBF and SAR is smooth to m.Angle is greatly improved under conditions of meeting angle covering and price limit
Spend detection resolution.
77GHZ radar only has business card size, receives in radar in m transmitting n, that is, mTnR radar chip needs m+n
Antenna.Antenna complex and mutual coupled interference is larger, radar DSP needs n digital receiving channel, and (hardware is typically
ADC, software typical case are FFT) change process.Powerful embedded processing chip and enough memories is needed to meet at signal
Reason.The high performance power converting circuit of several levels is needed simultaneously.In the CAN communication circuit and necessary driving circuit of automobile application,
It is referred to as auxiliary circuit.
Currently, the 77GHZ radar of the international colleague of volume production uses muti-piece board design, RF antenna part and DSP are believed
Number processing part, some also separates power converting circuit in different circuit boards, this needs entire 77GHZ radar at least
Two pieces are wanted perhaps to be interconnected between two pieces or more of circuit board circuit board by plug or patch cables, so that make radar can
It is reduced by property, increases the difficulty of volume production.
Summary of the invention
In order to avoid with solve above-mentioned technical problem, the invention proposes the hybrid integrateds of 77GHZ millimeter wave ADAS radar
Circuit board.
The technical problems to be solved by the invention are realized using following technical scheme:
The hybrid circuit board of 77GHZ millimeter wave ADAS radar is complete by the functional unit of 77GHZ millimeter wave ADAS radar
Portion's hybrid integrated is on one piece of circuit board.
Further, the circuit board includes three pieces of substrates, two layers of bonding sheet, the base in centre in three pieces of substrates
One is made by two layers of bonding sheet and the pressing of other two pieces of substrates in plate.
Further, three pieces of substrates are set as six layers from top to bottom in the circuit board；
First layer is antenna surface, and radio frequency chip and antenna is arranged；
The second layer for antenna, complete radio frequency is provided for antenna surface；
Third layer is bus plane；
4th layer is signals layer, and uniform fold has the control line and sensitive signal cabling of radar DSP signal processing；
Layer 5 is signal stratum, and third layer is isolated in multilager base plate；
Layer 6 is DSP and auxiliary circuit device layout layer, for being distributed the component of radar.
Further, the radio frequency chip on the antenna surface and multi-antenna array co-planar arrangement, and additional decoupling antenna is with reality
Existing feeder line is the same as mutually decoupling.
Further, setting signal handles chip on the layer 6, and the signal processing chip and radio frequency chip are shared
One piece of clock guarantees to receive system coherence.
Further, the substrate between the first layer and the second layer is made of high frequency plate.
Further, the third layer to the substrate between layer 6 is all made of FR-4 plate and is made.
Further, it is asymmetric mixed-compression board that the substrate, which is all made of,.
The beneficial effects of the present invention are:
1, the present invention realizes whole ADAS radar function using one piece of circuit board, by the front end portion RF and the rear end DSP
Radar Design cost is greatly lowered in the Highgrade integration of signal processing, simplifies assembly technology, improves the reliability of radar.
2, the present invention can be reduced the interference between each function, be evaded because of component placement by reasonable power supply, circuit layout
Density it is excessive and caused by electromagnetic compatibility problem, the integrated level of radar system is greatly improved, effectively meets increasingly harsh sensing
Device miniature requirement.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the schematic diagram of first layer antenna surface in circuit board of the present invention；
Fig. 3 is the schematic diagram of the second layer and layer 5 in circuit board of the present invention；
Fig. 4 is the schematic diagram of third layer bus plane in circuit board of the present invention；
Fig. 5 is the schematic diagram of the 4th layer signal layer in circuit board of the present invention；
Fig. 6 is the schematic diagram of layer 6 DSP and auxiliary circuit device layout layer in circuit board of the present invention.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below it is right
The present invention is further described.
As shown in Figures 1 to 6, the hybrid circuit board of 77GHZ millimeter wave ADAS radar, by 77GHZ millimeter wave ADAS
The functional unit whole hybrid integrated of radar is on one piece of circuit board.
The circuit board includes three pieces of substrates 1, two layers of bonding sheet 2, is led in three pieces of substrates 1 in intermediate substrate 1
It crosses two layers of bonding sheet 2 and one is made in the pressing of other two pieces of substrates 1.
Three pieces of substrates 1 are set as six layers from top to bottom in the circuit board；
First layer 11 is antenna surface, radio frequency chip and antenna is arranged, as shown in Fig. 2, illustrating radio circuit and multichannel day
The distribution of line；
The second layer 12 for antenna, with providing complete radio frequency for antenna surface, that is, meets Antenna Design requirement, also provides and penetrate
The metallic shield of frequency and radar return frequency, as shown in figure 3, illustrating the distribution on radio frequency ground；
Third layer 13 is bus plane, and being placed between the second layer 12 and the 4th layer 14 by bus plane is to inhibit by DCDC
The switching frequency that power supply generates is radiated space, exceeded so as to cause electromagnetic radiation, works other elements and generates interference, such as schemes
Shown in 4, the distribution of power circuit is illustrated；
4th layer 14 is signals layer, and uniform fold has the control line and sensitive signal cabling of radar DSP signal processing, is such as schemed
Shown in 5, the distribution of the signal control circuit of signals layer is illustrated；
Layer 5 15 is signal stratum, and third layer 13 can be isolated in inside multi-layer board, avoids other external electromagnetic radiation
Signal is interfered, the anti-interference ability of radar is improved, as shown in figure 3, illustrate publicly, the distribution of signal ground；
Layer 6 16 is DSP and auxiliary circuit device layout layer, for being distributed the component of radar, the big portion of entire radar
Subelement is all distributed in the layer, carries out reasonable Layout by all elements to this layer, reduces between each functional unit
It interferes with each other, reaches the design requirement of radar, as shown in fig. 6, illustrating the distribution of DSP and auxiliary circuit.
Radio frequency chip and multi-antenna array co-planar arrangement on the antenna surface, and additional decoupling antenna 3 and radio frequency feed line 4
After matching, to realize feeder line with mutually decoupling, reference can be made to Fig. 2.
When setting signal handles chip, the signal processing chip and one piece shared radio frequency chip on the layer 6 16
Clock guarantees to receive system coherence.
Substrate between the first layer 11 and the second layer 12 needs the high frequency of dedicated two sides laying copper foil using 77GHZ
Plate.
The third layer 13 to the substrate between layer 6 16 is all made of FR-4 plate and is made.
It is asymmetric mixed-compression board that the substrate, which is all made of, and traditional mixed-compression board uses asymmetric materials, that is, layer 5 15,
Layer 6 16 should be expensive high frequency plate, and price ratio FR-4 plate is 40 times high at present, be used by structure design asymmetric mixed
Pressing plate can significantly save cost.
In conclusion the present invention realizes whole ADAS radar function using one piece of circuit board, by the front end portion RF with
The Highgrade integration of DSP back end signal processing, is greatly lowered Radar Design cost, simplifies assembly technology, and that improves radar can
By property；By reasonable power supply, circuit layout, the interference between each function can be reduced, is evaded due to component placement density is excessive
Caused by electromagnetic compatibility problem, the integrated level of radar system is greatly improved, effectively meets increasingly harsh sensor miniaturization need
It asks.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and what is described in the above embodiment and the description is only the present invention
Principle, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these variation and
Improvement is both fallen in claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (8)
- The hybrid circuit board of 1.77GHZ millimeter wave ADAS radar, it is characterised in that: by 77GHZ millimeter wave ADAS radar Functional unit whole hybrid integrated is on one piece of circuit board.
- 2. the hybrid circuit board of 77GHZ millimeter wave ADAS radar according to claim 1, it is characterised in that: described Circuit board includes the substrate of three blocks of two-sided paving copper foils, two layers of bonding sheet, and the substrate in centre passes through two in three pieces of substrates One is made in layer bonding sheet and the pressing of other two pieces of substrates.
- 3. the hybrid circuit board of 77GHZ millimeter wave ADAS radar according to claim 2, it is characterised in that: described Three pieces of substrates are set as six layers from top to bottom in circuit board；First layer is antenna surface, and radio frequency chip and antenna is arranged；The second layer for antenna, complete radio frequency is provided for antenna surface；Third layer is bus plane；4th layer is signals layer, and uniform fold has the control line and sensitive signal cabling of radar DSP signal processing；Layer 5 is signal stratum, and third layer is isolated in multilager base plate；Layer 6 is DSP and auxiliary circuit device layout layer, for being distributed the component of radar.
- 4. the hybrid circuit board of 77GHZ millimeter wave ADAS radar according to claim 3, it is characterised in that: described Radio frequency chip and multi-antenna array co-planar arrangement on antenna surface, and additional decoupling antenna is to realize that feeder line is decoupled with phase.
- 5. the hybrid circuit board of 77GHZ millimeter wave ADAS radar according to claim 3, it is characterised in that: described Setting signal handles chip on layer 6, and the signal processing chip and radio frequency chip share one piece of clock, guarantee reception system Coherence.
- 6. the hybrid circuit board of 77GHZ millimeter wave ADAS radar according to claim 3, it is characterised in that: described Substrate between first layer and the second layer is made of high frequency plate.
- 7. the hybrid circuit board of 77GHZ millimeter wave ADAS radar according to claim 3, it is characterised in that: described Third layer to the substrate between layer 6 is all made of FR-4 plate and is made.
- 8. the hybrid circuit board of 77GHZ millimeter wave ADAS radar according to claim 3, it is characterised in that: described It is asymmetric mixed-compression board that substrate, which is all made of,.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811145730.5A CN108983241A (en) | 2018-09-29 | 2018-09-29 | The hybrid circuit board of 77GHZ millimeter wave ADAS radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811145730.5A CN108983241A (en) | 2018-09-29 | 2018-09-29 | The hybrid circuit board of 77GHZ millimeter wave ADAS radar |
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| Publication Number | Publication Date |
|---|---|
| CN108983241A true CN108983241A (en) | 2018-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811145730.5A Pending CN108983241A (en) | 2018-09-29 | 2018-09-29 | The hybrid circuit board of 77GHZ millimeter wave ADAS radar |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110794372A (en) * | 2019-11-12 | 2020-02-14 | 长沙莫之比智能科技有限公司 | Millimeter wave radar and unmanned aerial vehicle multi-target height measurement method based on millimeter wave radar |
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2018
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| US20020171141A1 (en) * | 2001-05-21 | 2002-11-21 | Xytrans, Inc. | Millimeter wave (MMW) transceiver module with transmitter, receiver and local oscillator frequency multiplier surface mounted chip set |
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Cited By (1)
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|---|---|---|---|---|
| CN110794372A (en) * | 2019-11-12 | 2020-02-14 | 长沙莫之比智能科技有限公司 | Millimeter wave radar and unmanned aerial vehicle multi-target height measurement method based on millimeter wave radar |
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