CN207851289U - For automobile active anticollision millimetre-wave radar system - Google Patents
For automobile active anticollision millimetre-wave radar system Download PDFInfo
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- CN207851289U CN207851289U CN201820348231.5U CN201820348231U CN207851289U CN 207851289 U CN207851289 U CN 207851289U CN 201820348231 U CN201820348231 U CN 201820348231U CN 207851289 U CN207851289 U CN 207851289U
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Abstract
Small, good directionality that the utility model discloses a kind of sizes, array element is few, high yield rate, high gain, while at low cost, and easy of integration is used for automobile active anticollision millimetre-wave radar system.The system includes dual-mode antenna module,RF receiving and transmission module,Data processing module,Power supply,Dual-mode antenna module is that 24GHz microstrip array receives and dispatches reciprocity antenna,It is improved by the antenna to dual-mode antenna module,So that improved antenna size is small,Aerial array deflection is 16 degree,Pitch angle is 6 degree,Good directionality,The antenna array elements being made of 6*14 bay are few,Improve yield rate,Improve gain,By verification experimental verification on 24GHz~24.25GHz frequency domains,Reach 25dB or more,It is at low cost simultaneously,It is easy of integration,Meet automobile active anti-collision radar system and wants high about transmission power,Power consumption wants low,Wave beam wants narrow,The remote requirement of investigative range,Reduce array surface standing wave simultaneously,Force down secondary lobe (Sidelobe Suppression is more than 16~25dB),Improve receive-transmit isolation.
Description
Technical field
The utility model is related to radar system fields, especially a kind of to be used for automobile active anticollision millimetre-wave radar system.
Background technology
In recent years, traffic problems have become and influence one of socio-economic development and people's lives safety and great ask
Topic.In order to effectively reduce traffic accident rate and protection personal safety.Since 1971, occurred in succession
The active automobile anti-collision system of the various ways such as ultrasonic wave, laser, infrared, microwave, but above anti-collision system all has one
A little shortcomings, such as can be influenced by weather, ranging is short, of high cost.Therefore fail the large-scale popularization application on automobile.It is subsequent again
Using measures such as driving safety band, air bags, but these defensive measures are Passive Defences, cannot fundamentally solve to ask
Topic.Millimetre-wave radar has many advantages, such as high-resolution, low-power consumption, small size and almost round-the-clock ability to work.Utilize millimeter
Active Anticollision Radar of the wave radar as automobile can be effectively reduced the probability of traffic accident generation, be carried being widely used in
In the safety of high vehicle.
Existing millimetre-wave radar system includes dual-mode antenna module, RF receiving and transmission module, data processing module, power supply electricity
Source, the dual-mode antenna module, data processing module are connected with RF receiving and transmission module respectively, the RF receiving and transmission module, data
Processing module is electrically connected with power supply respectively, and existing millimetre-wave radar system has the following problems in use：It is first
First, the dual-mode antenna module of existing millimetre-wave radar system is mostly to use microstrip antenna, existing millimetre-wave radar system
The generous tropism of microstrip antenna size used is poor, and array element is more, and yield rate is relatively low, and gain is not also high, while cost is higher, is not easy
It is integrated, cause existing millimetre-wave radar expensive, can not popularization and application to low and middle-grade vehicles, how to reduce its cost,
Best compromise is found among performance and price becomes main problem urgently to be resolved hurrily；Secondly, although having proposed in recent decades
A variety of methods are for improving detectivity, the accuracy of resolution ratio and parameter Estimation of the radar when detecting target, such as Han J
Et al. propose using road boundary and using optical detection disorder detection method in downward direction, but in unit average constant false alarm
In early warning, prediction probability usually can cause pre- alarm probability seriously to be degenerated because of the interference of a unit, although these algorithms can be with
It realizes millimetre-wave radar early warning, but higher stability is realized while there is no guarantee that inexpensive.
Utility model content
Small, good directionality that the technical problem to be solved by the utility model is to provide a kind of sizes, array element is few, yield rate
Height, high gain, and meanwhile it is at low cost, easy of integration is used for automobile active anticollision millimetre-wave radar system.
Technical solution adopted by the utility model to solve its technical problems is：This is used for automobile active anticollision millimeter wave thunder
Up to system, including dual-mode antenna module, RF receiving and transmission module, data processing module, power supply, the dual-mode antenna module,
Data processing module is connected with RF receiving and transmission module respectively, and the RF receiving and transmission module, data processing module are electric with power supply respectively
Source is electrically connected, and the dual-mode antenna module is that 24GHz microstrip array receives and dispatches reciprocity antenna, and the 24GHz microstrip array transmitting-receiving is mutual
Easy antenna includes two reception antennas and a transmitting antenna, two reception antennas and a transmitting antenna respectively with radio-frequency receiving-transmitting
Module is connected, and two reception antennas and a transmitting antenna are made of the aerial array that 6*14 bay is constituted, each
Bay includes earth plate, dielectric substrate, radiation patch and feeder line；The upper table in earth plate is arranged in the dielectric substrate
Face, the radiation patch are arranged at the upper surface center of dielectric substrate, and it is recessed that a side end face of the radiation patch is provided with rectangle
Slot, the feeder line are arranged in the upper surface of dielectric substrate, and one end of the feeder line extends to the bottom of rectangular recess, the feeder line
The other end extend to a side end face of dielectric substrate.
Further, the radiation patch, earth plate, dielectric substrate are rectangle, the side of the radiation patch with
The side of dielectric substrate is parallel to each other, and the dielectric substrate thickness h=λ, λ are individual antenna array element operation wavelength；The radiation
The width of patch is W, length L, and the depth of the feed of radiation patch is I, the I=L/3, describedInstitute
It statesWherein
f0For the resonant frequency of dielectric substrate, c is the light velocity, εrFor the dielectric constant of dielectric substrate；H is dielectric substrate thickness.
Further, the aerial array deflection is 16 degree, pitch angle is 6 degree.
Further, the data processing module includes signal acquisition circuit, DDS chips, fpga chip, the signal
Acquisition Circuit includes gain-programmed amplifier and ADC chips, and the gain-programmed amplifier is connected with ADC chips, the ADC cores
Piece, DDS chips are connected with fpga chip respectively, and the fpga chip is electrically connected with power supply, the fpga chip and radio frequency
Transceiver module is connected.
Further, further including RS232 interface circuit, the RS232 interface circuit is connected with fpga chip.
Further, the RF receiving and transmission module includes radiating circuit and receiving circuit；The radiating circuit includes lock
Phase frequency synthesizer, low-pass filter, frequency divider, voltage-controlled oscillator (VCO), the first power divider, the second power divider, power
Amplifier, power frequency multiplier, the input terminal of the frequency synthesizer of phase locking are connected with fpga chip, the frequency synthesizer of phase locking
Output end be connected respectively with the input terminal of the input terminal of low-pass filter, frequency divider, the output end of the low-pass filter, point
The output end of frequency device is connected with the input terminal of voltage-controlled oscillator (VCO) respectively, the output end of the voltage-controlled oscillator (VCO) and the first power distribution
Device is connected, and the output end of first power divider is connected with power amplifier, the second power divider respectively, the power
The output end of amplifier is connected with the input terminal of power frequency multiplier, and the output end of the power frequency multiplier is connected with transmitting antenna；
The receiving circuit includes low-noise amplifier, third power divider, the 4th power divider, the first phase shifter, the second shifting
Phase device, the first frequency mixer, the second frequency mixer, the first frequency-selective amplifier, the second frequency-selective amplifier, the first R4 filters, the 2nd R4
The input terminal of filter, the low-noise amplifier is connected with reception antenna, the output end of the low-noise amplifier and the 4th
The input terminal of power divider is connected, and the output end of the 4th power divider is mixed with the input terminal of the first phase shifter, second respectively
The input terminal of frequency device is connected, and the output end of the first phase shifter is connected with the input terminal of the first frequency mixer, third power divider
Input terminal is connected with the output end of the second power divider, and the output end of third power divider is defeated with the first frequency mixer respectively
Enter end, the second phase shifter input terminal be connected, the output end of second phase shifter is connected with the output end of the second frequency mixer, institute
The output end for stating the first frequency mixer is connected with the input terminal of the first frequency-selective amplifier, the output end of the first frequency-selective amplifier and first
The input terminal of R4 filters is connected, and the output end of second frequency mixer is connected with the input terminal of the second frequency-selective amplifier, and second
The output end of frequency-selective amplifier is connected with the input terminal of the 2nd R4 filters, the output end of the 2nd R4 filters, the first R4 filtering
The output end of device is connected with fpga chip respectively.
Further, the frequency divider is 1/400 frequency divider.
Further, first phase shifter, the second phase shifter are 45 ° of phase shifters.
Further, first frequency-selective amplifier, the second frequency-selective amplifier are intermediate frequency amplifier.
The utility model has the beneficial effects that：It is described in the utility model to be used for automobile active anticollision millimetre-wave radar system
It being improved by the antenna to dual-mode antenna module so that improved antenna size is small, and aerial array deflection is 16 degree,
Pitch angle is 6 degree, and good directionality, the antenna array elements being made of 6*14 bay are few, improve yield rate, improve
Gain reaches 25dB or more, while at low cost by verification experimental verification on 24GHz~24.25GHz frequency domains, easy of integration, full
Sufficient automobile active anti-collision radar system wants high about transmission power, power consumption wants low, wave beam wants requirement narrow, that investigative range is remote, together
When reduce array surface standing wave, force down secondary lobe (Sidelobe Suppression be more than 16~25dB), improve receive-transmit isolation.
Description of the drawings
Fig. 1 is the structure diagram described in the utility model for automobile active anticollision millimetre-wave radar system；
Fig. 2 is the structural schematic diagram of bay described in the utility model；
Fig. 3 is the side view of Fig. 1；
Fig. 4 is the structural schematic diagram that 24GHz microstrip array described in the utility model receives and dispatches reciprocity antenna；
Fig. 5 is the structure diagram of data processing module described in the utility model；
Fig. 6 is the structure diagram of RF receiving and transmission module described in the utility model；
It is indicated in figure：Earth plate 1, dielectric substrate 2, radiation patch 3, feeder line 4, rectangular recess 5.
Specific implementation mode
The utility model is further illustrated with reference to the accompanying drawings and examples.
As shown in Figures 1 to 4, described in the utility model to be used for automobile active anticollision millimetre-wave radar system, including receive
Send out Anneta module, RF receiving and transmission module, data processing module, power supply, the dual-mode antenna module, data processing module point
It is not connected with RF receiving and transmission module, the RF receiving and transmission module, data processing module are electrically connected with power supply respectively, the receipts
It is that 24GHz microstrip array receives and dispatches reciprocity antenna to send out Anneta module, and the 24GHz microstrip array transmitting-receiving reciprocity antenna connects including two
It receives antenna and a transmitting antenna, two reception antennas and a transmitting antenna is connected with RF receiving and transmission module respectively, two connect
It receives antenna and a transmitting antenna is made of the aerial array that 6*14 bay is constituted, each bay includes ground connection
Plate 1, dielectric substrate 2, radiation patch 3 and feeder line 4；The dielectric substrate 2 is arranged in the upper surface of earth plate 1, the radiation
Patch 3 is arranged at the upper surface center of dielectric substrate 2, and a side end face of the radiation patch 3 is provided with rectangular recess 5, described
Feeder line 4 is arranged in the upper surface of dielectric substrate 2, and one end of the feeder line 4 extends to the bottom of rectangular recess 5, the feeder line 4
The other end extends to a side end face of dielectric substrate 2.It is described in the utility model to be used for automobile active anticollision millimetre-wave radar system
System is improved by the antenna to dual-mode antenna module so that improved antenna size is small, and aerial array deflection is 16
Degree, pitch angle are 6 degree, and good directionality, the antenna array elements being made of 6*14 bay are few, improve yield rate, carry
High gain reaches 25dB or more, while at low cost by verification experimental verification on 24GHz~24.25GHz frequency domains, easily collects
At meeting that automobile active anti-collision radar system wants high about transmission power, power consumption wants low, wave beam wants narrow, investigative range is remote wants
Ask, at the same reduce array surface standing wave, force down secondary lobe Sidelobe Suppression more than 16~25dB, improve receive-transmit isolation.
In order to make array antenna best results, the radiation patch 3, earth plate 1, dielectric substrate 2 are rectangle, the spoke
Side and the side of dielectric substrate 2 for penetrating patch 3 are parallel to each other, and 2 thickness hs of the dielectric substrate=λ, λ are individual antenna array element
Operation wavelength；The width of the radiation patch 3 is W, and the depth of length L, the feed of radiation patch 3 are I, the I=L/3, institute
It statesIt is described Whereinf0For the resonant frequency of dielectric substrate 2, c is the light velocity, εrFor Jie of dielectric substrate 2
Electric constant；H is 2 thickness of dielectric substrate.Further, the aerial array deflection is 16 degree, pitch angle is 6 degree.Micro-
The full darkroom of wave has carried out comprehensive test to 24GHz microstrip array described above transmitting-receiving reciprocity antenna, and the 24GHz microstrip array is received
Send out reciprocity antenna：A. 24~24.25GHz of frequency, bandwidth<500MHz, b. beam angle：16 ± 0.8 ° of orientation, pitching 6.2 ±
0.5°；C. gain 25dB or more, Sidelobe Suppression are more than 16~25dB.It disclosure satisfy that automobile active anti-collision radar system about transmitting
Power wants high, power consumption wants low, wave beam wants requirement narrow, that investigative range is remote, at the same reduce array surface standing wave, force down secondary lobe,
Improve receive-transmit isolation.
In addition, as shown in figure 5, the data processing module includes signal acquisition circuit, DDS chips, fpga chip, it is described
Signal acquisition circuit includes gain-programmed amplifier and ADC chips, and the gain-programmed amplifier is connected with ADC chips, described
ADC chips, DDS chips are connected with fpga chip respectively, and the fpga chip is electrically connected with power supply, the fpga chip with
RF receiving and transmission module is connected.The data processing module carries out the return signal that reception antenna receives by signal acquisition circuit
Conditioning and ADC conversions；The required FMCW signal of transmitting antenna is generated by DDS chips；Using fpga chip to signal acquisition
Circuit and DDS chips are controlled, and the quick processing to data may be implemented, while it is small-sized that data processing module can be made to realize
Change, it is integrated, and reduce the power consumption of data processing module.
Further, further including RS232 interface circuit, the RS232 interface circuit is connected with fpga chip.By setting
RS232 interface circuit is set, it can be by data transmission that data processing module is handled to host computer, the convenient processing to data
With monitoring.
The fpga chip is preferably Spartan-3 chips, and the exploitation chip of Spartan-3 series is not only with abundant
Logical resource, storage resource and calculation resources, also the I/O interfaces with various high speeds, while the Spartan-3 chips are mainly
It is directed to inexpensive, large capacity Electronic Design and develops, the power consumption of data processing module can be further decreased；DDS cores
The phase noise of piece and the linearity of fm waveform directly affect the quality that transmitting antenna sends signal, in order to ensure transmitting antenna
The quality of signal is sent, the DDS chips are preferably AD9913 chips.
As shown in fig. 6, the RF receiving and transmission module includes radiating circuit and receiving circuit；The radiating circuit includes locking phase
Frequency synthesizer, low-pass filter, frequency divider, voltage-controlled oscillator (VCO), the first power divider, the second power divider, power are put
Big device, power frequency multiplier, the input terminal of the frequency synthesizer of phase locking are connected with fpga chip, the frequency synthesizer of phase locking
Output end is connected with the input terminal of the input terminal of low-pass filter, frequency divider respectively, output end, the frequency dividing of the low-pass filter
The output end of device is connected with the input terminal of voltage-controlled oscillator (VCO) respectively, the output end of the voltage-controlled oscillator (VCO) and the first power divider
It is connected, the output end of first power divider is connected with power amplifier, the second power divider respectively, and the power is put
The output end of big device is connected with the input terminal of power frequency multiplier, and the output end of the power frequency multiplier is connected with transmitting antenna；Institute
It includes low-noise amplifier, third power divider, the 4th power divider, the first phase shifter, the second phase shift to state receiving circuit
Device, the first frequency mixer, the second frequency mixer, the first frequency-selective amplifier, the second frequency-selective amplifier, the first R4 filters, the 2nd R4 filters
The input terminal of wave device, the low-noise amplifier is connected with reception antenna, the output end of the low-noise amplifier and the 4th work(
The input terminal of rate distributor is connected, and the output end of the 4th power divider is mixed with the input terminal of the first phase shifter, second respectively
The input terminal of device is connected, and the output end of the first phase shifter is connected with the input terminal of the first frequency mixer, third power divider it is defeated
Enter end with the output end of the second power divider to be connected, the output end input with the first frequency mixer respectively of third power divider
End, the input terminal of the second phase shifter are connected, and the output end of second phase shifter is connected with the output end of the second frequency mixer, described
The output end of first frequency mixer is connected with the input terminal of the first frequency-selective amplifier, the output end of the first frequency-selective amplifier and the first R4
The input terminal of filter is connected, and the output end of second frequency mixer is connected with the input terminal of the second frequency-selective amplifier, the second choosing
The output end of audio amplifier is connected with the input terminal of the 2nd R4 filters, output end, the first R4 filters of the 2nd R4 filters
Output end be connected respectively with fpga chip.The RF receiving and transmission module includes radiating circuit and receiving circuit transmitting terminal, transmitting electricity
The operation principle on road is as follows：Frequency synthesizer of phase locking is passed through by the low frequency triangular wave swept frequency signal that data processing module provides
Synthesis, the swept-frequency signal of synthesis pass sequentially through low-frequency filter and frequency divider respectively, are carried out subsequently into voltage-controlled oscillator (VCO) voltage-controlled
Concussion is divided into two-way using the first power divider and emits signal, wherein transmitting signal passes through the first power point successively all the way
Orchestration, power amplifier, the processing of power frequency multiplier, are finally radiate by feeder line from transmitting antenna；Another way emits signal warp
Cross the second power divider；The operation principle of receiving circuit is as follows：The echo-signal that every road reception antenna is received, according to
It is secondary by low-noise amplifier and the 4th power divider after, signal is divided into two-way, wherein all the way after the first phase shifter
With successively pass through the second power divider, third power divider the signal in orthogonal of transmitting all the way be mixed, formed echo base band answer
Signal is sent to the first frequency-selective amplifier, the first R4 filters, obtains 2 road I/Q zero intermediate frequency signals, is realized and is solved to the correlation of echo
It adjusts；In addition all the way with successively pass through the second power divider, third power divider, the second phase shifter the signal of transmitting all the way just
Mixing is handed over, echo baseband complex signal is formed and send to the second frequency-selective amplifier, the 2nd R4 filters, obtains 2 road I/Q zero intermediate frequencys letters
Number, realize the correlation demodulation to echo；It not only can greatly simplify circuit, while can effectively ensure that echo baseband signal
Integrality；The RF receiving and transmission module can greatly simplify system structure under the premise of ensureing system index, cost effective, small-sized
Change, reduce power consumption, while improving receive-transmit isolation.
In order to keep transmitting-receiving effect more preferable, the frequency divider is 1/400 frequency divider.First phase shifter, the second phase shifter
It is 45 ° of phase shifters.First frequency-selective amplifier, the second frequency-selective amplifier are intermediate frequency amplifier.
Claims (10)
1. being used for automobile active anticollision millimetre-wave radar system, including dual-mode antenna module, RF receiving and transmission module, data processing mould
Block, power supply, the dual-mode antenna module, data processing module are connected with RF receiving and transmission module respectively, the radio-frequency receiving-transmitting
Module, data processing module are electrically connected with power supply respectively, it is characterised in that：The dual-mode antenna module is 24GHz micro-strips
Array receives and dispatches reciprocity antenna, and the 24GHz microstrip array transmitting-receiving reciprocity antenna includes two reception antennas and a transmitting antenna,
Two reception antennas and a transmitting antenna are connected with RF receiving and transmission module respectively, and two reception antennas and a transmitting antenna are equal
The aerial array being made of 6*14 bay forms, and each bay includes earth plate (1), dielectric substrate (2), radiation
Patch (3) and feeder line (4)；Dielectric substrate (2) setting is in the upper surface of earth plate (1), radiation patch (3) setting
A side end face at the upper surface center of dielectric substrate (2), the radiation patch (3) is provided with rectangular recess (5), the feeder line
(4) it is arranged in the upper surface of dielectric substrate (2), one end of the feeder line (4) extends to the bottom of rectangular recess (5), the feedback
The other end of line (4) extends to a side end face of dielectric substrate (2).
2. being used for automobile active anticollision millimetre-wave radar system as described in claim 1, it is characterised in that：The radiation patch
(3), earth plate (1), dielectric substrate (2) are rectangle, and the side and the side of dielectric substrate (2) of the radiation patch (3) are mutual
Parallel, dielectric substrate (2) thickness h=λ, λ are individual antenna array element operation wavelength；The width of the radiation patch (3)
For W, length L, the depth of the feed of radiation patch (3) is I, the I=L/3, describedIt is describedWherein
f0For the resonant frequency of dielectric substrate (2), c is the light velocity, εrFor the dielectric constant of dielectric substrate (2)；H is that dielectric substrate (2) is thick
Degree.
3. being used for automobile active anticollision millimetre-wave radar system as claimed in claim 2, it is characterised in that：The aerial array
Deflection is 16 degree, and pitch angle is 6 degree.
4. being used for automobile active anticollision millimetre-wave radar system as claimed in claim 3, it is characterised in that：The data processing
Module includes signal acquisition circuit, DDS chips, fpga chip, and the signal acquisition circuit includes gain-programmed amplifier and ADC
Chip, the gain-programmed amplifier are connected with ADC chips, and the ADC chips, DDS chips are connected with fpga chip respectively, institute
It states fpga chip to be electrically connected with power supply, the fpga chip is connected with RF receiving and transmission module.
5. being used for automobile active anticollision millimetre-wave radar system as claimed in claim 4, it is characterised in that：Further include RS232
Interface circuit, the RS232 interface circuit are connected with fpga chip.
6. being used for automobile active anticollision millimetre-wave radar system as claimed in claim 5, it is characterised in that：The fpga chip
For Spartan-3 chips, the DDS chips are AD9913 chips.
7. being used for automobile active anticollision millimetre-wave radar system as claimed in claim 6, it is characterised in that：The radio-frequency receiving-transmitting
Module includes radiating circuit and receiving circuit；The radiating circuit include frequency synthesizer of phase locking, low-pass filter, frequency divider,
Voltage-controlled oscillator (VCO), the first power divider, the second power divider, power amplifier, power frequency multiplier, the frequency of phase locking close
The input terminal grown up to be a useful person is connected with fpga chip, the output end of the frequency synthesizer of phase locking respectively with the input of low-pass filter
End, frequency divider input terminal be connected, the output end of the low-pass filter, the output end of frequency divider respectively with voltage-controlled oscillator (VCO)
Input terminal be connected, the output end of the voltage-controlled oscillator (VCO) is connected with the first power divider, first power divider it is defeated
Outlet is connected with power amplifier, the second power divider respectively, output end and the power frequency multiplier of the power amplifier
Input terminal is connected, and the output end of the power frequency multiplier is connected with transmitting antenna；The receiving circuit include low-noise amplifier,
Third power divider, the 4th power divider, the first phase shifter, the second phase shifter, the first frequency mixer, the second frequency mixer,
One frequency-selective amplifier, the second frequency-selective amplifier, the first R4 filters, the 2nd R4 filters, the input of the low-noise amplifier
End is connected with reception antenna, and the output end of the low-noise amplifier is connected with the input terminal of the 4th power divider, the 4th work(
The output end of rate distributor is connected with the input terminal of the input terminal of the first phase shifter, the second frequency mixer respectively, the first phase shifter
Output end is connected with the input terminal of the first frequency mixer, the output end of the input terminal of third power divider and the second power divider
It is connected, the output end of third power divider is connected with the input terminal of the input terminal of the first frequency mixer, the second phase shifter respectively, institute
The output end for stating the second phase shifter is connected with the output end of the second frequency mixer, the output end of first frequency mixer and the first frequency-selecting
The input terminal of amplifier is connected, and the output end of the first frequency-selective amplifier is connected with the input terminal of the first R4 filters, and described second
The output end of frequency mixer is connected with the input terminal of the second frequency-selective amplifier, and the output end of the second frequency-selective amplifier and the 2nd R4 are filtered
The input terminal of device is connected, and the output end of the 2nd R4 filters, the output end of the first R4 filters are connected with fpga chip respectively.
8. being used for automobile active anticollision millimetre-wave radar system as claimed in claim 7, it is characterised in that：The frequency divider is
1/400 frequency divider.
9. being used for automobile active anticollision millimetre-wave radar system as claimed in claim 8, it is characterised in that：First phase shift
Device, the second phase shifter are 45 ° of phase shifters.
10. being used for automobile active anticollision millimetre-wave radar system as claimed in claim 9, it is characterised in that：First choosing
Audio amplifier, the second frequency-selective amplifier are intermediate frequency amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820348231.5U CN207851289U (en) | 2018-03-14 | 2018-03-14 | For automobile active anticollision millimetre-wave radar system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820348231.5U CN207851289U (en) | 2018-03-14 | 2018-03-14 | For automobile active anticollision millimetre-wave radar system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207851289U true CN207851289U (en) | 2018-09-11 |
Family
ID=63424481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820348231.5U Expired - Fee Related CN207851289U (en) | 2018-03-14 | 2018-03-14 | For automobile active anticollision millimetre-wave radar system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207851289U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109462042A (en) * | 2018-11-14 | 2019-03-12 | 广州合智瑞达科技有限公司 | A kind of vehicle anticollision radar array antenna and the circuit board equipped with the array antenna |
| CN113820707A (en) * | 2021-09-18 | 2021-12-21 | 石家庄铁道大学 | TRM-based through-wall radar detector |
-
2018
- 2018-03-14 CN CN201820348231.5U patent/CN207851289U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109462042A (en) * | 2018-11-14 | 2019-03-12 | 广州合智瑞达科技有限公司 | A kind of vehicle anticollision radar array antenna and the circuit board equipped with the array antenna |
| CN113820707A (en) * | 2021-09-18 | 2021-12-21 | 石家庄铁道大学 | TRM-based through-wall radar detector |
| CN113820707B (en) * | 2021-09-18 | 2023-05-26 | 石家庄铁道大学 | TRM-based through-wall radar detector |
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