CN104360318A - Radar front-end module and radar system - Google Patents
Radar front-end module and radar system Download PDFInfo
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- CN104360318A CN104360318A CN201410541806.1A CN201410541806A CN104360318A CN 104360318 A CN104360318 A CN 104360318A CN 201410541806 A CN201410541806 A CN 201410541806A CN 104360318 A CN104360318 A CN 104360318A
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- chip
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- end module
- radar
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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
- 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
- G01S7/35—Details of non-pulse systems
-
- 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
- G01S7/35—Details of non-pulse systems
- G01S7/352—Receivers
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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)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses a radar front-end module and a radar system and belongs to the technical field of radars. The radar front-end module comprises a signal generator, a transmitting chip, a receiving chip and a transceiving antenna, wherein the signal generator is connected with the transceiving antenna via the transmitting chip, the transceiving antenna is connected with the receiving chip, and the receiving chip is connected with the transmitting chip. The transceiving antenna comprises at least two transmitting antennas and at least two receiving antennas, wherein the transmitting antennas are used for transmitting signals, and the receiving antennas are used for receiving echoes. The transmitting chip is used for acquiring at least two groups of microwave signals according to the signals generated by the signal generator, so that the microwave signals can be transmitted via the transmitting antennas used for transmitting the signals. By the aid of the radar front-end module, cost of the radar system with various detecting functions can be effectively reduced.
Description
Technical field
The present invention relates to Radar Technology field, particularly a kind of radar front end module and radar system.
Background technology
Along with the rapid rising of China's total vehicle, traffic safety problem also result in the extensive concern of government and society, and on-vehicle safety early warning technology arises at the historic moment thereupon.The detection of current automobile collision preventing mainly adopts some metering systems such as infrared, laser, camera, radar.Wherein infrared, the shortcoming such as although laser, the first-class optical technology of shooting are cheap and technology is simple, and the bad and detection range of these technology ubiquity all weather operations effects is short.
Comparatively speaking, radar, then because of its stable detection performance had and good environmental suitability, becomes the first-selection of initiatively anti-collision technique gradually.Particularly blind spot is detected (English: Blind SpotDetection, be called for short: BSD) auxiliary (English: lane change assist with lane change, be called for short: LCA) system, existing trailer-mounted radar effectively can realize the solution for BSD or LCA simple function, and how to improve the integrated level of radar system further, realize the emphasis that multiple measuring ability also becomes people's concern simultaneously.
In prior art, although market there is the scheme realizing this BSD and LCA function based on higher-frequency radars such as 77GHz radars simultaneously, its weak point is, the general cost of currently used higher-frequency radar is higher, thus makes economical sedan-chair be difficult to bear.
Summary of the invention
In order to reduce the cost of the radar system with multiple measuring ability, embodiments provide a kind of radar front end module and radar system.Described technical scheme is as follows:
Embodiments provide a kind of radar front end module, comprise: signal generator, transmitting chip, receiving chip and dual-mode antenna, described signal generator is connected with described dual-mode antenna by described transmitting chip, described dual-mode antenna is also connected with described receiving chip, and described receiving chip is connected with described transmitting chip;
Described dual-mode antenna comprise at least two-way for the emitting antenna that transmits and at least two-way for receiving the receiving antenna of echo;
The signal that described transmitting chip is used for producing according to described signal generator obtains at least two group microwave signals, with at least two group microwave signals described in making by least described transmission antennas transmit of two-way for transmitting.
Further, described receiving chip is also connected with intermediate frequency process module.
Wherein, described signal generator is phase-locked loop chip.
Further, described transmitting chip comprises VCO calibration circuit, R frequency divider, power divider, Fractional-N frequency device, the first power amplifier, the second power amplifier, the first amplifier, the first controllable gain amplifier and the first Ba Lun;
Described VCO calibration circuit is connected with described signal generator and described power divider respectively, signal for inputting according to described signal generator produces Continuous Wave with frequency modulation, and is divided into two paths of signals to input described first power amplifier and described second power amplifier respectively Continuous Wave with frequency modulation by described power divider;
The two paths of signals exported by described power divider also feeds back to described signal generator by described Fractional-N frequency device;
The two paths of signals exported by described power divider inputs described receiving chip through the first Ba Lun after also amplifying respectively by described first amplifier and described first controllable gain amplifier.
Described receiving chip comprises 4 groups of receiving circuits be set up in parallel;
Described receiving circuit comprises the first low noise amplifier, the second Ba Lun, frequency mixer and the second amplifier, and described first low noise amplifier connects described receiving antenna and described second Ba Lun respectively;
The signal that described frequency mixer is used for described second Ba Lun exports carries out mixing with the signal from described transmitting chip, and exports described intermediate frequency process module to by described second amplifier.
Described intermediate frequency process module comprises the 4 group interface circuit corresponding with receiving circuit in described receiving chip;
Described interface circuit comprises the second low noise amplifier, the second controllable gain amplifier and analog to digital converter, and the signal from described receiving chip inputs to data-interface respectively by described second low noise amplifier, described second controllable gain amplifier and described analog to digital converter.
Preferably, described transmitting chip and described receiving chip all adopt silica-based technique to make.
The embodiment of the present invention also provides a kind of radar system, and described radar system comprises radar front end module as above.
The radar front end module that the embodiment of the present invention provides and radar system, radar front end module comprises signal generator, transmitting chip, receiving chip and dual-mode antenna, the signal that wherein transmitting chip is used for producing according to signal generator obtains at least two group microwave signals, passes through at least described transmission antennas transmit of two-way for transmitting to make at least two group microwave signals.By adopting two-way transmission channel, the signal that transmission antennas transmit is gone out can cover different regions respectively, further by the receiving and analyzing of zones of different echo thus the detections of radar that can realize for multiple zones of different.Adopt a kind of like this design of radar front end module can be widely used in various Low-frequency radar system, make Low-frequency radar system realize multiple measuring ability simultaneously, thus significantly reduce the cost of the radar system with multiple measuring ability.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of radar front end module that the embodiment of the present invention provides;
Fig. 2 is the circuit structure block diagram of a kind of radar front end module that the embodiment of the present invention provides;
Fig. 3 is the use schematic diagram of a kind of radar front end module that the embodiment of the present invention provides.
Reference numeral
1-radar front end module, 11-signal generator, 12-transmitting chip, 13-receiving chip, 14-dual-mode antenna;
121-VCO calibration circuit, 122-R frequency divider, 123-power divider, 124-N frequency divider, 125-first power amplifier, 126-second power amplifier, 127-first amplifier, 128-first controllable gain amplifier, 129-first Ba Lun;
131-first low noise amplifier, 132-second Ba Lun, 133-frequency mixer, 134-second amplifier;
141-emitting antenna, 142-receiving antenna;
2-intermediate frequency process module, 21-second low noise amplifier, 22-second controllable gain amplifier, 23-analog to digital converter.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiments provide a kind of radar front end module 1, comprise: signal generator 11, transmitting chip 12, receiving chip 13 and dual-mode antenna 14, as shown in Figure 1, signal generator 11 is connected with dual-mode antenna 14 by transmitting chip 12, dual-mode antenna 14 is also connected with receiving chip 13, and receiving chip 13 is connected with transmitting chip 12.
Wherein, dual-mode antenna 14 comprise at least two-way for the emitting antenna 141 that transmits and at least two-way for receiving the receiving antenna 142 of echo.
Transmitting chip 12 obtains at least two group microwave signals for the signal produced according to signal generator 11, passes through at least two-way launch for the emitting antenna 141 transmitted to make at least two group microwave signals.
The radar front end module that the embodiment of the present invention provides, comprise signal generator, transmitting chip, receiving chip and dual-mode antenna, the signal that wherein transmitting chip is used for producing according to signal generator obtains at least two group microwave signals, passes through at least described transmission antennas transmit of two-way for transmitting to make at least two group microwave signals.By adopting two-way transmission channel, the signal that transmission antennas transmit is gone out can cover different regions respectively, further by the receiving and analyzing of zones of different echo thus the detections of radar that can realize for multiple zones of different.Adopt a kind of like this design of radar front end module can be widely used in various Low-frequency radar system, make Low-frequency radar system realize multiple measuring ability simultaneously, thus significantly reduce the cost of the radar system with multiple measuring ability.
Further, as shown in Figure 1, receiving chip 13 is also connected with intermediate frequency process module 2.
Concrete, the structure of the radar front end module that the embodiment of the present invention provides can as shown in Figure 2, and wherein, signal generator 11 can be phase-locked loop chip.It should be noted that, in embodiments of the present invention, signal generator 11 can adopt the circuit structure of various known phase-locked loop chip structure or various equivalence with it, and be also only illustrate with a kind of phase-locked loop chip structure example in Fig. 2, the embodiment of the present invention does not limit this.
Further, as shown in Figure 2, transmitting chip 12 specifically can comprise VCO calibration circuit 121, R frequency divider 122, power divider 123, Fractional-N frequency device 124, first power amplifier 125, second power amplifier 126, first amplifier 127, first controllable gain amplifier 128 and the first Ba Lun 129.
Wherein, VCO calibration circuit 121 is connected with signal generator 11 and power divider 123 respectively, signal for inputting according to signal generator 11 produces Continuous Wave with frequency modulation, and is divided into two paths of signals to input the first power amplifier 125 and the second power amplifier 126 respectively Continuous Wave with frequency modulation by power divider 123.
In addition, the two paths of signals exported by power divider 123 can also feed back to signal generator 11 by Fractional-N frequency device 124.The two paths of signals exported by power divider 123 inputs receiving chip 13 through the first Ba Lun 129 after can also amplifying respectively by the first amplifier 127 and the first controllable gain amplifier 128.
It should be noted that, be obtain two groups of explanations that microwave signal is carried out for transmitting chip 12 according to the signal that signal generator 11 produces in embodiments of the present invention, and two groups of microwave signals are launched through two-way emitting antenna 141 and cover different regions respectively.Certainly, according to actual needs, by increasing the fractional frequency signal quantity of the output of power divider 123, and power amplifier number can correspondingly be increased to realize more function equally.
Further, as shown in Figure 2, receiving chip 13 can comprise 4 groups of receiving circuits be set up in parallel.
Wherein, each group receiving circuit can comprise again the first low noise amplifier 131, second Ba Lun 132, frequency mixer 133 and the second amplifier 134, first low noise amplifier 131 and connect receiving antenna 142 and the second Ba Lun 132 respectively.
Frequency mixer 133 carries out mixing for the signal exported by the second Ba Lun 132 with the signal from transmitting chip 12, and exports intermediate frequency process module 2 to by the second amplifier 134.
In embodiments of the present invention, as shown in Figure 2, corresponding dual-mode antenna 14 specifically comprises No. 2 emitting antenna 141 and 4 road receiving antennas 142.Certainly above also only to illustrate, can the quantity of corresponding increase receiving circuit and receiving antenna 142 according to actual needs.
Further, as shown in Figure 2, intermediate frequency process module 2 can comprise the 4 group interface circuit corresponding with receiving circuit in receiving chip 13.
Wherein, interface circuit comprises the second low noise amplifier 21, second controllable gain amplifier 22 and analog to digital converter 23, and the signal from receiving chip 13 inputs to data-interface respectively by the second low noise amplifier 21, second controllable gain amplifier 22 and analog to digital converter 23.
Adopt a kind of like this radar front end module of structure effectively can realize the multiple measuring ability of radar system.Specific implementation process is as follows:
The Continuous Wave with frequency modulation that VCO calibration circuit 121 can produce 24GHz according to modulation signal (as triangular signal) is (English: Frequency Modulated Continuous Wave, be called for short: FMCW) microwave signal, microwave signal power is divided into two through power divider 123 by this high-frequency signal, and two paths of signals is directly directly fed to two-way emitting antenna 141 and goes out to spatial emission after two-way power amplifier 125 and 126 amplifies.Wherein, signal is become the local vibration source of differential signal as receiving chip through being coupled through after the first amplifier 127 and the first controllable gain amplifier 128 amplify through the first Ba Lun 129 by Partial Power.
When the electromagnetic wave launched runs into barrier, just the echoed signal reflected is had, 4 road receiving antennas 142 can receive echoed signal, signal is converted to differential high frequency signal after carrying out low noise amplification Hou Jing tetra-tunnel second Ba Lun 132 by Bing Jing tetra-tunnel first low noise amplifier 131, carry out mixing through frequency mixer 133 and four road local oscillation signals again, the intermediate-freuqncy signal of output directly supplies intermediate frequency process module 2 after four tunnel second amplifiers 134 amplify.
Intermediate frequency process module 2 carries out analyzing and processing to signal after intermediate-freuqncy signal is carried out amplification analog to digital conversion, obtains measured target apart from the distance of this car, speed and azimuth information.
So, by adopting two-way transmission channel, two-way transmission channel is gone out through two transmission antennas transmit and is covered different regions respectively, one road emphasis covers to region (in Fig. 3 B region) behind this track, and another road emphasis covers blind area of vehicle rear mirror (in Fig. 3 a-quadrant).Four road receiving cables receive the intermediate-freuqncy signal that obtains distance, speed, angle information that wherein two paths of signals obtains by analysis and are mainly used in BSD system, and distance, speed and angle information that another two paths of signals obtains by analysis are mainly used in LCA system, like this, individual module just can take into account BSD with LCA systemic-function.The functions such as further, this system also other functions of easily extensible hits warning system in advance as backward, the horizontal road conditions early warning of backward reversing.
In embodiments of the present invention, transmitting chip 12 and receiving chip 13 all can adopt silica-based technique to make.Because transmitting chip 12 and receiving chip 13 all adopt silica-based technological design, system has that volume is little simultaneously, and cost is low, the advantage of dependable performance.
The embodiment of the present invention also provides a kind of radar system, and wherein, this radar system comprises radar front end module 1 as above.
The concrete structure of radar front end module 1 and specific implementation have done detailed description in the aforementioned embodiment, do not repeat herein.
The radar system that the embodiment of the present invention provides, comprise radar front end module, this radar front end module comprises signal generator, transmitting chip, receiving chip and dual-mode antenna, the signal that wherein transmitting chip is used for producing according to signal generator obtains at least two group microwave signals, passes through at least described transmission antennas transmit of two-way for transmitting to make at least two group microwave signals.By adopting two-way transmission channel, the signal that transmission antennas transmit is gone out can cover different regions respectively, further by the receiving and analyzing of zones of different echo thus the detections of radar that can realize for multiple zones of different.Adopt a kind of like this design of radar front end module can be widely used in various Low-frequency radar system, make Low-frequency radar system realize multiple measuring ability simultaneously, thus significantly reduce the cost of the radar system with multiple measuring ability.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be ROM (read-only memory), disk or CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a radar front end module, it is characterized in that, comprise: signal generator, transmitting chip, receiving chip and dual-mode antenna, described signal generator is connected with described dual-mode antenna by described transmitting chip, described dual-mode antenna is also connected with described receiving chip, and described receiving chip is connected with described transmitting chip;
Described dual-mode antenna comprise at least two-way for the emitting antenna that transmits and at least two-way for receiving the receiving antenna of echo;
The signal that described transmitting chip is used for producing according to described signal generator obtains at least two group microwave signals, with at least two group microwave signals described in making by least described transmission antennas transmit of two-way for transmitting.
2. radar front end module according to claim 1, is characterized in that, described receiving chip is also connected with intermediate frequency process module.
3. radar front end module according to claim 1, is characterized in that, described signal generator is phase-locked loop chip.
4. radar front end module according to claim 1 and 2, it is characterized in that, described transmitting chip comprises VCO calibration circuit, R frequency divider, power divider, Fractional-N frequency device, the first power amplifier, the second power amplifier, the first amplifier, the first controllable gain amplifier and the first Ba Lun;
Described VCO calibration circuit is connected with described signal generator and described power divider respectively, signal for inputting according to described signal generator produces Continuous Wave with frequency modulation, and is divided into two paths of signals to input described first power amplifier and described second power amplifier respectively Continuous Wave with frequency modulation by described power divider;
The two paths of signals exported by described power divider also feeds back to described signal generator by described Fractional-N frequency device;
The two paths of signals exported by described power divider inputs described receiving chip through the first Ba Lun after also amplifying respectively by described first amplifier and described first controllable gain amplifier.
5. radar front end module according to claim 4, is characterized in that, described receiving chip comprises 4 groups of receiving circuits be set up in parallel;
Described receiving circuit comprises the first low noise amplifier, the second Ba Lun, frequency mixer and the second amplifier, and described first low noise amplifier connects described receiving antenna and described second Ba Lun respectively;
The signal that described frequency mixer is used for described second Ba Lun exports carries out mixing with the signal from described transmitting chip, and exports described intermediate frequency process module to by described second amplifier.
6. radar front end module according to claim 5, is characterized in that, described intermediate frequency process module comprises the 4 group interface circuit corresponding with receiving circuit in described receiving chip;
Described interface circuit comprises the second low noise amplifier, the second controllable gain amplifier and analog to digital converter, and the signal from described receiving chip inputs to data-interface respectively by described second low noise amplifier, described second controllable gain amplifier and described analog to digital converter.
7. radar front end module according to claim 1, is characterized in that, described transmitting chip and described receiving chip all adopt silica-based technique to make.
8. a radar system, is characterized in that, described radar system comprise as arbitrary in claim 1-7 as described in radar front end module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410541806.1A CN104360318A (en) | 2014-10-14 | 2014-10-14 | Radar front-end module and radar system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410541806.1A CN104360318A (en) | 2014-10-14 | 2014-10-14 | Radar front-end module and radar system |
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| CN104360318A true CN104360318A (en) | 2015-02-18 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104714228A (en) * | 2015-03-18 | 2015-06-17 | 奇瑞汽车股份有限公司 | Radar front end module for door opening early-warning system |
| CN104833960A (en) * | 2015-04-30 | 2015-08-12 | 中国电子科技集团公司第三十八研究所 | T/R device |
| CN104991253A (en) * | 2015-07-27 | 2015-10-21 | 芜湖市汽车产业技术研究院有限公司 | Wave radar system |
| CN107845860A (en) * | 2016-09-21 | 2018-03-27 | 北京行易道科技有限公司 | Antenna system and radar |
| CN108292929A (en) * | 2015-09-10 | 2018-07-17 | 蓝色多瑙河系统有限公司 | Active array is calibrated |
| CN110988882A (en) * | 2019-10-31 | 2020-04-10 | 惠州市德赛西威汽车电子股份有限公司 | 77GHz sparse array automobile anti-collision radar receiving antenna |
| CN112394327A (en) * | 2019-08-12 | 2021-02-23 | 通用汽车环球科技运作有限责任公司 | Chip-based transmit channel architecture |
| CN113917460A (en) * | 2021-09-30 | 2022-01-11 | 广州极飞科技股份有限公司 | Radar imaging equipment and terminal |
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| CN104714228A (en) * | 2015-03-18 | 2015-06-17 | 奇瑞汽车股份有限公司 | Radar front end module for door opening early-warning system |
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| CN110988882A (en) * | 2019-10-31 | 2020-04-10 | 惠州市德赛西威汽车电子股份有限公司 | 77GHz sparse array automobile anti-collision radar receiving antenna |
| CN110988882B (en) * | 2019-10-31 | 2024-05-31 | 惠州市德赛西威汽车电子股份有限公司 | 77GHz sparse array automobile anti-collision radar receiving antenna |
| CN113917460A (en) * | 2021-09-30 | 2022-01-11 | 广州极飞科技股份有限公司 | Radar imaging equipment and terminal |
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Application publication date: 20150218 |