CN214845749U - Millimeter wave radar transmitting and receiving system and radar - Google Patents
Millimeter wave radar transmitting and receiving system and radar Download PDFInfo
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Abstract
The utility model provides a millimeter wave radar receiving and dispatching system and radar relates to radar technical field. The utility model discloses a local oscillator transmission line connects two the same first radar transceiver chip and second radar transceiver chip, and the first local oscillator output port of first radar transceiver chip and the second local oscillator input port of second radar transceiver chip are connected to the local oscillator transmission line. The utility model discloses in, two radar transceiver chips pass through the local oscillator transmission line and cascade, realize a millimeter wave radar transceiver system that eight passageway of six passageway transmission received, the signal throughput has been improved, utilize first local oscillator on the first radar transceiver chip to produce and frequency doubling module as the frequency source, provide local oscillator signal for two radar transceiver chips, local oscillator signal passes through local oscillator transmission line transmission between two radar transceiver chips stages, whole radar system has realized broadband frequency modulation, high speed modulation and high power output, the design of radar system has been simplified, the integration level is improved, the cost of radar system is reduced.
Description
Technical Field
The utility model relates to a radar technical field, concretely relates to millimeter wave radar receiving and dispatching system and radar.
Background
With the popularization of millimeter wave radar transceiver chips, especially the breakthrough of 77GHz millimeter wave chips in the CMOS process field, the demand of sensors based on millimeter wave radar is increasing day by day. The application range of the millimeter wave radar is also expanded to application scenes with detection distances of 0-40 m, such as security imaging, vital sign detection, gesture recognition and the like.
For a short-distance or ultra-short-distance millimeter wave radar receiving and transmitting system, in the prior art, in order to improve channel throughput, distance resolution and shorten signal processing time, a structure of a multipath receiving and transmitting front-end device + a high-performance frequency source is generally adopted.
However, the structure of the multiple transceiving front-end device + the high-performance frequency source causes an increase in cost and an increase in system volume and power consumption. Namely, the cost of the existing millimeter wave radar transceiving system is too high.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Not enough to prior art, the utility model provides a millimeter wave radar receiving and dispatching system and radar has solved the technical problem that current millimeter wave radar receiving and dispatching system is with high costs.
(II) technical scheme
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:
the utility model provides a millimeter wave radar receiving and dispatching system, include:
the first radar receiving and transmitting chip comprises a first local oscillator generating and frequency doubling module and a first local oscillator output port, wherein the first local oscillator generating and frequency doubling module is used for generating local oscillator signals;
the second radar receiving and transmitting chip comprises a second local oscillator input port, a second local oscillator selection module and a second local oscillator generation and frequency multiplication module, wherein the second local oscillator generation and frequency multiplication module is closed and does not output local oscillator signals to the outside of the chip;
the local oscillator transmission line is connected with the first local oscillator output port and the second local oscillator input port;
the local oscillator transmission line transmits the local oscillator signals to a second radar receiving and transmitting chip, and the second local oscillator selection module transmits the local oscillator signals to the chip for radar work.
Preferably, the first radar transceiver chip further includes:
the system comprises a first local oscillator input port, a first local oscillator selection module, a first local oscillator power division module, a first four-channel receiving module and a first three-channel transmitting module; when the local oscillator power dividing module normally works, the first local oscillator generating and frequency doubling module generates local oscillator signals, the local oscillator signals are transmitted to the first local oscillator power dividing module after being gated by the first local oscillator selecting module, the first local oscillator power dividing module divides the signal power and then transmits the signal power to the first four-channel receiving module, the first three-channel transmitting module and the first local oscillator output port respectively, and the first local oscillator input port is closed.
Preferably, the second radar transceiver chip further includes:
the second local oscillator power division module, the second four-channel receiving module, the second three-channel transmitting module and the second local oscillator output port; when the frequency doubling module works normally, the second local oscillator input port is opened, the second local oscillator selection module gates local oscillator signals from the second local oscillator input port and transmits the local oscillator signals to the second local oscillator power division module, the second local oscillator power division module divides the signals and transmits the divided signals to the second four-channel receiving module and the second three-channel transmitting module respectively, the second local oscillator generation and frequency doubling module is closed, and the second local oscillator output port is closed.
Preferably, the first local oscillator generating and frequency doubling module includes a frequency source and a first frequency multiplier, the frequency source generates a local oscillator signal in a 19.25GHz frequency band, and the local oscillator signal is multiplied by the first frequency multiplier to output in a 38.5GHz frequency band.
Preferably, the first four-channel receiving module includes a second frequency multiplier, a first power divider, and a four-channel millimeter wave receiving front end, where the second frequency multiplier multiplies the frequency of the 38.5GHz band local oscillation signal from the local oscillation power divider module to a 77GHz band, and the frequency is divided into four paths of 77GHz band local oscillation signals by the first power divider to the four-channel millimeter wave receiving front end.
Preferably, the first three-channel transmitting module includes a third frequency multiplier, a second power divider, and a three-channel millimeter wave transmitting front end, where the third frequency multiplier multiplies the local oscillation signal in the 38.5GHz band from the local oscillation power divider module to a 77GHz band, and the third frequency multiplier divides the local oscillation signal into three 77GHz band signals through the second power divider, and sends the three 77GHz band signals to the three-channel millimeter wave transmitting front end.
Preferably, the four-channel millimeter wave receiving front end includes four identical millimeter wave receiving front ends, each millimeter wave receiving front end includes a millimeter wave input port, a millimeter wave low-noise amplifier, a millimeter wave mixer, a local oscillation signal driver amplifier, an analog baseband circuit module, an analog-to-digital converter, and a digital output port, the millimeter wave input port is sequentially connected to the millimeter wave low-noise amplifier and the millimeter wave mixer, the millimeter wave mixer is further sequentially connected to the analog baseband circuit module, the analog-to-digital converter, and the digital output port, the millimeter wave mixer is further connected to the local oscillation driver amplifier, and the local oscillation driver amplifier is further connected to the first power divider.
Preferably, the three-channel millimeter wave transmission front end comprises three identical millimeter wave transmission front ends, each millimeter wave transmission front end comprises a millimeter wave phase shifter, a millimeter wave power amplifier and a millimeter wave output port, the millimeter wave phase shifters are connected with the second power divider, and the millimeter wave phase shifters are further connected with the millimeter wave power amplifiers and the millimeter wave output ports in sequence.
Preferably, the second radar transceiver chip and the first radar transceiver chip have the same structure.
The utility model also provides a millimeter wave radar, including the aforesaid millimeter wave radar receiving and dispatching system.
(III) advantageous effects
The utility model provides a millimeter wave radar receiving and dispatching system and radar. Compared with the prior art, the method has the following beneficial effects:
the utility model discloses a local oscillator transmission line connects two the same first radar transceiver chip and second radar transceiver chip, and the first local oscillator output port of first radar transceiver chip and the second local oscillator input port of second radar transceiver chip are connected to the local oscillator transmission line. And the second local oscillator selection module of the second radar transceiver chip transmits the local oscillator signal from the local oscillator transmission line to the chip for radar work. The utility model discloses in, two radar transceiver chips pass through the local oscillator transmission line and cascade, realize a six passageway transmission (6T)/eight passageway millimeter wave radar transceiver system who receives (8R), signal throughput has been improved, utilize first local oscillator on the first radar transceiver chip to produce and frequency doubling module as the frequency source, provide local oscillator signal for two radar transceiver chips, local oscillator signal passes through local oscillator transmission line transmission between two radar transceiver chips stage, whole radar system has realized broadband frequency modulation, high speed modulation and high power output, radar system's design has been simplified, the integration level has been improved, radar system's cost has been reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a millimeter wave radar transceiver system according to an embodiment of the present invention;
fig. 2 is a frequency spectrum diagram of a transmission signal bandwidth according to an embodiment of the present invention;
fig. 3 is a waveform diagram of the frequency modulation frequency of the transmission signal varying with time according to an embodiment of the present invention;
fig. 4 is a graph of the output power of the transmission signal varying with frequency according to the embodiment of the present invention.
Wherein, 110-a first radar transceiver chip, 120-a local oscillator transmission line, 130-a second radar transceiver chip, 210-a first local oscillator input port, 220-a first local oscillator selection module, 230-a first local oscillator generation and frequency multiplication module, 240-a first local oscillator power division module, 250-a first four-channel receiving module, 260-a first three-channel transmitting module, 270-a first local oscillator output port, 211-a second local oscillator input port, 221-a second local oscillator selection module, 231-a second local oscillator generation and frequency multiplication module, 241-a second local oscillator power division module, 251-a second four-channel receiving module, 261-a second three-channel transmitting module, 271-a second local oscillator output port, 310-a first frequency multiplier, 320-a frequency source, 330-a second frequency multiplier, 340-a first power divider, 350-a four-channel millimeter wave receiving front end, 360-a third frequency multiplier, 370-a second power divider, 380-a three-channel millimeter wave transmitting front end, 410-a millimeter wave input port, 420-a millimeter wave low noise amplifier, 430-a millimeter wave mixer, 440-a local oscillator signal driving amplifier, 450-an analog baseband circuit module, 460-an analog-to-digital converter, 470-a digital output port, 510-a millimeter wave phase shifter, 520-a millimeter wave power amplifier and 530-a millimeter wave output port.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The embodiment of the application provides a millimeter wave radar receiving and dispatching system and radar, has solved current millimeter wave radar receiving and dispatching system cost and is too high, realizes broadband frequency modulation, high-speed frequency modulation and high power output, has simplified radar system's design, has improved the integrated level, has reduced radar system's cost.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
for a short-distance or ultra-short-distance millimeter wave radar receiving and transmitting system, in the prior art, in order to improve channel throughput, distance resolution and shorten signal processing time, a structure of a multipath receiving and transmitting front-end device and a high-performance frequency source is generally adopted, but cost increase and system volume and power consumption increase are brought; if the cost, the volume and the power consumption are to be controlled, a high-integration millimeter wave radar transceiver chip can be used, but a single chip is difficult to consider indexes such as high data throughput, high linearity, high frequency modulation bandwidth and high frequency modulation rate at the same time in a millimeter wave frequency band, so that the performance of the whole radar system is restricted. For solving this problem, the embodiment of the utility model provides a millimeter wave radar receiving and dispatching system and radar utilizes first local oscillator on the first radar receiving and dispatching chip to produce and frequency doubling module as the frequency source, for two radar receiving and dispatching chips provide local oscillator signal, local oscillator signal passes through local oscillator transmission line transmission between two radar receiving and dispatching chips, and whole radar system has realized broadband frequency modulation, high-speed frequency modulation and high power output, has simplified radar system's design, has improved the integrated level, has reduced radar system's cost.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
An embodiment of the utility model provides a millimeter wave radar receiving and dispatching system, as shown in FIG. 1, should include: the first radar transceiver chip 110, the second radar transceiver chip 130 and the local oscillator transmission line 120.
Wherein:
the first radar transceiver chip 110 includes a first local oscillator generating and frequency doubling module 230 and a first local oscillator output port 270, where the first local oscillator generating and frequency doubling module 230 is configured to generate a local oscillator signal.
The second radar transceiver chip 130 includes a first local oscillator output port 211, a second local oscillator selection module 221, and a second local oscillator generation and frequency multiplication module 231, where the second local oscillator generation and frequency multiplication module 231 is turned off and does not output local oscillator signals to the outside of the chip; the first local oscillation output port 211 is connected to a first local oscillation output port 270 of the first radar transceiver chip 110 through the local oscillation transmission line 120.
The local oscillator transmission line 120 transmits the local oscillator signal to the second radar transceiver chip 130, and the second local oscillator selection module 221 transmits the local oscillator signal generated by the first local oscillator generation and frequency doubling module 230 to the second radar transceiver chip 130 for radar operation.
The embodiment of the utility model provides an in, two radar transceiver chips pass through local oscillator transmission line and cascade, realize a six passageway transmission (6T)/eight passageway millimeter wave radar transceiver system who receives (8R), signal throughput has been improved, utilize first local oscillator on the first radar transceiver chip to produce and frequency doubling module as the frequency source, provide local oscillator signal for two radar transceiver chips, local oscillator signal passes through local oscillator transmission line transmission between two radar transceiver chips, whole radar system has realized broadband frequency modulation, high speed modulation and high power output, radar system's design has been simplified, the integration level has been improved, radar system's cost has been reduced.
As shown in fig. 1, the first radar transceiver chip 110 includes a first local oscillator input port 210, a first local oscillator selection module 220, a first local oscillator generating and frequency doubling module 230, a first local oscillator power dividing module 240, a first four-channel receiving module 250, a first three-channel transmitting module 260, and a first local oscillator output port 270, when the first radar transceiver chip normally works, the first local oscillator generating and frequency doubling module 230 generates a local oscillator signal, the local oscillator signal is gated by the first local oscillator selection module 220 and transmitted to the first local oscillator power dividing module 240, the first local oscillator power dividing module 240 divides the signal power and transmits the divided signal to the first four-channel receiving module 250, the first three-channel transmitting module 260, and the first local oscillator output port 270, and the first local oscillator input port 210 is closed.
The second radar transceiver chip 130 is completely the same as the first radar transceiver chip 110, and includes a first local oscillator output port 211, a second local oscillator selection module 221, a second local oscillator generation and frequency multiplication module 231, a second local oscillator power division module 241, a second four-channel receiving module 251, a second four-channel receiving module 261, and a second local oscillator output port 271, when the radar apparatus normally works, the first local oscillator output port 211 is opened, the second local oscillator selection module 221 gates the local oscillator signal from the first local oscillator output port 211 and transmits the local oscillator signal to the second local oscillator power division module 241, the second local oscillator power division module 241 divides the signal power and then transmits the divided signal to the second four-channel receiving module 251 and the second four-channel receiving module 261, the second local oscillator generation and frequency multiplication module 231 is closed, and the second local oscillator output port 271 is closed.
The first local oscillation output port 270 is sequentially connected to the local oscillation transmission line 120 and the first local oscillation output port 211.
First radar transceiver chip 110 and second radar transceiver chip 130 may generate and transmit frequency modulated continuous waves having a bandwidth of 7.2GHz, a frequency modulation rate of greater than 300MHz/us, and a power of greater than 13 dBm.
In a specific implementation process, the first local oscillation power dividing module 240 includes a frequency source 320 module and a first frequency multiplier 310, the frequency source 320 module generates a local oscillation signal in a 19.25GHz frequency band, and the local oscillation signal is multiplied by the first frequency multiplier 310 to output in a 38.5GHz frequency band, and the second local oscillation power dividing module 241 is identical to the first local oscillation power dividing module 240.
In a specific implementation process, the first four-channel receiving module 250 includes a second frequency multiplier 330, a first power divider 340, and a four-channel millimeter wave receiving front end 350, where the second frequency multiplier 330 multiplies the frequency of the 38.5GHz band local oscillation signal from the local oscillation power divider module to a 77GHz band, and then the frequency is divided into four paths of 77GHz band local oscillation signals by the first power divider 340 to the four-channel millimeter wave receiving front end 350, and the second four-channel receiving module 251 is identical to the first four-channel receiving module 250.
In a specific implementation process, the first triple-channel transmitting module 260 includes a third frequency multiplier 360, a second power divider 370, and a triple-channel millimeter wave transmitting front end 380, where the third frequency multiplier 360 multiplies the frequency of the local oscillation signal in the 38.5GHz band from the local oscillation power divider module to a 77GHz band, and then the local oscillation signal is divided into three 77GHz band signals by the second power divider 370 and then sent to the triple-channel millimeter wave transmitting front end 380, and the second four-channel receiving module 261 is completely the same as the first triple-channel transmitting module 260. The first local oscillator power dividing module and the second local oscillator power dividing module work in a 38.5GHz frequency band, the first power divider and the second power divider work in a 77GHz frequency band, the sizes of the local oscillator power dividing module and the power dividers are related to signal frequency, the higher the frequency is, the smaller the size is, but for chip design, the higher the frequency is, the larger the transmission loss is, and by adopting the structure, the high output power, the large scanning bandwidth and the small size of the system can be considered at the same time.
In a specific implementation process, the four-channel millimeter wave receiving front end 350 includes four identical millimeter wave receiving front ends, each millimeter wave receiving front end includes a millimeter wave input port 410, a millimeter wave low noise amplifier 420, a millimeter wave mixer 430, a local oscillation signal driver amplifier 440, a local oscillation signal driver amplifier 450, an analog-to-digital converter 460, and a digital output port 470, the millimeter wave input port 410 is sequentially connected to the millimeter wave low noise amplifier 420 and the millimeter wave mixer 430, the millimeter wave mixer 430 is further sequentially connected to the local oscillation signal driver amplifier 450, the analog-to-digital converter 460, and the digital output port 470, the millimeter wave mixer 430 is further connected to the local oscillation driver amplifier, and the local oscillation driver amplifier is further connected to the first power divider 340.
In a specific implementation process, the three-channel millimeter wave transmission front end 380 includes three identical millimeter wave transmission front ends, each millimeter wave transmission front end includes a millimeter wave phase shifter 510, a millimeter wave power amplifier 520, and a millimeter wave output port 530, the millimeter wave phase shifter 510 is connected to the second power divider 370, and the millimeter wave phase shifter 510 is further connected to the millimeter wave power amplifier 520 and the millimeter wave output port 530 in sequence.
The first local oscillation signal generating and frequency doubling module generates a local oscillation signal, and the local oscillation signal is transmitted to the first four-channel receiving module 250, the first three-channel transmitting module 260, the second four-channel receiving module 251, and the second four-channel receiving module 261 respectively through the first local oscillation selecting module 220, the first local oscillation power dividing module 240, the first local oscillation output port 270, the local oscillation transmission line 120, the first local oscillation output port 211, the second local oscillation selecting module 221, and the second local oscillation power dividing module 241.
The first three-channel transmitting module 260 and the second four-channel receiving module 261 transmit beams, when the transmitted beams encounter an obstacle, echoes reflected by the obstacle are received by the first four-channel receiving module 250 and the second four-channel receiving module 251, and received signals are converted into digital baseband signals containing obstacle distance, speed and angle information after frequency mixing, filtering amplification and analog-to-digital conversion.
In the above process, the local oscillator signal is a frequency modulated continuous wave, and the formula of the distance resolution of the frequency modulated continuous wave radar for detecting the obstacle is as follows:
wherein: c denotes the speed of light and B denotes the bandwidth of the frequency modulated continuous wave. Therefore, the larger the bandwidth of the frequency modulation continuous wave is, the higher the distance resolution is, and for the close distance perception sensor, the distance resolution needs to reach the centimeter level.
Fig. 2 is a frequency spectrum diagram of a transmission signal bandwidth according to an embodiment of the present invention. As shown in fig. 2, the abscissa represents the transmit frequency and the ordinate represents the transmit signal power (uncalibrated). As can be seen from FIG. 2, the frequency modulation continuous wave bandwidth of the transmitted signal can reach 7.2GHz, the distance resolution can reach 2.08 cm according to the formula (1), and the requirement of the proximity sensor is met.
In order to obtain a faster processing speed, the frequency modulation time of each frequency modulation is as short as possible, so that when the frequency modulation bandwidth is higher, the faster the frequency modulation speed is, the shorter the frequency modulation time is. For a short-distance typical application scene, the frequency modulation time is controlled within 30 us.
Fig. 3 is a waveform diagram of the frequency modulation frequency of the transmission signal varying with time according to an embodiment of the present invention. As shown in fig. 3, the abscissa represents time and the ordinate represents frequency modulation frequency. As can be seen from FIG. 3, the frequency modulation speed of the transmitted signal can reach over 300MHz/us, and when the frequency modulation bandwidth is 7.2GHz, the frequency modulation time only needs 24us, so that the requirement of the proximity sensor is met.
Suppose that the radar emission cross-sectional area of an automobile is 10m2If the radar detection target distance is R and the transmitting antenna gain is 20dBi, then the power of the received signal is:
PR,dBm≈PT,dBm-31-40lg R (2)
fig. 4 is a graph of the output power of the transmission signal varying with frequency according to the embodiment of the present invention. As shown in fig. 4, the abscissa is frequency and the ordinate is transmission power. Can know by figure 4, the embodiment of the utility model provides an in 72 ~ 81GHz frequency channel launch power be greater than 13dBm, can satisfy the radar sensor demand of closely.
The embodiment of the utility model provides a millimeter wave radar is still provided, and this radar includes above-mentioned millimeter wave radar system.
In summary, compared with the prior art, the method has the following beneficial effects:
the embodiment of the utility model provides a pass through local oscillator transmission line through two radar transceiver chips and cascade, realize a millimeter wave radar receiving and dispatching system that six passageway transmission (6T)/eight passageway received (8R), can be used to scenes such as near field formation of image, vital sign detection, gesture recognition, improved signal throughput. The first local oscillator generation and frequency multiplication module on the first radar transceiver chip is used as a frequency source to provide local oscillator signals for the two radar transceiver chips, the local oscillator signals between the two radar transceiver chips are transmitted through the local oscillator transmission line, the whole radar system realizes broadband frequency modulation, high-speed frequency modulation and high-power output, the design of the radar system is simplified, the integration level is improved, and the cost of the radar system is reduced.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A millimeter-wave radar transmission/reception system, comprising:
the first radar receiving and transmitting chip comprises a first local oscillator generating and frequency doubling module and a first local oscillator output port, wherein the first local oscillator generating and frequency doubling module is used for generating local oscillator signals;
the second radar receiving and transmitting chip comprises a second local oscillator input port, a second local oscillator selection module and a second local oscillator generation and frequency multiplication module, wherein the second local oscillator generation and frequency multiplication module is closed and does not output local oscillator signals to the outside of the chip;
the local oscillator transmission line is connected with the first local oscillator output port and the second local oscillator input port;
the local oscillator transmission line transmits the local oscillator signals to a second radar receiving and transmitting chip, and the second local oscillator selection module transmits the local oscillator signals to the chip for radar work.
2. The millimeter-wave radar transceiving system of claim 1, wherein the first radar-transceiving chip further comprises:
the system comprises a first local oscillator input port, a first local oscillator selection module, a first local oscillator power division module, a first four-channel receiving module and a first three-channel transmitting module; when the local oscillator power dividing module normally works, the first local oscillator generating and frequency doubling module generates local oscillator signals, the local oscillator signals are transmitted to the first local oscillator power dividing module after being gated by the first local oscillator selecting module, the first local oscillator power dividing module divides the signal power and then transmits the signal power to the first four-channel receiving module, the first three-channel transmitting module and the first local oscillator output port respectively, and the first local oscillator input port is closed.
3. The millimeter-wave radar transceiving system of claim 1, wherein the second radar transceiving chip further comprises:
the second local oscillator power division module, the second four-channel receiving module, the second three-channel transmitting module and the second local oscillator output port; when the frequency doubling module works normally, the second local oscillator input port is opened, the second local oscillator selection module gates local oscillator signals from the second local oscillator input port and transmits the local oscillator signals to the second local oscillator power division module, the second local oscillator power division module divides the signals and transmits the divided signals to the second four-channel receiving module and the second three-channel transmitting module respectively, the second local oscillator generation and frequency doubling module is closed, and the second local oscillator output port is closed.
4. The millimeter wave radar transceiver system of claim 2, wherein the first local oscillator generation and frequency multiplication module comprises a frequency source and a first frequency multiplier, the frequency source generates a local oscillator signal in a 19.25GHz band, and the local oscillator signal is multiplied by the first frequency multiplier to output in a 38.5GHz band.
5. The millimeter-wave radar transceiver system of claim 2, wherein the first four-channel receiving module comprises a second frequency multiplier, a first power divider, and a four-channel millimeter-wave receiving front end, the second frequency multiplier multiplies the frequency of the local oscillator signal in the 38.5GHz band from the local oscillator power divider module to the 77GHz band, and the local oscillator signal is divided into four paths of local oscillator signals in the 77GHz band by the first power divider to the four-channel millimeter-wave receiving front end.
6. The millimeter-wave radar transceiver system of claim 2, wherein the first triple-channel transmitter module comprises a third frequency multiplier, a second power divider, and a triple-channel millimeter-wave transmitter front end, wherein the third frequency multiplier multiplies the frequency of the local oscillator signal in the 38.5GHz band from the local oscillator power divider module to the 77GHz band, and the frequency is divided into three 77GHz band signals by the second power divider to be transmitted to the triple-channel millimeter-wave transmitter front end.
7. The millimeter-wave radar transceiver system of claim 5, wherein the four-channel millimeter-wave reception front end comprises four identical millimeter-wave reception front ends, each millimeter-wave reception front end comprises a millimeter-wave input port, a millimeter-wave low-noise amplifier, a millimeter-wave mixer, a local oscillator signal driver amplifier, an analog baseband circuit module, an analog-to-digital converter, and a digital output port, the millimeter-wave input port is sequentially connected to the millimeter-wave low-noise amplifier and the millimeter-wave mixer, the millimeter-wave mixer is further sequentially connected to the analog baseband circuit module, the analog-to-digital converter, and the digital output port, the millimeter-wave mixer is further connected to the local oscillator driver amplifier, and the local oscillator driver amplifier is further connected to the first power divider.
8. The millimeter-wave radar transceiver system of claim 6, wherein the three-channel millimeter-wave transmit front end comprises three identical millimeter-wave transmit front ends, each millimeter-wave transmit front end comprising a millimeter-wave phase shifter, a millimeter-wave power amplifier, and a millimeter-wave output port, the millimeter-wave phase shifter being connected to the second power divider, the millimeter-wave phase shifter being further connected to the millimeter-wave power amplifier and the millimeter-wave output port in sequence.
9. The millimeter wave radar transceiver system according to any one of claims 1 to 8, wherein the second radar transceiver chip and the first radar transceiver chip have the same structure.
10. A millimeter-wave radar comprising the millimeter-wave radar transmission/reception system according to any one of claims 1 to 9.
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| CN202120359824.3U CN214845749U (en) | 2021-02-06 | 2021-02-06 | Millimeter wave radar transmitting and receiving system and radar |
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