CN210835228U - Small-size imaging radar radio frequency transceiver module - Google Patents
Small-size imaging radar radio frequency transceiver module Download PDFInfo
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- CN210835228U CN210835228U CN201921413734.7U CN201921413734U CN210835228U CN 210835228 U CN210835228 U CN 210835228U CN 201921413734 U CN201921413734 U CN 201921413734U CN 210835228 U CN210835228 U CN 210835228U
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Abstract
The utility model provides a small-size imaging radar radio frequency transceiver module, including integrated chip, power, synchronizing circuit and LO local oscillator circuit, integrated chip includes a main chip and three from the chip, be first from the chip respectively, second from the chip, third from the chip and main chip, be provided with receiving antenna, sending antenna and the transmitter that is used for sending data to the host processor on first from the chip, second from the chip, third from the chip and the main chip respectively, synchronizing circuit and LO local oscillator circuit are connected respectively on integrated chip, synchronizing circuit includes digital synchronization circuit and clock synchronization circuit, integrated chip connects on the power, be provided with the power conversion chip in the power, the power conversion chip includes four step-down direct current or direct current converter kernels, direct current converter kernel is 4 single-phase outputs, the utility model discloses under bad weather, the driving safety factor of the vehicle is greatly improved by providing high resolution images of static and dynamic objects.
Description
Technical Field
The utility model relates to the wireless communication technology field, concretely relates to small-size formation of image radar radio frequency transceiver module.
Background
The ADAS (advanced driving assistance system) of a vehicle also includes whether the vehicle is parked safely or whether the lane can be changed, and provides control functions such as automatic cruising, etc., such as keeping the vehicle at a constant distance from a preceding vehicle or tracking the speed of the preceding vehicle, preventing accidents such as collision due to driver's carelessness, etc., by observing the area in front of the vehicle, and giving an alarm to the ADAS subsystem if an obstacle that is likely to hit the vehicle is observed. Implementing these techniques requires various sensors to detect obstacles in various environments and track their changes in speed and position over time.
Frequency Modulated Continuous Wave (FMCW) radar can accurately measure the distance between an obstacle and a vehicle and the relative velocity between them, and thus, radar plays a critical role (autopilot and collision avoidance) in autopilot (e.g., assisted parking and assisted lane change) and car safety applications. An important advantage of radar over cameras and light detection is that radar can measure in complex and harsh environments (e.g., the effects of rain, dust, and smoke). FMCW (frequency modulated continuous wave) radars can operate in environments of complete darkness or bright sunlight (radars are not affected by glare) because they transmit and receive electromagnetic waves. Radars generally have a longer measurement range and a faster speed to transmit their signals than ultrasonic waves. Despite the many advantages of radar technology, in many cases today's automotive manufacturers still use camera sensors as the primary sensor technology to apply to the safety issues of vehicles. The radar sensor acts as a secondary sensor meaning that when a radar warning is received by the vehicle system, action can only be taken if the camera sensor is verified, primarily due to limitations in the radar angular resolution. Radar sensors on most vehicles today lack the ability to distinguish between static objects with the same distance and the same relative velocity.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims at not enough in the prior art, provide a small-size formation of image radar radio frequency transceiver module, can improve the factor of safety that traveles of vehicle through the high resolution image that provides static and dynamic object under the bad weather condition.
The technical scheme is as follows: in order to achieve the above object, the utility model provides a small-size formation of image radar radio frequency transceiver module, its characterized in that: the integrated chip comprises a main chip and three slave chips, namely a first slave chip, a second slave chip, a third slave chip and the main chip, wherein the first slave chip, the second slave chip, the third slave chip and the main chip are respectively provided with a receiving antenna, a sending antenna and a transmitter for sending data to a main processor, the synchronous circuit and the LO local oscillator circuit are respectively connected onto the integrated chip, the synchronous circuit comprises a digital synchronous circuit and a clock synchronous circuit, the integrated chip is connected onto the power supply, the power supply is provided with a power supply conversion chip, the power supply conversion chip comprises four voltage-reducing direct current or direct current converter cores, and the direct current converter cores are 4 single-phase outputs.
As an improvement of the scheme, the integrated chip further comprises a digital test panel and a connector, the integrated chip is connected with the digital test panel through the connector, and the control signals and the reset signals of the first slave chip, the second slave chip, the third slave chip and the master chip are connected to the digital test panel through the connector.
As an improvement of this solution, an LO local oscillation circuit, a digital synchronization circuit, and a clock synchronization circuit are respectively disposed between the first slave chip, the second slave chip, and the third slave chip and the master chip.
As an improvement of the scheme, the LO local oscillator circuit includes an amplifying circuit, a filtering circuit, a two-stage power divider, an amplifying circuit, and a filtering circuit, where a signal input by a local oscillator enters the power divider to divide the signal into two parts through attenuation, power amplification, attenuation, and filtering, the two same signals that have been power divided are divided into two parts through the two same power dividers to form four same signals, and the four same local oscillator signals obtained through attenuation, power amplification, and filtering are provided to the first slave chip, the second slave chip, the third slave chip, and the master chip, respectively.
As an improvement of this solution, the transmitting antenna and the receiving antenna respectively constitute 12 transmitting string unit antennas and 16 receiving string unit antennas, and the transmitting antenna and the receiving antenna on the first slave chip, the second slave chip, the third slave chip and the master chip are respectively 3 transmitting antennas and 4 receiving antennas.
As a modification of this solution, the first slave chip, the second slave chip, the third slave chip and the master chip are all arranged at 45 ° and at equal intervals.
As an improvement of the scheme, a reserved local vibration source interface and a clock interface are arranged outside the radio frequency transceiving module and are connected to the connector.
As an improvement of this solution, the clock interface is 40 MHz.
Has the advantages that: the utility model discloses in form the radio frequency transceiver module who cascades formation of image radar through a four-chip cascade solution, compare sensor advantage before and lie in: the radar becomes a main sensor of the vehicle, not a secondary sensor, under the condition of severe weather, the driving safety factor of the vehicle is improved by providing high-resolution images of static and dynamic objects, the application range is wider, and the life quality of people is effectively improved.
Drawings
FIG. 1 is a schematic structural diagram of a radio frequency transceiver module of a small imaging radar;
FIG. 2 is a cascade structure diagram of a master chip XA1243P and a slave 1XA 1243P;
FIG. 3 is a connection diagram of a 2 XA1243P chip structure;
FIG. 4 is a connection diagram of a 3 XA1243P chip structure;
FIG. 5 is a view showing a connection relationship between a signal line and a connector;
FIG. 6 is a schematic block diagram of a local oscillator circuit;
FIG. 7 is a block diagram of a design of a power supply;
FIG. 8 shows the position relationship between the antenna set and the integrated chip;
FIG. 9 is a simulation model diagram of a serial unit antenna in a T/R (transmit/receive) antenna array;
FIG. 10 is a side view of a simulation model;
FIG. 11 is a two-dimensional pattern of string elements;
FIG. 12 is a diagram of a simulation model of a 3T (3-shot) antenna array;
FIG. 13 is a two-dimensional pattern for a 3T (3-shot) antenna array simulation;
FIG. 14 is a diagram of a simulation model of a 4R (4 receive) antenna array;
fig. 15 is a two-dimensional pattern of a 4R (4 receive) antenna array simulation.
List of reference numerals: 1. a receiving antenna; 2. a transmitting antenna; 3. a patch string unit; 4. a reference ground; 5. a dielectric plate.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and embodiments, which are to be understood as illustrative only and not limiting the scope of the invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in fig. 1-15, the Slave1 is a first Slave chip, the Slave2 is a second Slave chip, the Slave3 is a third Slave chip, the Slave4 is a fourth Slave chip, the Master is a Master chip, the TX is a receiving antenna 1, and the RX is a transmitting antenna 2.
A small imaging radar radio frequency transceiver module is formed by cascading four XA1243P chips and further comprises a power supply, a clock synchronization circuit, a digital synchronization circuit and an LO circuit, wherein four XA1243P integrated chips are divided into a master chip and a slave chip in the small imaging radar radio frequency transceiver module, the master chip and the first slave chip, the second slave chip and the third slave chip are respectively, the XA1243P chip is an integrated single-chip FMCW (frequency modulated continuous wave) transceiver capable of operating in a frequency band of 76 to 81GHz, and the chip achieves unprecedented integration level in a tiny package. XA1243P is an ideal solution for low power consumption, self-monitoring, ultra-precise radar systems suitable for automotive applications, implementing a single-chip implementation 3TX, 4RX system with built-in PLLs and analog-to-digital converters, simple programming model modifications that support various sensor implementations including close, mid, and long range sensors and that can be dynamically reconfigured to implement multimode sensors, each transmitter of each XA1243P chip including a programmable 6-bit phase shifter with 5.625 degree step lengths that allow beam forming, the sensor including a built-in radio processor BIST for radio frequency calibration and safety monitoring.
An LO local oscillator circuit, a clock synchronization circuit and a digital synchronization circuit are arranged in a Master chip, a 20GHz LO local oscillator circuit, a 40MHz clock synchronization circuit and a digital synchronization circuit are respectively provided, LO local oscillator output of the Master chip is respectively used for synchronizing A, B, C to other three slave chips, a clock synchronization output signal D, E of the Master chip is synchronized to other three slave chips, digital synchronization output of the Master chip is respectively used for synchronizing F, G, H to other three slave chips, RX and TX antennas of four XA1243P chips are connected with a group of etching patch antennas on a radio frequency transceiver board through microstrip lines, the four chip chips totally create 12 TX transmitting channels and 16 RX receiving channels which are respectively used for transmitting and receiving signals and can realize beam forming and multi-input and multi-output operation of an array, four XA 3 124 1243P on the radio frequency transceiver module respectively comprise a 4-port CSI2.0 transmitter, for sending radar data to the host processor, each XA1243P on-chip control signal and reset signal may be connected to the FMC connector, to the digital test panel behind.
The distribution of 20GHz LO local oscillation circuits of an XA1243P chip is realized by an amplifying, filtering, two-stage power division, amplifying and filtering link, the width of a middle microstrip transmission line is calculated according to a selected dielectric plate 5 material, the link is connected by using the microstrip transmission line, a local oscillation signal is output from an output end of a main chip XA1243P by a two-stage power divider and is respectively input to local oscillation input ends of four XA1243P chips, clock synchronization and digital synchronization are output and input in the same mode, an LO local oscillation signal of 7dBm is input, the LO local oscillation signal enters a power divider to divide the signal into two parts by attenuation, power amplification, attenuation and filtering, two same signals which are subjected to power division are respectively divided into two parts by two same power dividers, so four same signals are obtained, and four same local oscillation signals which are respectively obtained by attenuation, power amplification and filtering are respectively provided for a first slave chip, a second slave chip, a third chip and a power divider, The second slave chip, the third slave chip and the master chip.
The required voltage of the XA1243P chip is respectively 3.3V, 1.8V, 1.3V and 1.0V, the voltage conversion is carried out by a power conversion chip, the power conversion chip LP87524J is selected, the LP87524J chip comprises four step-down direct current or direct current converter cores, the cores are configured to be 4 single-phase outputs, 5V voltage can be converted into four voltages required by an XA1243P chip, two LP87524 power conversion chips are selected to drive four XA1243P chips, the radar radio frequency transceiver module and the digital test board are connected through a connector FMC, the voltage provided by the connector FMC to the small radar radio frequency transceiver module is 12V, a LTM4628J is selected to convert the 12V voltage into 5V, through the calculation of the current, one LP87524J power supply chip can supply power to 2 XR1243 chips, so that 12V voltage is connected to the digital test panel by providing 2 LP87524J power chips to convert to two sets of 5V voltage for XA1243P chips.
In order to ensure equal phase distribution, namely the receiving antenna 1 and the transmitting antenna 2 are in equal phase distribution and prevent deviation, waveguide feeders of the antennas are required to be equal in length, four XA1243P chips are placed at 45 degrees and sequentially comprise a main chip, a first slave chip, a second slave chip and a third slave chip from bottom to top and are arranged at equal intervals, each XA1243P chip is connected with 3TX and 4TR antenna arrays through a waveguide feeder line, wherein the antenna arrays formed by three transmitting antenna 2 serial units and four receiving antenna 1 serial units are respectively used for transmitting and receiving microwave signals, and the intervals among all antenna serial units are 2mm, so that the whole small imaging radar radio frequency transceiver module comprises 12 transmitting serial unit antennas and 16 receiving serial unit antennas.
In addition, in order to cascade chip extension, a local oscillator interface and a 40MHz clock interface are reserved outside and connected to the FMC connector.
The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by the arbitrary combination of the above technical features.
Claims (8)
1. A small-size formation of image radar radio frequency transceiver module which characterized in that: the integrated circuit comprises an integrated chip, a power supply, a synchronous circuit and an LO (local oscillator) circuit, wherein the integrated chip comprises a main chip and three slave chips which are respectively a first slave chip, a second slave chip, a third slave chip and the main chip, the first slave chip, the second slave chip, the third slave chip and the main chip are respectively provided with a receiving antenna (1), a sending antenna and a transmitter for sending data to the main processor, the synchronous circuit and the LO circuit are respectively connected to the integrated chip, the synchronous circuit comprises a digital synchronous circuit and a clock synchronous circuit, the integrated chip is connected to the power supply, the power supply is provided with a power supply conversion chip, the power supply conversion chip comprises four voltage reduction direct current or direct current converter cores, and the direct current converter cores are 4 single-phase outputs.
2. The compact imaging radar radio frequency transceiver module of claim 1, wherein: the integrated chip is connected with the digital test panel through the connector, and the control signals and the reset signals of the first slave chip, the second slave chip, the third slave chip and the master chip are connected to the digital test panel through the connector.
3. The compact imaging radar radio frequency transceiver module of claim 1, wherein: an LO local oscillator circuit, a digital synchronization circuit and a clock synchronization circuit are respectively arranged between the first slave chip, the second slave chip, the third slave chip and the master chip.
4. The compact imaging radar radio frequency transceiver module of claim 1, wherein: the LO local oscillator circuit comprises amplification, filtering, two-stage power division, amplification and filtering, wherein signals input by local oscillators enter the power divider to divide the signals into two parts after attenuation, power amplification, attenuation and filtering, the two same signals which are subjected to power division are divided into two parts by the two same power dividers to form four same signals, and the four same local oscillator signals are obtained through attenuation, power amplification and filtering and are provided for the first slave chip, the second slave chip, the third slave chip and the master chip respectively.
5. The compact imaging radar radio frequency transceiver module of claim 1, wherein: the transmitting antenna and the receiving antenna (1) respectively form 12 transmitting string unit antennas and 16 receiving string unit antennas, and the transmitting antenna (2) and the receiving antenna (1) on the first slave chip, the second slave chip, the third slave chip and the main chip are respectively 3 transmitting antennas (2) and 4 receiving antennas (1).
6. The compact imaging radar radio frequency transceiver module of claim 1, wherein: the first slave chip, the second slave chip, the third slave chip and the master chip are all arranged at 45 degrees and at equal intervals.
7. The compact imaging radar radio frequency transceiver module of claim 1, wherein: the radio frequency transceiving module is externally provided with a reserved local vibration source interface and a clock interface, and the reserved local vibration source interface and the clock interface are connected to the connector.
8. The compact imaging radar radio frequency transceiver module of claim 7, wherein: the clock interface is 40 MHz.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921413734.7U CN210835228U (en) | 2019-08-28 | 2019-08-28 | Small-size imaging radar radio frequency transceiver module |
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| CN201921413734.7U CN210835228U (en) | 2019-08-28 | 2019-08-28 | Small-size imaging radar radio frequency transceiver module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501703A (en) * | 2019-08-28 | 2019-11-26 | 南京德睿智芯电子科技有限公司 | A kind of small-sized imaging radar RF receiving and transmission module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501703A (en) * | 2019-08-28 | 2019-11-26 | 南京德睿智芯电子科技有限公司 | A kind of small-sized imaging radar RF receiving and transmission module |
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