WO2020215181A1

WO2020215181A1 - Phased array transmitting array, phased array receiving array, radar and intelligent sensing device

Info

Publication number: WO2020215181A1
Application number: PCT/CN2019/083694
Authority: WO
Inventors: 牛犇
Original assignee: 深圳市速腾聚创科技有限公司
Priority date: 2019-04-22
Filing date: 2019-04-22
Publication date: 2020-10-29
Also published as: CN110741277A

Abstract

The present application relates to the technical field of radars, and disclosed thereby are a phased array transmitting array, a radar and an intelligent sensing device. The phased array transmitting array comprises: an output source; N transmitting units; M beam splitters arranged in a stage-by-stage manner, connected to the output source, and used to perform stage-by-stage beam splitting on light outputted by the output source to obtain N-path detection media, each path detection medium being incident on one of the transmitting units; and P phase modulators, wherein an input end of one of the phase modulators is connected to an output end of one of the beam splitters, an output end of at least one of the phase modulators is connected to an input end of one of the beam splitters, output ends of the remaining phase modulators are connected to input ends of the transmitting units respectively, and the P phase modulators are used to perform phase modulation on the detection media outputted by the beam splitters so that the N-path detection media meet a preset interference condition. By means of the described method, the sum of phases for phase modulation required by the phase modulators in the phased array transmitting array is reduced, thereby reducing the total power required by the phase modulators.

Description

Phased array transmitting array, phased array receiving array, radar and intelligent sensing equipment

Technical field

This application relates to the field of radar technology, in particular to a phased array transmitting array, a phased array receiving array, radar and intelligent sensing equipment.

Background technique

Lidar is a radar system that emits laser beams to detect feature vectors such as the position and speed of a target. It is widely used in technical fields such as atmospheric detection, urban surveying and mapping, ocean detection, autonomous driving, robotics, laser television, and laser three-dimensional imaging.

At present, lidar is divided into mechanical lidar, phased array lidar, MEMS (Micro-Electro-Mechanical System) lidar. Mechanical lidar drives the radar system to rotate 360 degrees through a mechanical rotating structure to achieve 360-degree detection, the detection accuracy and reliability of this type of lidar will be affected by the mechanical rotating structure. The phased array lidar does not need a mechanical rotation structure, but the beams emitted by multiple emitting units interfere in space to form a far-field beam, and the far-field beam is used to achieve object detection, and then the emission unit is adjusted to emit The size of the phase difference of the light, to adjust the direction of the far-field beam, so as to achieve 360-degree scanning. Since the laser radar based on the optical phased array can be mass-produced through the semiconductor process, the unit cost is much lower than that of the mechanical laser radar, and the mechanical laser radar will cause reliability problems due to rotation during use. Therefore, more and more industries use Phased array lidar is used as a tool for object detection.

However, in the process of implementing the present application, the inventor of the present application found that: as shown in FIG. 1, currently, in order to realize that the beams emitted by the multiple transmitting units 14 of the phased array lidar meet the predetermined phase difference, usually each The phase modulator 13 is arranged in front of the transmitting unit 14, and the phase is adjusted before the light beam enters the transmitting unit 14. However, this phase modulation method will make the total phase modulation of each phase modulator 13 reach

When N is very large, the number of transmitting units is very large, the total phase modulation of the phase modulator 13 is very large, and the power required by the phase modulator 13 is very large.

Summary of the invention

The purpose of the embodiments of this application is to provide a phased array transmitting array, phased array receiving array, radar, and intelligent sensing equipment, which reduces the phase of the phase modulator in the phased array transmitting array or the phased array receiving array. Sum, thereby reducing the total power required by the phase modulator.

According to one aspect of the embodiments of the present application, there is provided a phased array emission array, including: an output source; J emission units; M beam splitters, the M beam splitters are arranged in stages, and are combined with the The output source connection is used to split the detection medium output by the output source step by step to obtain J detection mediums, and each detection medium is incident on one of the emission units; P phase modulators, one phase modulation The input end of the phase modulator is connected to the output end of the beam splitter, the output end of at least one of the phase modulators is connected to the input end of one beam splitter, and the output ends of the remaining phase modulators are connected to the transmitter respectively. The input end of the unit is connected, and the P phase modulators are used to phase modulate the detection medium output by the beam splitter, so that the N detection mediums meet the preset interference condition, wherein, the J and M are both Is a natural number greater than 2, and the P is a natural number greater than 1.

In an optional manner, K-1 output terminals of the K output terminals of each beam splitter are respectively connected to the input terminals of K-1 phase modulators, and the K is a natural number greater than 1. .

In an optional manner, the step-by-step setting of the M beam splitters is specifically: in addition to the beam splitter that receives the detection medium of the output source, some of the beam splitters in the remaining beam splitters The input end is connected to an output end of another beam splitter, and the input end of a part of the beam splitter is connected to the output end of another beam splitter through a phase modulator.

In an optional manner, the number of beam splitters at each level is K ^T-1 , the T is the level of the beam splitter, and the T is a natural number greater than 1, and the K is the splitter. The number of output terminals of the beamer.

In an optional manner, the preset interference condition is that the phase difference of the J-channel detection medium is 0 to

The N is the number of levels of the beam splitter (22).

In an optional manner, the J emitting units are arranged in an array, and the distance between any two adjacent emitting units is the same.

In an optional manner, the phased array emitting array further includes a base and J thermally conductive pads; the J emitting units are all fixed on the base, and each of the thermally conductive pads is disposed on a emitting unit Between and the base.

In an optional manner, the base is provided with a heat dissipation channel, the fan is provided at one end of the heat dissipation channel, and the other end of the heat dissipation channel communicates with the outside.

According to another aspect of the embodiments of the present application, there is provided a phased array receiving array, including: a receiver; X receiving units; Y beam combiners, the Y beam combiners are arranged step by step, and the The receiver connection is used to combine the detection medium received by the X receiving units; Z phase modulators, an output end of the phase modulator is connected to an input end of the beam combiner, The input end of at least one of the phase modulators is connected to the output end of a beam combiner, the input ends of the remaining phase modulators are respectively connected to the output end of the receiving unit, and the Z phase modulators are used to Each receiving unit receives the detection medium for phase modulation.

In an optional manner, the Q-1 input terminals of the Q input terminals of each of the beam combiners are respectively connected to the output terminals of the Q-1 phase modulators, and the Q is a natural number greater than 1. .

In an optional manner, the step-by-step setting of the Y beam combiners is specifically: in addition to the beam combiner connected to the receiver, the input of some of the beam combiners in the remaining beam combiners The end is connected with the output end of another beam combiner, and the input end of part of the beam combiner is connected with the output end of another beam combiner through the phase modulator.

In an optional manner, the number of beam combiners at each level is H ^G-1 , the G is the level of the beam combiner, and the G is a natural number greater than 1, and the G is the combiner. The number of input ends of the beamer.

According to another aspect of the embodiments of the present application, a radar is provided, which includes the phased array transmitting array and the phased array receiving array as described above.

According to another aspect of the embodiments of the present application, there is provided an intelligent sensing device, including the aforementioned radar.

In the embodiment of the present application, by pre-positioning at least one phase modulator in the phased array transmitting array between two beam splitters, the at least one pre-phase modulator pair is transmitted from one beam splitter to Phase adjustment of the detection medium of another beam splitter can realize that the detection medium entering the other beam splitter has the phase adjusted by the phase modulator, thereby making the detection separated by the other beam splitter The medium has the phase adjusted by the phase modulator to realize the unified phase adjustment of the detection medium separated by the beam splitter. When the detection medium separated by the beam splitter is subsequently re-phase adjusted, it can be based on The adjustment is made on the basis of the phase adjusted by the phase modulator. The amplitude of the phase to be adjusted by the subsequent phase modulator is greatly reduced, which is conducive to reducing the power of the subsequent phase modulator, thereby reducing the total required by all phase modulators. power.

Description of the drawings

One or more embodiments are exemplified by the pictures in the corresponding drawings. These exemplified descriptions do not constitute a limitation on the embodiments. Elements with the same reference numbers in the drawings are represented as similar elements. Unless otherwise stated, the figures in the attached drawings do not constitute a limitation of scale.

Fig. 1 is a schematic diagram of a phased array transmitting array in the prior art;

Figure 2 is a schematic diagram of an embodiment of a phased array transmitting array of the present application;

3 is a schematic diagram of the secondary beam splitting in the embodiment of the phased array transmitting array of the present application;

4 is a schematic diagram of three-stage beam splitting in an embodiment of a phased array transmitting array of the present application;

5 is a schematic diagram of another embodiment of the phased array transmitting array of the present application;

6 is a schematic diagram of the connection between the base and the transmitting unit in the embodiment of the phased array transmitting array of the present application;

FIG. 7 is a schematic diagram of an embodiment of a phased array receiving array of the present application;

Fig. 8 is a schematic diagram of an embodiment of the radar of the present application.

Detailed ways

The embodiments of the technical solution of the present application will be described in detail below in conjunction with the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, and therefore are only used as examples, and cannot be used to limit the protection scope of the present application.

Please refer to FIG. 2, which is a schematic diagram of an embodiment of a phased array emission array of the present application. The phased array emission array 20 includes an output source 21, M beam splitters 22, P phase modulators 23 and J emission units 24. The J and M are both natural numbers greater than 2, and the P is a natural number greater than 1. The output source 21 is used to output the detection medium, and the M beam splitters 22 are used to split the detection medium output by the output source 21 to obtain J detection mediums. Each detection medium is incident on a transmitting unit 24, and the transmitting unit 24 emission. The P phase modulators 23 are used to phase-modulate at least J-1 detection media, so that the J detection media meet the preset interference condition, so that the detection media emitted by the J launch units 24 are in space Interfere with each other to form a beam of far-field detection medium.

For the above-mentioned output source 21, the output source 21 can be selected as a laser light source, and the detection medium is a beam, and the laser light source can be: a ruby laser, a neodymium-doped yttrium aluminum garnet laser, a helium-neon laser, an argon ion laser, and a chip integrated Lasers, etc. In other embodiments, the output source 21 may be a sound source, and the detection medium is a sound wave; or, if the output source 21 is an electromagnetic wave generator, the detection medium is an electromagnetic wave.

For the aforementioned M beam splitters 22, the input end of one beam splitter 22 is connected to the output source 21, and the input end of some of the other beam splitters 22 is connected to the output end of another beam splitter 22, and some The beam splitter 22 is connected to the output end of another beam splitter 22 through the phase modulator 23, so that the M beam splitters 22 are arranged in stages. Among them, the beam splitter 22 connected to the output source 21 is a first-stage beam splitter, the beam splitter connected to the first beam splitter is a second-stage beam splitter, and the beam splitter connected to the second-stage beam splitter The beam splitter 22 is a third-stage beam splitter. By analogy, the last-stage beam splitter is connected to the transmitting unit 24. Therefore, the number of beam splitters in each stage is gradually increased from the first stage to the subsequent stage. The number of detection media also increases gradually from the first level to the back. For example: when the beam splitter is a two-channel beam splitter, one light output from the output source 21 first enters the first-stage beam splitter. Because the first-stage beam splitter performs beam splitting processing to obtain two detection mediums, the two-channel detection The medium is respectively input to the second-stage beam splitter, and then each second-stage beam splitter performs beam splitting processing to obtain four-channel detection medium, and the four-channel detection medium is input to the third-stage beam splitter for beam splitting to obtain eight channels Detect the medium, transmit and split the beams in this order, and finally get the J beam of the detection medium.

It is worth noting that: M beam splitters 22 can be selected as beam splitters that separate the same number of detection media, for example: all are two-way beam splitters, all are three-way beam splitters, and all are four-way beam splitters Etc., since the performance consistency of the two detection media separated by the two beam splitters is relatively good, therefore, in this embodiment, the M beam splitters 22 are preferably two beam splitters. When the M beam splitters 22 are beam splitters that separate the same number of detection media, the number of beam splitters in each stage is K ^T-1 , T is the level of the beam splitter 22, and the N is A natural number greater than 1, K is the number of detection media that can be separated by the beam splitter 22, and the K is a natural number greater than 1. For example, when the beam splitter 22 is a two-way beam splitter, that is, when K=2, the first stage The number of beam splitters is one, the number of second-level beam splitters is 2, the number of third-level beam splitters is 8, and the number of ^T- th beam splitters is 2 ^T-1 . The phases that need to be adjusted for the two output detection media are: The Nth level is:

The penultimate level is:

The first level is:

When the beam splitter is a three-way beam splitter, that is, when K=3, the number of the first-stage beam splitter is one, the number of the second-stage beam splitter is 3, and the number of the third beam splitter is 9, The number of T-level beam splitters is 3 ^T-1 , and the phases that need to be adjusted for the three-channel detection medium output by each beam splitter are: N-level:

The penultimate level is:

The first level is:

For any K, the phases that need to be adjusted for the detection medium output by each beam splitter are: The Nth level is:

The penultimate level is:

The first level is:

It should also be noted that in other embodiments, the number of detection media separated by each beam splitter 22 may also be different. For example, some beam splitters 22 can separate three detection media, and some beam splitters 22 Two beams of detection media can be separated, some beam splitters 22 can separate four beams of detection media, etc. When the number of detection media separated by the beam splitter 22 is not the same, the beam splitter 22 required to obtain the J-channel detection medium The number of beam splitters 22 is also different, and those skilled in the art can calculate the required number of beam splitters 22 according to the required J-channel detection medium.

For the above-mentioned P phase modulators 23, an input terminal of the phase modulator 23 is connected to an output terminal of the beam splitter 22, and at least one output terminal of the phase modulator 23 is connected to a beam splitter 22. The input ends are connected, and the output ends of the remaining phase modulators 23 are connected to the input ends of the transmitting unit 24 respectively. In other words, at least one phase modulator 23 is located between the two beam splitters 22, and the remaining phase modulators 23 are located between the remaining beam splitters 22 and the transmitting unit 24, and P phase modulators The device 23 is used to phase-modulate the detection medium output by the beam splitter 22, so that the J-channel detection medium meets the preset interference condition.

Since at least one phase modulator 23 is placed between the two beam splitters 22, the pair of at least one phase modulator 23 is transmitted from one beam splitter 22 to another beam splitter 22 in the two beam splitters 22 The detection medium of the detector 22 is adjusted in phase to realize that after the other beam splitter 22 that receives the detection medium is split, all the detected media after the split have the phase adjusted by the phase modulator 23. The phase of the separated detection medium is adjusted uniformly, so that the phase of this part of the detection medium is adjusted uniformly before it is incident on the transmitting unit 24, and the phase of this part of the detection medium is subsequently adjusted to meet the preset phase difference. , The phase can be further adjusted based on the phase adjusted by the at least one phase modulator 23. Compared with the prior art, a phase modulator 23 is arranged before each emission unit 24. A phase modulator 23 only modulates the phase of a detection medium incident on the emission unit 24, and the phase modulation is based on the same beam of detection medium. In the way of performing phase modulation, the phase modulator of the present application needs to adjust the sum of phases less.

In some embodiments, the preset interference condition refers to the condition that the detection medium emitted by the J transmitting units 24 interfere in space to form a far-field detection medium, for example: the phase of the detection medium emitted by the J transmitting units 24 The difference is from 0 to

The N is the number of levels of the beam splitter 22. For example, when M beam splitters 22 are divided into three levels, N is 3. And with

The phase difference of the detection medium emitted by each emitting unit changes regularly, so that the direction of the far-field detection medium changes accordingly, and the scanning of the far-field detection medium is realized. of course,

with

-2k*π can be equivalent, and k is an integer.

It should be noted that the number of the front phase modulator 23 is not limited, and the specific position of the front phase modulator 23 is not limited. Those skilled in the art can set it according to the actual situation. However, the currently set phase modulator When the number and position of the phase modulators 23 are different, the number of phase modulators 23 required is also different, and the amplitude of the phases that need to be adjusted by each phase modulator 23 is also different, but as long as the adjusted J-channel detection medium meets The interference conditions can be preset.

In order to facilitate readers to better understand the inventive concept of the present invention, two examples of pre-phase modulators are described below.

(1). Refer to Figure 2 again. Among the K output terminals of each beam splitter 22, at least K-1 output terminals are connected to the input terminal of the K-1 phase modulator 23, namely: K-channel beam splitter 22 is connected Carrying K-1 phase modulators 23, the K-channel detection medium separated by the K-channel beam splitter 22, only one is directly input to the transmitting unit 24 or other beam splitters 22, and the K-1 detection medium needs to pass through After the phase is modulated, it is input to other beam splitters 22 or transmitter units 24.

Hereinafter, taking K=2 and the beam splitter 22 with one input and two output as an example, the adjustment situation will be described. Specifically, the phases to be adjusted by each phase modulator 23 located in front of the beam splitter 22:

V is the level of the beam splitter 22 corresponding to the phase modulator 23, and the phase of the phase modulator 23 at the front end of the transmitting unit 24 that needs to be adjusted is

The total phase to be adjusted

As shown in Fig. 3, when the beam splitter 22 is divided into two stages, the phase difference of the detection medium in each transmitting unit 24 must reach:

The required phase modulation is

Total

That is, it only needs phase adjustment

A total of phase modulation can be achieved directly on each transmitting unit 24

Or, as shown in FIG. 4, when the beam splitter 22 is divided into three levels, the phase difference on each transmitting unit 24 should be respectively as follows:

You need to adjust the phase to

Total

In other words, you only need to adjust the phase

The same effect.

(2) As shown in Figure 5, one phase modulator 23 is placed before the last-stage beam splitter 22, and the positions of other phase modulators 23 are shown in Figure 5. The required phase modulator 23 is: =J-1, the phase that the front phase modulator 23 needs to adjust is

The phases to be adjusted by other phase modulators 23 are:

The total phase modulation sum is:

Compared with the prior art phase modulation method, the ratio of the two phase modulation is: (2 ^N-1 N)/(2 ^N-1 (2 ^N -1))=N/(2 ^N -1).

In some embodiments, as shown in FIG. 6, the phased array emission array 20 further includes a base 25 and a thermal pad 26. The J transmitting units 24 are arranged in an array, such as a circular array, a square array, etc., and the distance between any two adjacent transmitting units is the same to ensure that the detection medium output from the antennas of the J transmitting units 24 reaches Interfere with each other to form a far-field detection medium.

J transmitting units 24 are all fixed on the base 25, and each thermal pad 26 is arranged between a transmitting unit 24 and the base 25. The heat generated by the transmitting unit 24 during operation is transmitted to the base 25 through the thermal pad 26. The base 25 is used to dissipate heat to avoid long-term accumulation of heat in the antenna, thereby causing the temperature of the transmitting unit 24 to be too high and affecting the performance of the transmitting unit 24.

Further, in order to better dissipate heat of the transmitting unit 24, the phased array transmitting array 20 further includes a fan 27. The base 25 is provided with a heat dissipation channel 251, the fan 27 is arranged at one end of the heat dissipation channel 251, and the other end of the heat dissipation channel 251 communicates with the outside. The fan 27 drives the air in the heat dissipation channel 251 to interact with the outside air, thereby The heat transferred from the emitting unit 24 to the heat dissipation channel of the base 25 is radiated to the external environment, which improves the heat dissipation effect.

In the embodiment of the present application, by pre-positioning at least one phase modulator 24 between two beam splitters 22, the phase of the detection medium transmitted from one beam splitter 22 to the other beam splitter 22 can be adjusted. The detection medium realized into the other beam splitter 22 has the phase adjusted by the phase modulator 23, so that the detection medium separated by the other beam splitter 22 has the phase adjusted by the phase modulator 23 The phase of the detection medium separated by the beam splitter 22 can be adjusted uniformly. When the detection medium separated by the beam splitter 22 is subsequently phase adjusted again, it can be adjusted based on the phase modulator Adjusting on the basis of the phase of the subsequent phase modulator greatly reduces the amplitude of the phase to be adjusted, which is beneficial to reducing the power of the subsequent phase modulator 23.

This application also provides an embodiment of a phased array receiving array. The phased array receiving array 30 includes a processor 31, Y beam combiners 32, Z phase modulators 33 and X receiving units 34. The X receiving units 34 are used to receive the returned detection media, and the Y beam combiners 32 combine the X channels of detection media and output to the processor 31. The Z phase modulators 33 are used to perform phase adjustment processing on the detection medium.

For the above Y beam combiners 32, the Y beam combiners 32 are arranged step by step, and are connected to the processor 31, and are used to combine detection media received by the X receiving units 34, and The number of each stage of the combiner 32 is H ^G-1 , where G is the level of the combiner 32, and the G is a natural number greater than 1, and the G is the number of input ends of the combiner 32 .

For the above-mentioned Z phase modulators, Z phase modulators 33, an output terminal of the phase modulator 33 is connected to an input terminal of the combiner 32, and at least one input terminal of the phase modulator 33 is connected to The output end of one beam combiner 32 is connected, the input ends of the remaining phase modulators 33 are respectively connected to the output end of the receiving unit 34, and the Z phase modulators 34 are used to detect X receiving units. The medium undergoes phase modulation.

In some embodiments, the Q-1 input terminals of the Q input terminals of each combiner 32 are respectively connected to the output terminals of the Q-1 phase modulators 33, and the Q is a natural number greater than 1. The step-by-step setting of the Y beam combiners 32 is specifically as follows: except for the beam combiner 32 connected to the processor 31, the input ends of some of the beam combiners 32 of the other beam combiners 32 are combined with another beam combiner 32 The output end of the beam combiner 32 is connected, and part of the input end of the beam combiner 32 is connected to the output end of another beam combiner 32 through the phase modulator 33.

In some embodiments, the detection medium may be a laser, and the beam combiner 32, the receiving unit 34, and the processor 31 are all used to process light; the detection medium may also be a sound wave, then the beam combiner 32, the receiving unit 34 and the processor 31 are both used to process sound waves; the detection medium can be electromagnetic waves, and the combiner 32, the receiving unit 34 and the processor 31 are all used to process electromagnetic waves.

It is worth noting that: the phased array receiving array 30 and the above-mentioned phased array transmitting array 20, one is used to realize the receiving function and the other is used to realize the transmitting function, and the two are arranged in reverse. For other functions of the phased array receiving array 30, please refer to The phased array emission array 20 is set up, which will not be repeated here.

In the embodiment of the present application, the detection media received by the X receiving units 34 are combined by Y beam combiners 32 to form a beam of detection media, which is input to the processor 31, where At least one phase modulator 33 is placed between the two beam combiners 32 to achieve phase adjustment of the detection medium.

This application also provides a radar embodiment. As shown in FIG. 7, the radar 100 includes a phased array transmitting array 20 and a phased array receiving array 30. The phased array emission array 20 of this embodiment has the same structure and function as the phased array emission array 20 of the foregoing embodiment. For the specific structure and function of the phased array emission array 20, please refer to the foregoing embodiment. Go into details one by one. The structure and function of the phased array receiving array 30 of this embodiment are the same as the phased array receiving array 30 of the above-mentioned embodiment. For the specific structure and function of the phased-array receiving array 30, please refer to the above-mentioned embodiment. Go into details one by one.

This application also provides an embodiment of a smart sensing device, and the smart sensing device includes a radar. The structure and function of the radar in this embodiment are the same as the structure and function of the radar in the foregoing embodiment. For the specific structure and function of the radar, please refer to the foregoing embodiment, which will not be repeated here.

For smart sensing devices, devices that can detect the location and distance of surrounding objects and make decisions based on the location and distance of surrounding objects, such as smart robots, smart cars, smart airplanes, and so on.

It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should be the ordinary meanings understood by those skilled in the art to which the embodiments of the present application belong.

In the description of the new embodiment of this implementation, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear" ", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", " The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply the pointed device or The element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present application.

In addition, the technical terms “first”, “second”, etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. In the description of the embodiments of the present application, "multiple" means two or more, unless otherwise clearly defined.

In the description of the new embodiment of the present implementation, unless otherwise clearly specified and limited, the technical terms "installation", "connected", "connected", "fixed" and other terms should be understood in a broad sense. For example, it may be a fixed connection. It can also be detachably connected or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, which can be the internal communication of two components or the mutual connection of two components Role relationship. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the embodiments of the present application can be understood according to specific circumstances.

In the description of the new embodiment of the present embodiment, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be in direct contact with the first and second features, or the first and second features Features are indirectly contacted through intermediaries. Moreover, the "above", "above" and "above" of the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the level of the first feature is higher than the second feature. The “below”, “below” and “below” of the second feature of the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the level of the first feature is smaller than the second feature.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the application, not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: It is still possible to modify the technical solutions described in the foregoing embodiments, or equivalently replace some or all of the technical features; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the application The scope shall be covered by the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any manner. This application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

A phased array emission array (20), characterized in that it comprises:

Output source (21);

J transmitting units (24);

M beam splitters (22), the M beam splitters (22) are set step by step, and are connected to the output source (21) for step-by-step detection of the detection medium output by the output source (21) Beam splitting to obtain J paths of detection media, and each path of detection media is incident on one of the emission units (24);

P phase modulators (23), an input end of the phase modulator (23) is connected to an output end of the beam splitter (22), and at least one output end of the phase modulator (23) is connected to The input end of one beam splitter (22) is connected, the output ends of the remaining phase modulators (23) are respectively connected to the input end of the transmitting unit (24), and the P phase modulators (23) are used for The detection medium output by the beam splitter (22) is phase-modulated so that the J-channel detection medium meets the preset interference condition, wherein the J and M are both natural numbers greater than 2, and the P is greater than 1. Natural number.
The phased array emission array (20) according to claim 1, characterized in that,

Among the K output terminals of each beam splitter (22), K-1 output terminals are respectively connected to the input terminals of K-1 phase modulators (23), and the K is a natural number greater than 1.
The phased array emission array (20) according to claim 1, characterized in that,

The step-by-step setting of the M beam splitters (22) is specifically as follows: except for the beam splitter (22) that receives the detection medium of the output source (21), the rest of the beam splitters (22) The input end of the beam splitter (22) is connected to the output end of another beam splitter (22), and part of the input end of the beam splitter (22) passes through the phase modulator and the other beam splitter (22). ) Is connected to the output terminal.
The phased array emission array (20) according to claim 3, characterized in that,

The number of beam splitters (22) at each level is K T-1 , the T is the level of the beam splitter (22), and the T is a natural number greater than 1, and the K is the beam splitter ( 22) The number of output terminals.
The phased array emission array (20) according to any one of claims 1-4, characterized in that,

The preset interference condition is that the phase difference of the J path detection medium is 0 to
The N is the number of levels of the beam splitter (22).
The phased array emission array (20) according to any one of claims 1-4, characterized in that,

The J emitting units (24) are arranged in an array, and the distance between any two adjacent emitting units (24) is the same.
The phased array emission array (20) according to claim 6, characterized in that it further comprises a base (25) and J thermally conductive pads (26);

The J emitting units (24) are all fixed on the base (25), and each of the thermally conductive pads (26) is arranged between a emitting unit (24) and the base (25).
The phased array emission array (20) according to claim 7, characterized in that it further comprises a fan (27);

The base (25) is provided with a heat dissipation channel (251), the fan (27) is arranged at one end of the heat dissipation channel (251), and the other end of the heat dissipation channel (251) communicates with the outside.
A phased array receiving array, characterized in that:

receiver;

X receiving units;

Y beam combiners, the Y beam combiners are arranged step by step, and are connected with the receiver, and are used to combine the detection medium received by the X receiving units;

Z phase modulators, one output terminal of the phase modulator is connected to the input terminal of the combiner, at least one input terminal of the phase modulator is connected to the output terminal of one combiner, and the rest The input ends of the phase modulators are respectively connected with the output ends of the receiving unit, and the Z phase modulators are used to adjust the phase of the detection medium received by the X receiving units.
The phased array receiving array according to claim 9, wherein:

Among the Q input terminals of each of the beam combiners, Q-1 input terminals are respectively connected to the output terminals of Q-1 phase modulators, and the Q is a natural number greater than 1.
The phased array receiving array according to claim 9, wherein the stepwise setting of the Y beam combiners is specifically: in addition to the beam combiner connected to the receiver, the rest of the beam combiners The input end of the part of the beam combiner is connected with the output end of another beam combiner, and the input end of the part of the beam combiner is connected with the output end of another beam combiner through the phase modulator.
The phased array receiving array according to claim 9, wherein:

The number of each stage of the combiner is H G-1 , the G is the level of the combiner, and the G is a natural number greater than 1, and the G is the number of input ends of the combiner.
A radar (100), characterized by comprising the phased array transmitting array (20) and the phased array receiving array (30) according to any one of claims 1-8, the phased array receiving array (30) It is used to receive the reflection detection medium reflected by the measured object.
An intelligent sensing device, characterized by comprising the radar (100) according to claim 13.