阅读说明：本技术 多入多出雷达天线 (Multiple-input multiple-output radar antenna ) 是由 何月 王俊涛 郑荐方 李旭阳 于 2020-12-31 设计创作，主要内容包括：本发明提供一种多入多出雷达天线,所述多入多出雷达天线包括：PCB板,设置于所述PCB板上的发射天线组和接收天线组；其中,所述发射天线组与所述接收天线组平行,且所述接收天线组设置于所述发射天线组内。本发明所述多入多出雷达天线将接收天线采用插入发射天线的方式,达到不需要进行收发天线分别放置在一边,就可以减少天线系统于PCB板上所占用的面积,有利于得到更好的测角分辨率。(The invention provides a MIMO radar antenna, comprising: the PCB board is arranged on the transmitting antenna group and the receiving antenna group on the PCB board; wherein the transmitting antenna group is parallel to the receiving antenna group, and the receiving antenna group is arranged in the transmitting antenna group. According to the MIMO radar antenna, the receiving antenna is inserted into the transmitting antenna, so that the receiving and transmitting antennas are not required to be respectively placed at one side, the occupied area of an antenna system on a PCB can be reduced, and better angle measurement resolution is facilitated.)

1. A multiple-input multiple-output radar antenna, comprising:

the PCB board is arranged on the transmitting antenna group and the receiving antenna group on the PCB board;

wherein the transmitting antenna group is parallel to the receiving antenna group, and the receiving antenna group is arranged in the transmitting antenna group.

2. The mimo radar antenna of claim 1, wherein:

the transmitting antenna group comprises at least two transmitting antennas which are arranged in parallel;

the receiving antenna group comprises at least two receiving antennas which are arranged in parallel;

the transmit antenna is parallel to the receive antenna.

3. The mimo radar antenna of claim 2, wherein: the receiving antenna group is integrally inserted between any two adjacent transmitting antennas.

4. The mimo radar antenna of claim 2, wherein: the receiving antennas divided into a plurality of groups are respectively inserted between every two adjacent transmitting antennas; wherein each subgroup includes one or more receive antennas.

5. The mimo radar antenna of claim 1, wherein: the transmitting antenna group and the receiving antenna group are arranged in a staggered mode in the parallel direction.

6. The mimo radar antenna of claim 2 or 5, wherein: and the transmitting antennas in the transmitting antenna group are arranged in a staggered manner in the parallel direction.

7. The mimo radar antenna of claim 2 or 5, wherein: and the receiving antennas in the receiving antenna group are arranged in a staggered manner in the parallel direction.

8. The mimo radar antenna of claim 1, wherein: the mimo radar antenna further includes an auxiliary antenna group inserted into the receiving antenna group.

9. The mimo radar antenna of claim 8, wherein: the auxiliary antenna group comprises at least one auxiliary antenna, the auxiliary antenna being parallel to the receive antenna; the auxiliary antenna group is integrally inserted between two adjacent receiving antennas or the auxiliary antenna group is divided into a plurality of groups which are respectively inserted between any two adjacent receiving antennas.

10. The mimo radar antenna of claim 2, wherein:

each transmitting antenna in the transmitting antenna group is integrated on a chip of the PCB through a substrate integrated waveguide structure;

each receiving antenna in the receiving antenna group is integrated on a chip of the PCB through a substrate integrated waveguide structure.

Technical Field

The invention belongs to the technical field of antennas, relates to an antenna, and particularly relates to a multi-input multi-output radar antenna.

Background

The MIMO radar antenna system layout is a common mode for improving the performance of a radar sensor, and the antenna system layout of the existing radar sensor used in the sky mostly adopts a form of not adopting a sparse array and fails to well utilize the layout of the whole sensor.

The existing radar antenna adopts the design scheme as shown in fig. 1A, and a virtual sparse distribution type antenna array system is formed by a multiple-input multiple-output system of antennas 1, 2, 3, 4, 5, 6 and 7. The transmit group formed by antennas 1, 3 and the receive group formed by antennas 4, 5, 6, 7 form a higher performance detection mode. The transmitting antenna 2 and the receiving antenna 4, 5, 6, 7 form a short-distance mode detection target, because only one channel is provided, relative detection performance parameters are general. The antenna array in the antenna array 1 adopts an array mode, the wave beam synthesis of the antenna in the horizontal direction and the vertical direction adopts a Taylor or Chebyshev mode to form lower side lobes, and the description mode is also suitable for the antennas 2, 3, 4, 5, 6 and 7.

Although the transmitting antenna groups 1, 2, 3 and the receiving antenna groups 4, 5, 6, 7 are relatively far away, the increase of the isolation makes the PCB layout of the whole antenna waste relatively serious, and at the same time, the layout cannot effectively improve the isolation between the receiving and transmitting of the antenna system. Meanwhile, due to the limitation of area, an antenna system with relatively high angular resolution cannot be obtained in a reasonable sparse distribution mode. The antenna has no angle measurement capability in the vertical direction, so that the range of non-ambiguity of a vertical directional diagram is small.

Therefore, how to provide a mimo radar antenna to solve the problem of low angular resolution caused by unreasonable antenna layout in the prior art has become a technical problem to be solved by those skilled in the art.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a mimo radar antenna, which is used to solve the problem of low angular resolution caused by unreasonable antenna layout in the prior art.

To achieve the above and other related objects, the present invention provides a mimo radar antenna, comprising: the PCB board is arranged on the transmitting antenna group and the receiving antenna group on the PCB board; wherein the transmitting antenna group is parallel to the receiving antenna group, and the receiving antenna group is arranged in the transmitting antenna group.

In an embodiment of the present invention, the transmitting antenna group includes at least two transmitting antennas disposed in parallel; the receiving antenna group comprises at least two receiving antennas which are arranged in parallel; the transmit antenna is parallel to the receive antenna.

In an embodiment of the present invention, the receiving antenna group is integrally inserted between any two adjacent transmitting antennas.

In an embodiment of the present invention, the receiving antennas divided into a plurality of groups are respectively inserted between every two adjacent transmitting antennas; wherein each subgroup includes one or more receive antennas.

In an embodiment of the present invention, the transmitting antenna group and the receiving antenna group are disposed in a staggered manner in a parallel direction.

In an embodiment of the present invention, the transmitting antennas in the transmitting antenna group are arranged in a staggered manner in the parallel direction.

In an embodiment of the present invention, the receiving antennas in the receiving antenna group are arranged in a staggered manner in the parallel direction.

In an embodiment of the present invention, the mimo radar antenna further includes an auxiliary antenna group inserted into the receiving antenna group.

In an embodiment of the present invention, the auxiliary antenna group includes at least one auxiliary antenna, and the auxiliary antenna is parallel to the receiving antenna; the auxiliary antenna group is integrally inserted between two adjacent receiving antennas or the auxiliary antenna group is divided into a plurality of groups which are respectively inserted between any two adjacent receiving antennas.

In an embodiment of the present invention, each transmitting antenna in the transmitting antenna group is integrated on a chip of a PCB board through a substrate integrated waveguide structure; each receiving antenna in the receiving antenna group is integrated on a chip of the PCB through a substrate integrated waveguide structure.

As described above, the mimo radar antenna of the present invention has the following advantageous effects:

firstly, the receiving antenna is inserted into the transmitting antenna, so that the receiving antenna and the transmitting antenna are not required to be respectively arranged at one side, the occupied area of an antenna system on a PCB (printed circuit board) can be reduced, the aperture of the antenna is increased, and better angle measurement resolution is facilitated;

secondly, the antenna system has phase difference in the vertical receiving and transmitting direction through the staggered arrangement in the group of the transmitting antenna group, the receiving antenna group, the transmitting antenna group and the receiving antenna group and in the group of the receiving antenna group in the parallel direction, so that the angle measurement in the vertical direction can be realized, and a wider range without ambiguity can be obtained by adjusting the staggered distance;

thirdly, the isolation of a receiving and transmitting system can be improved to a greater extent by the staggered design of the receiving and transmitting groups at positions in the parallel direction;

fourthly, the present invention can increase the horizontal angle measurement range of the antenna system by adding an auxiliary antenna (a balanced antenna or a dummy antenna) in the horizontal direction between the receiving antennas.

Drawings

Fig. 1A shows a schematic diagram of a prior art radar antenna.

Fig. 1B is a schematic structural diagram of a mimo radar antenna according to an embodiment of the present invention.

Fig. 2A is a schematic diagram illustrating an embodiment of an arrangement of the transmitting antenna group and the receiving antenna group on a PCB according to the present invention.

Fig. 2B is a schematic diagram illustrating another arrangement of the transmitting antenna group and the receiving antenna group on the PCB according to the present invention.

Fig. 3A is a diagram showing an example of a misalignment arrangement of the transmitting antenna group and the receiving antenna group in parallel directions according to the present invention.

Fig. 3B is a diagram showing another example of the arrangement of the transmitting antenna group and the receiving antenna group in parallel.

Fig. 4A is a diagram illustrating an example of a misalignment between the transmitting antennas of the present invention in the parallel direction.

Fig. 4B is a diagram illustrating an example of a misalignment between the receiving antennas of the present invention in the parallel direction.

Fig. 5 is a schematic structural diagram of a mimo radar antenna according to another embodiment of the present invention.

Description of the element reference numerals

1, 2, 3 transmitting antenna

4, 5, 6, 7 receiving antenna

1' multiple input multiple output radar antenna

10 PCB board

11 transmitting antenna group

12 receiving antenna group

111, transmitting antenna

111A，

111B，111C

121, receiving antenna

121A，

121B ，

121C，121D

13 auxiliary antenna group

131 auxiliary antenna

14-substrate integrated waveguide structure

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

The present embodiment provides a mimo radar antenna, including:

the PCB board is arranged on the transmitting antenna group and the receiving antenna group on the PCB board;

wherein the transmitting antenna group is parallel to the receiving antenna group, and the receiving antenna group is arranged in the transmitting antenna group.

The transmitting antenna group comprises at least two transmitting antennas which are arranged in parallel;

the receiving antenna group comprises at least two receiving antennas which are arranged in parallel;

the transmit antenna is parallel to the receive antenna.

The mimo radar antenna provided in the present embodiment will be described in detail with reference to the drawings. Fig. 1B shows a schematic structural diagram of a mimo radar antenna in an embodiment. As shown in fig. 1B, the mimo radar antenna 1 includes a PCB board 10, a transmitting antenna group 11 and a receiving antenna group 12. Wherein, the transmitting antenna group 11 and the receiving antenna group 12 are disposed on the PCB board 10 in parallel, and the receiving antenna group 12 is disposed in the transmitting antenna group 11.

As shown in fig. 1B, the transmitting antenna group 11 includes at least two transmitting antennas 111 arranged in parallel. The transmitting antenna group 11 includes transmitting antennas 111A, 111B, and 111C. The receiving antenna group 12 includes at least two receiving antennas 121 arranged in parallel. The receiving antenna group 12 includes receiving antennas 121A, 121B, 121C, and 121D. Each transmitting antenna 111 in the transmitting antenna group 11 is integrated on the chip of the PCB board through the substrate integrated waveguide structure 14, and each receiving antenna 121 in the receiving antenna group 12 is integrated on the chip of the PCB board through the substrate integrated waveguide structure 14.

The electromagnetic wave signals are transmitted from the transmitting antennas 111A, 111B and 111C to the free space in a time-sharing manner, and the amplitude and phase of the electromagnetic wave are reflected by the object. The amplitude and phase information of the reflected electromagnetic wave is obtained by the receiving antenna arrays of the receiving antennas 121A, 121B, 121C and 121D.

In the present embodiment, the aperture of the virtual antenna is increased by disposing the receive antenna group 12 in the transmit antenna group 11. Along with the increase of the aperture, the horizontal and vertical angular resolution of the whole radar antenna can be improved. Meanwhile, by adopting the design scheme that the receiving antenna group 12 is arranged in the transmitting antenna group 11, the area of a PCB occupied by the antenna can be reduced.

The receiving antenna group 12 is inserted entirely between any adjacent two transmitting antennas 111. Please refer to fig. 2A, which is a schematic diagram illustrating an implementation manner of a configuration mode in which the transmitting antenna group and the receiving antenna group are disposed on the PCB. As shown in fig. 2A, the receiving antennas 121A, 121B, 121C and 121D in the receiving antenna group 12 are integrally inserted between two adjacent transmitting antennas 111B and 111C.

The receiving antennas divided into a plurality of groups are respectively inserted between every two adjacent transmitting antennas; wherein each subgroup includes one or more receive antennas. Fig. 2B is a schematic diagram of another arrangement of the transmitting antenna group and the receiving antenna group on the PCB. As shown in fig. 2B, the receiving antennas 121A, 121B, 121C, and 121D are divided into two groups, that is, the receiving antenna 121A is one group, the receiving antennas 121B, 121C, and 121D are one group, the receiving antenna 121A is interposed between the two adjacent transmitting antennas 111A and 111B, and the receiving antennas 121B, 121C, and 121D are interposed between the two adjacent transmitting antennas 111B and 111C.

In this embodiment, in order to improve the isolation between the antenna transceiving sets and reduce the antenna coupling angle, the transmitting antenna set 11 and the receiving antenna set 12 are arranged in a staggered manner in the parallel direction. Specifically, the transmitting antenna group 11 and the receiving antenna group 12 are all arranged in a staggered manner or partially arranged in a staggered manner in the parallel direction.

For example, as shown in fig. 3A, the top of the transmitting antenna 111 in the transmitting antenna group 11 is lower than the top of the receiving antenna 121 in the receiving antenna group 12; alternatively, as shown in fig. 3B, the top of the transmitting antenna 111 in the transmitting antenna group 11 is higher than the top of the receiving antenna 121 in the receiving antenna group 12. The distance between the top of the transmitting antenna 121 and the top of the receiving antenna 121 is set according to actual requirements.

Further, in order to improve the angle measurement capability in the vertical/elevation direction, the transmitting antennas 111A, 111B and 111C in the transmitting antenna group 11 are arranged in a staggered manner in the parallel direction, for example, as shown in fig. 4A, the top of the transmitting antenna 111A in the transmitting antenna group 11 is lower than the top of the transmitting antennas 111B and 111C. The distance between the tops of the transmitting antennas arranged in a staggered mode is set according to actual requirements.

The receiving antennas 121A, 121B, 121C and 121D in the receiving antenna group 12 are arranged in a staggered manner in the parallel direction, for example, as shown in fig. 4B, the tops of the receiving antennas 121A, 121B and 121C are lower than the top of the receiving antenna 121D. The distance between the tops of the receiving antennas arranged in a staggered mode is set according to actual requirements.

In order to increase the flatness of the phase linearity region and amplitude of the receiving antenna group 12 and at the same time increase the horizontal angle measurement range, the multiple input multiple output radar antenna further includes an auxiliary antenna group 13 as shown in fig. 5. The auxiliary antenna group 13 is inserted in the receiving antenna group 12.

In this embodiment, the auxiliary antenna group 13 includes at least one auxiliary antenna 131, and the auxiliary antenna 131 is parallel to the receiving antenna 121. The auxiliary antenna group is integrally inserted between two adjacent receiving antennas or the auxiliary antenna group is divided into a plurality of groups which are respectively inserted between any two adjacent receiving antennas.

In this embodiment, the plurality of auxiliary antennas 131 are added, the number of antenna combining units is increased by changing phases, multi-antenna combining is formed by changing phases, and after combining, antenna beam broadening can be achieved, and meanwhile, the angle measurement range is increased.

In summary, the mimo radar antenna of the present invention has the following advantages:

firstly, the receiving antenna is inserted into the transmitting antenna, so that the receiving antenna and the transmitting antenna are not required to be respectively arranged at one side, the occupied area of an antenna system on a PCB (printed circuit board) can be reduced, the aperture of the antenna is increased, and better angle measurement resolution is facilitated;

secondly, the antenna system has phase difference in the vertical receiving and transmitting direction through the staggered arrangement of the transmitting antenna group, the receiving antenna group, the transmitting antenna group and the receiving antenna group in the parallel direction, so that the angle measurement in the vertical direction can be realized, and a wider range without ambiguity can be obtained by adjusting the staggered distance;

thirdly, the invention can improve the isolation between the receiving antenna group and the transmitting antenna group to a greater extent by the staggered design of the receiving and transmitting groups at the positions in the parallel direction;

fourthly, the present invention can increase the horizontal angle measurement range of the antenna system by adding an auxiliary antenna (a balanced antenna or a dummy antenna) in the horizontal direction between the receiving antennas. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.