CN115411500B - Antenna assembly, radar device and vehicle - Google Patents

Antenna assembly, radar device and vehicle Download PDF

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Publication number
CN115411500B
CN115411500B CN202211341935.7A CN202211341935A CN115411500B CN 115411500 B CN115411500 B CN 115411500B CN 202211341935 A CN202211341935 A CN 202211341935A CN 115411500 B CN115411500 B CN 115411500B
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China
Prior art keywords
antenna
coupling
groove
radiation
feed line
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CN202211341935.7A
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CN115411500A (en
Inventor
张磊
王绍龙
王冲
张燎
冯友怀
陈祥
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Nanjing Hawkeye Electronic Technology Co Ltd
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Nanjing Hawkeye Electronic Technology Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
    • H01Q1/3233—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • Details Of Aerials (AREA)

Abstract

The invention discloses an antenna assembly, a radar device and a vehicle, wherein the antenna assembly comprises a medium substrate, an antenna arranged on the medium substrate and a coupling assembly arranged on the medium substrate; the antenna is electrically isolated from the coupling assembly, wherein the antenna comprises a plurality of radiation parts, at least one radiation part in the plurality of radiation parts is provided with a groove, the coupling assembly comprises a protruding piece and a coupling piece connected with the protruding piece, the protruding piece extends into the groove, and the coupling piece and the radiation parts are arranged oppositely. The radiation part is provided with the groove, the protruding piece extends into the groove, so that the radiation part and the coupling assembly form a capacitor, the coupling assembly is coupled through the coupling piece to generate coupling current, and the coupling current is opposite to the current on the surface of the radiation part, so that the aperture of the antenna azimuth plane is reduced, and the beam width of the antenna azimuth plane is increased.

Description

Antenna assembly, radar device and vehicle
Technical Field
The invention relates to the technical field of radio frequency, in particular to an antenna assembly, a radar device and a vehicle.
Background
Radar detection is used for a long time on vehicles as a perception technique.
More millimeter-wave radars are currently used to detect objects from short distances (0.2 m for short range SRR) to long distances (30-80 m for mid-range MRR and 80-200 m for long range LRR).
In the short-range detection, the millimeter wave radar is often required to have a large detection range.
The limit detection range of the radar is determined by the radar antenna to a large extent, and the larger the beam width of the radar antenna is, the larger the radar power coverage range is.
At present, an array element of a vehicle-mounted millimeter wave radar antenna mainly comprises 4 types: the antenna comprises a string antenna, a comb antenna, an SIW slot antenna and a waveguide cavity antenna, wherein the string antenna and the comb antenna are widely used due to the characteristics of high gain, low profile, easiness in processing, low cost and the like.
In order to improve the beam width of the radar antenna, various technical schemes are adopted at home and abroad: 1. a mode of combining a mechanical rotating shaft and an antenna is adopted; 2. adopting a plurality of columns of antennas with different directional beams, and then utilizing an equal power division network for connection, wherein different columns are responsible for receiving at different angles; 3. realizing beam forming by adopting multi-column antennas with the same direction and a feed network; 4. controlling different antenna switches by using a circuit; 5. a coupling unit with a corresponding size is arranged beside the antenna; 6. a metamaterial radiating element; 7. auxiliary devices such as a reflector lens and the like are added; 8. and (4) shaping the antenna housing.
Increasing the beam width of the antenna in one or more of the first to eighth prior art solutions, such as those mentioned above, requires additional design space, which is not favorable for miniaturization of the radar, and adds additional components, which increases the manufacturing cost.
Disclosure of Invention
The invention provides an antenna assembly, a radar device and a vehicle, which are used for solving the problem that extra design space is needed for increasing the beam width of an antenna azimuth plane at present.
According to an aspect of the invention, there is provided an antenna assembly, the antenna comprising: the antenna comprises a dielectric substrate, an antenna arranged on the dielectric substrate and a coupling component arranged on the dielectric substrate; the antenna and the coupling assembly are insulated from each other, wherein the antenna comprises a plurality of radiation parts, at least one radiation part in the plurality of radiation parts is provided with a groove, the coupling assembly comprises a protruding piece and a coupling piece connected with the protruding piece, the protruding piece extends into the groove, and the coupling piece and the radiation parts are arranged oppositely.
Further, the antenna further includes: the radiating parts are connected with the feeder lines and are arranged on two sides of the feeder lines in a staggered mode.
Further, the radiation part is recessed to one side close to the feeder line along the extending direction perpendicular to the feeder line to form the groove.
Further, the protruding piece is vertically connected with the coupling piece.
Further, the protruding piece, the coupling piece, the radiation part and the groove are all quadrilateral, and the protruding piece is arranged in parallel with the first side and the second side of the groove.
Further, the protruding piece, the radiation part and the groove are all triangular, and the coupling piece is quadrilateral.
Further, the radiation part and the groove are both in a fan shape, and the coupling piece is in a circular arc shape.
Further, the maximum length of the radiating part and the corresponding coupling component in the extending direction perpendicular to the feeder line is W; the maximum widths of the radiating parts and the corresponding coupling components in the extending direction parallel to the feeder line are both W.
Further, the maximum length of the protruding member in the extending direction perpendicular to the feeder line is 0.7L to 0.9L.
Further, the minimum distance between the protruding part and the feeder line is 0.1L-0.4L, and the minimum distance between the protruding part and the groove bottom of the groove is larger than 0 and smaller than 0.2 mm.
Further, the angle of the radiating part close to the top angle of the feeder line is theta, and the top angles of the protruding part and the groove close to the feeder line are both 0.2 theta to 0.5 theta.
According to another aspect of the present invention there is provided a radar apparatus including an antenna assembly according to any one of the embodiments of the present invention.
According to another aspect of the present invention, there is provided a vehicle including the radar apparatus according to any one of the embodiments of the present invention.
The antenna has the advantages that the radiation part is provided with the groove, the protruding piece extends into the groove, the radiation part and the coupling assembly form a capacitor, the coupling is carried out through the coupling piece to generate coupling current on the coupling assembly, and the coupling current is opposite to the current on the surface of the radiation part, so that the aperture of the antenna azimuth plane is reduced, and the beam width of the antenna azimuth plane is increased.
On the other hand, the protruding part is triangular, so that impedance matching of the antenna is facilitated.
The coupling piece is the coupling area increase of circular arc and radiation portion, is favorable to promoting coupling strength.
Drawings
The technical scheme and other beneficial effects of the invention are obvious from the detailed description of the specific embodiments of the invention in combination with the attached drawings.
Fig. 1 is a schematic structural diagram of an antenna assembly according to an embodiment of the present invention.
Fig. 2 is a side view of a radar apparatus according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a radiation portion and a coupling assembly according to a first embodiment of the present invention.
Fig. 4A is a current flow diagram of a wide cell according to a first embodiment of the present invention.
Fig. 4B is a current flow diagram of a narrow cell according to a first embodiment of the present invention.
Fig. 5 is a comparison diagram of three antenna assemblies provided by an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of an antenna assembly according to a second embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a radiation portion and a coupling component according to a second embodiment of the present invention.
Fig. 8 is a schematic structural diagram of an antenna assembly according to a third embodiment of the present invention.
Fig. 9 is a schematic structural diagram of a radiation portion and a coupling assembly according to a third embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
It should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments.
All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
Referring now to fig. 1-2, fig. 1 is a schematic structural diagram of an antenna assembly according to an embodiment of the present invention, where the antenna assembly includes: a dielectric substrate 200, an antenna 100 and a coupling component 20.
Illustratively, the antenna and the coupling assembly 20 are insulated from each other, wherein the antenna comprises a plurality of radiation parts 10, at least one radiation part 10 of the plurality of radiation parts 10 is provided with a groove 11, the coupling assembly 20 comprises a protrusion 21 and a coupling piece 22 connected with the protrusion 21, the protrusion 21 extends into the groove 11, and the coupling piece 22 is arranged opposite to the radiation part 10.
In some embodiments, the antenna further includes a feed line 30, the radiation portions 10 are connected to the feed line 30, and the radiation portions 10 are staggered on two sides of the feed line 30.
Illustratively, the radiation portion 10 is recessed to a side close to the feed line 30 along a direction perpendicular to an extending direction of the feed line 30 to form the groove 11.
In this embodiment, the protruding member 21 is vertically connected to the coupling member 22.
The protruding member 21, the coupling member 22, the radiation portion 10 and the groove 11 are all quadrilateral, and the protruding member 21 is arranged in parallel with the first side and the second side of the groove 11.
Referring to fig. 3, for example, the maximum length of the radiating portion 10 and the corresponding coupling element 20 in the direction perpendicular to the extension direction of the feed line 30 is W.
The maximum width of the projecting member 21 in the extending direction parallel to the feeder line 30 is Wt, and Wt ranges from 0.15W to 0.4W.
Illustratively, the maximum length of the protruding member 21 in the direction perpendicular to the extension direction of the feed line 30 is Lt, and the range of Lt is 0.6L to 0.8L.
The minimum distance between the protruding part 21 and the feeder line 30 is d, the range of d is 0.25L to 0.45L, the minimum distance between the protruding part 21 and the groove bottom of the groove 11 is g, and the range of g is more than 0 and less than 0.2 mm.
Illustratively, L is a half electric wavelength, W is 0.2L to 1.2L, and the maximum width of the radiation portions 10 and the corresponding coupling elements 20 in the direction parallel to the extension direction of the feed line 30 is according to a taylor distribution, i.e., the W value of the radiation portions 10 located in the feed line 30 is larger, and the W value of the radiation portions 10 located at both ends of the feed line 30 is smaller.
Specifically, when the W value of the radiation portion 10 is greater than 0.7L, the radiation portion 10 is a wide cell, and when the W value of the radiation portion 10 is 0.7 or less, the radiation portion 10 is a narrow cell.
Specifically, referring to fig. 4A, fig. 4A shows the current distribution of the wide unit, when the W value of the radiation portion 10 is large, the surface of the radiation portion 10 generates a reverse current to affect the performance of the antenna.
Fig. 4B shows the current distribution of the narrow element, and when W of the radiating portion 10 is smaller, the surface current of the radiating portion 10 is uniform, which is beneficial to enhance the antenna performance.
A gap exists between the coupling element 22 and the radiation part 10 to form a capacitance effect, the radiation part 10 is coupled with the coupling assembly 20, and the direction of the current generated by the excitation protrusion 21 on the protrusion 21 is opposite to the direction of the surface current of the radiation part 10, so that the azimuth plane equivalent aperture of the antenna is reduced, and the beam width of the azimuth plane is increased.
Illustratively, the coupling element 20 is also insulated from ground, i.e., the coupling element 20 is not grounded.
Referring to fig. 2, the coupling element 20 is not in communication with the ground plane 300 of the radar apparatus.
Fig. 5 is a diagram showing a comparison of antenna structures of an antenna element according to a first embodiment of the present invention, such as (a) in fig. 5, (b) in fig. 5, and two rows of comb antenna elements according to the prior art, such as (c) in fig. 5.
The traditional improvement scheme adopts two rows of comb-shaped antenna assemblies, and achieves the effect of expanding the beam width by utilizing the connection of a power divider and a phase shift line.
The center frequencies of all three antenna components are 77GHz.
After the improvement, the azimuth plane-3 dB beam width is improved from 64 degrees to 120 degrees, and the promotion amplitude is obvious.
Compared with the two-column comb antenna component scheme, although the peak gain is slightly lower, the beam width gain effect is better, and the occupied area of the antenna component is far smaller than that of the two-column antenna component.
In the first embodiment, the radiation part 10 is provided with the groove 11, the protrusion 21 extends into the groove 11, so that the radiation part 10 and the coupling element 20 form a capacitor, coupling is performed through the coupling element 22 to generate a coupling current on the coupling element 20, and the coupling current is opposite to the current on the surface of the radiation part 10, thereby reducing the aperture of the antenna azimuth plane and increasing the beam width of the antenna azimuth plane.
Fig. 6 is a schematic structural diagram of an antenna assembly according to a second embodiment of the present invention, referring to fig. 2, where the antenna assembly includes: a dielectric substrate 200, an antenna 100 and a coupling component 20.
Illustratively, the antenna is electrically isolated from the coupling assembly 20, wherein the antenna comprises a plurality of radiation parts 10, at least one radiation part 10 of the plurality of radiation parts 10 is provided with a groove 11, the coupling assembly 20 comprises a protruding part 21 and a coupling part 22 connected with the protruding part 21, the protruding part 21 extends into the groove 11, and the coupling part 22 is arranged opposite to the radiation part 10.
In some embodiments, the antenna further comprises: and the radiating parts 10 are connected with the feeder lines 30, and the radiating parts 10 are arranged on two sides of the feeder lines 30 in a staggered manner.
Illustratively, the radiation portion 10 is recessed to a side close to the feed line 30 along a direction perpendicular to an extending direction of the feed line 30 to form the groove 11.
In this embodiment, the protruding member 21 is vertically connected to the coupling member 22.
The radiation part 10 and the groove 11 are triangular, and the coupling piece 22 is quadrilateral.
Referring to fig. 7, for example, the maximum length of the radiating portion 10 and the corresponding coupling element 20 in the direction perpendicular to the extension direction of the feed line 30 is W.
The maximum width of the projecting member 21 in the extending direction parallel to the feeder line 30 is Wt, and Wt ranges from 0.15W to 0.4W.
Illustratively, the maximum length of the protrusion 21 in the direction perpendicular to the extension direction of the feed line 30 is Lt, and the range of Lt is 0.6L to 0.8L.
The minimum distance between the protrusion 21 and the feeder 30 is d, and d ranges from 0.25L to 0.45L.
Illustratively, the vertex angle of the radiating portion 10 close to the feed line 30 is θ 1, and the vertex angle of the protrusion 21 and the vertex angle of the groove 11 close to the feed line 30 are both θ 2, where θ 2 ranges from 0.2 θ 1 to 0.5 θ 1.
Illustratively, L is a half-electric wavelength, W is 0.2L to 1.2L, and the maximum width of the radiating portion 10 and the corresponding coupling element 20 in the direction parallel to the extension direction of the feed line 30 is according to a taylor distribution, i.e., the W value of the radiating portion 10 located in the feed line 30 is larger, and the W value of the radiating portion 10 located at both ends of the feed line 30 is smaller.
Specifically, when the W value of the radiation portion 10 is greater than 0.7L, the radiation portion 10 is a wide cell, and when the W value of the radiation portion 10 is 0.7 or less, the radiation portion 10 is a narrow cell.
Specifically, referring to fig. 4A, fig. 4A shows the current distribution of the wide unit, when the W value of the radiation portion 10 is large, the surface of the radiation portion 10 generates a reverse current to affect the performance of the antenna.
Fig. 4B shows the current distribution of the narrow element, and when W of the radiating portion 10 is smaller, the surface current of the radiating portion 10 is uniform, which is beneficial to enhance the antenna performance.
A gap exists between the coupling element 22 and the radiation part 10 to form a capacitance effect, the radiation part 10 is coupled with the coupling component 20, the direction of the current generated by exciting the convex part 21 on the convex part 21 is opposite to the direction of the surface current of the radiation part 10, and therefore the azimuth plane equivalent aperture of the antenna is reduced, and the beam width of the azimuth plane is increased.
It should be noted that, although fig. 4A and 4B are the antenna component structure of the first embodiment, the current flow direction in the second embodiment is the same as that in the first embodiment, so the current flow direction in the first embodiment is referred to in the second embodiment.
Illustratively, the coupling element 20 is also insulated from ground, i.e., the coupling element 20 is not grounded.
In the second embodiment, the groove 11 is formed in the radiation portion 10, and the protrusion 21 extends into the groove 11, so that the radiation portion 10 and the coupling element 20 form a capacitor, coupling is performed through the coupling element 22 to generate a coupling current on the coupling element 20, and the coupling current is opposite to a current on the surface of the radiation portion 10, thereby reducing the aperture of the antenna azimuth plane and increasing the beam width of the antenna azimuth plane.
On the other hand, the protruding member 21 is triangular, which is beneficial to the impedance matching of the antenna.
Fig. 8 is a schematic structural diagram of an antenna assembly according to a third embodiment of the present invention, with reference to fig. 2, where the antenna assembly includes: a dielectric substrate 200, an antenna 100 and a coupling component 20.
The antenna is electrically isolated from the coupling assembly 20, wherein the antenna includes a plurality of radiation portions 10, at least one radiation portion 10 of the plurality of radiation portions 10 is provided with a groove 11, the coupling assembly 20 includes a protrusion 21 and a coupling member 22 connected to the protrusion 21, the protrusion 21 extends into the groove 11, and the coupling member 22 is disposed opposite to the radiation portion 10.
In some embodiments, the antenna further comprises: and the radiating parts 10 are connected with the feeder lines 30, and the radiating parts 10 are arranged on two sides of the feeder lines 30 in a staggered manner.
Illustratively, the radiation portion 10 is recessed to a side close to the feed line 30 along a direction perpendicular to an extending direction of the feed line 30 to form the groove 11.
In this embodiment, the radiation part 10 and the groove 11 are both fan-shaped, and the coupling piece 22 is arc-shaped.
Referring to fig. 9, exemplarily, the maximum lengths of the radiation portions 10 and the corresponding coupling elements 20 in the extending direction perpendicular to the feeding lines 30 are W, and the maximum widths of the radiation portions 10 and the corresponding coupling elements 20 in the extending direction parallel to the feeding lines 30 are W.
The maximum width of the projecting member 21 in the extending direction parallel to the feeder line 30 is 0.15W to 0.4W.
Illustratively, the maximum length of the protruding member 21 in the direction perpendicular to the extension direction of the feeder line 30 is 0.6L to 0.8L.
The minimum distance between the protrusion 21 and the feed line 30 is 0.25L to 0.45L.
Illustratively, the vertex angle of the radiating portion 10 close to the feed line 30 is θ 1, and the vertex angle of the protrusion 21 and the vertex angle of the groove 11 close to the feed line 30 are both θ 2, where θ 2 ranges from 0.2 θ 1 to 0.5 θ 1.
Illustratively, L is a half electric wavelength, W is 0.2L to 1.2L, and the maximum width of the radiation portions 10 and the corresponding coupling elements 20 in the direction parallel to the extension direction of the feed line 30 is according to a taylor distribution, i.e., the W value of the radiation portions 10 located in the feed line 30 is larger, and the W value of the radiation portions 10 located at both ends of the feed line 30 is smaller.
Specifically, when the W value of the radiation portion 10 is greater than 0.7L, the radiation portion 10 is a wide cell, and when the W value of the radiation portion 10 is 0.7 or less, the radiation portion 10 is a narrow cell.
Specifically, referring to fig. 4A, fig. 4A shows the current distribution of the wide unit, when the W value of the radiation portion 10 is large, the surface of the radiation portion 10 generates a reverse current to affect the performance of the antenna.
Fig. 4B shows the current distribution of the narrow element, and when the W of the radiation portion 10 is small, the surface current of the radiation portion 10 is uniform, which is beneficial to enhance the antenna performance.
A gap exists between the coupling element 22 and the radiation part 10 to form a capacitance effect, the radiation part 10 is coupled with the coupling component 20, the direction of the current generated by exciting the convex part 21 on the convex part 21 is opposite to the direction of the surface current of the radiation part 10, and therefore the azimuth plane equivalent aperture of the antenna is reduced, and the beam width of the azimuth plane is increased.
It should be noted that, although fig. 4A and 4B illustrate the antenna component structure of the first embodiment, the current flow direction in the third embodiment is the same as that in the first embodiment, so the third embodiment refers to the current flow direction in the first embodiment.
Illustratively, the coupling element 20 is also insulated from ground, i.e., the coupling element 20 is not grounded.
In the third embodiment, the groove 11 is formed in the radiation portion 10, and the protrusion 21 extends into the groove 11, so that the radiation portion 10 and the coupling element 20 form a capacitor, coupling is performed through the coupling element 22 to generate a coupling current on the coupling element 20, and the coupling current is opposite to a current on the surface of the radiation portion 10, thereby reducing the aperture of the antenna azimuth plane and increasing the beam width of the antenna azimuth plane.
On the other hand, the coupling area of the coupling piece 22 with the radiation part 10 is increased in the form of a circular arc, which is beneficial to improving the coupling strength.
The invention also provides a radar device comprising the antenna assembly according to any of the embodiments of the invention.
The invention also provides a vehicle comprising a radar apparatus according to any embodiment of the invention.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.

Claims (11)

1. An antenna, comprising: the antenna comprises a feeder line, a dielectric substrate, an antenna arranged on the dielectric substrate and a coupling component arranged on the dielectric substrate;
the antenna and the coupling assembly are insulated from each other, wherein the antenna comprises a plurality of radiating parts, at least one radiating part in the plurality of radiating parts is provided with a groove, the coupling assembly comprises a protruding piece and a coupling piece connected with the protruding piece, the protruding piece extends into the groove, the coupling piece is arranged opposite to the radiating parts, and the radiating parts are connected with the feeder lines;
the convex part the radiation portion with the recess all is triangle-shaped, the coupling piece is the quadrangle, or the convex part the coupling piece the radiation portion with the recess all is the quadrangle, or the radiation portion with the recess all is fan-shaped, the coupling piece is arc.
2. The antenna of claim 1, wherein the radiating portions are staggered on both sides of the feed line.
3. The antenna of claim 2, wherein the radiating portion is recessed to a side close to the feed line in a direction perpendicular to an extending direction of the feed line to form the groove.
4. The antenna of claim 2, wherein the protrusion is perpendicularly connected to the coupling.
5. The antenna of claim 4, wherein the protrusion is disposed parallel to the first and second sides of the groove when the protrusion, the coupling, the radiating portion, and the groove are each quadrilateral.
6. The antenna of claim 1, wherein the maximum length of the radiating portion and the corresponding coupling element in a direction perpendicular to the extension direction of the feed line is W;
the maximum widths of the radiation parts and the corresponding coupling components in the extending direction parallel to the feeder line are both W.
7. The antenna of claim 6, wherein a maximum length of the protrusion in a direction perpendicular to an extension direction of the feed line is 0.6L to 0.8L.
8. The antenna of claim 6 wherein the minimum spacing between the protrusion and the feed line is 0.25L to 0.45L, and the minimum spacing between the protrusion and the slot bottom of the slot is greater than 0 and less than 0.2 mm.
9. The antenna of claim 1, wherein when the protrusion, the radiation portion and the groove are all triangular, the coupling member is quadrilateral, or the radiation portion and the groove are all fan-shaped, and the coupling member is arc-shaped, the angle of the radiation portion near the top angle of the feed line is θ, and the top angles of the protrusion and the groove near the feed line are both 0.2 θ to 0.5 θ.
10. A radar apparatus comprising an antenna according to any one of claims 1 to 8.
11. A vehicle characterized by comprising the radar apparatus of claim 10.
CN202211341935.7A 2022-10-31 2022-10-31 Antenna assembly, radar device and vehicle Active CN115411500B (en)

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CN114336003B (en) * 2020-09-30 2024-01-30 华为技术有限公司 Antenna, preparation method thereof, millimeter wave sensor and terminal
CN114843749A (en) * 2021-02-01 2022-08-02 华为技术有限公司 Antenna, detection device, radar and terminal
CN215732221U (en) * 2021-08-19 2022-02-01 惠州市德赛西威智能交通技术研究院有限公司 Broadband comb-shaped series-fed array antenna
CN115149249A (en) * 2022-09-01 2022-10-04 广东大湾区空天信息研究院 High-gain microstrip antenna array, millimeter wave vehicle-mounted radar sensor and vehicle

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