WO2020258214A1 - Réseau d'antennes à ondes progressives à alimentation arrière, radar et plate-forme mobile - Google Patents

Réseau d'antennes à ondes progressives à alimentation arrière, radar et plate-forme mobile Download PDF

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Publication number
WO2020258214A1
WO2020258214A1 PCT/CN2019/093557 CN2019093557W WO2020258214A1 WO 2020258214 A1 WO2020258214 A1 WO 2020258214A1 CN 2019093557 W CN2019093557 W CN 2019093557W WO 2020258214 A1 WO2020258214 A1 WO 2020258214A1
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WIPO (PCT)
Prior art keywords
dielectric substrate
antenna array
traveling wave
wave antenna
slot
Prior art date
Application number
PCT/CN2019/093557
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English (en)
Chinese (zh)
Inventor
唐哲
汤一君
蔡铭
Original Assignee
深圳市大疆创新科技有限公司
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Application filed by 深圳市大疆创新科技有限公司 filed Critical 深圳市大疆创新科技有限公司
Priority to PCT/CN2019/093557 priority Critical patent/WO2020258214A1/fr
Priority to CN201980007788.XA priority patent/CN111684657B/zh
Publication of WO2020258214A1 publication Critical patent/WO2020258214A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • H01Q21/0031—Parallel-plate fed arrays; Lens-fed arrays
    • 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
    • G01S7/28—Details of pulse systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/20—Resilient mountings
    • 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
    • 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
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas

Definitions

  • This application relates to the field of antenna technology, and in particular to a back-fed traveling wave antenna array, radar, and movable platform.
  • the vehicle-mounted millimeter wave radar transmits millimeter waves to the outside through the antenna, receives the reflected signal from the target, and obtains the physical environment information around the car body quickly and accurately after data processing (such as the relative distance, relative speed, angle, movement between the car and other objects) Direction etc.).
  • Wideband millimeter-wave radar can greatly improve the range resolution compared to narrowband low-band radars, and is suitable for application scenarios with high range resolution.
  • the antenna needs to have broadband working capabilities.
  • embodiments of the present application provide a back-fed traveling wave antenna array, a radar, and a movable platform, and provide a traveling wave antenna that can have a wider bandwidth.
  • an embodiment of the present application provides a back-fed traveling wave antenna array, including: a first dielectric substrate, a feeding unit is provided on the surface of the first dielectric substrate; a first ground layer is provided on the first dielectric substrate; The surface of a dielectric substrate facing away from the power feeding unit, the first ground layer is provided with a first gap; an intermediate dielectric substrate is provided on the surface of the first ground layer facing away from the first dielectric substrate; The second grounding layer is provided on the surface of the intermediate dielectric substrate facing away from the first grounding layer, the second grounding layer is provided with a second gap; the second dielectric substrate is provided on the second grounding layer A radiation unit is arranged on the side of the second dielectric substrate facing away from the second ground layer; a plurality of first metal vias, the plurality of first metal vias Pass through the first dielectric substrate, the first ground layer, the intermediate dielectric substrate, the second ground layer and the second dielectric substrate, and the plurality of first metal vias are enclosed in the Around the first slot and the
  • an embodiment of the present application provides a radar including a power supply and the back-fed traveling wave antenna array in the various embodiments of the first aspect, and the power supply is used to supply power to the back-fed traveling wave antenna array.
  • an embodiment of the present application provides a movable platform, including a fuselage and the radar provided in the second aspect, and the radar is arranged on the movable platform.
  • the back-fed traveling wave antenna array provided by the first aspect of the present application adopts the form of a traveling wave antenna, supplemented by slot coupling and a feeding structure fed from the middle of the radiating unit, combined with a plurality of second wave antennas that can be equivalent to a waveguide structure.
  • a metal via can make the antenna array have a wider working bandwidth, and meet the requirements of good gain flatness and stable beam pointing in the broadband.
  • Fig. 1 is a schematic diagram of an exploded structure of a back-fed traveling wave antenna array according to an embodiment
  • FIG. 2 is a schematic diagram of the planar structure of the radiation unit and the second dielectric substrate in FIG. 1;
  • FIG. 3 is a schematic plan view of the second ground layer of FIG. 1;
  • FIG. 4 is a schematic plan view of the intermediate dielectric substrate of FIG. 1;
  • FIG. 6 is a schematic diagram of the three-dimensional structure of the power feeding unit of FIG. 1;
  • FIG. 7 is a schematic plan view of the first dielectric substrate of FIG. 1;
  • FIG. 8 is a schematic plan view of the first ground layer of FIG. 1;
  • FIG. 9 is a schematic diagram of the structure of the patch of an embodiment
  • FIG. 10 is a schematic diagram of a partial structure of a second ground layer according to an embodiment
  • FIG. 11 is a schematic diagram of a cross-sectional structure of a back-fed traveling wave antenna array according to an embodiment
  • FIG. 12 is a simulation curve diagram of return loss of a back-fed traveling wave antenna array according to an embodiment
  • Fig. 13 is a view of the elevation plane of a back-fed traveling wave antenna array according to an embodiment
  • Fig. 14 is an azimuth plane pattern of a back-fed traveling wave antenna array according to an embodiment.
  • a component when a component is said to be “fixed to” another component, it can be directly on the other component or a central component may also exist. When a component is considered to be “connected” to another component, it can be directly connected to another component or there may be a centered component at the same time.
  • the 77-81GHz wideband radar can greatly improve the range resolution compared with the 76 ⁇ 77GHz narrowband frequency band. It is suitable for short-range detection and high range resolution (0.15m ⁇ 0.3m) application scenarios.
  • the antenna is an important component of the radar front end Part of it needs to have the ability to work in broadband, including impedance matching in a wide frequency range, sidelobe suppression, beam pointing and gain flatness.
  • Impedance matching Antennas can be divided into traveling wave antennas and standing wave antennas.
  • the existing antennas are mainly standing wave antennas, whose impedance characteristics change drastically with frequency, and there is a problem of narrow impedance bandwidth (relative bandwidth about 3%);
  • Beam pointing refers to the pointing position of the point of maximum gain in the antenna pattern.
  • the beam pointing of the antenna array is determined by the phase of each radiating element.
  • the existing one-end side feed mode can only guarantee the beam in the narrow band Pointing is stable at the normal point;
  • Gain flatness In the prior art, the gain flatness of the broadband internal antenna is about 4 to 5 dB. This value is too large, making the radar detection range insufficient.
  • an embodiment of the present application provides a back-fed traveling wave antenna array.
  • a back-fed traveling wave antenna array the structure of which is laminated and includes in order from top to bottom: a radiating unit 10, a second dielectric substrate 20, a second ground layer 21, and a middle
  • the dielectric substrate 30, the first ground layer 41, the first dielectric substrate 40 and the power feeding unit 50 pass through the first dielectric substrate 40, the first ground layer 41, the intermediate dielectric substrate 30, the second ground layer 21 and the second dielectric substrate 20 ⁇ is provided with a plurality of first metal vias 60.
  • the power feeding unit 50 is disposed on the surface of the first dielectric substrate 40.
  • the power feeding unit 50 may be adhered to the surface of the first dielectric substrate 40, or may be disposed on the surface of the first dielectric substrate 40 by etching.
  • the first ground layer 41 is provided with a first gap 411.
  • the second ground layer 21 is provided with a second gap 211.
  • a plurality of first metal vias 60 are enclosed around the first gap 411 and the second gap 211.
  • the first slot 411 and the second slot 211 are used to couple the energy of the feeding unit 50 to the middle of the radiation unit 10.
  • the back-fed traveling wave antenna array in this embodiment adopts the form of a traveling wave antenna, supplemented by slot coupling and a feeding structure fed from the middle of the radiating unit 10, combined with a plurality of first wave antenna structures that can be equivalent to a waveguide structure.
  • the metal via 60 can make the antenna array have a wider working bandwidth, and meet the requirements of good gain flatness and stable beam pointing in the broadband.
  • the energy of the feeding unit 50 is propagated to the first slot 411 through slot coupling, and a plurality of first metal vias 60 are enclosed around the first slot 411 and the second slot 211 to form an equivalent waveguide structure, so that The energy coupled by a slot 411 propagates to the second slot 211 through the equivalent waveguide structure, and the second slot 211 propagates the energy to the middle of the radiating unit 10 by coupling, and then the energy is transmitted to the space in the form of electromagnetic waves through the radiating unit 10 radiation.
  • a plurality of first metal vias 60 are provided to form an equivalent waveguide structure.
  • the attenuation is reduced, which can ensure the efficiency of the antenna.
  • the energy propagates on the radiating unit 10 it is radiated step by step from the middle of the radiating unit 10 to both ends, so as to achieve the effect of stable beam pointing.
  • the first slit 411 or the second slit 211 is any one of a rectangle, an H shape, a dumbbell shape, a bow tie shape, and an hourglass shape.
  • the first slit 411 or the second slit 211 is H-shaped.
  • the H-shaped slit of the second slit 211 has a central slit width W1 of 0.055 ⁇ g -0.075 ⁇ g , an end slit width W2 of 0.14 ⁇ g -0.24 ⁇ g , and a central slit length L1 of 0.24 ⁇ g -0.44 ⁇ g .
  • the slit length L2 is 0.055 ⁇ g -0.098 ⁇ g .
  • ⁇ g is the equivalent medium wavelength at the center frequency point. Setting the reasonable size makes the coupling efficiency of the energy of the feeding unit 50 in the H-shaped slot of the second slot 211 high, or the coupling efficiency of the energy of the H-shaped slot of the first slot 411 to the radiation unit 10 is high.
  • the positions of the first slit 411 correspond to the positions of the second slit 211.
  • the orthographic projections of the first slit 411 and the second slit 211 overlap.
  • the extending direction of the plurality of first metal vias 60 is perpendicular to the surface of the first dielectric substrate 40, and the equivalent waveguide structure formed by the plurality of first metal vias 60 is perpendicular to the surface of the first dielectric substrate 40.
  • the cross-sectional shape in the direction is rectangular.
  • the cross-sectional shape of the equivalent waveguide structure formed by the space enclosed by the plurality of first metal vias 60 may also be the same as that of the first gap 411.
  • the second gap 211 may be different.
  • the cross-sectional shape may be any one of rectangle, circle, parallelogram, trapezoid, etc.
  • the distance between each first metal via 60 and the first slit 411 or the second slit 211 may be set differently or completely different.
  • the plurality of first metal vias 60 are formed by opening corresponding vias on the dielectric substrate and the ground layer of each layer, and filling the vias with a metal material. Specifically, referring to FIG. 3, a plurality of through holes 212 are opened on the second ground layer 21. Please refer to FIG. 4, a plurality of through holes 301 are opened on the intermediate dielectric substrate 30. Referring to FIG. 7, a plurality of through holes 401 are opened on the first dielectric substrate 40. Please refer to FIG. 8, a plurality of through holes 412 are opened on the first ground layer 41. Please refer to FIG. 1 and FIG. 2, a plurality of through holes are also opened on the first dielectric substrate 40.
  • the positions of the multiple through holes of the above-mentioned layers correspond to each other, and the shapes are the same.
  • a layer of metal is plated on the inner walls of the multiple through holes of each layer, or the through holes of each layer are filled with metal, thereby forming the first metal via 60.
  • the metal material of the first metal via 60 may be copper, aluminum, silver, or the like.
  • the first ground layer 41 and the second ground layer 21 are made of metal materials, such as copper foil, aluminum foil, silver foil, and the like.
  • the first dielectric substrate 40, the intermediate dielectric substrate 30, and the second dielectric substrate 20 are laminates.
  • the materials of the first dielectric substrate 40 and the second dielectric substrate 20 are high-frequency and low-loss materials (such as Rogers Ro 4835, Rogers Ro 3003, etc.)
  • the material of the intermediate dielectric substrate 30 is FR4.
  • the material selection of the above-mentioned layers is divided according to the purpose.
  • the first dielectric substrate 40 is used as the base of the feeding unit 50. On the one hand, it is used to give the feeding unit 50 enough support, and on the other hand, it is used to isolate the feeding unit 50 from The first ground layer 41 enables the first slot 411 to be coupled with the feeding unit 50. Therefore, the first dielectric substrate selects a high-frequency and low-loss material to reduce energy loss and improve coupling efficiency.
  • the second dielectric substrate 20 is similar to the first dielectric substrate 40, and high-frequency and low-loss materials are also selected.
  • the intermediate dielectric substrate can be used for radar wiring. Due to the introduction of the intermediate dielectric substrate, the longitudinal distance between the first slot and the second slot is increased.
  • the part enclosed by the plurality of first metal vias 60 constitutes an equivalent waveguide structure.
  • the energy coupled by the first slot 411 can be more concentratedly transmitted to the second slot 211.
  • a common FR4 material can be selected for the intermediate dielectric substrate.
  • the number of intermediate dielectric substrates 30 is multiple. Specifically, the number of intermediate dielectric substrates 30 can be set to 5 layers, that is, intermediate dielectric substrates 31, 32, 33, 34, and 35. The number of the intermediate dielectric substrates 30 is related to the amplitude and phase characteristics of the energy. When the energy coupled to the first slot 411 by the feeding unit 50 propagates to the second slot 211, the amplitude and phase characteristics should be kept unchanged as much as possible. In other embodiments, the number of intermediate dielectric substrates 30 is not limited to 5 layers, and the number of intermediate dielectric substrates 30 can be 1 layer, 2 layers, 3 layers, 4 layers, 5 layers, 6 layers...N layers, where N is Positive integer. In addition, the thickness of each intermediate dielectric substrate is not limited.
  • the radiation unit 10 includes a plurality of patches 11 and a plurality of microstrip lines 12 connecting the plurality of patches 11.
  • the first slot 411 and the second slot 211 are used to couple the energy of the feeding unit 50 to the first microstrip line 121 in the middle of the radiation unit 10, and the first microstrip line 121 is one of the multiple microstrip lines 12 .
  • the radiation unit 10 is a structure in the form of microstrip patch series feed.
  • the energy transmitted by the second slot 211 is coupled to the first microstrip line 121, and the energy flows to both ends of the radiation unit 10, and radiation is generated on the patch 11. , Flowing on the microstrip line 12.
  • the second gap 211 intersects the first microstrip line 121 at an angle of 90°.
  • the microstrip line 12 including the first microstrip line The extension direction of 121
  • the length direction of the second slit 211 are perpendicular to each other.
  • the angle between the length direction of the second gap 211 and the microstrip line 12 (including the first microstrip line 121) is allowed to float slightly, for example, the clip
  • the angle is between 85° and 95°
  • the length direction of the second slit 211 is perpendicular to the first microstrip line 121. Setting this angle allows the second slot 211 to couple with the first microstrip line 121 to transmit energy.
  • the radiating unit 10 adopts the form of a microstrip patch structure, and radiates step by step from the first microstrip line 121 in the middle to the two ends, ensuring that the beam pointing is stable at the normal point in the broadband range, and the stability is good.
  • the radiation unit 10 has a symmetrical structure with respect to the first microstrip line 121.
  • the symmetrical radiation unit 10 allows energy to be radiated on the patches 11 on both sides of the first microstrip line 121 in the same form, and the obtained antenna pattern has a symmetrical structure, and the beam is stably directed to the normal point in the broadband range.
  • a plurality of patches 11 are provided with first grooves 111.
  • the first groove 111 is preferably opened in the middle of one end of the patch 111. Opening the first groove 111 can adjust the impedance, thereby adjusting the energy distribution on each patch 11, which can effectively suppress side lobes while meeting the electromagnetic wave radiation requirement of the preset frequency band.
  • One end of the microstrip line 12 connecting two adjacent patches 11 is connected to the bottom wall of the first groove 111, and the other end is connected to the end of the adjacent patch 11 facing away from the first groove 111 .
  • the first groove 111' opened by the patch 11' at the end of the radiation unit 10 faces the middle of the radiation unit 10, and the first grooves 111 opened by the other patches 11 face away from the radiation unit 10. Central.
  • the first groove 111' of the patch 11' at the end is used to adjust impedance matching to realize the radiation characteristics of the traveling wave antenna.
  • the patch 11 is rectangular, in the extension direction of the microstrip line 12, the length LP of the patch 11 is 0.5 ⁇ g , and the depth of the first groove 111 is 0.06 ⁇ g .
  • the width WP of the patch 11 is 2.3 ⁇ g -3.4 ⁇ g
  • the width WS from the side wall of the first groove 111 to the side wall of the microstrip line 12 opposite to it Is 0.24 ⁇ g
  • ⁇ g is the equivalent medium wavelength at the center frequency.
  • a reasonable size of the patch 11 is set so that when energy is radiated on the patch 11, the generated resonance frequency and bandwidth are within a preset range, and the energy is reasonably distributed on the patch 11, which can achieve the characteristics of low side lobe.
  • multiple patches 11 have the same structure, or multiple patches 11 have a gradual structure.
  • the radiation unit 11 is easy to process.
  • the multiple patches 11 have a gradual structure, it can satisfy that the energy distribution on each patch 11 is better and the side lobes are lower. Since the energy from the first microstrip line 121 in the middle of the radiating unit 10 is radiated to the two ends, the energy is gradually attenuated. The more it is transmitted to the two ends, the weaker the energy is. Therefore, setting a gradual structure can make each sticker The energy distribution of the film is more reasonable. Specifically, the structure of the multiple patches 11 arranged from the middle to the two ends of the radiation unit 10 gradually increases.
  • the microstrip line 12 is provided with an impedance matching structure (not shown in the figure), and the impedance matching structure has a polygonal shape.
  • the impedance matching structure is used to adjust impedance matching so that the energy radiated by the radiating unit 10 meets the preset bandwidth.
  • the impedance matching structure is sheet-shaped, and the overall extension plane is parallel to the plane of the patch 11.
  • the shape of the impedance matching structure may be a triangle, a quadrilateral, a pentagon, a hexagon, or the like.
  • the radiation unit 10 includes a second metal sheet 14, and the second metal sheet 14 is connected to the first metal via 60.
  • a second metal sheet 14 is provided for fixing a plurality of first metal vias 60.
  • the second metal sheet 14 is provided with a slit 141 and a through hole 142.
  • the slit 141 corresponds to the position of the first slit 411 and is used to expose the coupling space of the first slit 411 to avoid shielding.
  • the inner wall of the through hole 142 is connected to the plurality of first metal via holes 60.
  • the power feeding unit 50 includes a microstrip line 52.
  • the microstrip line 52 and the first gap 411 The intersection and the included angle is 90°.
  • the extension direction of the microstrip line 52 and the length direction of the first slot 411 are perpendicular to each other.
  • the form in which the feeding unit 50 couples energy to the first slot 411 is the same as the form in which the second slot 211 couples energy to the first microstrip line 121 of the radiating unit 10, both of which are slot coupling modes.
  • the structure of the microstrip line 52 may be a long strip, and the width of the front end of the energy flow may be set to be wider for impedance matching.
  • the front end of the energy flow of the microstrip line 52 is used to connect to a feeder line for receiving energy from the radio frequency chip. The energy flows through the microstrip line 52 and couples energy to the second gap 211 at the end of the energy flow.
  • the feeding unit 50 further includes a first metal sheet 51, the first metal sheet 51 is provided with a second groove 511, the microstrip line 52 extends into the second groove 511, and There is an interval with the inner wall of the second groove 511.
  • the second groove 511 is arranged to surround the microstrip line 52 to prevent the energy of the microstrip line 52 from radiating to both sides and reduce energy loss, so that more energy is coupled to the second gap 211.
  • the structure for coupling energy to the second slot 211 is not limited to the microstrip line structure, but can also adopt the coplanar waveguide form (GCPW), the substrate integrated waveguide form (SIW), etc., and the structure refers to the prior art. Yes, I won’t repeat it.
  • GCPW coplanar waveguide form
  • SIW substrate integrated waveguide form
  • the first dielectric substrate 40 is provided with a plurality of second metal vias 53, and the plurality of second metal vias 53 are provided on the first metal sheet 51 facing away from the second recess.
  • the second metal via 53 is connected between the first metal sheet 51 and the first ground layer 41.
  • the first metal sheet 51 is provided with a through hole 513
  • the second metal via 53 is connected to the sidewall of the through hole 513
  • the second metal via 53 forms a barrier shielding structure to reduce the energy along the microstrip line 52
  • the self-extension direction is transmitted, so that energy is coupled to the first gap 411 as much as possible.
  • the first metal sheet 51 is further provided with a plurality of through holes 512, and the sidewalls of the plurality of through holes 512 are connected with the first metal via 60 to connect and fix the first metal via 60 together with the second metal sheet 14.
  • FIG. 11 Please refer to Figures 1 and 11.
  • the arrows in Figure 11 indicate the propagation direction of energy.
  • the energy is coupled from the feeding unit 50 to the first gap 411 of the first ground layer 41, which is enclosed by a plurality of first metal vias 60
  • the energy coupled by the first slot 411 propagates to the second slot 211 of the second ground layer 21, and the energy propagated by the second slot 211 is coupled to the middle of the radiating unit 10 and radiates from
  • the middle part of the unit 10 propagates to both ends, and when the energy propagates on the radiation unit 10, electromagnetic waves are radiated to the surrounding space, so as to realize the propagation process of the energy to the electromagnetic waves.
  • the structure design of each patch makes the energy distribution reasonable, which can realize the amplitude and phase characteristics of the traveling wave antenna, the impedance bandwidth is wide, and the working frequency band covers 77GHz-81GHz.
  • the beam pointing can be stabilized at the normal point.
  • the gain flatness is less than 1dB.
  • FIG. 13 Please refer to FIG. 13 to simulate the antenna array of the present application, and it is obtained that the sidelobe suppression of the elevation plane at the frequency points of 77GHz, 79GHz and 81GHz is less than 20dB, and the sidelobe suppression is good.
  • FIG. 14 Please refer to FIG. 14 to simulate the antenna array of the present application, and it is obtained that the sidelobe suppression on the horizontal plane at the frequency points of 77GHz, 79GHz and 81GHz is less than 20dB, and the sidelobe suppression is good.
  • an embodiment of the present application also provides a radar, which is a millimeter wave radar.
  • the radar includes a power supply and the back-fed traveling wave antenna array provided in the embodiment of the application, and the power supply is used to supply power to the back-fed traveling wave antenna array.
  • a structure such as a data line can also be provided for power supply or transmission of control signals.
  • the radar may also include a signal processor, which may include a radio frequency chip, which can be used to feed energy to the back-fed traveling wave antenna array.
  • the signal processor can also process the electrical signals received by the back-fed traveling wave antenna.
  • the embodiment of the present application also provides a movable platform, such as a car, a ship, a train, etc.
  • the movable platform includes a fuselage and the radar provided in the embodiment of the present application, and the radar is set on the movable platform.

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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)
  • Electromagnetism (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)

Abstract

La présente invention concerne un réseau d'antennes à ondes progressives à alimentation arrière, un radar et une plate-forme mobile. Le réseau d'antennes à ondes progressives à alimentation arrière comprend : un premier substrat diélectrique, une unité d'alimentation étant disposée sur la surface du premier substrat diélectrique ; une première couche de masse, la première couche de masse étant pourvue d'un premier espace ; un substrat diélectrique intermédiaire ; une seconde couche de masse, la seconde couche de masse étant pourvue d'un second espace ; un second substrat diélectrique, le côté du second substrat diélectrique opposé à la seconde couche de masse étant pourvu d'une unité de rayonnement ; une pluralité de premiers trous d'interconnexion métalliques, la pluralité de premiers trous d'interconnexion métalliques pénétrant dans le premier substrat diélectrique, la première couche de masse, le substrat diélectrique intermédiaire, la seconde couche de masse et le second substrat diélectrique, et la pluralité de premiers trous d'interconnexion métalliques entourant le premier espace et le second espace, le premier espace et le second espace étant utilisés pour coupler l'énergie de l'unité d'alimentation au milieu de l'unité de rayonnement. Le réseau d'antennes à ondes progressives à alimentation arrière selon la présente invention présente une large bande passante de travail, et satisfait aux exigences de qualité d'ondulation résiduelle de gain et de stabilité de pointage de lobe dans une large bande.
PCT/CN2019/093557 2019-06-28 2019-06-28 Réseau d'antennes à ondes progressives à alimentation arrière, radar et plate-forme mobile WO2020258214A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/CN2019/093557 WO2020258214A1 (fr) 2019-06-28 2019-06-28 Réseau d'antennes à ondes progressives à alimentation arrière, radar et plate-forme mobile
CN201980007788.XA CN111684657B (zh) 2019-06-28 2019-06-28 背馈式行波天线阵列、雷达和可移动平台

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Application Number Priority Date Filing Date Title
PCT/CN2019/093557 WO2020258214A1 (fr) 2019-06-28 2019-06-28 Réseau d'antennes à ondes progressives à alimentation arrière, radar et plate-forme mobile

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WO2020258214A1 true WO2020258214A1 (fr) 2020-12-30

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WO2023122978A1 (fr) * 2021-12-28 2023-07-06 华为技术有限公司 Structure d'adaptateur, antenne et borne
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