CN116299186A - Radar component and millimeter wave radar - Google Patents
Radar component and millimeter wave radar Download PDFInfo
- Publication number
- CN116299186A CN116299186A CN202211094185.8A CN202211094185A CN116299186A CN 116299186 A CN116299186 A CN 116299186A CN 202211094185 A CN202211094185 A CN 202211094185A CN 116299186 A CN116299186 A CN 116299186A
- Authority
- CN
- China
- Prior art keywords
- radar
- substrate
- frequency
- signal transmission
- transmission line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000758 substrate Substances 0.000 claims abstract description 232
- 230000008054 signal transmission Effects 0.000 claims abstract description 75
- 238000002955 isolation Methods 0.000 claims abstract description 45
- 230000008878 coupling Effects 0.000 claims abstract description 10
- 238000010168 coupling process Methods 0.000 claims abstract description 10
- 238000005859 coupling reaction Methods 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims description 75
- 238000004519 manufacturing process Methods 0.000 description 16
- 239000010408 film Substances 0.000 description 12
- 239000000463 material Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 239000004020 conductor Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000011031 large-scale manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 102100034112 Alkyldihydroxyacetonephosphate synthase, peroxisomal Human genes 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 101000799143 Homo sapiens Alkyldihydroxyacetonephosphate synthase, peroxisomal Proteins 0.000 description 1
- 238000000848 angular dependent Auger electron spectroscopy Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- 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
- H01Q1/12—Supports; Mounting means
-
- 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
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses a radar component and a millimeter wave radar, wherein the radar component comprises: a radar substrate, wherein a radar chip is arranged on the first surface; the antenna element is arranged on the first surface of the high-frequency substrate, the signal transmission line is also arranged on the high-frequency substrate, the conducting layer and the insulating film arranged on the conducting layer are arranged on the radar substrate and the second surface of the high-frequency substrate, and the second surface of the high-frequency substrate is adhered to the second surface of the radar substrate; the first end of the conductive piece extends out of the first surface of the radar substrate and is electrically connected with the radar chip, and the second end of the conductive piece is electrically connected with the antenna element through the signal transmission line; the radar substrate and the conductive layer on the second surface of the high-frequency substrate are arranged at intervals with the periphery of the conductive piece, and annular grooves are formed; at least one of the substrates is provided with an isolation groove on the second surface for realizing a coupling connection between the radar substrate conductive layer and the high frequency substrate conductive layer. The invention can solve the problem of lower flexibility of the existing radar component.
Description
Technical Field
The invention relates to the technical field of antenna transmission, in particular to a radar component and a millimeter wave radar.
Background
Millimeter radar is applied more and more in ADAS, intelligent home, medical treatment and other industries, and has rapid development. In the field of automobile autopilot, millimeter wave radar is one of the most important sensors and is a necessary device. The special millimeter radar can be realized on a very small PCB, and the radar board is usually manufactured with an antenna and other chips on the same PCB to form a single-board radar system. The benefit is high integration, but the disadvantages are also apparent, for example, if antennas of different performance indicators are required, the entire PCB must be redesigned, although parts other than the antennas do not need to be changed. In addition, in order to ensure performance, the antenna part is usually manufactured by a high-frequency material substrate, the rest part is only required to be manufactured by common FR4, and the single-board radar system is required to use PCB manufacturing technology of two substrates, so that the manufacturing difficulty is high.
Disclosure of Invention
The invention mainly aims to provide a radar component, which aims to solve the problem of low flexibility of the existing radar component.
To achieve the above object, the present invention provides a radar assembly comprising:
the radar device comprises a radar substrate, a first sensor and a second sensor, wherein the radar substrate is provided with a first surface and a second surface which are oppositely arranged, a radar chip is arranged on the first surface of the radar substrate, and a conductive layer and an insulating film arranged on the conductive layer are arranged on the second surface of the radar substrate;
the antenna comprises a high-frequency substrate, a radar substrate and a signal transmission line, wherein the high-frequency substrate is provided with a first surface and a second surface which are oppositely arranged, an antenna element is arranged on the first surface of the high-frequency substrate, a conductive layer and an insulating film arranged on the conductive layer are arranged on the second surface of the high-frequency substrate, and the second surface of the high-frequency substrate is adhered to the second surface of the radar substrate;
the first end of the conductive piece extends out of the first surface of the radar substrate and is electrically connected with the radar chip, and the second end of the conductive piece is electrically connected with the antenna element through the signal transmission line; wherein,,
the conducting layers on the second surfaces of the radar substrate and the high-frequency substrate are arranged at intervals with the periphery of the conducting piece, and annular grooves are formed;
and at least one substrate in the radar substrate and the high-frequency substrate is provided with an isolation groove on the second surface, and the annular groove and the isolation groove are used for realizing coupling connection between the radar substrate conducting layer and the high-frequency substrate conducting layer.
Optionally, a fixing groove is formed in the high-frequency substrate at a position corresponding to the conductive piece, and the second end of the conductive piece is fixed in the fixing groove of the high-frequency substrate in a pluggable manner;
the signal transmission line is a substrate integrated waveguide, and the substrate integrated waveguide is used for coupling signals output by the radar chip through the conductive piece to the antenna element, decoupling the signals from the antenna element and outputting the signals to the radar chip through the conductive piece.
Optionally, the substrate integrated waveguide is arranged in a rectangular shape, and the orthographic projection of the conductive member is located in the edge of the substrate integrated waveguide.
Optionally, a distance between the conductive member and the signal receiving end of the substrate integrated waveguide is a quarter wavelength of a radio frequency signal transmitted by the substrate integrated waveguide.
Optionally, the signal transmission line is disposed on the first surface of the high frequency substrate;
the second end of the conductive member protrudes from the first surface of the high-frequency substrate and is electrically connected to the signal transmission line.
Optionally, the radar chip has a plurality of signal transmission terminals;
the number of the conducting pieces and the number of the signal transmission lines are multiple, the first end of each conducting piece extends out of the first surface of the radar substrate and is electrically connected with the signal transmission end of one radar chip, and the second end of each conducting piece is connected with the antenna element through one signal transmission line.
Optionally, the isolation groove is a concave groove, and the conductive layer between the concave groove and the annular groove forms a strip-shaped transmission belt with a preset length, so that the conductive layers of the two substrates are coupled and connected through the strip-shaped transmission belt.
Optionally, the preset length is a quarter wavelength of the radio frequency signal transmitted by the signal transmission line.
Optionally, the number of the isolation grooves is plural, and the plurality of isolation grooves are disposed on the second surface of the radar substrate or the high-frequency substrate; alternatively, the plurality of isolation grooves are provided on the second surfaces of the radar substrate and the high-frequency substrate.
The invention also provides a millimeter wave radar which comprises the radar component.
According to the technical scheme, the antenna element and the radar chip are arranged on the two substrates, so that when a user needs to use the antennas with different performance indexes, only the corresponding high-frequency substrate needs to be replaced, and the whole assembly does not need to be replaced, so that the antenna with different performance indexes can be flexibly replaced when the radar assembly is used, and the flexibility and the applicability of the radar assembly are improved. In addition, the high-frequency substrate where the antenna element is located needs to be manufactured by using a high-frequency material, the radar substrate where the radar chip is located can be manufactured by using a common FR4 material, the manufacturing process is simple, the antenna element and the radar chip are arranged on the two substrates, the consumption of the high-frequency material can be saved, the complex process for manufacturing the composite board is avoided, the manufacturing difficulty and the production cost of the radar component are reduced, and the problem that the flexibility of the conventional radar component is lower is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic top view of an embodiment of a radar assembly according to the present invention;
FIG. 2 is a schematic side view of a radar assembly according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a substrate integrated waveguide;
FIG. 4 is a schematic diagram of an embodiment of a radar assembly according to the present invention;
FIG. 5 is a schematic view of another embodiment of the radar assembly of the present invention;
FIG. 6 is a schematic top view of a radar assembly according to an embodiment of the present invention;
FIG. 7 is a schematic top sectional view of a radar assembly according to another embodiment of the present invention;
FIG. 8 is a schematic top view of another embodiment of the radar assembly of the present invention;
fig. 9 is a schematic top sectional view of a radar assembly according to another embodiment of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides a radar assembly.
Currently, radar boards typically make the antenna and other chips on the same PCB, forming a single board radar system. The benefit is high integration, but the disadvantages are also apparent, for example, if antennas of different performance indicators are required, the entire PCB must be redesigned, although parts other than the antennas do not need to be changed. In addition, in order to ensure performance, the antenna part is usually manufactured by a high-frequency material substrate, the rest part is only required to be manufactured by common FR4, and the single-board radar system is required to use PCB manufacturing technology of two substrates, so that the manufacturing difficulty is high.
To solve the above problems, referring to fig. 1 to 9, in an embodiment, the radar assembly includes:
the radar device comprises a radar substrate, a first sensor and a second sensor, wherein the radar substrate is provided with a first surface and a second surface which are oppositely arranged, a radar chip is arranged on the first surface of the radar substrate, and a conductive layer and an insulating film arranged on the conductive layer are arranged on the second surface of the radar substrate;
the antenna comprises a high-frequency substrate, a radar substrate and a signal transmission line, wherein the high-frequency substrate is provided with a first surface and a second surface which are oppositely arranged, an antenna element is arranged on the first surface of the high-frequency substrate, a conductive layer and an insulating film arranged on the conductive layer are arranged on the second surface of the high-frequency substrate, and the second surface of the high-frequency substrate is adhered to the second surface of the radar substrate;
the first end of the conductive piece extends out of the first surface of the radar substrate and is electrically connected with the radar chip, and the second end of the conductive piece is electrically connected with the antenna element through the signal transmission line; wherein,,
the conducting layers on the second surfaces of the radar substrate and the high-frequency substrate are arranged at intervals with the periphery of the conducting piece, and annular grooves are formed;
and at least one substrate in the radar substrate and the high-frequency substrate is provided with an isolation groove on the second surface, and the annular groove and the isolation groove are used for realizing coupling connection between the radar substrate conducting layer and the high-frequency substrate conducting layer.
In this embodiment, the radar component is composed of a radar substrate and a high-frequency substrate, wherein, in order to ensure the transmission performance of the antenna, the high-frequency substrate is made of a high-frequency material, and the radar substrate can be made of a common FR4 material. Each substrate is provided with a first surface and a second surface which are oppositely arranged, wherein the first surface of the radar substrate is used for arranging a radar chip and other components, the first surface of the high-frequency substrate is used for arranging an antenna element, the second surfaces of the radar substrate and the high-frequency substrate are respectively provided with a conductive layer, namely a grounding surface, and the conductive layers can be realized by using conductive media such as copper coating.
In order to ensure reliable connection of the inner conductor and the outer conductor, a conductive member is further arranged in the radar component, and the conductive member can be realized by using a probe or other conductive members. The first end of the conductive piece penetrates out of the first surface of the radar substrate and is electrically connected with the radar chip, and the second end of the conductive piece is connected with the antenna element through the signal transmission line. It will be appreciated that the conductive member may be disposed according to the type of signal transmission line, for example, when the signal transmission line is a microstrip line or a coplanar waveguide, the second end of the conductive member may extend out of the first surface of the high-frequency substrate and be disposed and connected to the signal transmission line by welding or the like, so as to realize signal transmission between the radar chip and the antenna and the element. When the signal transmission line is a substrate integrated waveguide, the second end of the conductive member does not extend out of the high-frequency substrate, namely, the conductive member is arranged in a dielectric layer of the high-frequency substrate, so that the conductive member is coupled and connected with the substrate integrated waveguide, and signal transmission between the radar chip and the antenna and between the conductive member and the element can be realized without welding. In addition, the conducting layer and the conducting piece are arranged at intervals on the periphery of the conducting piece through processing methods such as etching, so that an insulating annular groove is formed between the conducting layer and the conducting piece, the conducting piece is prevented from being directly connected with a conducting medium of the conducting layer, the annular groove can be in a shape of a circle, an ellipse, a polygon and the like, and the sizes and the shapes of the annular grooves on the two substrates can be different from each other.
The invention removes the connector for interconnecting the two grounding surfaces and clings the grounding surfaces of the radar substrate and the high-frequency substrate together, thereby reducing the cost and the whole volume of the radar component, but the grounding surfaces of the two substrates are also provided with a layer of insulating film which can be a solder mask film or an insulating film formed by other insulating mediums, so that when the grounding surfaces of the two substrates are clinged together, the insulating film between the two grounding surfaces forms a layer of insulating layer. Therefore, in order to ensure reliable connection of the inner and outer conductors, it is critical to achieve electrical connection between the two ground planes.
A radio frequency transmission line is a distributed parameter transmission line whose transmission characteristics change with position, and in the theory of the transmission line, when a load with impedance ZL is connected to a terminal of a transmission line with characteristic impedance Z0, the input impedance Zin looking into the transmission line will not be Z0. The transmission line impedance equation is as follows:
wherein Z is in Z is the input impedance 0 As characteristic impedance, Z L For the termination impedance, β=2pi/λ, λ is the wavelength of the signal propagating on the transmission line, and l is the length of the transmission line.
As can be seen from the transmission line impedance equation, when the length l of the transmission line is 1/4λ, tan βl=tan (pi/2) is infinity, and Z in the numerator and denominator is based on the concept of the limit 0 And Z L Can be ignored becauseThis gives an impedance transformation equation for a transmission line length l of 1/4λ:
as can be seen from the above equation, if the transmission line length l is 1/4λ, Z is the open termination L Infinity at this point Z in About 0, otherwise, if short-circuited, Z L Equal to 0, at this time Z in Infinity, which is the rule of 1/4 wavelength transmission of a transmission line, i.e. when one end of the transmission line is open, after 1/4 wavelength, its characteristics are represented as "short-circuits", in other words, radio frequency signals can be emitted at the "short-circuit" end of the transmission line, so that a coupling connection with adjacent conductors can be achieved. Based on the characteristic of the transmission line, the invention realizes the non-contact common ground of the two substrates indirectly. The ground plane of any one of the radar substrate and the high-frequency substrate is provided with an isolation groove, so that the two substrates can be indirectly grounded in a non-contact mode, and the following description will be given by taking the arrangement of an isolation groove on the ground plane of the radar substrate as an example. Referring to fig. 6, fig. 6 is a schematic structural diagram of an embodiment of a radar assembly, an isolation groove is formed on a radar substrate ground plane near an annular groove, the isolation groove is a concave groove, so that a conductive medium between the isolation groove and the annular groove is isolated from a conductive medium outside the isolation groove, the conductive medium between the isolation groove and the annular groove forms a strip-shaped band, the length of the strip-shaped band is set to be a preset length, the preset length can be set according to the frequency of a signal transmitted by the substrate in use and the dielectric constant of an insulating film, and the preset length is about 1/4 wavelength of the signal transmitted by a signal transmission line. At this time, the strip forms a 1/4 wavelength transmission line, since both ends of the strip are open-circuited, the RF signal is effectively "short-circuited" at the open-circuited point according to the above-described 1/4 wavelength transmission rule, in other words, the RF signal is electrically connectable across the insulating film at both ends of the strip, that is, the ground planes of the upper and lower substrates are electrically connected by the strip, that isThe ground planes of the upper substrate and the lower substrate can be coupled and connected through the strip-shaped transmission belt, so that the difficulty of electrical connection between the ground planes of the two substrates is solved. In addition, the isolation groove can be a strip groove, and the isolation groove is similar to the strip transmission belt, so that the length of the strip groove is 1/4 wavelength of a signal transmitted by the signal transmission line, and the grounding surfaces of the upper substrate and the lower substrate can be coupled and connected through the strip groove.
According to the technical scheme, the antenna element and the radar chip are arranged on the two substrates, so that when a user needs to use the antennas with different performance indexes, only the corresponding high-frequency substrate needs to be replaced, and the whole assembly does not need to be replaced, so that the antenna with different performance indexes can be flexibly replaced when the radar assembly is used, and the flexibility and the applicability of the radar assembly are improved. In addition, the high-frequency substrate where the antenna element is located needs to be manufactured by using a high-frequency material, the radar substrate where the radar chip is located can be manufactured by using a common FR4 material, the manufacturing process is simple, the antenna element and the radar chip are arranged on the two substrates, the consumption of the high-frequency material can be saved, the complex process for manufacturing the composite board is avoided, and the manufacturing difficulty and the production cost of the radar component are reduced. Meanwhile, the antenna element and the substrate of the radar chip are designed separately, so that the layout of the substrate can be designed more reasonably, the total area of the radar component is reduced, and the manufacturing cost of the radar component can be reduced. According to the invention, the conductive piece is arranged, so that the antenna element and the radar chip can realize signal transmission through the conductive piece, and thus, the inner conductor of the radar component is electrically connected, meanwhile, the conductive piece is arranged in the substrate, and extends out of the first surface of the radar substrate to be electrically connected with the radar chip, so that the length of a signal transmission line can be effectively reduced, the transmission loss of the signal transmission line is reduced, and the accuracy of signals is improved. On the other hand, the annular groove and the isolation groove are arranged, so that the ground planes of the two substrates are tightly attached together to realize the electric connection between the ground planes of the two substrates, the assembly of the radar assembly is simpler while the electric connection of the outer conductor of the radar assembly is met, parts such as connectors and the like are omitted, the overall cost of the radar assembly is reduced, the overall volume of the radar assembly is smaller, the radar assembly is suitable for occasions with high cost requirements and limited installation space, and the practicability and reliability of the radar assembly are improved.
Referring to fig. 1 to 9, in an embodiment, a fixing groove is formed at a position of the high-frequency substrate corresponding to the conductive member, and the second end of the conductive member is removably fixed in the fixing groove of the high-frequency substrate;
the signal transmission line is a substrate integrated waveguide, and the substrate integrated waveguide is used for coupling signals output by the radar chip through the conductive piece to the antenna element, decoupling the signals from the antenna element and outputting the signals to the radar chip through the conductive piece.
In this embodiment, the high-frequency substrate is further provided with a fixing slot for pluggable fixing with the conductive element, so, when the high-frequency substrate is attached to the radar substrate, one end of the conductive element can extend into the fixing slot, that is, is inserted into the fixing slot, so that the conductive element can be pluggable and fixed in the fixing slot, and further the high-frequency substrate and the radar substrate can be pluggable and fixed together through the conductive element and the fixing slot. When the high-frequency substrate is provided with the fixing groove, correspondingly, the signal transmission line on the high-frequency substrate is a substrate integrated waveguide, namely Substrate integrated waveguide, which is also commonly called as a substrate integrated waveguide or a dielectric integrated waveguide, and the substrate integrated waveguide utilizes a metal through hole to realize the field propagation of the waveguide on the dielectric substrate. In other words, as shown in fig. 3, fig. 3 is a schematic structural diagram of an embodiment of a substrate integrated waveguide, where two rows of metal vias are formed on a substrate by using PCB, LTCC or thin film technology, so that electromagnetic waves are confined in rectangular cavities formed by the two rows of metal vias and upper and lower metal boundaries, thereby forming a microwave transmission line of the substrate integrated waveguide.
Optionally, the substrate integrated waveguide is arranged in a rectangular shape, and the orthographic projection of the conductive member is located in the edge of the substrate integrated waveguide.
In this embodiment, the fixing groove of the high-frequency substrate is disposed in a rectangle enclosed by the substrate integrated waveguide, so that when the conductive element is pluggable and fixed in the fixing groove, the orthographic projection of the conductive element is located in the edge of the substrate integrated waveguide, so that the conductive element and the substrate integrated waveguide can be coupled and connected in a coupling excitation manner, and signal transmission between the radar chip and the antenna and element is realized.
Optionally, a distance between the conductive member and the signal receiving end of the substrate integrated waveguide is a quarter wavelength of a radio frequency signal transmitted by the substrate integrated waveguide.
Referring to fig. 4, fig. 4 is a schematic structural diagram of an embodiment of a radar assembly, in which a conductive member is disposed in a rectangle formed by enclosing a substrate integrated waveguide, and according to the above-mentioned 1/4 wavelength transmission rule, a distance between the conductive member and one end of the substrate integrated waveguide is set to be about a quarter wavelength of a radio frequency signal transmitted by the substrate integrated waveguide, so that the conductive member and one end of the substrate integrated waveguide can be coupled and connected in a coupling excitation manner, thereby realizing signal transmission between a radar chip and an antenna and an element.
According to the technical scheme, the fixing grooves are formed in the corresponding positions of the high-frequency substrate, so that the high-frequency substrate and the radar substrate can be fixed in a pluggable manner through the conductive piece, and the electrical connection between the conductive piece and the substrate integrated waveguide can be realized without welding, so that the signal transmission between the radar chip and the antenna and the element can be realized. So set up for radar subassembly's assembly and dismantlement are more convenient, and the user can be when the antenna of different performance index is needed, only need directly change corresponding high frequency substrate and radar base plate assemble together can, need not whole subassembly and change, have improved radar subassembly's suitability and practicality.
Referring to fig. 1 to 9, in an embodiment, the signal transmission line is disposed on a first surface of the high frequency substrate;
the second end of the conductive member protrudes from the first surface of the high-frequency substrate and is electrically connected to the signal transmission line.
In this embodiment, the signal transmission line may be a microstrip line, a coplanar waveguide, or the like, and the signal transmission line is disposed on the first surface of the high-frequency substrate, so that the second end of the conductive member may extend from the first surface of the high-frequency substrate and be fixedly connected to the signal transmission line by welding or other means, so that the conductive member is electrically connected to the signal transmission line, thereby implementing signal transmission between the radar chip and the antenna and element. Referring to fig. 5, fig. 5 is a schematic structural diagram of an embodiment of a radar assembly, in which a signal transmission line is a microstrip line, and a second end of a conductive member extends from a first surface of a high-frequency substrate and is welded with the microstrip line, so that signal transmission between a radar chip and a patch antenna is realized. The arrangement ensures that the conductive piece is directly electrically connected with the signal transmission line, so that the loss of signal transmission can be reduced, the stability of the signal transmission is improved, the radar assembly is suitable for application scenes with higher requirements on the signal transmission, and the stability and the practicability of the radar assembly are improved.
Referring to fig. 1 to 9, in an embodiment, the radar chip has a plurality of signal transmission terminals;
the number of the conducting pieces and the number of the signal transmission lines are multiple, the first end of each conducting piece extends out of the first surface of the radar substrate and is electrically connected with the signal transmission end of one radar chip, and the second end of each conducting piece is connected with the antenna element through one signal transmission line.
It can be understood that the functions of the radar chip become more and more along with the progress of technology, correspondingly, the function pins of the radar chip, that is, the signal transmission ends of the radar chip are more and more, so in this embodiment, the number of the conductive pieces and the signal transmission lines is multiple, and the conductive pieces and the signal transmission lines are respectively used for corresponding to the multiple signal transmission ends of the radar chip, and the radar chip and the antenna element are connected by setting the multiple conductive pieces and the signal transmission lines, so that the radar chip can send different control signals to the antenna element through different signal transmission ends and the conductive pieces, thereby realizing the multi-element control of the radar chip on the antenna element. The plurality of conductive pieces and the signal transmission lines can be arranged according to practical requirements, for example, the plurality of signal transmission lines can be substrate integrated waveguides or microstrip lines, part of the signal transmission lines can be substrate integrated waveguides, the other part of the signal transmission lines are microstrip lines, and the conductive pieces are arranged corresponding to the types of the signal transmission lines, so that different transmission requirements of the antenna elements are met, and the applicability and the practicability of the radar assembly are improved.
Referring to fig. 1 to 9, in an embodiment, the isolation groove is a concave groove, and the conductive layer between the concave groove and the annular groove forms a strip-shaped transmission belt with a preset length, so that the conductive layers of the two substrates are coupled and connected through the strip-shaped transmission belt.
Referring to fig. 6, fig. 6 is a schematic structural diagram of an embodiment of a radar assembly, in which the isolation groove is configured as a concave groove, so that a strip-shaped band is formed by a conductive medium between the concave groove and the annular groove, and the length of the strip-shaped band is set to a preset length, and the preset length can be set according to the frequency of a signal transmitted by the substrate and the dielectric constant of the insulating film when the substrate is in use. It will be appreciated that the line width of the transmission line affects the transmission characteristics of the transmission line, such as the characteristic impedance, capacitance, inductance, etc., and when other physical parameters of the transmission line are fixed, the larger the line width of the transmission line, the more dispersed the current of the transmission line, the smaller the inductance and characteristic impedance of the transmission line, and the larger the unit capacitance of the transmission line. Therefore, the width of the strip-shaped transmission belt can be set according to actual use requirements, so that the formed strip-shaped transmission belt can stably realize electric connection between the two substrate grounding surfaces, and the stability and the applicability of the radar assembly are improved.
Optionally, the preset length is a quarter wavelength of the radio frequency signal transmitted by the signal transmission line.
In an embodiment, the length of the strip-shaped transmission belt is one quarter wavelength of the radio frequency signal transmitted by the signal transmission line, and since both ends of the strip-shaped transmission belt are open, the radio frequency signal is actually "short-circuited" at the open-circuit point according to the 1/4 wavelength transmission rule of the transmission line, in other words, the radio frequency signal is electrically connected to both ends of the strip-shaped transmission belt, that is, the ground planes of the upper substrate and the lower substrate can be electrically connected through the strip-shaped transmission belt, that is, the ground planes of the upper substrate and the lower substrate can be coupled through the strip-shaped transmission belt, thereby solving the problem of electrical connection between the ground planes of the two substrates. According to the invention, the length of the strip-shaped transmission belt is set to be one quarter wavelength of a radio frequency signal transmitted by the signal transmission line by utilizing the 1/4 wavelength transmission rule of the transmission line, so that the electric connection between the two substrate grounding surfaces is realized, parts such as connectors and the like are omitted, the overall cost of the radar assembly is reduced, the overall volume of the radar assembly is reduced, and the practicability and applicability of the radar assembly are improved.
In addition, it can be understood that according to the 1/4 wavelength transmission rule of the transmission line, the length of the strip-shaped transmission belt is set to be one quarter wavelength of the radio frequency signal transmitted by the signal transmission line, so that the electrical connection between the two substrate grounding surfaces can be realized. Therefore, the shape of the strip-shaped transmission belt can be set according to the actual use requirement of the radar assembly, for example, the side wall of the strip-shaped transmission belt can be set to be a curved surface, that is, the transmission path of the strip-shaped transmission belt can be a curve. So, the shape of bar transmission band can set up according to radar subassembly in-service use demand, can satisfy the application scenario of multiple different demands, has improved radar subassembly's practicality and suitability.
Alternatively, the width of the strip-shaped transmission belt may be set to zero, in other words, the isolation groove is rectangular, as shown in fig. 7, fig. 7 is a schematic structural diagram of an embodiment of the radar assembly, where the isolation groove is a strip-shaped groove, the strip-shaped groove corresponds to a transmission slot line, and the length of the strip-shaped groove may be set according to the frequency of the signal transmitted by the substrate and the dielectric constant of the insulating film when the substrate is used. In addition, the isolation groove is arranged to be a strip-shaped groove, so that the molding difficulty of the isolation groove can be reduced, the production cost of the radar component is reduced, and the large-scale production of the radar component is facilitated.
Optionally, the length of the strip-shaped groove is one quarter wavelength of the radio frequency signal transmitted by the radio frequency signal transmission line.
It can be understood that, in the same way as the strip-shaped transmission belt described above, the length of the strip-shaped groove is set to be one quarter wavelength of the radio frequency signal transmitted by the signal transmission line according to the 1/4 wavelength transmission rule of the transmission line, and the transmission groove line formed by the strip-shaped groove can also enable the ground planes of the upper substrate and the lower substrate to be electrically connected through the transmission groove line, that is, the ground plane of the radar substrate and the ground plane of the high-frequency substrate can be coupled and connected through the transmission groove line, so that the difficulty of electrical connection between the ground planes of the two substrates is solved.
Referring to fig. 1 to 9, in an embodiment, the number of the isolation grooves is plural, and the plurality of isolation grooves is provided on the second surface of the radar substrate or the high-frequency substrate; alternatively, the plurality of isolation grooves are provided on the second surfaces of the radar substrate and the high-frequency substrate.
It can be understood that setting up an isolation slot, form a bar transmission band promptly, can realize the electrical connection of the ground plane of radar base plate and the ground plane of high frequency substrate, and in the same way, setting up a plurality of isolation slots, form many bar transmission bands or form many transmission slot lines also can realize the electrical connection of the ground plane of radar base plate and the ground plane of high frequency substrate to can improve the stability of two indirect ground electrical connection of base plate. In an embodiment, referring to fig. 9, fig. 9 is a schematic structural diagram of an embodiment of a radar assembly, in which a plurality of isolation grooves are provided and are disposed around the circumference of the annular groove. It is understood that the plurality of isolation grooves may be disposed on the radar substrate or disposed on the radar substrate according to actual use requirements, or may be disposed on the high-frequency substrate partially or disposed on the radar substrate partially. When a plurality of isolation grooves are formed in the same substrate, the production flow of the radar component can be reduced, so that the production cost of the radar component is reduced, and the large-scale production of the radar component is facilitated. When a plurality of isolation grooves are respectively arranged on the second surfaces of the radar substrate and the high-frequency substrate, the stability of the indirect ground electric connection of the two substrates can be further improved, so that the stability and the practicability of the radar assembly are improved. In addition, the plurality of isolation grooves can be different, for example, the shapes of the plurality of isolation grooves are different, namely, the shapes of the strip-shaped transmission belts formed by the plurality of isolation grooves or the formed transmission groove lines are different, whether the plurality of isolation grooves are communicated with the annular groove or not can also be different, the shapes, the communication conditions and the like of the plurality of isolation grooves can be set according to actual use requirements, so that the radar component can be applied to various different scenes, and the applicability of the radar component is improved.
The invention also provides a millimeter wave radar, which comprises the radar component, and the specific structure of the radar component refers to the embodiment, and because the millimeter wave radar adopts all the technical schemes of all the embodiments, the millimeter wave radar at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (10)
1. A radar assembly, comprising:
the radar device comprises a radar substrate, a first sensor and a second sensor, wherein the radar substrate is provided with a first surface and a second surface which are oppositely arranged, a radar chip is arranged on the first surface of the radar substrate, and a conductive layer and an insulating film arranged on the conductive layer are arranged on the second surface of the radar substrate;
the antenna comprises a high-frequency substrate, a radar substrate and a signal transmission line, wherein the high-frequency substrate is provided with a first surface and a second surface which are oppositely arranged, an antenna element is arranged on the first surface of the high-frequency substrate, a conductive layer and an insulating film arranged on the conductive layer are arranged on the second surface of the high-frequency substrate, and the second surface of the high-frequency substrate is adhered to the second surface of the radar substrate;
the first end of the conductive piece extends out of the first surface of the radar substrate and is electrically connected with the radar chip, and the second end of the conductive piece is electrically connected with the antenna element through the signal transmission line; wherein,,
the conducting layers on the second surfaces of the radar substrate and the high-frequency substrate are arranged at intervals with the periphery of the conducting piece, and annular grooves are formed;
and at least one substrate in the radar substrate and the high-frequency substrate is provided with an isolation groove on the second surface, and the annular groove and the isolation groove are used for realizing coupling connection between the radar substrate conducting layer and the high-frequency substrate conducting layer.
2. The radar assembly of claim 1, wherein the high frequency substrate is provided with a fixing groove corresponding to the conductive member, and the second end of the conductive member is removably fixed in the fixing groove of the high frequency substrate;
the signal transmission line is a substrate integrated waveguide, and the substrate integrated waveguide is used for coupling signals output by the radar chip through the conductive piece to the antenna element, decoupling the signals from the antenna element and outputting the signals to the radar chip through the conductive piece.
3. The radar assembly of claim 2, wherein the substrate integrated waveguide is arranged in a rectangular configuration, and wherein the orthographic projection of the conductive member is located within an edge of the substrate integrated waveguide.
4. The radar assembly of claim 3, wherein a distance between the conductive member and the signal receiving end of the substrate integrated waveguide is one-quarter wavelength of a radio frequency signal transmitted by the substrate integrated waveguide.
5. The radar assembly of claim 1, wherein the signal transmission line is disposed on the first surface of the high frequency substrate;
the second end of the conductive member protrudes from the first surface of the high-frequency substrate and is electrically connected to the signal transmission line.
6. The radar assembly of claim 1, wherein the radar chip has a plurality of signal transmission terminals;
the number of the conducting pieces and the number of the signal transmission lines are multiple, the first end of each conducting piece extends out of the first surface of the radar substrate and is electrically connected with the signal transmission end of one radar chip, and the second end of each conducting piece is connected with the antenna element through one signal transmission line.
7. The radar assembly of claim 1, wherein the isolation groove is a concave groove, and the conductive layer between the concave groove and the annular groove forms a strip-shaped transmission belt of a preset length, so that the conductive layers of the two substrates are coupled and connected through the strip-shaped transmission belt.
8. The radar assembly of claim 7, wherein the predetermined length is one quarter wavelength of a radio frequency signal transmitted by the signal transmission line.
9. The radar assembly of claim 1, wherein the number of isolation grooves is a plurality, the plurality of isolation grooves being disposed on the second surface of the radar substrate or the high frequency substrate; alternatively, the plurality of isolation grooves are provided on the second surfaces of the radar substrate and the high-frequency substrate.
10. A millimeter wave radar comprising a radar assembly according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211094185.8A CN116299186A (en) | 2022-09-07 | 2022-09-07 | Radar component and millimeter wave radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211094185.8A CN116299186A (en) | 2022-09-07 | 2022-09-07 | Radar component and millimeter wave radar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116299186A true CN116299186A (en) | 2023-06-23 |
Family
ID=86778448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211094185.8A Pending CN116299186A (en) | 2022-09-07 | 2022-09-07 | Radar component and millimeter wave radar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116299186A (en) |
-
2022
- 2022-09-07 CN CN202211094185.8A patent/CN116299186A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10403954B2 (en) | Printed circuit board with substrate-integrated waveguide transition | |
| US8232924B2 (en) | Broadband patch antenna and antenna system | |
| US5898408A (en) | Window mounted mobile antenna system using annular ring aperture coupling | |
| US8089327B2 (en) | Waveguide to plural microstrip transition | |
| US6492947B2 (en) | Stripline fed aperture coupled microstrip antenna | |
| US6304220B1 (en) | Antenna with stacked resonant structures and a multi-frequency radiocommunications system including it | |
| US9490768B2 (en) | High frequency band pass filter with coupled surface mount transition | |
| US7746191B2 (en) | Waveguide to microstrip line transition having a conductive footprint for providing a contact free element | |
| US5175560A (en) | Notch radiator elements | |
| US9472855B2 (en) | Antenna device | |
| WO2006098054A1 (en) | Planar antenna module, triplate planar array antenna, and triplate line-waveguide converter | |
| EP3240101B1 (en) | Radiofrequency interconnection between a printed circuit board and a waveguide | |
| US11303004B2 (en) | Microstrip-to-waveguide transition including a substrate integrated waveguide with a 90 degree bend section | |
| US20120182093A1 (en) | Microwave filter | |
| KR20060048273A (en) | Finline type microwave band-pass filter | |
| US20020097108A1 (en) | Transmission line to waveguide mode transformer | |
| US6452462B2 (en) | Broadband flexible printed circuit balun | |
| US5194875A (en) | Notch radiator elements | |
| CN115458938A (en) | Probe antenna and probe thereof | |
| CN116299186A (en) | Radar component and millimeter wave radar | |
| EP4205231A1 (en) | Conformal rf antenna array and integrated out-of-band eme rejection filter | |
| US10651524B2 (en) | Planar orthomode transducer | |
| WO2001018901A1 (en) | Feed structure for electromagnetic waveguides | |
| JP2006245863A (en) | Flexible stripline | |
| JP7407487B1 (en) | Transmission equipment and antenna |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |