CN111562551A - Radar scattering cross section enhanced surface structure for vehicle-mounted radar test - Google Patents
Radar scattering cross section enhanced surface structure for vehicle-mounted radar test Download PDFInfo
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- CN111562551A CN111562551A CN202010351037.4A CN202010351037A CN111562551A CN 111562551 A CN111562551 A CN 111562551A CN 202010351037 A CN202010351037 A CN 202010351037A CN 111562551 A CN111562551 A CN 111562551A
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- 238000012360 testing method Methods 0.000 title claims abstract description 28
- 239000002184 metal Substances 0.000 claims abstract description 56
- 229910052751 metal Inorganic materials 0.000 claims abstract description 56
- 239000000758 substrate Substances 0.000 claims abstract description 51
- 239000010410 layer Substances 0.000 claims abstract description 29
- 239000012790 adhesive layer Substances 0.000 claims abstract description 7
- 239000011159 matrix material Substances 0.000 claims abstract description 5
- 230000002708 enhancing effect Effects 0.000 claims description 8
- 229920001721 polyimide Polymers 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 238000005530 etching Methods 0.000 claims description 3
- 239000005433 ionosphere Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
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- 239000000523 sample Substances 0.000 description 1
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- 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
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses a radar scattering cross section enhanced surface structure for vehicle-mounted radar testing, which comprises an upper medium substrate, a bonding adhesive layer, a metal circuit layer and a lower medium substrate which are sequentially arranged from top to bottom, wherein a metal ionized layer comprises a plurality of metal square rings, the metal square rings are arranged in a two-dimensional matrix manner, and a gap is formed between every two adjacent metal square rings. Compared with the conventional RCS (radar cross section) reinforced surface of the vehicle-mounted radar, the reinforced surface of the scattering cross section of the vehicle-mounted radar provided by the invention has the advantages of simple structure, easiness in processing, light and convenient material, extremely low hardness and convenience in fitting with a test vehicle body. The invention realizes good strong reflection characteristic in performance, has wide relative working bandwidth, and has good stability for various polarized incident radar waves with a pitch angle ranging from 0 degrees to 60 degrees and an azimuth angle ranging from 0 degrees to 360 degrees.
Description
Technical Field
The invention relates to the field of vehicle-mounted radar testing, in particular to a flexible radar scattering cross section enhanced surface for vehicle-mounted radar testing.
Background
RCS (Radar-Cross Section Radar scattering Cross Section) is a means for identifying objects by electromagnetic wave Radar; the larger the RCS object, the easier it is to be identified by the radar system; generally, the RCS of metal and other materials is larger, while the RCS of pedestrians, plastic traffic signs (such as ice cream cones) and the like is smaller. In order to verify the performance of the radar, it is often necessary to simulate the radar reflection characteristics of a real target by means of a booster. Boosters are classified into two broad categories, active and passive, according to the excitation mode. In vehicle radar testing, a passive RCS booster is typically used. Currently common passive RCS boosters are: corner reflector, luneberg lens and microstrip patch array.
The corner reflector is a radar wave reflector with different specifications and made of metal plates according to different purposes. When radar electromagnetic waves are scanned to be reflected at an angle, the electromagnetic waves can be refracted and amplified on a metal angle to generate a strong echo signal, so that the purpose of simulating a radar target is achieved. The luneberg lens is an ellipsoidal multi-faceted refractive lens partially coated with a metallic reflective layer. It can converge the incident electromagnetic wave with specific wavelength and then reflect back along the direction of primary ray. Due to the focusing properties of the luneberg lens on a plane beam, the radar reflection cross-sectional area of the lens is much larger than its physical cross-section when radar waves pass through the lens. Therefore, the Longbo lens can be used as a radar reflector to improve the self radar reflection sectional area. Lobb lenses are primarily used for radar applications in aircraft and ships. The microstrip antenna patch array (enhanced surface) is an antenna array formed by feeding patches by using a microstrip line or a coaxial probe, and has the functions of gathering plane waves radiated by a radar in a certain range and reflecting the plane waves back along the radar transmitting direction.
Microstrip antenna paster array has advantages such as can be conformal, small, consequently use comparatively extensively, but current RCS reinforcing surface material is heavy, hardness is great, difficult conformal, be not suitable for vehicle radar's scene test, can't realize the demand with the laminating of vehicle radar test model automobile body, current RCS reinforcing surface structure is comparatively complicated with processing technology moreover, and the cost is higher, be not suitable for vehicle radar test system to use, consequently it is necessary to do further improvement to be used for the radar cross section reinforcing surface of vehicle radar test.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a radar scattering cross section enhanced surface structure which has extremely low hardness and large plasticity and is convenient to be attached to a vehicle-mounted radar test model vehicle body
In order to achieve the above objects and other related objects, the present invention provides the following technical solutions: the utility model provides a radar scattering cross section reinforcing surface structure for on-vehicle radar test, its includes from last upper dielectric substrate, bonding glue film, metal circuit layer and the lower floor's dielectric substrate that sets gradually down, the metal ionosphere includes a plurality of metal square rings, and a plurality of metal square rings are two-dimensional matrix mode and arrange, are equipped with the clearance between two adjacent metal square rings.
Preferably, the upper dielectric substrate and the lower dielectric substrate are flexible polyimide films.
Preferably, the metal circuit layer and the lower dielectric substrate are of an integral structure, the lower dielectric substrate is a copper-clad flexible dielectric substrate, and the metal circuit layer is a metal circuit layer processed on the copper-clad flexible dielectric substrate by adopting a PCB etching method.
Preferably, the frame of the metal square ring has a certain width.
Preferably, the adhesive layer is epoxy resin.
Preferably, the metal square ring has a square structure.
The technical scheme has the following beneficial effects: compared with the conventional RCS (radar cross section) reinforced surface of the vehicle-mounted radar, the reinforced surface of the scattering cross section of the vehicle-mounted radar provided by the invention has the advantages of simple structure, easiness in processing, light and convenient material, extremely low hardness and convenience in fitting with a test vehicle body. The invention realizes good strong reflection characteristic in performance, has wide relative working bandwidth, and has good stability for various polarized incident radar waves with a pitch angle ranging from 0 degrees to 60 degrees and an azimuth angle ranging from 0 degrees to 360 degrees. The device can be attached to a vehicle-mounted radar test model vehicle body to facilitate simulation detection, and can also be attached to clothes, caps and equipment of children, pedestrians and road participants who perform work on the road; the system can also be used for road facilities such as a traditional reflective ice cream cone, an emergency avoidance mark, RCS for enhancing people and road marks, and is easy for a vehicle-mounted radar to find a target and activate a brake or other active safety systems, so that the occurrence probability of traffic accidents is reduced.
Drawings
FIG. 1 is an exploded view of the layers of the overall structure of a flexible RCS reinforced surface according to the present invention.
FIG. 2 is a side view of a flexible RCS enhanced surface periodic unit structure proposed by the present invention.
FIG. 3 is an exploded view of the layers of the flexible RCS enhanced surface periodic unit structure of the present invention.
Fig. 4 is a front view of a flexible RCS enhanced surface period cell metal circuit layer as proposed by the present invention.
Fig. 5 is a schematic diagram of the inductive and capacitive effects exhibited by the flexible RCS enhanced surface of the present invention on an applied electromagnetic wave.
Fig. 6 is an overall equivalent circuit diagram of the flexible RCS enhanced surface proposed by the present invention in free space.
FIG. 7 shows an example 1 of a flexible RCS enhanced surface according to the present invention for different incident pitch angle θ and azimuth angle in the case of TE polarization of incident radar wave
The reflection coefficient amplitude frequency response diagram (simulation result).
FIG. 8 shows an example 1 of a flexible RCS enhanced surface according to the present invention for different incident pitch angle θ and azimuth angles with incident radar waves having TM polarization
The reflection coefficient amplitude frequency response diagram (simulation result).
FIG. 9 shows a flexible RCS enhanced surface example 2 according to the present invention for different incident pitch angle θ and azimuth angle in the case of TE polarization of incident radar wave
The reflection coefficient amplitude frequency response diagram (simulation result).
FIG. 10 shows a flexible RCS enhanced surface example 2 proposed by the present invention for different incident pitch theta and azimuth angles with incident radar waves being TM polarized
The reflection coefficient amplitude frequency response diagram (simulation result).
Element number description: 1. an upper dielectric substrate; 2. a bonding glue layer; 3. a metal circuit layer; 31. a metal square ring; 4. a lower dielectric substrate.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 10. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
As shown in fig. 1, the patent discloses an enhanced surface structure for enhancing radar cross section of a vehicle-mounted radar test model car, which comprises an upper medium substrate 1, a bonding glue layer 2, a metal circuit layer 3 and a lower medium substrate 4 from top to bottom in sequence. The metal ionosphere 3 includes a plurality of metal square rings 31, the plurality of metal square rings 31 are arranged in a two-dimensional matrix manner, and a gap is provided between two adjacent metal square rings 31.
The reinforced surface formed by the scheme is a two-dimensional matrix surface formed by a plurality of periodic units, the layered structure of each periodic unit is shown in fig. 2 and 3, and the reinforced surface comprises four layers of an upper dielectric substrate 1, an adhesive layer 2, a metal circuit layer 3 and a lower dielectric substrate 4 as well as the whole surface, wherein the metal circuit layer is a metal square ring 31, the preferred metal square ring 31 is of a square structure, and the frame of the metal square ring 31 has a certain width. As shown in fig. 4, ax and ay are the length and width of the periodic unit, dco is the outer side length of the metal square ring, and wco is the line width of the metal square ring frame.
In a preferred embodiment, the upper dielectric substrate 1 and the lower dielectric substrate 4 both use flexible polyimide films. The metal circuit layer 3 and the lower medium substrate 4 can be designed into an integral structure, the lower medium substrate 4 adopts a copper-clad flexible medium substrate, and the metal circuit layer 3 can be a metal circuit layer processed on the copper-clad flexible medium substrate by adopting a PCB etching method. And then is bonded with the upper dielectric substrate 1 through the bonding glue layer 2.
The flexible radar scattering cross section reinforced surface material adopting the structure has the advantages of extremely small hardness, small bending radius, large plasticity, easy processing, light and thin material, simple structure and low production cost. The metal circuit layer 3 is designed into a structure with a plurality of metal square rings 31, the metal reflecting unit is small, and the material eliminates the stress tension of the metal material and the substrate material in repeated bending and folding, so that the metal circuit layer is suitable for repeated bending and twisting. The medium substrate is made of a flexible polyimide film material, so that the environment adaptability is strong, the weather resistance to rainwater, salt mist and the like is strong, and the medium substrate is not easily influenced by the environment.
As shown in fig. 5, two consecutive metal square ring periodic units exhibit inductance and capacitance effects when an electromagnetic wave is applied to the outside, where L1, L2, L3, and L4 are inductances formed by four sides of a square ring, and C1 is a capacitance formed by a gap between square rings. The working principle of the whole enhancement surface can be explained by using the equivalent circuit model shown in fig. 6. Z0 in the model is the free space wave impedance. The upper dielectric substrate passes through a section with a length d1. Characteristic impedance of
Wherein d1 andr1the thickness and the relative dielectric constant of the dielectric substrate are respectively; the adhesive layer has a characteristic impedance of d2
Wherein d2 andr2respectively, the dielectric substrate thickness and the relative dielectric constant; the lower dielectric substrate also passes through a characteristic impedance having a length d3
Wherein d3 andr3 is the dielectric substrate thickness and relative dielectric constant, respectively; in the circuit model, L reflects L1 and L2 inductance effects in FIG. 5, and C reflects C1 capacitance effects in FIG. 5. The series circuit formed by L and C resonates at a specific frequency, and the incident electromagnetic wave is almost totally reflected in the vicinity of the resonant frequency, so that the whole surface exhibits strong reflection, that is, RCS enhancement effect.
In order to further explain the technical scheme of the patent, the following detailed description is made on the embodiments of the patent:
the first embodiment is as follows:
a is used for strengthening the enhancement surface structure of the radar cross section of vehicle radar test model car, upper dielectric substrate 1 and lower dielectric substrate 4 are flexible polyimide substrate, the relative dielectric constant is 3.5, wherein the upper dielectric substrate 1 thickness is 0.0127mm, the lower dielectric substrate 4 thickness is 0.0254 mm; the adhesive layer 2 is made of epoxy resin material, the relative dielectric constant is 3.5, and the thickness is 0.0127 mm; the metal circuit layer 3 is made of rolled copper and has a thickness of 0.018 mm. The inner ring length (the distance between the inner sides of two opposite frames) of the metal square ring 31 is 2.25mm, the line width is 0.2mm, and the gap between the adjacent metal square rings 31 is 0.15 mm.
Fig. 7 and 8 show the strong reflection performance of the embodiment for incident radar waves of different polarizations, different pitch angles and azimuth angles (simulation results), and it can be seen that for incident waves of TE polarization, in the embodiment, for incident waves of 0 degreeA pitch angle of incidence theta in the range of 60 deg. and an azimuth angle of incidence in the range of 0 deg. to 360 deg.
The common strong reflection frequency range with the reflection coefficient of more than-0.915 dB (namely, the reflection coefficient of more than 90 percent) is 15.686 GHz-32.3 GHz; for an incident wave of TM polarization, example 1 has a pitch incident angle θ in the range of 0 ° to 60 ° and an azimuth incident angle in the range of 0 ° to 360 °
The common strong reflection frequency range exhibiting a reflection coefficient above-0.915 dB (i.e. a reflection above 90%) is: 20.36 GHz-29 GHz. It can be seen that this embodiment covers the 24GHz vehicular radar frequency band well. It is worth mentioning that due to the rotational symmetry of the cell structure, for differences
The incident angle case can reflect the case of the full 360 degree range of the angle by only considering the range of 0 ° to 45 °.
Example two
A is used for strengthening the enhancement surface structure of the radar cross section of vehicle radar test model car, upper dielectric substrate 1 and lower dielectric substrate 4 are flexible polyimide substrate, the relative dielectric constant is 3.5, wherein the upper substrate 1 thickness is 0.0127mm, the lower substrate 4 thickness is 0.0254 mm; the bonding layer is made of epoxy resin material, the relative dielectric constant is 3.5, and the thickness is 0.0127 mm; the metal circuit layer is made of rolled copper and has the thickness of 0.018 mm. The length of the inner ring of the square ring is 0.78mm, the line width is 0.15mm, and the gap between adjacent metal square rings 31 is 0.15 mm.
As shown in fig. 9 and 10, which show the strong reflection performance of the embodiment for incident radar waves with different polarization, different pitch angle and azimuth angle (simulation result), it can be seen that for incident waves with TE polarization, the embodiment 2 has a pitch incident angle theta in the range of 0 ° to 60 ° and an azimuth incident angle theta in the range of 0 ° to 360 ° for incident waves with TE polarization
The common strong reflection frequency range with the reflection coefficient of more than-0.915 dB (namely, the reflection coefficient of more than 90 percent) is 50.632 GHz-99.222 GHz; for TM polarized incident waves, example 2 has a pitch incident angle θ in the range of 0 ° to 60 ° and an azimuth incident angle in the range of 0 ° to 360 °
The common strong reflection frequency range exhibiting a reflection coefficient above-0.915 dB (i.e. a reflection above 90%) is: 67.429 GHz-85.398 GHz. It can be seen that the embodiment well covers the 77GHz vehicle-mounted radar frequency band.
Compared with the prior art, the invention has the following beneficial effects:
(1) the flexible radar scattering cross section enhanced surface material provided by the invention has the advantages of extremely low hardness, small bending radius, large plasticity and easiness in processing.
(2) The flexible material provided by the invention adopts smaller metal reflecting units, eliminates the stress stretching of the metal material and the substrate material in repeated bending and folding, and is suitable for repeated bending and twisting.
(3) The flexible radar scattering cross section reinforced surface material provided by the invention is light, extremely thin and simple in structure.
(4) The medium substrate provided by the invention is made of a flexible polyimide film material, has strong environmental adaptability and strong weather resistance to rainwater, salt mist and the like, and is not easily influenced by the environment.
Based on the advantages, the vehicle-mounted radar test model can be attached to a vehicle body of a vehicle-mounted radar test model, so that simulation detection is facilitated, and the vehicle-mounted radar test model can also be attached to clothes, caps and equipment of children, pedestrians and road participants who perform work; the material can also be used for road facilities such as a traditional reflective ice cream cone and an emergency avoidance mark, is used for enhancing RCS of people and road marks, is easy to facilitate a vehicle-mounted radar to find a target and activate a brake or other active safety systems, thereby reducing the occurrence probability of traffic accidents, and can also be applied to the related test of the radar based on the electromagnetic wave principle. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (6)
1. The utility model provides a radar scattering cross section reinforcing surface structure for on-vehicle radar test, its characterized in that, it includes from last upper dielectric substrate, the adhesive layer that sets gradually down, metal circuit layer and lower floor's dielectric substrate, the metal ionosphere includes a plurality of metal square rings, and a plurality of metal square rings are two-dimensional matrix mode and arrange, are equipped with the clearance between two adjacent metal square rings.
2. The radar cross-section enhancing surface structure for vehicle radar testing of claim 1, wherein: the upper dielectric substrate and the lower dielectric substrate are made of flexible polyimide films.
3. The radar cross-section enhancing surface structure for vehicle radar testing of claim 1, wherein: the metal circuit layer and the lower medium substrate are of an integral structure, the lower medium substrate is a copper-clad flexible medium substrate, and the metal circuit layer is formed by processing the copper-clad flexible medium substrate by adopting a PCB (printed Circuit Board) etching method.
4. The radar cross-section enhancing surface structure for vehicle radar testing of claim 1, wherein: the frame of the metal square ring has a certain width.
5. The radar cross-section enhancing surface structure for vehicle radar testing of claim 1, wherein: the adhesive layer is made of epoxy resin.
6. The radar cross-section enhancing surface structure for vehicle radar testing of claim 1, wherein: the metal square ring is of a square structure.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113612031A (en) * | 2021-07-30 | 2021-11-05 | 苏州大学 | Flexible reflection enhanced surface structure for vehicle-mounted radar test and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1120856A1 (en) * | 1999-06-07 | 2001-08-01 | Universidad Politecnica De Madrid | Printed circuit technology multilayer planar reflector and method for the design thereof |
| JP2005210016A (en) * | 2004-01-26 | 2005-08-04 | Sumitomo Electric Ind Ltd | Frequency selecting device |
| JP2007129420A (en) * | 2005-11-02 | 2007-05-24 | Tokyo Denki Univ | Radar reflector |
| CN200986957Y (en) * | 2006-12-12 | 2007-12-05 | 吉林大学 | Dual-bandpass frequency selecting surface film |
| CN110021822A (en) * | 2019-03-19 | 2019-07-16 | 浙江科技学院 | A kind of super surface array antenna of focus type |
| CN213181997U (en) * | 2020-04-28 | 2021-05-11 | 苏州瑞地测控技术有限公司 | Radar scattering cross section enhanced surface structure for vehicle-mounted radar test |
-
2020
- 2020-04-28 CN CN202010351037.4A patent/CN111562551A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1120856A1 (en) * | 1999-06-07 | 2001-08-01 | Universidad Politecnica De Madrid | Printed circuit technology multilayer planar reflector and method for the design thereof |
| JP2005210016A (en) * | 2004-01-26 | 2005-08-04 | Sumitomo Electric Ind Ltd | Frequency selecting device |
| JP2007129420A (en) * | 2005-11-02 | 2007-05-24 | Tokyo Denki Univ | Radar reflector |
| CN200986957Y (en) * | 2006-12-12 | 2007-12-05 | 吉林大学 | Dual-bandpass frequency selecting surface film |
| CN110021822A (en) * | 2019-03-19 | 2019-07-16 | 浙江科技学院 | A kind of super surface array antenna of focus type |
| CN213181997U (en) * | 2020-04-28 | 2021-05-11 | 苏州瑞地测控技术有限公司 | Radar scattering cross section enhanced surface structure for vehicle-mounted radar test |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113612031A (en) * | 2021-07-30 | 2021-11-05 | 苏州大学 | Flexible reflection enhanced surface structure for vehicle-mounted radar test and preparation method thereof |
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