CN108427101B - RCS passive analog device - Google Patents
RCS passive analog device Download PDFInfo
- Publication number
- CN108427101B CN108427101B CN201810185662.9A CN201810185662A CN108427101B CN 108427101 B CN108427101 B CN 108427101B CN 201810185662 A CN201810185662 A CN 201810185662A CN 108427101 B CN108427101 B CN 108427101B
- Authority
- CN
- China
- Prior art keywords
- layer
- rcs
- lens body
- luneberg lens
- equal
- 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.)
- Active
Links
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
- G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Aerials With Secondary Devices (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a RCS passive simulation device, and relates to the technical field of signal characteristic control. The RCS passive analog device of the invention comprises: the lens comprises a luneberg lens body, a blanking layer and a reflecting layer; the blanking layer is in a spherical crown shape, is attached between the bottom end of the outer surface of the luneberg lens body and the reflecting layer and is used for eliminating RCS frequency response characteristics of the luneberg lens body. The device can realize large dynamic wide-angle-area RCS simulation and eliminate the frequency dependence of the RCS in the conventional simulation device, thereby realizing multiband isometric RCS simulation.
Description
Technical Field
The invention relates to the technical field of signal characteristic control, in particular to an RCS passive simulation device.
Background
In target property simulation applications, existing RCS passive simulation devices have luneberg balls, trihedral corner reflectors, dihedral corner reflectors, flat plates, cylinders, metal balls, spires, and the like.
The frequency response characteristics of the above RCS passive analog devices in the effective response angle domain are very different. The metal ball has frequency response consistency, that is, the RCS size of the metal ball is independent of frequency in the optical zone. However, metal balls can simulate relatively small RCS compared to other RCS passive simulation devices of the same size. In addition, due to the limitation of many factors such as weight, deformation and surface smoothness, the metal ball is selected to be used for RCS simulation in the actual process. Other existing RCS passive analog devices have frequency dependence, that is, the RCS size of these RCS passive analog devices varies with frequency. For example, the RCS magnitude of a luneberg ball is proportional to the square of the frequency. This means that even in the same band, the RCS of the luneberg balls in the high band and the low band may differ by an order of magnitude. Obviously, these existing RCS passive simulation devices cannot meet the requirements of multi-band RCS magnitude simulation.
Aiming at the defects of the prior art, a new RCS passive simulation device is needed to be provided, so that the requirements of RCS simulation in a large dynamic wide-angle domain can be met, and the requirements of multiband RCS equivalent-magnitude simulation can also be met.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the defects in the prior art, the RCS passive simulation device is provided, so that the large dynamic wide-angle domain RCS simulation is realized, and meanwhile, the multiband equivalent RCS simulation is realized.
In order to solve the above technical problems, the present invention provides an RCS passive analog device.
The RCS passive analog device of the invention comprises: the lens comprises a luneberg lens body, a blanking layer and a reflecting layer; the blanking layer is in a spherical crown shape, is attached between the bottom end of the outer surface of the luneberg lens body and the reflecting layer and is used for eliminating RCS frequency response characteristics of the luneberg lens body.
Optionally, the blanking layer is a wave-absorbing coating, and the reflectivity ρ of the wave-absorbing coating satisfies:
in the formula, σ0For the required RCS analog value, λ is the electromagnetic wave wavelength and R is the radius of the luneberg lens body.
Optionally, the blanking layer has substantially the same surface area as the reflective layer, and satisfies:
S＝2πRh
h＝(1-cos0.5θ)*R
wherein S is the surface area of the blanked layer, R is the radius of the luneberg lens body, h is the height of the blanked layer, and θ is the RCS response angular range.
Optionally, the thickness of the blackout layer is less than or equal to 0.5 mm.
Optionally, the luneberg lens body is a multilayer spherical structure, comprising: the core layer and the plurality of spherical shell layers are sequentially arranged from inside to outside; the core layer is composed of two hemispheroids, and each of the plurality of spherical shell layers is composed of two hemispherical shells.
Optionally, the interlayer gap between the core layer and the innermost spherical shell layer and the interlayer gap between adjacent spherical shell layers are both less than or equal to 0.5 mm.
Optionally, the diameter D of the luneberg lens body satisfies: d is more than or equal to 70mm and less than or equal to 400 mm.
Optionally, the reflective layer has a thickness of less than or equal to 0.2 mm.
Optionally, the apparatus further comprises: a skin layer; the skin layer is coated on the outer surface of the whole composed of the luneberg lens body, the blanking layer and the reflecting layer.
Optionally, the thickness d of the skin layer1Satisfies the following conditions: d is not less than 0.5mm1Less than or equal to 1.0 mm; dielectric constant epsilon of the skin layer1Satisfies the following conditions: 1.0. ltoreq. epsilon1≤1.1。
The implementation of the invention has the following beneficial effects: the luneberg ball formed by the luneberg lens body and the reflecting layer is used as a main body structure of the RCS passive simulation device, and the blanking layer is arranged between the luneberg lens body and the reflecting layer, so that the dependence of RCS on frequency existing in the conventional RCS passive simulation device can be eliminated while large dynamic wide-angle-range RCS simulation is realized, and multiband isometric RCS simulation is realized.
Drawings
FIG. 1 is a schematic diagram of the components of an RCS passive analog device according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a Luneberg lens body according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a partial structure of an RCS passive analog device according to an embodiment of the present invention.
In the figure: 1: a Luneberg lens body; 2: a blanking layer; 3: a reflective layer; 4: a skin layer; 101: a core layer; 102. a first spherical shell layer; 103. a second spherical shell layer; 10N: and an outermost spherical shell layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Fig. 1 is a schematic diagram of the components of an RCS passive analog device according to an embodiment of the present invention. As shown in fig. 1, the RCS passive analog device according to the embodiment of the present invention includes: a luneberg lens body 1, a blanking layer 2, a reflective layer 3. Further, the RCS passive analog device of the embodiment of the present invention may further include: a skin layer 4.
The luneberg lens body 1 is spherical and can be formed by foaming polystyrene material. In the RCS passive analog device, the luneberg lens body 1 is mainly used to focus electromagnetic waves. In specific implementation, the diameter of the luneberg lens body can be flexibly set according to the magnitude of RCS to be simulated. Wherein, the preferable range of the diameter D of the luneberg lens body is as follows: d is more than or equal to 70mm and less than or equal to 400 mm.
The specific structure of the luneberg lens body 1 can be seen in fig. 2. As shown in fig. 2, the luneberg lens body 1 has a multilayer spherical structure including: the core layer 101, a plurality of spherical shell layers that set gradually from inside to outside. The plurality of spherical shell layers include: a first spherical shell layer 102, a second spherical shell layer 103 … …, and up to the outermost spherical shell layer 10N. The core layer 101 may be composed of two hemispheres, and each spherical shell layer may be composed of two hemispherical shells. In a preferred embodiment, in order to avoid phenomena such as defocusing, beam tilt, and pattern distortion as much as possible, the luneberg lens body 1 further satisfies: the interlayer gap between the core layer 101 and the first spherical shell layer 102 and the interlayer gap between adjacent spherical shell layers are both less than or equal to 0.5 mm.
The reflecting layer 3 is in a spherical crown shape and is arranged at the bottom end of the outer surface of the luneberg lens body. In the RCS passive analog device, the reflective layer 3 is used to effect reflection of electromagnetic waves to produce radar echoes. Alternatively, the reflective layer 3 may be made of an ultra-thin aluminum foil. In specific implementation, the reflective layer 3 may be cut from a whole aluminum foil or may be formed by splicing multiple aluminum foil sheets. It should be noted that when splicing multiple aluminum foil sheets, no gap is preferably formed at the spliced position. In a preferred embodiment, the reflective layer 3 further satisfies: the thickness of the reflecting layer is less than or equal to 0.2 mm. Through the arrangement, the problem that strong electromagnetic scattering is generated at the edge of the reflecting layer due to the fact that the reflecting layer is too thick, and therefore RCS distribution of the whole RCS passive simulation device is affected can be avoided.
The blanking layer 2 is in a spherical crown shape, is attached between the bottom end of the outer surface of the luneberg lens body 1 and the reflecting layer 3, and is used for eliminating RCS frequency response characteristics of the luneberg lens body. In a preferred embodiment, the blackout layer 2 is a wave absorbing coating. The wave-absorbing coating can be formed by compounding ferrite and magnetic nanoparticles according to certain process requirements, and the electrical property of the wave-absorbing coating shows wave-absorbing or wave-transmitting characteristics along with different frequency bands. Further, in order to play a good role in 'RCS frequency response characteristic of the anarbo lens body', the reflectivity rho of the wave-absorbing coating satisfies the following conditions:
in the formula, σ0For the required RCS analog value, λ is the electromagnetic wave wavelength and R is the radius of the luneberg lens body.
In a preferred embodiment, the blanking layer 2 further satisfies: the thickness of the blanking layer is less than or equal to 0.5 mm. Through above setting, can minimize defocusing effect, improve the reflection of reflection stratum to the electromagnetic wave effect, this is because: the focal point of the luneberg lens body is located at the bottom end thereof, and after the blanking layer is added between the luneberg lens body and the reflective layer, the reflective layer deviates from the focal point, thereby causing a defocusing effect, and the larger the thickness of the blanking layer is, the more serious the defocusing effect is.
The blanking layer is further described below in conjunction with fig. 3. As shown in fig. 3, the blanking layer 2 is attached to the bottom end of the outer surface of the luneberg lens body 1, and the blanking layer can further satisfy: the surface areas of the blanking layer and the reflecting layer are approximately the same, and the following conditions are met:
S＝2πRh
h＝(1-cos0.5θ)*R
wherein S is the surface area of the blanked layer, R is the radius of the luneberg lens body, h is the height of the blanked layer, and θ is the RCS response angular range. In specific implementation, to realize wide-angle-range response, the preferable value range of θ is as follows: θ is greater than or equal to 140 °; the value of R can be selected according to the magnitude of RCS to be simulated.
The skin layer 4 is coated on the outer surface of the whole body consisting of the luneberg lens body 1, the blanking layer 2 and the reflecting layer 3 and used for protecting the internal structure, so that the RCS passive simulation device has certain mechanical strength in the using, transporting and storing processes. In a preferred embodiment, the thickness d of the skin layer is such that the skin layer has a good wave-transmitting property while maintaining a mechanical strength and minimizing the transmission loss of electromagnetic waves, and the skin layer has a thickness d1Satisfies the following conditions: d is not less than 0.5mm1Less than or equal to 1.0 mm; and the dielectric constant ε of the skin layer1Satisfies the following conditions: 1.0. ltoreq. epsilon1Less than or equal to 1.1. In specific implementation, the skin layer can be formed by curing epoxy resin, alkali-free fiber glass cloth, polyamide resin and tetraethylenepentamine.
In the invention, a luneberg ball is selected as a main body component for target characteristic simulation by analyzing the frequency response characteristic of the conventional RCS passive simulation device, and a blanking layer is added between the luneberg lens body and a reflecting layer, so that the RCS passive simulation device of the embodiment of the invention has at least one or more of the following advantages:
1) the device has frequency response consistency, namely the RCS size simulated by the device is irrelevant to the frequency of incident electromagnetic waves, so that the technical bottleneck of multi-band RCS equivalent simulation is solved;
2) the device can realize large dynamic wide-angle RCS simulation;
3) the device has wide application range, and can be widely applied to the development of various shipborne, vehicle-mounted, airborne, ball-borne, missile-borne and satellite-borne target systems and a plurality of fields of passive interference, fake-display and the like.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. An RCS passive analog device, the device comprising: the lens comprises a luneberg lens body, a blanking layer and a reflecting layer; the blanking layer is in a spherical crown shape, is attached between the bottom end of the outer surface of the luneberg lens body and the reflecting layer and is used for eliminating RCS frequency response characteristics of the luneberg lens body;
the blanking layer is a wave-absorbing coating, and the reflectivity rho of the wave-absorbing coating meets the following requirements:
in the formula, σ0The required RCS analog value is obtained, lambda is the electromagnetic wave wavelength, and R is the radius of the luneberg lens body; the blanking layer has substantially the same surface area as the reflective layer and satisfies:
S＝2πRh
h＝(1-cos0.5θ)*R
wherein S is the surface area of the blanked layer, R is the radius of the luneberg lens body, h is the height of the blanked layer, and θ is the RCS response angular range.
2. The apparatus of claim 1, wherein the blackout layer has a thickness of less than or equal to 0.5 mm.
3. The device of claim 1, wherein the luneberg lens body is a multilayer spherical structure comprising: the core layer and the plurality of spherical shell layers are sequentially arranged from inside to outside; the core layer is composed of two hemispheroids, and each of the plurality of spherical shell layers is composed of two hemispherical shells.
4. The apparatus of claim 3, wherein the interlayer spacing between the core layer and the innermost spherical shell layer and the interlayer spacing between adjacent spherical shell layers are each less than or equal to 0.5 mm.
5. The device of claim 4, wherein the diameter D of the Luneberg lens body satisfies: d is more than or equal to 70mm and less than or equal to 400 mm.
6. The device of claim 1, wherein the reflective layer has a thickness of less than or equal to 0.2 mm.
7. The apparatus of claim 1, further comprising: a skin layer; the skin layer is coated on the outer surface of the whole composed of the luneberg lens body, the blanking layer and the reflecting layer.
8. The device of claim 7, wherein the skin layer has a thickness d1Satisfies the following conditions: d is not less than 0.5mm1Less than or equal to 1.0 mm; dielectric constant epsilon of the skin layer1Satisfies the following conditions: 1.0. ltoreq. epsilon1≤1.1。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810185662.9A CN108427101B (en) | 2018-03-07 | 2018-03-07 | RCS passive analog device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810185662.9A CN108427101B (en) | 2018-03-07 | 2018-03-07 | RCS passive analog device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108427101A CN108427101A (en) | 2018-08-21 |
| CN108427101B true CN108427101B (en) | 2020-07-03 |
Family
ID=63157512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810185662.9A Active CN108427101B (en) | 2018-03-07 | 2018-03-07 | RCS passive analog device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108427101B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108919230B (en) * | 2018-10-17 | 2023-05-26 | 北京环境特性研究所 | Combined radar echo enhancer structure |
| CN111504952B (en) * | 2020-04-15 | 2021-09-07 | 成都飞机工业（集团）有限责任公司 | Low-scattering carrier with both horizontal polarization and vertical polarization and testing method thereof |
| CN111981438A (en) * | 2020-09-09 | 2020-11-24 | 北京环境特性研究所 | Super-surface lens corner reflector |
| CN112363127B (en) * | 2020-10-26 | 2023-06-30 | 北京环境特性研究所 | Radar reflector |
| CN112407196B (en) * | 2020-12-04 | 2022-05-31 | 广东福顺天际通信有限公司 | Life buoy |
| CN113552548B (en) * | 2021-07-28 | 2023-09-29 | 北京环境特性研究所 | Radar echo passive simulation device |
| CN114597670B (en) * | 2022-03-22 | 2023-10-03 | 中国人民解放军空军工程大学 | Broadband RCS adjustable Luneberg lens scatterer based on reflection surface control |
| CN115542252B (en) * | 2022-09-21 | 2023-07-04 | 扬州宇安电子科技有限公司 | Device for realizing radar main lobe target simulation and interference based on ground-air combination |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8854257B2 (en) * | 2012-10-22 | 2014-10-07 | The United States Of America As Represented By The Secretary Of The Army | Conformal array, luneburg lens antenna system |
| CN205122780U (en) * | 2015-02-16 | 2016-03-30 | 航天特种材料及工艺技术研究所 | Luneberg lens reflector |
| CN105799260A (en) * | 2016-03-22 | 2016-07-27 | 北京环境特性研究所 | Wave absorbing material for radar camouflage and preparation method thereof |
-
2018
- 2018-03-07 CN CN201810185662.9A patent/CN108427101B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8854257B2 (en) * | 2012-10-22 | 2014-10-07 | The United States Of America As Represented By The Secretary Of The Army | Conformal array, luneburg lens antenna system |
| CN205122780U (en) * | 2015-02-16 | 2016-03-30 | 航天特种材料及工艺技术研究所 | Luneberg lens reflector |
| CN105799260A (en) * | 2016-03-22 | 2016-07-27 | 北京环境特性研究所 | Wave absorbing material for radar camouflage and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| Electromagnetic Scattering by the Luneberg Lens with Reflecting Cap;Haruo Sakurai等;《IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY》;19980531;第40卷(第2期);全文 * |
| 龙伯透镜反射器性能评估预处理方法研究;郭杰等;《航天电子对抗》;20140531;第30卷(第5期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108427101A (en) | 2018-08-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108427101B (en) | RCS passive analog device | |
| CN107275788B (en) | Millimeter wave fan-shaped beam cylindrical luneberg lens antenna based on metal perturbation structure | |
| EP0420137B1 (en) | Two layer matching dielectrics for radomes and lenses for wide angles of incidence | |
| US5563616A (en) | Antenna design using a high index, low loss material | |
| US3315261A (en) | Wide-band radio wave absorber | |
| CN108847530B (en) | Triangular pyramid super-surface antenna housing with wave beam calibration function | |
| CN111981438A (en) | Super-surface lens corner reflector | |
| CN203013936U (en) | Multibeam plane paster lens antenna | |
| CN103050782B (en) | Multi-beam plane patch lens antenna | |
| CN112363127B (en) | Radar reflector | |
| JP7448083B2 (en) | Frequency selective reflectors and reflective structures | |
| CN108933334B (en) | Method and device for manufacturing spherical Longbo electromagnetic lens reflector | |
| CN112350074A (en) | Luneberg lens reflector and passive radar reflecting ball comprising same | |
| Biswas | Design and additive manufacturing of broadband beamforming lensed antennas and load bearing conformal antennas | |
| CN115508798A (en) | Radar characteristic passive simulator | |
| ITMI950970A1 (en) | COMPOSITE MATERIAL STRUCTURE SUITABLE TO ABSORB AND DISSIPATE THE POWER OF ELECTROMAGNETIC RADIATION IN PARTICULAR ACCIDENT | |
| CN110854538B (en) | Microwave metamaterial | |
| Chen et al. | Metantennas: Flat Luneburg lens antennas using transformation optics method (TOM) | |
| JP3822619B2 (en) | Dielectric lens device having omnidirectionality. | |
| JP3297047B2 (en) | Radar reflector | |
| CN111208474A (en) | Passive radar target intensifier | |
| CN111562551A (en) | Radar scattering cross section enhanced surface structure for vehicle-mounted radar test | |
| CN220856918U (en) | Radome with wave absorbing structure | |
| Wu et al. | Design of Luneburg Lens Active Reflector with Tunable RCS | |
| Kumar et al. | A dual-band multi-layer metasurface lens |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |