CN111641047A - Luneberg lens with variable RCS - Google Patents
Luneberg lens with variable RCS Download PDFInfo
- Publication number
- CN111641047A CN111641047A CN202010564885.3A CN202010564885A CN111641047A CN 111641047 A CN111641047 A CN 111641047A CN 202010564885 A CN202010564885 A CN 202010564885A CN 111641047 A CN111641047 A CN 111641047A
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- China
- Prior art keywords
- reflecting surface
- rcs
- luneberg lens
- dielectric
- adjusting rod
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/06—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/23—Combinations of reflecting surfaces with refracting or diffracting devices
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- 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)
Abstract
The invention discloses a Luneberg lens with variable RCS, which comprises a medium ball, a reflecting surface and an adjusting rod; the dielectric ball is composed of a plurality of dielectric layers with sequentially changed dielectric constants; one end of the adjusting rod is fixedly connected with the reflecting surface, and the other end of the adjusting rod is connected with the driving mechanism; the adjusting rod is controlled by the driving mechanism to move so as to drive the reflecting surface to move, and the RCS characteristic of the luneberg ball is adjusted by changing the relative positions of the multilayer medium ball and the reflecting surface; according to the invention, the change of the RCS of the luneberg lens is generated by changing the relative position of the multilayer medium ball and the reflecting surface; the variable RCS Luneberg lens can be used in cooperation with a target needing to change the RCS, and is also suitable for various occasions needing to adjust the RCS.
Description
Technical Field
The invention belongs to the technical field of antennas, and particularly relates to a luneberg lens with variable RCS.
Background
RCS (radar cross section) characterizes the echo intensity of the target under radar wave illumination. At present, there are two main methods, namely active radar intensifier and passive intensification, in which the active radar intensifier amplifies the power of the received radio frequency signal and then radiates the signal through an antenna to increase and adjust the RCS. Passive radar enhancements typically include: the corner reflector is a rigid structure generally composed of mutually perpendicular metal surfaces, the luneberg lens is a dielectric lens taking a spherical shape as a basic shape, electromagnetic waves are converged and reflected by a metal reflecting surface on the surface of the sphere, and the luneberg lens is an efficient and low-cost RCS enhanced reflector.
Chinese patent CN107037407A corner reflector with adjustable width of RCS main lobe azimuth realizes the control of azimuth width by adding an azimuth width adjusting plate on the traditional corner reflector structure, but the maximum RCS value in azimuth can not be changed, and only the azimuth width is changed. Chinese patent CN209182498U "an active enhancer of RCS with controllable gain" discloses an active enhancer of RCS with controllable gain, which includes a control module and enhancers corresponding to a plurality of different wave bands, each enhancer further includes mechanisms such as a controllable gain amplifying link, a coupler, a receiving antenna and a transmitting antenna. The active intensifier simulates the RCS size change of a target at different incidence angles by adjusting the gain of the intensifier in real time, but the system is overall complex and expensive.
Disclosure of Invention
The invention aims to provide a luneberg lens with variable RCS to realize the change of the RCS.
The technical solution for realizing the purpose of the invention is as follows:
a luneberg lens of variable RCS, including medium ball, reflecting surface and regulating lever; the dielectric ball is composed of a plurality of dielectric layers with sequentially changed dielectric constants; one end of the adjusting rod is fixedly connected with the reflecting surface, and the other end of the adjusting rod is connected with the driving mechanism; the adjusting rod is controlled by the driving mechanism to move, so that the reflecting surface is driven to move, and the RCS characteristic of the luneberg ball is adjusted by changing the relative position of the multilayer medium ball and the reflecting surface.
Compared with the prior art, the invention has the following remarkable advantages:
the invention generates the change of the luneberg lens RCS by changing the relative position of the multilayer medium ball and the reflecting surface. The variable RCS Luneberg lens can be used in cooperation with a target needing to change the RCS, and is also suitable for various occasions needing to adjust the RCS.
Drawings
Fig. 1 is a view of a luneberg lens.
Fig. 2 is a side view of the luneberg lens with the reflective surface not moved.
Fig. 3 is a moving back side view of the reflective surface of the luneberg lens.
FIG. 4 is a comparison of RCS before and after the movement of the reflecting surface of the Luneberg lens.
In the figure, 1-inner dielectric layer, 2-middle dielectric layer, 3-outer dielectric layer, 4-reflecting surface and 5-adjusting rod
Detailed Description
The invention is further described with reference to the following figures and embodiments.
With reference to fig. 1-4, the luneberg lens of a variable RCS of the present invention comprises a dielectric sphere, a reflecting surface 4 and an adjusting rod 5; the medium ball can be connected to targets such as unmanned aerial vehicles, ships and warships through the clamp, and can also be connected to the targets through gluing. The dielectric ball is composed of a plurality of dielectric layers with sequentially changed dielectric constants. One end of the adjusting rod 5 is fixedly connected with the reflecting surface 4, the other end of the adjusting rod is connected with the steering engine, the adjusting rod 5 is controlled by the steering engine to move, so that the reflecting surface 4 is driven to move, and the RCS characteristic of the luneberg ball is adjusted by changing the relative position of the multilayer medium ball and the reflecting surface 4.
The medium ball comprises foaming material polyurethane, and reflecting surface 4 is the metal covering, adjusts pole 5 and is the fine combined material pole of glass, possesses strong penetrability of electromagnetic wave. The reflecting surface 4 is fixedly connected with an adjusting rod 5, the movement of the adjusting rod 5 is controlled by a steering engine, and the reflecting surface 4 moves along the axial direction of the adjusting rod 5.
In this embodiment, the dielectric sphere is a three-layer dielectric sphere, and the dielectric sphere is composed of an inner dielectric layer 1, a middle dielectric layer 2, and an outer dielectric layer 3. According to the design rule of the luneberg lens layered medium ball, incident parallel waves pass through the medium layer and then are focused on the reflecting surface, so that a larger RCS is obtained, and the dielectric constant distribution is as follows: 2- (R/R)2R represents the overall size of the reflecting surface 4 from the center of the sphere, and R represents the overall size of each layer of the medium from the center of the sphere. According to the formula: when the radius of the sphere is 30mm, 45mm and 65mm in sequence, the initial distance between the reflecting surface and the dielectric sphere is 10mm, and the dielectric constant is1.95, 1.72 and 1.38 in sequence, in this embodiment, the reflecting surface 4 is a spherical surface, the radius of the reflecting surface 4 is initially set to be 75mm, the spherical center angle of the reflecting surface is 120 degrees, and the radius of the reflecting surface can be adjusted according to actual use requirements. The shape of the reflecting surface 4 is not limited to a spherical surface, and may be other types of flat surfaces or curved surfaces.
The distance between the medium ball and the metal reflecting surface 4 is 10mm in the initial state, and the medium ball is composed of 3 layers of foaming materials with different dielectric constants, so that electromagnetic waves are refracted by the medium ball and then converged on the reflecting surface 4, and then strong backscattering is formed.
The reflecting surface 4 can axially move along the adjusting rod 5 within the movement permission range, and the movement numerical value can be controlled by the steering engine. Assuming that the reflecting surface 4 moves 50mm away from the dielectric sphere 3 after moving, the distance between the reflecting surface 4 and the dielectric sphere 3 changes, so that the scattering intensity of the electromagnetic wave changes correspondingly, and the RCS curves before and after moving are shown in fig. 4.
Taking fig. 2 as an example, it is specified that the electromagnetic wave is incident horizontally, the direction of incidence is 0 ° when the incident direction is aligned with the center of the reflecting surface 4, and the counterclockwise rotation direction is positive when the luneberg lens is viewed in plan. The curve shown in fig. 4 is that the incident frequency point is 10GHz, the pitch angle of the luneberg lens is 0 °, when the reflecting surface 4 moves horizontally by 50mm in the direction away from the dielectric sphere 3, both the RCS scattering intensity and the strong scattering area of the luneberg lens change, the RCS intensity of the luneberg lens is weakened after the movement, and the strong scattering area is also reduced.
Claims (7)
1. The luneberg lens of a variable RCS, characterized by, including medium ball, reflecting surface (4) and regulating lever (5); the dielectric ball is composed of a plurality of dielectric layers with sequentially changed dielectric constants; one end of the adjusting rod (5) is fixedly connected with the reflecting surface (4), and the other end of the adjusting rod is connected with the driving mechanism; the adjusting rod (5) is controlled to move through the driving mechanism, so that the reflecting surface (4) is driven to move, and the RCS characteristic of the luneberg ball is adjusted by changing the relative position of the multilayer medium ball and the reflecting surface (4).
2. The luneberg lens of claim 1, wherein said dielectric sphere is comprised of polyurethane foam.
3. The luneberg lens of variable RCS of claim 1, wherein the adjusting lever (5) is a fiberglass composite lever.
4. A luneberg lens of variable RCS according to claim 1, wherein said reflecting surface (4) is a metal surface.
5. The luneberg lens of variable RCS of claim 1, wherein said dielectric sphere is composed of an inner dielectric layer (1), an intermediate dielectric layer (2), an outer dielectric layer (3); the dielectric constant distribution is: 2- (R/R)2R represents the overall size of the reflecting surface 4 from the center of the sphere, and R represents the overall size of each layer of the medium from the center of the sphere.
6. A luneberg lens of variable RCS according to claim 1, wherein said reflecting surface (4) is spherical, planar or curved.
7. The luneberg lens of claim 1, wherein said drive mechanism is a steering engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010564885.3A CN111641047A (en) | 2020-06-19 | 2020-06-19 | Luneberg lens with variable RCS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010564885.3A CN111641047A (en) | 2020-06-19 | 2020-06-19 | Luneberg lens with variable RCS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111641047A true CN111641047A (en) | 2020-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010564885.3A Pending CN111641047A (en) | 2020-06-19 | 2020-06-19 | Luneberg lens with variable RCS |
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|---|---|
| CN (1) | CN111641047A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111981438A (en) * | 2020-09-09 | 2020-11-24 | 北京环境特性研究所 | Super-surface lens corner reflector |
| CN112363157A (en) * | 2020-11-02 | 2021-02-12 | 上海玥煊科技有限公司 | Radar beacon and radar measurement system |
| CN112363127A (en) * | 2020-10-26 | 2021-02-12 | 北京环境特性研究所 | Radar reflector |
| CN113253220A (en) * | 2021-07-05 | 2021-08-13 | 中国人民解放军国防科技大学 | Radar passive calibrator with variable polarization and insensitive attitude |
| WO2022062885A1 (en) * | 2020-09-28 | 2022-03-31 | 广东福顺天际通信有限公司 | Luneberg lens antenna with adjustable radiation range |
| CN114545406A (en) * | 2022-04-25 | 2022-05-27 | 广东福顺天际通信有限公司 | Programmable reflector |
| CN114597670A (en) * | 2022-03-22 | 2022-06-07 | 中国人民解放军空军工程大学 | Broadband RCS adjustable luneberg lens scatterer based on reflecting surface control |
| CN115303495A (en) * | 2022-09-03 | 2022-11-08 | 北京金朋达航空科技有限公司 | Aircraft RCS adjusting device |
| CN116960638A (en) * | 2023-09-19 | 2023-10-27 | 广东福顺天际通信有限公司 | Reflector with adjustable reflecting surface |
| CN117154417A (en) * | 2023-10-30 | 2023-12-01 | 广东福顺天际通信有限公司 | Electromagnetic wave lens capable of being deformed in compression mode and reflector |
| CN117784070A (en) * | 2023-12-29 | 2024-03-29 | 广东福顺天际通信有限公司 | Variable RCS reflector |
-
2020
- 2020-06-19 CN CN202010564885.3A patent/CN111641047A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111981438A (en) * | 2020-09-09 | 2020-11-24 | 北京环境特性研究所 | Super-surface lens corner reflector |
| WO2022062885A1 (en) * | 2020-09-28 | 2022-03-31 | 广东福顺天际通信有限公司 | Luneberg lens antenna with adjustable radiation range |
| CN112363127A (en) * | 2020-10-26 | 2021-02-12 | 北京环境特性研究所 | Radar reflector |
| CN112363157A (en) * | 2020-11-02 | 2021-02-12 | 上海玥煊科技有限公司 | Radar beacon and radar measurement system |
| CN113253220A (en) * | 2021-07-05 | 2021-08-13 | 中国人民解放军国防科技大学 | Radar passive calibrator with variable polarization and insensitive attitude |
| CN114597670A (en) * | 2022-03-22 | 2022-06-07 | 中国人民解放军空军工程大学 | Broadband RCS adjustable luneberg lens scatterer based on reflecting surface control |
| 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 |
| CN114545406A (en) * | 2022-04-25 | 2022-05-27 | 广东福顺天际通信有限公司 | Programmable reflector |
| CN115303495A (en) * | 2022-09-03 | 2022-11-08 | 北京金朋达航空科技有限公司 | Aircraft RCS adjusting device |
| CN115303495B (en) * | 2022-09-03 | 2023-06-16 | 北京金朋达航空科技有限公司 | RCS adjusting device for aircraft |
| CN116960638A (en) * | 2023-09-19 | 2023-10-27 | 广东福顺天际通信有限公司 | Reflector with adjustable reflecting surface |
| CN116960638B (en) * | 2023-09-19 | 2024-01-12 | 广东福顺天际通信有限公司 | Reflector with adjustable reflecting surface |
| CN117154417A (en) * | 2023-10-30 | 2023-12-01 | 广东福顺天际通信有限公司 | Electromagnetic wave lens capable of being deformed in compression mode and reflector |
| CN117154417B (en) * | 2023-10-30 | 2024-02-20 | 广东福顺天际通信有限公司 | Electromagnetic wave lens capable of being deformed in compression mode and reflector |
| CN117784070A (en) * | 2023-12-29 | 2024-03-29 | 广东福顺天际通信有限公司 | Variable RCS reflector |
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