CN203490360U - Echo cancellation system and cover casing - Google Patents
Echo cancellation system and cover casing Download PDFInfo
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- CN203490360U CN203490360U CN201320484173.6U CN201320484173U CN203490360U CN 203490360 U CN203490360 U CN 203490360U CN 201320484173 U CN201320484173 U CN 201320484173U CN 203490360 U CN203490360 U CN 203490360U
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- antenna
- case
- echo cancellation
- cancellation system
- phase shifting
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Abstract
The utility model provides an echo cancellation system, which comprises a first antenna (2), a second antenna (8), and a phase shift unit (6) connected with the first antenna (2) and the second antenna (8). The utility model also provides a cover casing provided with the above echo cancellation system. According to the technical scheme of the utility model, based on the cooperation of the first antenna, the second antenna and the phase shift unit, the cancellation for the radar reflection echo is realized.
Description
Technical field
The case that the utility model relates to a kind of echo cancellation system and has this echo cancellation system.
Background technology
Aspect electromagnetic wave echo, for example, for radar system, the information source of target is that target is in the scattering of the electromagnetic radiation of radar receive direction, the scattered signal of space any point, can expand into a frequency spectrum, in arbitrary given time, each frequency component corresponding certain amplitude and phase place.Target scattering echo itself is exactly the complicated function of frequency, polarization, amplitude.In order to realize the weakening of the echo of destination object or to offset, prior art has following multiple processing mode:
(1) configuration design of optimization aim object itself.But; thereby this conventionally proposes higher requirement to the manufacture of destination object and makes cost higher; for example conventionally can require to avoid the profile any larger plane of appearance of destination object and the junction of convex curvature face, edge, corner angle, tip, gap, breach and square crossing; require destination object to become a kind of smooth excessiveness curve body, and conventionally strict to the tolerance in the gap of joint portion between each element of destination object for fear of secondary radiation.Therefore, the defect of this technological means is, causes manufacturing cost too high owing to having relatively high expectations, and under the situation that does not change destination object profile, how to eliminate or weaken electromagnetism echo.When being mainly low frequency, configuration design does not substantially have and has acted on.
(2) adopt electromagnetic wave absorption material, the electromagnetic wave of attenuation by absorption incident, and electromagnetic energy energy transform into heat energy is dissipated, or make electromagnetic energy be distributed to this material in other direction.This conversion hysteria weakens the mode of electromagnetism echo, while being material and electromagnetic wave phase interaction, produces magnetic hysteresis loss or dielectric loss, makes electromagnetic wave energy transfer heat energy to and dissipates.Conventionally such material cost is higher, and for the destination object that cannot or there is no need to adopt this material, is obviously inapplicable.Absorbing material required during low frequency is thicker.
For electromagnetic wave echo, the technical matters that for example radar reflection echo offsets.Destination object itself (such as outward appearance or material etc., thus aspect manufacture requires) is not being proposed to, under the situation of excessive demand, how to slacken or offset electromagnetic wave echo, prior art does not provide the technical scheme of effective echo cancellation.
Utility model content
The purpose of this utility model is to provide a kind of echo cancellation system and case, and the cooperation by the first antenna, the second antenna and phase shifting equipment realizes radar reflection echo and slackens.
For achieving the above object, the utility model provides a kind of echo cancellation system to comprise on the one hand: the first antenna; The second antenna; And the phase shifting equipment being connected with the second antenna with the first antenna.
Preferably, described antenna is any in unipole antenna, dipole antenna, Yagi antenna, helical antenna, log-periodic antenna, butterfly antenna, parabola antenna.
Preferably, described the first antenna and the second antenna are the antenna with equipolarization direction.
Preferably, described phase shifting equipment is digital phase shift device, comprehensive three-phase phase shifting device, in digital three-phase phase shifting device any.
Preferably, echo cancellation system also comprises: the first amplification/attenuation device, is connected on the connection line between described the first antenna and described phase shifting equipment.
Preferably, echo cancellation system also comprises: the second amplification/attenuation device, is connected on the connection line between described the second antenna and described phase shifting equipment.
On the other hand, the utility model provides a kind of case, has aforementioned arbitrary described echo cancellation system.
Preferably, the first antenna and the second antenna in echo cancellation system are embedded in respectively in the covering of described case.
Preferably, case has radar wave transmission area, inside panel, the matrix of transmission radar wave and the sandwich construction of exterior skin formation served as reasons and set gradually from inside to outside in this radar wave transmission area, and described the first antenna and the second antenna embed in described matrix.
Preferably, described matrix is cellular structure.
Preferably, the material of described matrix is fiberglass.
Preferably, the embedding of described case has the outside surface of the part of described first day line and the second antenna, is smooth excessiveness curve body.
Preferably, described smooth excessiveness curve body is recess.
Preferably, described the first and second antennas and described conformalization of case.
Preferably, in the whole covering that is embedded in described case of described echo cancellation system.
Preferably, described exterior skin and inside panel are for having the glass epoxy of wave transparent effect to radar wave.
Preferably, in the outside surface of described case, on the outside surface except covering, scribble absorption coating.
Preferably, the wing that described case is aircraft or the case of cabin door.
Useful technique effect of the present utility model is:
(1) the utility model is realized active identical with target scattering echo frequency to wave absorption automatically, wherein phase shifting equipment is to entering horizontal phasing control from the radar signal of the first antenna reception, then through the second antenna, launches and active wave absorption slackened target scattering echo; Meanwhile, phase shifting equipment is to entering horizontal phasing control from the radar signal of the second antenna reception, then through the first antenna, launch and active wave absorption is slackened target scattering echo, thereby the utility model can be realized radar reflection echo is slackened.
(2) in the utility model cancellation system, employing amplification attenuating device to the active adjustment (amplifying or decay) that offsets intensity of wave is and target scattering echo strength suitable (or equating), when phase shifting equipment make active when wave absorption is differed to 180 ° (can have error) than target scattering phase of echo (, the utility model can make active automatically contrary with target scattering phase of echo to wave absorption), thereby realize echo cancellation, for example radar reflection echo offsets.
(3) the utility model adopts self-adaptation coping style, and being swift in response can requirement of real time.
(4) case that has the utility model echo cancellation system has been obtained above-mentioned corresponding technique effect.And owing to having adopted covering technology to there are all advantages that covering brings.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of an embodiment of the utility model echo cancellation system.
Fig. 2 is the partial structurtes schematic diagram of the utility model case, wherein shows matrix and covers the exterior skin on body upper surface and cover the inside panel on matrix lower surface.
Embodiment
Referring to accompanying drawing, embodiment of the present utility model is described below.
Referring to Fig. 1, echo cancellation system of the present utility model comprises: the first antenna 2, phase shifting equipment 6, the second antenna 8.Wherein, the first antenna 2 is all connected with phase shifting equipment 6 with the second antenna 8.
6 pairs of radar signals that receive from the first antenna 2 of phase shifting equipment are carried out phase change, then through the second antenna 8, launch and active wave absorption is slackened target scattering echo, so-called target scattering echo is the ripple that electromagnetic wave (for example radar signal of radar emission) is returned by destination object, the utility model is installed or is arranged on destination object, can realize echo and weaken and even offset.Meanwhile, the radar signals that 6 pairs of phase shifting equipments receive from the second antenna 8 are carried out phase change, then through the first antenna 2, launch and active wave absorption are slackened target scattering echo.Thereby the utility model can be realized radar reflection echo is slackened.Phase shifting equipment can be digital phase shift device, comprehensive three-phase phase shifting device, in digital three-phase phase shifting device any.
When phase shifting equipment 6 makes actively when wave absorption is differed than target scattering phase of echo when (be most preferably 180 ° of phase differential, can have error), the utility model can be realized echo is weakened, for example, radar reflection echo is further weakened.Further, when phase shifting equipment makes active when wave absorption is differed to 180 ° (can have error) than target scattering phase of echo, and in the utility model, also adopt the first amplification/attenuation device 12 and the second amplification/attenuation device 14 by active offset intensity of wave adjustment (amplify or decay) for target scattering echo strength quite or equate, thereby the utility model can the most advantageously be realized echo cancellation, for example, realize radar reflection echo and offset.
In order to realize analog to digital conversion, or digital-to-analog conversion, in amplification/attenuation device and phase shifting equipment 6, can be integrated with corresponding analog to digital converter or digital to analog converter.In the utility model, analog to digital converter and digital to analog converter, neither be necessary depending on concrete situation.
In the utility model, the first antenna and the second antenna may be used to radiation and receive electromagnetic wave.The first antenna and the second antenna are preferably any in unipole antenna, dipole antenna, Yagi antenna, helical antenna, log-periodic antenna, butterfly antenna, parabola antenna.The first and second antennas are unrestricted, and any antenna can.In the utility model, the first antenna and the second antenna can have equipolarization direction.Preferably, in the utility model, the first antenna and second day line work in meter wave band, but are not limited to this, can be other frequency ranges.
The utility model cancellation system can not change frequency and polarization mode, therefore active automatically identical with polarization with target scattering echo frequency to wave absorption.
Further, the utility model also provides a kind of case with aforementioned any echo cancellation system of the utility model.In the utility model the first and second antennas be located in the covering of case or the whole covering that is arranged on case of echo cancellation system in, the implication wherein " being arranged in covering " is to be wrapped up by covering, or is arranged in the space that covering surrounds.Preferably, case of the present utility model can be the wing of aircraft or the case of cabin door, but is not limited to this.
Particularly, referring to Fig. 2, case of the present utility model is described, it has the radar wave transmission area for radar wave perspective, and this transmission area is by matrix 5 and covers the exterior skin 1 on matrix 5 upper surfaces and cover the sandwich construction that the inside panel 3 on matrix 5 lower surfaces forms.Wherein matrix 5 is matrixes of transmission radar wave.The utility model echo cancellation system, or the first antenna of echo cancellation system and the second antenna are embedded in matrix 5.
Continuation is referring to Fig. 2, and the preferred structure of matrix 5 is the cellular structure shown in Fig. 2.The material of matrix 5 is preferably fiberglass.Material requirements as for inside panel and exterior skin can have wave transparent effect to radar wave, for example, can be glass epoxy." covering " relating in the utility model, basic identical with the covering relating in the smart skins antenna of unmanned plane.In addition, on the outside surface in the outside surface of case except covering, can also scribble absorption coating, thereby at least for example millimere-wave band radar wave, superhigh frequency band radar wave, VHF band radar wave be had to the effect of the ripple of suction.
In addition, for the consideration of absorbing radar wave, for the first and second antennas, embed the situation in aforementioned substrates 5, the embedding of case can also be had to the outside surface of the part of the first antenna and the second antenna, be set to be smooth excessiveness curve body (for example recess).Certainly, for the situation of whole echo cancellation system embedment matrix 5, the outside surface of appropriate section that also can case is set to be smooth excessiveness curve body.
In case of the present utility model, the first and second antennas of echo cancellation system and conformalization of case.For the ease of understanding the implication of " conformal ", at this, be described as follows for example: for example, conformal antenna is often referred to nonplanar, conformal with the certain objects shape common part of understanding as high speed surface of moving object such as aircrafts of antenna.The important difference of conformal antenna and some structure-integrated antennas is, conformal antenna smoothly integrates with fuselage surface, need to perforate on airframe structure.For aircraft for example, because the structure of conformal antenna with appended object combines together, do not produce extra aerodynamic drag, reduced oil consumption, correspondingly just improved flight.Adopt conformal antenna also will bring great convenience to Platform Designing, the shape of antenna and size are factors very rambunctious for airplane design, and conformal array becomes the design that makes aircraft easily, simultaneously due to without conventional antenna house, signal transmission and emission characteristics are also easily predicted.The utility model case is owing to having adopted covering technology to have all advantages that covering technology is brought.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (19)
1. an echo cancellation system, is characterized in that, comprising:
The first antenna (2);
The second antenna (8); And
The phase shifting equipment (6) being connected with the second antenna (8) with described the first antenna (2).
2. echo cancellation system according to claim 1, is characterized in that,
Described antenna is any in unipole antenna, dipole antenna, Yagi antenna, helical antenna, log-periodic antenna, butterfly antenna, parabola antenna.
3. echo cancellation system according to claim 1, is characterized in that,
Described the first antenna and the second antenna are the antenna with equipolarization direction.
4. according to the echo cancellation system described in any one in claim 1-3, it is characterized in that,
Described phase shifting equipment is digital phase shift device, comprehensive three-phase phase shifting device, in digital three-phase phase shifting device any.
5. according to the echo cancellation system described in any one in claim 1-3, it is characterized in that, also comprise:
The first amplification/attenuation device (12), is connected on the connection line between described the first antenna (2) and described phase shifting equipment (6).
6. echo cancellation system according to claim 5, is characterized in that, also comprises:
The second amplification/attenuation device (14), is connected on the connection line between described the second antenna (8) and described phase shifting equipment (6).
7. a case, is characterized in that, has the echo cancellation system described in aforementioned arbitrary claim.
8. case according to claim 7, is characterized in that, the first antenna and the second antenna in described echo cancellation system are embedded in respectively in the covering of described case.
9. case according to claim 7, it is characterized in that, described case has radar wave transmission area, inside panel (1), the matrix (5) of transmission radar wave and the sandwich construction of exterior skin (3) formation served as reasons and set gradually from inside to outside in this radar wave transmission area, described the first antenna and the second antenna embed in described matrix (5).
10. case according to claim 9, is characterized in that, described matrix (5) is cellular structure.
11. according to the case described in any one in claim 9-10, it is characterized in that, the material of described matrix (5) is fiberglass.
12. according to the case described in any one in claim 9-10, it is characterized in that, the embedding of described case has the outside surface of the part of described first day line and the second antenna, is smooth excessiveness curve body.
13. cases according to claim 12, is characterized in that, described smooth excessiveness curve body is recess.
Case in 14. according to Claim 8-10 described in any one, is characterized in that, described the first and second antennas and described conformalization of case.
15. cases according to claim 7, is characterized in that, described echo cancellation system is whole to be embedded in the covering of described case.
16. according to the case described in any one in claim 9-10,13, it is characterized in that, described exterior skin and inside panel are for having the glass epoxy of wave transparent effect to radar wave.
Case described in 17. according to Claim 8 or 15, is characterized in that, on the outside surface in the outside surface of described case except covering, scribbles absorption coating.
18. cases according to claim 7, is characterized in that, the wing that described case is aircraft or the case of cabin door.
19. cases according to claim 8, is characterized in that, the embedding of described case has the outside surface of the part of described first day line and the second antenna, are smooth excessiveness curve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320484173.6U CN203490360U (en) | 2013-08-08 | 2013-08-08 | Echo cancellation system and cover casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320484173.6U CN203490360U (en) | 2013-08-08 | 2013-08-08 | Echo cancellation system and cover casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203490360U true CN203490360U (en) | 2014-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320484173.6U Expired - Lifetime CN203490360U (en) | 2013-08-08 | 2013-08-08 | Echo cancellation system and cover casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203490360U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104391292A (en) * | 2014-11-18 | 2015-03-04 | 无锡悟莘科技有限公司 | Radar system using main antenna as helical antenna |
-
2013
- 2013-08-08 CN CN201320484173.6U patent/CN203490360U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104391292A (en) * | 2014-11-18 | 2015-03-04 | 无锡悟莘科技有限公司 | Radar system using main antenna as helical antenna |
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| GR01 | Patent grant | ||
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Granted publication date: 20140319 |
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| CX01 | Expiry of patent term |