CN106299646A - Based on fluting and broadband, the miniaturization low radar cross section slotline antennas of absorbing material - Google Patents
Based on fluting and broadband, the miniaturization low radar cross section slotline antennas of absorbing material Download PDFInfo
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- CN106299646A CN106299646A CN201610710835.5A CN201610710835A CN106299646A CN 106299646 A CN106299646 A CN 106299646A CN 201610710835 A CN201610710835 A CN 201610710835A CN 106299646 A CN106299646 A CN 106299646A
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- absorbing material
- fluting
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- antenna
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- 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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
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Abstract
The invention discloses a kind of broadband, miniaturization low radar cross section slotline antennas based on fluting with absorbing material, be provided with the medium substrate of band metal coating, super-thin broadband wave-absorbing material layer and strip line line of rabbet joint balun；Radiation tapered slot, outside symmetrical grooving is printed inside the metal coating of upper layer medium substrate upper surface and layer dielectric plate lower surface；Super-thin broadband wave-absorbing material layer is respectively overlay on metal coating outer ledge fluting；Strip line line of rabbet joint balun is printed between two panels medium substrate for radiation tapered slot feed.Present invention achieves and aerial radiation outer rim is reversely suppressed with the effective of clutter interference electric current, and then realize standing wave and the lifting of directional diagram performance；With compared with the broadband slotline antennas of size, antenna keeps good radiation characteristic in 10 octaves, especially has clear superiority in low-frequency range；The present invention synchronizes to eliminate to scatter the strongest edge diffraction and pinnacle diffraction on end-fire class antenna, reaches the purpose of radar signal interception system.
Description
Technical field
The invention belongs to antenna technical field, particularly relate to a kind of low radar of miniaturization based on fluting and absorbing material and cut
Face width band slotline antennas.
Background technology
At present, antenna, as emission of radio frequency signals and reception device, is widely used in broadband connections and microwave sounding system
In system.Due to wideband operation and stealthy needs, miniature ultra wide band low RCS Antenna Design is an important research in this field
Direction.Taper slotline antennas, as a kind of end-fire travelling-wave aerial, has broadband, directional diagram symmetry, is prone to printing, low RCS
Etc. advantage, it is widely used in ultrabroad band radio communication, broadband phased-array radar, the detecting of the passive spectrum signal in broadband and penetrates
The fields such as electricity is astronomical.Taper slotline antennas comprises multiple antenna form.One of which be typically meant that several taper slotline antennas (also known as
For Vivaldi antenna), this antenna structure has the bandwidth of operation of non-constant width.But when lowest operating frequency is relatively low, line of rabbet joint sky
Linear dimension is relatively big, and RCS is the most relatively large, limits its application at stealthy platform.Set accordingly, it would be desirable to antenna is realized miniaturization
Meter, and effectively reduce the RCS of antenna.
Reduce merely antenna size, even cannot apply low-frequency range antenna performance is poor.Its reason is antenna size
During miniaturization, due to antenna line of rabbet joint distal opening size relative wavelength less time, feed energy is even across the end of the line of rabbet joint, also
Failing Net long wave radiation goes out.Accordingly, it is capable to reflection can be formed, and forming reverse current at antenna outward flange, this reflection is with anti-
The directional diagram making antenna to electric current deteriorates with standing wave.To this problem, it has been suggested that the mode at antenna outward flange fluting is carried out
Improve, i.e. increased the path of antenna current by outward flange fluting so that it is progressively decay.But because this portion of electrical current still can produce
Raw radiation, can cause antenna in the deterioration of indivedual frequencies, and such as standing wave deteriorates and directional diagram deteriorates, and the most difficult controls at full frequency band
Characteristic.And these are slotted and also can introduce substantial amounts of edge diffraction, thus the increase of RCS in the range of causing end-fire angular domain, dislike
Change the Stealth Fighter of end-fire class antenna.
Summary of the invention
It is an object of the invention to provide a kind of broadband, miniaturization low radar cross section line of rabbet joint based on fluting with absorbing material
Antenna, it is intended to solving existing miniaturization slotline antennas outward flange electric current and cause broadband performance unstable, standing wave and directional diagram are individual
Other frequency deteriorates, and after side fluting, RCS increases, the problem that Stealth Fighter declines.
The present invention is achieved in that a kind of line of rabbet joint sky, broadband, miniaturization low radar cross section based on fluting with absorbing material
Line, described broadband, miniaturization low radar cross section slotline antennas based on fluting and absorbing material is provided with the medium of band metal coating
Substrate, super-thin broadband wave-absorbing material layer and strip line-line of rabbet joint balun；Upper layer medium substrate upper surface and layer dielectric plate lower surface
Metal coating inside print radiation tapered slot, outside symmetrical grooving；Super-thin broadband wave-absorbing material layer is bonded in medium respectively
On substrate upper and lower metal coating outer ledge fluting；Strip line-line of rabbet joint balun is printed between two panels medium substrate, balun one end
Being connected by sub-miniature A connector with feed system, the other end, through line of rabbet joint root, gives radiation tapered slot feed after overcoupling.
Further, it is printed with finger inside the metal coating of described upper layer medium substrate upper surface and layer dielectric plate lower surface
Number tapered slot, the circular reflection cavity of line of rabbet joint terminal；Outer ledge is etched with periodic rectangular narrow slot.
Further, the above covering super-thin broadband wave-absorbing material layer of described edge fluting；Described super-thin broadband wave-absorbing material
Layer absorbing material overwrite media substrate upper and lower metal coating axial end edge and edge fluting, the end-fire limit of antenna and side.
Broadband, the miniaturization low radar cross section slotline antennas based on fluting with absorbing material that the present invention provides, relates to one
Miniaturization, low RCS, the exponential fade slotline antennas of ultra broadband, it is adaptable to ultra-wideband communications, ULTRA-WIDEBAND RADAR and broadband signal quilt
In the fields such as dynamic detecting.The present invention is used for ultra broadband (UWB) communication system, it is provided that the communication bandwidth about 10 frequencys multiplication.Based on
For ultra wideband radar system after the antenna element group battle array of the present invention, it is provided that the transceiving band about 10 frequencys multiplication, and antenna
Stealth Fighter is good.
As shown in Figure 4, after loading absorbing material, on the one hand, for radiation, absorbing material can be opened with absorption edge
Electric current on groove 3, it is obvious that antenna improves effect in low-frequency range standing-wave ratio, avoids the deterioration of indivedual frequency antenna pattern simultaneously.
Unloaded antenna gain result of calculation as shown in Fig. 5 relatively, loads the absorbing material axial increasing with aft antenna as shown in Figure 6
Benefit is stable, and positive and negative 30 degree of beam edge level smooth steady, and directional diagram stable performance over the entire frequency band is good.
On the other hand, for scattering.Absorbing material covers end-on-fire antenna and scatters the strongest end-fire limit and side, has
Effect reduces antenna RCS in main end-fire angular domain in very broadband.As it is shown in fig. 7, by loading absorbing material, antenna
End-fire edge, drift angle and side scattering be effectively suppressed, antenna is at θ ∈ [-30 ° ,+30 °], the list station of φ=[-45 ,+45 °]
RCS meansigma methods all has reduction in the range of the major part of 2-18GHz.θ, φ are mono-static RCS viewing angle and antenna symmetry axis
Angle.θ ∈ [-30 ° ,+30 °], φ=[-45 ,+45 °], cover topmost end-fire in the actual application of such antenna and threaten
Angular domain.
The present invention compared with prior art, has the advantage that
1, the present invention is the minimized wide-band slotline antennas loaded based on absorbing material, and it is at the frequency model of 10 octaves
Have good radiation characteristic in enclosing, with the general broadband slotline antennas of size in low-frequency range compared with there is obvious advantage.
2, the present invention uses side fluting to load the mode of absorbing material, guides current direction by fluting, and through loading
The absorption repeatedly of absorbing material, it is to avoid the underlying metal short circuit to absorbing material when not slotting.
3, the present invention uses the mode loading absorbing material, and absorbing material can be with absorption edge reverse flow electric current, it is achieved
Effectively suppress reverse and clutter interference electric current, and then realize standing wave and the lifting of directional diagram performance.Antenna E face and H face directional diagram
At beam angles such as the widest frequency band holdings substantially, symmetry is good.
4, the present invention uses absorbing material to cover the both sides of the edge of antenna, end-fire limit linear edge and four drift angles, disappears
Except scattering the strongest edge diffraction and pinnacle diffraction on end-fire class antenna, reach the target that RCS reduces.
Accompanying drawing explanation
Fig. 1 is the line of rabbet joint sky, broadband, miniaturization low radar cross section based on fluting with absorbing material that the embodiment of the present invention provides
Line structure schematic diagram；
In figure: 1, medium substrate；2, the exponential fade line of rabbet joint；3, edge fluting；4, super-thin broadband wave-absorbing material layer；5, banding
Line-line of rabbet joint balun；6, circular reflection cavity.
Fig. 2 is the side view of Fig. 1 that the embodiment of the present invention provides.
Fig. 3 is the top view of Fig. 1 that the embodiment of the present invention provides.
Fig. 4 is the embodiment of the present invention antenna side fluting provided and the standing-wave ratio-frequency pair loaded before and after absorbing material
Than figure.
Fig. 5 is the gain versus frequency comparison diagram before and after the loading absorbing material that the embodiment of the present invention provides.
Fig. 6 is the RCS-frequency contrast figure before and after the loading absorbing material that the embodiment of the present invention provides.
Fig. 7 is the loading of embodiment of the present invention offer and is not loaded with the mono-static RCS of absorbing material antenna in 2-18GHz scope
Interior comparison diagram.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment, to the present invention
It is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not used to
Limit the present invention.
Below in conjunction with the accompanying drawings the structure of the present invention is explained in detail.
As it is shown in figure 1, broadband, the miniaturization low radar cross section line of rabbet joint based on fluting with absorbing material of the embodiment of the present invention
Antenna includes: aerial radiation device, edge grooving apparatus, suction wave apparatus and broadband feeder equipment；Medium substrate 1, exponential fade
The line of rabbet joint 2, edge fluting 3, super-thin broadband wave-absorbing material layer 4, strip line-line of rabbet joint balun 5, circular reflection cavity 6.
Described aerial radiation device is by the exponential fade line of rabbet joint being printed on inside two pieces of medium substrate about 1 metal coatings
2, the circular reflection cavity 6 of line of rabbet joint terminal forms；Described edge 3 devices of slotting are positioned at outside two pieces of medium substrate about 1 metal coatings
Side, described suction wave apparatus is by the super-thin broadband wave-absorbing being respectively overlay in medium substrate about 1 metal coating outer ledge fluting 3
Material layer 4 forms；Described broadband feeder equipment is by the strip line being printed between two panels medium substrate 1-line of rabbet joint balun 5, uses
In feeding to radiant body.
During aerial radiation, feed port the energy entered is coupled to the taper line of rabbet joint 3 root through balun 5, and along the line of rabbet joint
Axis direction is constantly propagated and radiates.High band energy radiates in line of rabbet joint narrower region.Low-frequency range energy is in line of rabbet joint wider part position
Radiation.
In antenna miniaturization designs, when antenna slot line tip dimensions is less than half-wavelength, it is impossible to low by Net long wave radiation
A band energy part is reflected return at end, causes standing-wave ratio to deteriorate；Another part is formed strong at antenna outward flange
Reverse current, brings the severe exacerbation of directional diagram after these current emissions.
If slotting at medium substrate about 1 metal coating outer ledge merely, electric current can be guided to do horizontal mobility repeatedly,
And progressively decay.But the limitation of this method is that on the one hand edge fluting 3 cannot suppress the end causing standing wave to deteriorate by instead
Penetrating energy, on the other hand the electric current on edge fluting 3 still can form radiation, and at some special frequency, this radiation is to directional diagram
Forming relatively large disturbances, pattern characteristics deteriorates.In addition these edges fluting 3 defines a large amount of scattering, causes what RCS controlled to be stranded
Difficult.
As shown in Figures 1 to 3, present invention covering super-thin broadband wave-absorbing material layer 4 on edge fluting 3.Absorbing material
On the one hand the axial end edge of overwrite media substrate about 1 metal coating.On the other hand edge fluting 3 is covered.Should be noted that
Be that super-thin broadband wave-absorbing material layer 4 is not completely covered inside edge fluting 3, to guarantee that electric current is anti-by edge fluting 3 guiding
Resurgent, through super-thin broadband wave-absorbing material layer 4, forms efficient absorption.
Being loaded by such absorbing material, on the one hand absorbing material can suppress axial end edge reflections energy, keeps away
Exempt from standing wave to deteriorate.As shown in Figure 4, after loading absorbing material, it is obvious that antenna improves effect in low-frequency range standing-wave ratio.On the other hand
Absorbing material can be with the electric current on absorption edge fluting 3, it is to avoid the deterioration of indivedual frequency antenna patterns.Relatively such as the institute of Fig. 5
The unloaded antenna gain result of calculation shown, loads absorbing material stable and positive and negative with the on-axis gain of aft antenna as shown in Figure 6
30 degree of beam edge level smooth steady, directional diagram stable performance over the entire frequency band is good.
Finally, absorbing material covers end-on-fire antenna and scatters the strongest end-fire limit and side and drift angle, effectively reduces
Antenna RCS in main end-fire angular domain in very broadband.As it is shown in fig. 7, by loading absorbing material, the end-fire limit of antenna
Edge, drift angle and side scattering are effectively suppressed, and antenna is at θ ∈ [-30 ° ,+30 °], and the mono-static RCS of φ=[-45 ,+45 °] is average
Value all has reduction in the range of the major part of 2-18GHz.θ, φ are mono-static RCS viewing angle and the angle of antenna symmetry axis.θ
∈ [-30 ° ,+30 °], φ=[-45 ,+45 °], cover topmost end-fire in the actual application of such antenna and threaten angular domain.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.
Claims (3)
1. broadband, a miniaturization low radar cross section slotline antennas based on fluting with absorbing material, it is characterised in that described base
Fluting and broadband, the miniaturization low radar cross section slotline antennas of absorbing material are provided with the medium substrate of band metal coating, ultra-thin
Broadband absorbing material layer and strip line-line of rabbet joint balun；The metal of upper layer medium substrate upper surface and layer dielectric plate lower surface covers
Radiation tapered slot, outside symmetrical grooving is printed inside Ceng；It is upper and lower that super-thin broadband wave-absorbing material layer is respectively overlay in medium substrate
On metal coating outer ledge fluting；Strip line-line of rabbet joint balun is printed between two panels medium substrate for radiation gradual change groove
Line feeds.
2., as claimed in claim 1 based on fluting and broadband, the miniaturization low radar cross section slotline antennas of absorbing material, it is special
Levy and be, inside the metal coating of described upper layer medium substrate upper surface and layer dielectric plate lower surface, be printed with exponential fade groove
Line, the circular reflection cavity of line of rabbet joint terminal；Outer ledge is etched with periodic rectangular narrow slot.
3., as claimed in claim 1 based on fluting and broadband, the miniaturization low radar cross section slotline antennas of absorbing material, it is special
Levy and be, the above covering super-thin broadband wave-absorbing material layer of described edge fluting；Described super-thin broadband wave-absorbing material layer inhales ripple material
Material overwrite media substrate upper and lower metal coating axial end edge and edge fluting, for end-fire limit and the side of end-on-fire antenna.
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| CN201610710835.5A CN106299646B (en) | 2016-08-23 | 2016-08-23 | Based on fluting radar cross section low with the miniaturization of absorbing material broadband slotline antennas |
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| CN201610710835.5A CN106299646B (en) | 2016-08-23 | 2016-08-23 | Based on fluting radar cross section low with the miniaturization of absorbing material broadband slotline antennas |
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| CN106299646B CN106299646B (en) | 2019-06-11 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107293853A (en) * | 2017-06-19 | 2017-10-24 | 泰姆瑞技术（深圳）有限公司 | A kind of dual polarized antenna |
| CN107681268A (en) * | 2017-09-08 | 2018-02-09 | 维沃移动通信有限公司 | A kind of antenna structure, preparation method and mobile terminal |
| CN109216918A (en) * | 2017-06-30 | 2019-01-15 | 惠州硕贝德无线科技股份有限公司 | A kind of antenna applied on metal shell and antenna system |
| CN109698400A (en) * | 2017-10-24 | 2019-04-30 | 惠州硕贝德无线科技股份有限公司 | A kind of wideband 5G antenna being integrated in mobile phone metal side frame |
| CN111262034A (en) * | 2018-11-30 | 2020-06-09 | 深圳市通用测试系统有限公司 | Antenna structure |
| CN111463567A (en) * | 2020-04-15 | 2020-07-28 | 西安朗普达通信科技有限公司 | Low RCS ultra-wideband Vivaldi antenna based on differential evolution algorithm |
| CN112186336A (en) * | 2020-08-31 | 2021-01-05 | 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) | Broadband vivaldi antenna integrated with U-shaped groove |
| CN113410639A (en) * | 2021-05-25 | 2021-09-17 | 西安理工大学 | Vivaldi antenna |
| CN113540801A (en) * | 2021-07-20 | 2021-10-22 | 西安电子科技大学 | Large-frequency-ratio dual-frequency antenna based on dual-mode transmission line design |
| CN115280181A (en) * | 2019-12-20 | 2022-11-01 | 加普韦夫斯公司 | Antenna arrangement with low ripple radiation pattern |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107293853A (en) * | 2017-06-19 | 2017-10-24 | 泰姆瑞技术（深圳）有限公司 | A kind of dual polarized antenna |
| CN109216918A (en) * | 2017-06-30 | 2019-01-15 | 惠州硕贝德无线科技股份有限公司 | A kind of antenna applied on metal shell and antenna system |
| CN107681268A (en) * | 2017-09-08 | 2018-02-09 | 维沃移动通信有限公司 | A kind of antenna structure, preparation method and mobile terminal |
| CN109698400A (en) * | 2017-10-24 | 2019-04-30 | 惠州硕贝德无线科技股份有限公司 | A kind of wideband 5G antenna being integrated in mobile phone metal side frame |
| CN111262034A (en) * | 2018-11-30 | 2020-06-09 | 深圳市通用测试系统有限公司 | Antenna structure |
| CN115280181A (en) * | 2019-12-20 | 2022-11-01 | 加普韦夫斯公司 | Antenna arrangement with low ripple radiation pattern |
| CN111463567A (en) * | 2020-04-15 | 2020-07-28 | 西安朗普达通信科技有限公司 | Low RCS ultra-wideband Vivaldi antenna based on differential evolution algorithm |
| CN112186336A (en) * | 2020-08-31 | 2021-01-05 | 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) | Broadband vivaldi antenna integrated with U-shaped groove |
| CN113410639A (en) * | 2021-05-25 | 2021-09-17 | 西安理工大学 | Vivaldi antenna |
| CN113410639B (en) * | 2021-05-25 | 2023-02-21 | 西安理工大学 | Vivaldi antenna |
| CN113540801A (en) * | 2021-07-20 | 2021-10-22 | 西安电子科技大学 | Large-frequency-ratio dual-frequency antenna based on dual-mode transmission line design |
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