CN105742807B - A kind of Vivaldi antenna assemblies applied to imaging system - Google Patents
A kind of Vivaldi antenna assemblies applied to imaging system Download PDFInfo
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- CN105742807B CN105742807B CN201610237239.XA CN201610237239A CN105742807B CN 105742807 B CN105742807 B CN 105742807B CN 201610237239 A CN201610237239 A CN 201610237239A CN 105742807 B CN105742807 B CN 105742807B
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- vivaldi
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
- H01Q1/523—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between antennas of an array
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/02—Waveguide horns
-
- 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
- H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
-
- 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
Abstract
The invention discloses a kind of Vivaldi antenna assemblies applied to imaging system, plane Meta Materials lens are set in antenna tapered slot port using Novel manual electromagnetic material, on the basis of not increasing the intrinsic size of antenna and not destroying E surface radiation characteristics, realize the expansion of H faces pattern beamwidth, further using metal cavity loading come signal mutual coupling between isolated antennas, and by loading three-dimensional metamaterial lens, E-plane and H-plane pattern beam angle is widened, to realize the demand for improving isolation and beam angle at the same time.The Vivaldi antenna assemblies of the present invention solve the problems, such as that existing Vivaldi antennas E surface radiation beam angles are narrow and mutual coupling is too strong, have the advantages that high-isolation, wide beamwidth, easy to process, cost is low, light-weight and size is small easy to integrated.
Description
Technical field
The invention belongs to antenna material field, more particularly to a kind of Vivaldi antenna assemblies applied to imaging system.
Background technology
Novel manual electromagnetic material, also known as Meta Materials, English name Metamaterials, usually by periodicity sub-wavelength gold
Belong to or dielectric structure forms.Described according to Lorentz model, metamaterial structure can effectively coupled electric field or magnetic field and provide
Electric or magnetic resonance characteristic.Since metamaterial unit is usually directed to as sub-wavelength dimensions, meet equivalent medium theory.Meta Materials array
Effective dielectric constant c (ω)-c of plural form can be utilizedr(ω)+ic1(ω) and equivalent permeability μ (ω)=μr(ω)+
iμ1(ω) is described.A series of Meta Materials lens based on zero refractive index, graded index and transform optics are subject to
Research and report.Since Gibson in 1979 develops Vivaldi antennas, this ultra-wideband antenna has obtained extensive concern
And imaging system, communication system and other ultra-wide are applied into system.Vivaldi antennas provide one wide in broadband
The radiation characteristic of H surface waves beam width, narrow E surface waves beam width.Demand in view of particular system to antenna gain, it is a series of to be based on
The zero index lens loading Vivaldi antennas of Meta Materials design are reported.And in imaging systems, especially broadband imaging
In system, to antenna beamwidth, i.e. radiation coverage, it is desirable to very urgent.And original Vivaldi antennas are by design feature
Restriction, widening for E surface wave beam widths can not be effectively provided.Simultaneously as its good H faces coverage, antenna and antenna
Between isolate and can not effectively be inhibited.It is saturating that the present invention proposes a kind of plane Meta Materials loaded in antenna tapered slot port
Mirror, on the basis of not increasing the intrinsic size of antenna and not destroying H surface radiation characteristics, realizes E faces pattern beamwidth
Expansion.In addition, using metal cavity loading come signal mutual coupling between isolated antennas, and by loading three-dimensional metamaterial lens, open up
Wide E-plane and H-plane pattern beam angle, to realize the demand for improving isolation and beam angle at the same time.
The content of the invention
Goal of the invention：In order to solve, existing Vivaldi antennas E surface radiation beam angles are narrow and mutual coupling is too strong asks
Topic, the present invention provide a kind of Vivaldi antenna assemblies applied to imaging system, can not increase the intrinsic size of antenna and
Do not destroy on the basis of H surface radiation characteristics and realize the expansion of E faces pattern beamwidth.
Technical solution：To achieve these goals, the present invention provide a kind of Vivaldi days applied to imaging system it is traditional thread binding
Put, which includes：Two groups of Vivaldi antenna arrays being oppositely arranged, Vivaldi antenna array described in every group are included simultaneously
The multiple Vivaldi antennas set are arranged, the Vivaldi antennas include：Medium substrate, tapered slot, microstrip line and two dimension
Meta Materials lens, the tapered slot are located at the Vivaldi antennas one side opposite with another group of Vivaldi antenna array
On, it is provided with circular resonant cavity at its line of rabbet joint opening beginning；The microstrip line is located on the another side of Vivaldi antennas；Institute
The slot area that two-dimentional Meta Materials lens are located at the tapered slot is stated, the two dimension Meta Materials lens surpass including multiple row " I " type
Material elementary cell, and arranged along the exit direction of antenna, the size of row Meta Materials elementary cell on the outermost side with other
The size of Meta Materials elementary cell is different.
Wherein, Meta Materials elementary cell is symmetric along the center line of the slot area described in each column.
Wherein, the both sides of Vivaldi antenna array described in every group are each provided with one and half rectangular metal outline borders, half square
Shape metal outer frame is isolated the Vivaldi antennas in every group of Vivaldi antenna array, half rectangular metal outline border described in every group
Multi-layer metamaterial array medium inserted sheet is additionally provided between the Vivaldi antennas, every layer of Meta Materials array medium is inserted
On piece is provided with multiple row Meta Materials elementary cell.
Further, the size of half rectangular metal outline border is identical described in every group, and only covers circular on the medium substrate
The rectangular area that the border of resonator is limited to its border.
Further, set at regular intervals between every layer of Meta Materials array medium inserted sheet, and every layer of medium inserted sheet is only
Cover the slot area of tapered slot.
Beneficial effect：The Vivaldi antenna assemblies applied to imaging system in the present invention are new by loading one group of plane
Type artificial electromagnetic material cell array, realizes Q-band Vivaldi antenna broad beam performances.By adjusting metamaterial unit
Size, can efficiently and conveniently adjust lens equivalent index distribution, not influence Vivaldi antenna H faces pattern beam
While width, E faces pattern beamwidth is effectively increased.And planar design is entirely designed as, do not occupy excessive extra
Space, easy to integrated, the program has the characteristics that easy to operate, processing is simple.
Further, three-dimensional metamaterial lens are formed by metal-loaded outline border and multi-layer metamaterial array medium inserted sheet,
Effectively realize high isolation, broad beam characteristic between antenna.The cavity that metal outer frame is formed is believed between effectively inhibiting aerial array
Number cross-interference issue, improves isolation of system degree, in order to avoid the introducing limitation antenna H faces directional diagram half-power beam of metal cavity
Width, meanwhile, in order to improve E faces pattern beamwidth index, loading multilayer surpasses material between metal outer frame and antenna front ends
Expect array medium inserted sheet, while E faces and H surface radiations are optimized, realize E faces and H faces directional diagram broad beam characteristic.
Brief description of the drawings
Fig. 1 is a kind of overall structure diagram of Vivaldi antenna assemblies applied to imaging system of the present invention；
Fig. 2 is the structure diagram of a certain plane Meta Materials lens Vivaldi antennas in Fig. 1；
Fig. 3 is the cellular construction schematic diagram that antenna loads planar lens in Fig. 2；
Fig. 4 is plane Meta Materials lens Vivaldi antenna horizontal direction E faces far-field pattern in Fig. 2；
Fig. 5 is plane Meta Materials lens Vivaldi antennas longitudinal direction H faces far-field pattern in Fig. 2；
Fig. 6 is the overall structure diagram of another Vivaldi antenna assemblies for being applied to imaging system in the present invention；
Fig. 7 is the partial structural diagram with wire chamber and three-dimensional lens Vivaldi antennas in Fig. 6.
Embodiment
To solve the above problems, applicant carried out in depth study：Vivaldi antennas have ultra-wide work as a kind of
The plane end-fire slotline antennas of bandwidth, ultra-wide H faces directional diagram, possess broadband, broad beam, high-gain, it is small, be easily integrated,
The characteristics such as processing cost is low, can very easily be applied to all kinds of end-fire Circuits and Systems.In imaging systems, especially in width
In band imaging system, Vivaldi antennas can substitute transceiver terminal of traditional feed as system.But face large area scanning
During demand, according to traditional Vivaldi antennas self character, which is only capable of the wide area scanning being maintained on vertical antenna direction,
And scanning range is narrow in horizontal plane residing for antenna, areas imaging is extremely limited.Simultaneously because its higher longitudinal direction radiation
Performance, compared to traditional receive-transmit system, between the antenna array unit placed side by side in vertical direction mutual coupling be remarkably reinforced.
In the present invention, the broad beam Vivaldi antennas based on Novel manual electromagnetic material are empty by the Vivaldi antennas line of rabbet joint
The design of single or multiple lift Meta Materials gradual index lens is loaded at gap to realize.
The present invention is further described with reference to embodiment.
Embodiment 1：
In general imaging system, two groups of Vivaldi antenna arrays are separately fixed at test system frame Nei Biao up and down
Face, one of which are responsible for signal transmitting, and another group is responsible for signal reception, and two groups of aerial array opposition place the transmitting-receiving as system
Terminal.As shown in Figure 1, in the present embodiment, the Vivaldi antenna assemblies applied to imaging system include：Two groups of Vivaldi antennas
Array 1 and stent 2, stent 2 are in cube structure, and two groups of Vivaldi antenna arrays 1 are separately positioned on opposite two of stent 2
On inner surface, each Vivaldi antenna array 1 includes the multiple Vivaldi antennas 11 being arranged side by side, by two sides of antenna 11
Face is referred to as front and back, then the front of two groups of Vivaldi antenna arrays 1 is oppositely arranged in stent 2.As shown in Fig. 2,
For any one Vivaldi antenna 11 in aerial array 1, including：Medium substrate 111, tapered slot 112, microstrip line
113, and Meta Materials lens 114；Metal layer is equipped with the positive side of medium substrate 111, utilizes printed-board technology
Perform etching on the metal layer so that the border of metal layer forms circular resonant cavity and tapered slot 112, circular resonant cavity it is interior
The slot area of side and tapered slot 112 is medium exposed region, remaining is metal layer region, the fluting of tapered slot 112
Region flare, forms the radiation port of antenna, and when aerial array 1 is fixed on stent 2, circular resonant cavity side is covered
Cover complete metal layer region with stent 2 to weld together, play the role of micro-strip backboard ground connection；The fluting of tapered slot 112
Two-dimentional Meta Materials lens 114 are placed with region, tapered slot 112 is suspended in free space with two-dimentional Meta Materials lens 114；
Microstrip line 113 is located at another side, that is, back side of medium substrate 111, and one end of microstrip line 113 is extended in medium substrate 111
Point position, to facilitate the periodicity for feed of structuring the formation and symmetry, the other end terminates at one section of fan-shaped cutting back by bending changeover portion
Line, the position of fan-shaped stub are fanned just between the line of rabbet joint opening beginning and circular resonant cavity of tapered slot on front 112
Shape stub intercouples with the circular resonant cavity, and signal is coupled to the line of rabbet joint out of microstrip line, and is transmitted to radiation port, shape
Into the incentive structure of antenna；Two-dimentional Meta Materials lens 114 are arranged on the tubaeform gap of tapered slot 112.As shown in Fig. 2,
Two-dimentional Meta Materials lens 114 are formed including multiple row Meta Materials elementary cell, on the outermost side in the exit direction along antenna
The size of one row Meta Materials elementary cell is different from the size of other row Meta Materials elementary cells, each column Meta Materials elementary cell edge
The center line of slot area is symmetric, and one row metamaterial unit of outermost is used to radiate port to during space radiation
Impedance matching, so as to improve antenna radiation efficiency.As shown in figure 3, each Meta Materials elementary cell is in " I " structure, positioned at " I "
The structure size at structure both ends is L, and the structure size positioned at " I " the structure interlude is D, and structure size L, D can be adjusted effectively
Lens equivalent index distribution is saved, it is wide to widen the wave beam in horizontal plane direction E faces so as to fulfill the adjustment to signal radiation direction
Degree.
Fig. 4, Fig. 5 are respectively the 11 horizontal direction E faces of Vivaldi antennas that two-dimentional Meta Materials lens 114 are loaded in example one
Far-field pattern and longitudinal direction H faces far-field pattern, E faces half-power beam width is about 130 ° as can see from Figure 4, from
It can be seen that H faces half-power beam width has reached 118 ° or so in Fig. 5.
Embodiment 2：
As shown in fig. 6, the Vivaldi antenna assemblies in the present embodiment applied to imaging system also include two groups of Vivaldi
Aerial array 1 and stent 2, as different from Example 1, in the present embodiment, in order to further reduce crosstalk between system, are improved
Isolation between antennas, every group of Vivaldi antenna array 1 are additionally provided with three-dimensional metamaterial lens 3, which wraps
Two and half rectangular metal outline borders 31 and multi-layer metamaterial array medium inserted sheet 32 are included, the identical metal outer frame 31 of two packet sizes will
Vivaldi antenna array 1 is clipped in wherein, and symmetrical relative to Vivaldi antenna array 1,1 liang of Vivaldi antenna array
Every group of metal outer frame 31 of side is isolated each Vivaldi antennas；In the i.e. positive side in antenna line of rabbet joint side, metal frame
Frame 31 is connected with stent 2, and the region that border and the antenna of metal framework 31 are located in free space is concordant, that is, covers circular resonant
The rectangular area that the border of the radiation port of chamber and antenna is limited；In antenna micro strip structure side, that is, reverse side, because of gold
It is suitable with the metal framework size of opposite side to belong to frame 31, only covers Vivaldi aerial radiations end subregion, it is micro- without covering
Band driver unit region, antenna end micro-strip expose in free space；It is internal that the metal framework 31 will be fixed on 2 two-phase of stent
Two groups of aerial arrays 1 on surface are isolated, and radiation-inhibiting signal propagates to receiving antenna array from transmitting antenna array, from
And system interference is reduced, improve isolation；With reference to Fig. 7, it is provided between metal outer frame 31 and Vivaldi antenna array 1
Multi-layer metamaterial array medium inserted sheet 32, it is at regular intervals between every layer of inserted sheet, it is symmetrical to be distributed in Vivaldi antenna array 1
Both sides, and slot areas of 32 covering tapered slots 112 of every layer of medium inserted sheet do not extend to circular resonant cavity location
Domain, i.e., do not cover antenna circular resonant cavity and end microstrip area, on every layer of medium inserted sheet 32 at identical position, i.e.,
At the corresponding position in slotted zones of tapered slot 112, the array of metamaterial unit composition is provided with.
The loading of metal framework 31, has obstructed signal propagation path between antenna, has improved isolation.But it is subject to perimeter strip
The influence of part, H surface wave beam width of the antenna in longitudinal direction in itself is compressed, while horizontal plane E surface waves beam width can not still expire
Sufficient imaging system demand；Beam angle is widened using three-dimensional gradual index lens 3 in the present embodiment, compared to embodiment 1
In planar Meta Materials lens 114 for, the lens in this example occupy larger space, and assembling is comparatively troublesome, but can
To expand horizontal E surface waves beam width and longitudinal direction H surface wave beam widths at the same time, on the premise of wave cover demand is met, significantly
Crosstalk between reduction system.
The present invention has effectively widened the E faces of Vivaldi antennas by loaded planar two dimension Novel manual electromagnetic material lens
Beam angle.By metal-loaded frame and three-dimensional Novel manual electromagnetic material lens, isolation between antenna array is improved, and
Effectively antenna E faces and H surface wave beam widths are widened.
Two kinds of lens composition forms of the present invention, can be by PCB processing technologys large-scale processing and assembling, operation letter
It is single, easy to integrated.
The preferred embodiment of the present invention described in detail above, still, during present invention is not limited to the embodiments described above
Detail, in the range of the technology design of the present invention, a variety of equivalents can be carried out to technical scheme, this
A little equivalents belong to protection scope of the present invention.
Claims (7)
1. a kind of Vivaldi antenna assemblies applied to imaging system, it is characterised in that the antenna assembly includes：Two groups opposite
The Vivaldi antenna array (1) of setting, Vivaldi antenna array (1) described in every group include the multiple Vivaldi being arranged side by side
Antenna (11), the Vivaldi antennas (11) include：Medium substrate (111), tapered slot (112), microstrip line (113) and
Two-dimentional Meta Materials lens (114), the tapered slot (112) be located at the Vivaldi antennas (11) with another group Vivaldi days
On the opposite one side of linear array (1), circular resonant cavity is provided with its line of rabbet joint opening beginning；The microstrip line (113) is located at
On the another side of Vivaldi antennas (11)；The two dimension Meta Materials lens (114) are located at opening for the tapered slot (112)
Groove region, the two dimension Meta Materials lens (114) include multiple row " I " type Meta Materials elementary cell, and along the exit direction of antenna,
The size of row Meta Materials elementary cell on the outermost side is different from the size of other row Meta Materials elementary cells.
2. Vivaldi antenna assemblies according to claim 1, it is characterised in that Meta Materials elementary cell edge described in each column
The center line of the slot area is symmetric.
3. Vivaldi antenna assemblies according to claim 1, it is characterised in that Vivaldi antenna array described in every group
(1) two sides are each provided with one and half rectangular metal outline borders (31), and the half rectangular metal outline border (31) is by every group of Vivaldi
Vivaldi antennas (11) in aerial array (1) are isolated, half rectangular metal outline border (31) described in every group with it is described
Multi-layer metamaterial array medium inserted sheet (32), every layer of Meta Materials array medium are additionally provided between Vivaldi antennas (11)
Multiple row Meta Materials elementary cell is provided with inserted sheet (32).
4. Vivaldi antenna assemblies according to claim 3, it is characterised in that the tapered slot (112) is with being given an account of
Two opposite borders are intersected respectively on matter substrate (111) obtains two boundary points, and the straight line of described two boundary points is passed through in order
For the first boundary line, it is the second boundary line to make the straight line on medium substrate (111) parallel to first boundary line, the circle
Resonator is between first boundary line and the second boundary line, first boundary line, the second boundary line and institute
State the first boundary line, two sections of borders being oppositely arranged that the second boundary line is intercepted in Vivaldi antenna array (1) surround square
Shape region；The size of half rectangular metal outline border (31) is identical described in every group, and covers the rectangular area.
5. Vivaldi antenna assemblies according to claim 3, it is characterised in that every layer of Meta Materials array medium is inserted
Set at regular intervals between piece (32), and every layer of medium inserted sheet (32) only covers the slot area of tapered slot (112).
6. Vivaldi antenna assemblies as claimed in any of claims 1 to 5, it is characterised in that the tapered slot
(112) slot area flare.
7. Vivaldi antenna assemblies as claimed in any of claims 1 to 5, it is characterised in that the microstrip line
(113) one end extends to the point midway of medium substrate (111) a side, and the other end terminates at one section by bending changeover portion
Fan-shaped stub.
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| CN201610237239.XA CN105742807B (en) | 2016-04-15 | 2016-04-15 | A kind of Vivaldi antenna assemblies applied to imaging system |
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| CN107425269B (en) * | 2017-06-21 | 2023-04-21 | 苏州博海创业微系统有限公司 | Multi-frequency common-caliber broadband radiator |
| CN107645070B (en) * | 2017-07-31 | 2020-10-02 | 东南大学 | Multi-beam antenna based on one-dimensional microwave planar lens and double-gradient-groove antenna linear array |
| CN113937492B (en) * | 2021-10-25 | 2023-06-02 | 中国电子科技集团公司第二十九研究所 | Design method of dense array structure of millimeter wave oblique polarization printed antenna array |
| CN114284713B (en) * | 2021-12-28 | 2023-10-20 | 哈尔滨工业大学（威海） | Carrier conformal antenna and beam forming method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202121070U (en) * | 2011-03-08 | 2012-01-18 | 东南大学 | Broadband high-gain flat Vivadi antenna |
| CN103326120A (en) * | 2013-07-03 | 2013-09-25 | 中国船舶重工集团公司第七二四研究所 | High gain broadband dielectric lens Vivaldi antenna |
| CN205646141U (en) * | 2016-04-15 | 2016-10-12 | 东南大学 | Be applied to imaging system's vivaldi antenna device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9627777B2 (en) * | 2011-08-10 | 2017-04-18 | Lawrence Livermore National Security, Llc | Broad band antennas and feed methods |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202121070U (en) * | 2011-03-08 | 2012-01-18 | 东南大学 | Broadband high-gain flat Vivadi antenna |
| CN103326120A (en) * | 2013-07-03 | 2013-09-25 | 中国船舶重工集团公司第七二四研究所 | High gain broadband dielectric lens Vivaldi antenna |
| CN205646141U (en) * | 2016-04-15 | 2016-10-12 | 东南大学 | Be applied to imaging system's vivaldi antenna device |
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