CN108539422A - The sinuous substrate integration wave-guide near field focus of three-dimensional scans leaky wave slot array antenna - Google Patents
The sinuous substrate integration wave-guide near field focus of three-dimensional scans leaky wave slot array antenna Download PDFInfo
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- CN108539422A CN108539422A CN201810364916.3A CN201810364916A CN108539422A CN 108539422 A CN108539422 A CN 108539422A CN 201810364916 A CN201810364916 A CN 201810364916A CN 108539422 A CN108539422 A CN 108539422A
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- 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
- H01Q13/10—Resonant slot antennas
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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
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
Abstract
A kind of three-dimensional sinuous substrate integration wave-guide near field focus of the present invention scans leaky wave slot array antenna, the global shape of antenna is smooth surface, curved surface is formed by connecting by least two cambered surface, adjacent cambered surface possesses the same tangent plane in intersection, and the both ends of antenna are the planar-fed structure tangent with smooth surface；Antenna includes the medium substrate layer between upper and lower two metal copper clad layers, two metal copper clad layers；Upper metal copper clad layers are equipped with the radiating slot for extending vertically through metal copper clad layers, and the heart line left and right sides is staggered in antennas for radiating slot；Medium substrate layer is equipped with plated-through hole, and plated-through hole is about antenna centerline both sides symmetry arrangement, to form substrate integrated wave guide structure；The present invention is based on the sinuous substrate integration wave-guides of three-dimensional, and substrate integration wave-guide, which is designed as serpentine shape, realizes the focus large area scanning of near field focus leaky-wave antenna, and overcomes the problem that focus reduces in a scan, obtains the performance of focus contour scanning on a large scale.
Description
Technical field
The invention belongs near field focus fields, and in particular to the sinuous substrate integration wave-guide near field focus scanning of millimeter wave three-dimensional
Leaky wave slot array antenna.
Background technology
As near field focus antenna is in the extensive of the fields such as microwave and millimeter wave imaging, wireless power transfer, gate inhibition and radio frequency identification
Using proposing increasingly higher demands to its scanning range, sweep speed and performance.Leaky-wave antenna is as a kind of common day
Line has frequency scanning characteristic.The basic functional principle of the type antenna is to load matched load in antenna terminal so that device
It is operated in traveling-wave mode, the phase distribution needed for the position Synthesis by adjusting antenna element realizes required directional diagram figuration.
The substrate integration wave-guide being used widely in recent years, not only the filter with low insertion loss with waveguiding structure and low leakage rediation characteristic, go back
High integration characteristic with microstrip line provides good design platform for emerging low section slot array antenna.
It is one by being applied near field focus scanning field with the substrate integration wave-guide leaky wave slot array antenna for sweeping ability frequently
Kind selection well.But compared to far field, due to the particularity near field focus field, energy is regulated and controled to the phase of transmission structure
The requirement higher of power.In near field focus Shape design, it is desirable that the bore phase of near field antenna needs to meet square-power change.Its
It is typically characterised by, with the expansion of array, the phase needed for array bore accelerates variation.The phase distribution that this square-law accelerates
It is a major challenge for conventional transmission structure.
The prior art is used for realizing that the scheme one of leaky-wave antenna near field focus is modified to transmission line width to change
The design of its propagation constant and then realization propagation phase (refers to [1]-[2]：[1]J.L.Gómez-Tornero,F.Quesada-
Pereira,A.A lvarez-Melcón,G.Goussetis,A.R.Weily,and Y.J.Guo,“Frequency
steerable two dimens ional focusing using rectilinear leaky-wave lenses,”IEEE
Trans.Antennas Propag.,vol.59,no.2,pp.407–415,Feb.2011.[2]A.J.Martínez-Ros,
J.L.Gómez-Tornero,and G.Gouss etis,“Holographic pattern synthesis with
modulated substrate integrated waveguide line-sourc e leaky-wave antennas,”
IEEE Trans.Antennas Propag., vol.61, no.7, pp.3466-3474, Jul.2013.) but the propagation of variation
Constant will generate frequency different responses, cause its focus to deteriorate with frequency scanning characteristic, the application in scanning field
It is limited.Scheme (refers to second is that being adjusted to radiating element spacing：S.Clauzier,S.A vrillon,L.Le Coq,
M.Himdi,F.Colombel,and E.Rochefort,“Slotted waveguide antenna with a near-
field focused beam in one plane,”IET Microw.Antennas Propag.,vol.9,no.7,
Pp.634-639,2015.) it realizes that phase regulates and controls, but because of near field quadratic phase accelerating performance, array edges can be caused
Cell spacing will become too much, cannot be satisfied the scanning demand of near field focus.In addition, both the above scheme, all exists and sweeps
The phenomenon that focal spot height caused by effective aperture rapid decrease reduces during retouching cannot achieve a wide range of contour scanning.
The it is proposed of the sinuous substrate integration wave-guide of three-dimensional, to capture near field focus, the leaky-wave antenna of contour scanning is set on a large scale
Meter problem provides new thinking.In general traditional microwave device is mostly planar structure, if making full use of longitudinal dimension, i.e.,
Device architecture is designed by the way of three-dimensional layout rather than conventional two-dimensional layout, effectively transmission is promoted using 3 D stereo design
The width phase ability of regulation and control of structure, so that it may to realize complicated wave beam Shape design that conventional planar structure is difficult to complete.Therefore, it is based on
The sinuous substrate integration wave-guide of three-dimensional, to realize that the leaky wave slot array antenna of near field focus contour scanning on a large scale has very high grind
Study carefully meaning.
Invention content
Present invention aims in order to overcome in the scanning leaky-wave antenna design of above-mentioned near field focus, because near field focus is special
The bore phase distribution of square-power change require and scanning process in effective aperture rapid decrease characteristic, so as to cause tradition
Graphic design method cannot achieve the problem of the height large area scanning such as near field focus, be based on three-dimensional sinuous substrate integration wave-guide,
A kind of three-dimensional sinuous substrate integration wave-guide leaky wave slot array antenna structure is proposed, by the serpentine for rationally designing antenna
Shape is made full use of longitudinal dimension to realize the bore phase distribution needed near field focus, while being eliminated using the serpentine shape of antenna
The influence of antenna scanning focusing point height, to solve the difficulty that conventional planar leaky-wave antenna cannot achieve a wide range of contour scanning
Topic.
For achieving the above object, specific technical solution of the present invention is as follows：
A kind of three-dimensional sinuous substrate integration wave-guide near field focus scanning leaky wave slot array antenna, the global shape of antenna is light
Sliding curved surface, the curved surface are connected smoothly by least two cambered surface, and the both ends of antenna are and smooth surface phase
The planar-fed structure cut；The antenna includes the medium between upper and lower two metal copper clad layers and two metal copper clad layers
Substrate layer；Upper metal copper clad layers are equipped with the radiating slot for extending vertically through metal copper clad layers, and the radiating slot is in antennas
It is staggered at left and right sides of heart line；Medium substrate layer is equipped with plated-through hole, and plated-through hole is about antenna centerline both sides
Symmetry arrangement, to form substrate integrated wave guide structure.
It is preferred that the arc length distance, delta L between i-th of radiating slot and i+1 radiating slotiWith this two
Drop shadow curve functional equation z=f of the curved surface in xoz planes between radiating sloti(x) equation group should be met：
Wherein xiAnd riBetween the abscissa of respectively i-th radiating slot, i-th of radiating slot and near field focus point
Distance (i >=1)；Z=fi(x) projection of the curved surface between i-th of radiating slot and i+1 gap in xoz planes is bent
Line function equation, while fi(x) and fi+1(x) it needs in xi+1Place's intersection, and the two is in xi+1The derivative at place is equal；ΔLiIt is two
Arc length distance between a gap, is obtained by the arc-length integration to curvilinear equation；z0Indicate the height of near field focus point, fi
(xi) be i-th of radiating slot ordinate；K and β is respectively the biography with the electromagnetic wave in substrate integration wave-guide in free space
Broadcast constant.
It is preferred that two metal copper clad layers and medium substrate layer are processed to obtain by plane PCB technology, then paste
Close and be fixed on three-dimensional sinuous carrier to form three-dimensional sinuous chip integrated waveguide slot array antenna, the sinuous carrier of three-dimensional and
The shape of the smooth surface is consistent.
It is preferred that radiating slot has 24, width, length are consistent.
It is preferred that feed structure is the T-shaped structure that microstrip line is transitioned into substrate integration wave-guide.
It is preferred that three-dimensional sinuous carrier is obtained by the method for 3D printing.
The beneficial effects of the present invention are：
(1) the present invention is based on the concept of three-dimensional sinuous substrate integration wave-guide, substrate integration wave-guide is designed as certain wriggle
Yan shapes, the width to break through conventional planar mutually regulate and control thought, simplify the design difficulty of device, and the width for improving device mutually regulates and controls energy
Power.
(2) the present invention provides a kind of substrate integration wave-guide three-dimensional serpentine structures of specific shape.And the structure is used for
Devise a three-dimensional sinuous substrate integration wave-guide near field focus scanning leaky wave slot array antenna.The antenna breaks through traditional near field
The planar design thinking of antenna realizes the focus large area scanning of near field focus leaky-wave antenna by three-dimensional serpentine design, and
The problem that focus reduces in a scan is overcome, the performance of focus contour scanning on a large scale is obtained.
(3) the present invention provides a kind of lap gating systems of three-dimensional sinuous substrate integration wave-guide near field focus contour scanning on a large scale
The synthesis iterative calculation method of antenna.
(4) the present invention provides one kind by inexpensive plane PCB technology making antenna, and fitting is fixed on what three-dimensional was wriggled
On carrier, the method to form three-dimensional sinuous chip integrated waveguide slot array antenna.
Description of the drawings
Fig. 1 is plane leaky-wave antenna near field focus Shape design principle schematic.
Fig. 2 is the design principle schematic diagram that three-dimensional sinuous substrate integration wave-guide near field focus scans leaky wave slot array antenna.
Fig. 3 is three-dimensional sinuous geometrical relationship of the chip integrated waveguide slot array antenna in rectangular coordinate system.
Fig. 4 is three-dimensional sinuous chip integrated waveguide slot position and planar substrates integrated waveguide slot position in embodiment
Comparison diagram.
Fig. 5 is the side view that three-dimensional sinuous substrate integration wave-guide near field focus scans leaky wave slot array antenna in embodiment.
Fig. 6 is that three-dimensional sinuous substrate integration wave-guide near field focus scanning leaky wave slot array antenna is integrally illustrated in embodiment
Figure.
Fig. 7 is that three-dimensional sinuous substrate integration wave-guide near field focus scanning leaky wave slot array antenna planar development shows in embodiment
It is intended to (plane machining schematic diagram).
Fig. 8 is that three-dimensional sinuous substrate integration wave-guide near field focus scanning leaky wave slot array antenna plane machining is thin in embodiment
Save enlarged drawing.
Fig. 9 is the 3D processing dresses that three-dimensional sinuous substrate integration wave-guide near field focus scans leaky wave slot array antenna in embodiment
With pedestal figure.
Figure 10 is the scan characteristic simulation result diagram of embodiment near field focus scanning antenna.
Figure 11 is the emulation of embodiment S parameter and test result figure.
Figure 12 is scanning analogous diagram of the faces the embodiment E normalization field strength distribution in different frequency.
Figure 13 is sweep test figure of the faces the embodiment E normalization field strength distribution in different frequency.
Wherein, 1 is upper metal copper clad layers, and 2 be medium substrate layer, and 3 be lower metal copper clad layers, and 4 be radiating slot, and 5 be gold
Categoryization through-hole, 6 be medium substrate layer through-hole, and 71 and 72 be respectively the T shape feed structures that microstrip line is transitioned into substrate integration wave-guide
Input terminal and output end, 8 for wriggle base threaded hole.
Specific implementation mode
Illustrate that embodiments of the present invention, those skilled in the art can be by this specification below by way of specific specific example
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.
There is provided the sinuous substrate integration wave-guide near field focus of a three-dimensional a wide range of contour scanning leaky wave gap in the present embodiment
Array antenna.Slot antenna is that one or several gaps are outputed in waveguide or cavity resonator to radiate or receive the day of electromagnetic wave
Line.
A kind of three-dimensional sinuous substrate integration wave-guide near field focus scanning leaky wave slot array antenna, the global shape of antenna is light
Sliding curved surface, the curved surface are connected smoothly by least two cambered surface, and the both ends of antenna are and smooth surface phase
The planar-fed structure cut；The antenna includes between upper and lower two metal copper clad layers 1 and 3 and two metal copper clad layers
Medium substrate layer 2；Upper metal copper clad layers 1 are equipped with the radiating slot 4 for extending vertically through metal copper clad layers, the radiating slot 4
It is staggered at left and right sides of heart line in antennas；Medium substrate layer 2 is equipped with plated-through hole 5, and plated-through hole is about antenna
Center line both sides symmetry arrangement, to form substrate integrated wave guide structure.
Fig. 1 gives the schematic diagram that planar near-field focuses Shape design principle, shown in bore phase change such as formula (1),
For the hyperbola of square-power change, wherein z0For near field focus focal spot height.Its radiating slot is distributed as shown in figure 4, for flat
Face leaky-wave antenna, it can be seen that gap spacing becomes larger from right to left, and wherein spacing majority in the left side is more than between a wavelength
Away from cannot be satisfied the scanning demand of near field focus, excessive gap spacing can cause graing lobe and stray radiation.
Based on the sinuous substrate integration wave-guide of three-dimensional, the sinuous substrate integration wave-guide leaky wave slot array antenna knot of the three-dimensional of proposition
Structure can make full use of longitudinal dimension to realize the bore phase needed near field focus by the serpentine shape of rational design antenna
Distribution, to solve the problems, such as that conventional planar leaky-wave antenna cannot achieve a wide range of contour scanning.The sinuous substrate of three-dimensional integrates wave
The design principle of near field focus antenna is led as shown in Fig. 2, the antenna utilizes longitudinal altimetric compensation near field focus antenna needs
Bore phase is distributed so as to adjust gap position, avoids the occurrence of excessive gap spacing, by rationally designing slot array antenna
Serpentine shape can break through the limitation of the excessive cell spacing of planar near-field antenna.Furthermore it is possible to be changed by antenna serpentine shape
The phenomenon that kind antenna effective aperture efficiency reduces in scanning process, and then aperture efficiency is inhibited to reduce what the focus brought reduced
Phenomenon.By rationally designing the serpentine shape of antenna, the influence of antenna scanning focusing point height can be eliminated, to realize big model
Enclose contour scan characteristic.
As shown in Figure 3, it is assumed that the curved surface between the abscissa and i+1 radiating slot of i-th of radiating slot is flat in xoz
Drop shadow curve's functional equation on face is function fi(x), i.e. formula (2), between i-th of radiating slot and i+1 radiating slot
Arc length apart from spacing be Δ Li, near field focus focal spot height is z0, xiAnd riThe abscissa of respectively i-th radiating slot,
The distance between i radiating slot and near field focus point (i >=1)；, z=fi(x) it is i-th of radiating slot and i+1 gap
Between drop shadow curve functional equation of the curved surface in xoz planes, while fi(x) and fi+1(x) it needs in xi+1Place's intersection, and
The two is in xi+1The derivative at place is equal；ΔLiFor the arc length distance between two gaps, obtained by the arc-length integration to curvilinear equation
It arrives；z0Indicate the height of near field focus point, fi(xi) be i-th of radiating slot ordinate；K and β is respectively that free space neutralizes
Electromagnetic wave propagation constant in substrate integration wave-guide.
According to the phase requirements of near field focus, arbitrary neighborhood gap should meet formula (3).And by geometrical relationship it is found that ri
And xiFormula (4) should be met.ΔLiIt is function fi(x) from xiTo xi+1Arc-length integration, such as shown in (5).The serpentine shape of antenna
Function fi(x) and gap separation delta LiIt is the important parameter that antenna needs synthesis, the cross-section function of the smooth surface of antenna entirety is
fi(x) it combines, wherein fi(x) and fi+1(x) it needs in xi+1Place's intersection, and the two is in xi+1The derivative at place is equal, such as formula (6) and
(7) shown in.It is integrated by the iteration of equation group (3)-(7), the serpentine shape and spoke of the antenna entirety that can be met the requirements
Penetrate gap distributing position.It integrates restrictive condition：Ensure that flexible metal in flexible range and ensures gap spacing not
It can be excessive.
Z=fi(x) (2)
k(ri+1-ri)=β Δs Li+π (3)
fi(xi+1)=fi+1(xi+1) (6)
fi′(xi+1)=fi+1′(xi+1) (7)
In order to simplify design difficulty, consistent f is selected as possible in the present embodimenti(x) function designs serpentine shape.Finally
The three-dimensional serpentine shape of substrate integration wave-guide four arcs and end flat structure as shown in figure 5, be made of, including two
Section radius is r1And r2Circular arc of the center of circle on the upside of antenna, two sections of radiuses are r3And r4Circular arc and two of the center of circle on the downside of antenna
Transverse plane structure.The radius r of the serpentine shape first segment circular arc1For 150mm, the radius r of second segment circular arc2For 180mm,
The radius r of three sections of circular arcs3For 280mm, the radius r of four arcs4For 300mm.First segment and the second segment circular arc center of circle are in antenna
Upside, on the downside of antenna, four end circular arcs have identical tangent plane in junction for third section and the four arcs center of circle, ensure entire
The smooth property of antenna curved surface.Its overall structure is as shown in Fig. 5,6,7, including the lower metal copper clad layers that stack gradually from the bottom up
3, medium substrate layer 2 and upper metal copper clad layers 1, upper metal copper clad layers 1 are equipped with the radiating slot for extending vertically through metal copper clad layers
Gap 4, the heart line left and right sides is staggered in antennas for the radiating slot 4.The radiating slot 4 includes 24, the gap
Length, equivalent width, distance center linear distance determines its radiation intensity.It is integrated that gap position meets the substrate that wriggles on Fig. 4
Position distribution in the case of waveguide.Dielectric layer is equipped with plated-through hole 5, and plated-through hole is symmetrical about antenna centerline both sides
Arrangement, to form substrate integrated wave guide structure.The planar structure 71 and 72 is the T shapes that microstrip line is transitioned into substrate integration wave-guide
The input terminal and output end of feed structure.
In order to realize three-dimensional sinuous substrate integration wave-guide leaky wave slot array antenna structure, first by the sinuous Antenna Design of three-dimensional
Model is scaled planar structure and is processed, then by 3D printing technique print wriggle pedestal, wriggle pedestal top-surface camber with
The smooth surface shape of the sinuous antenna of three-dimensional is consistent.Plane machining antenna is fitted closely with the pedestal that wriggles can realize three-dimensional
Sinuous substrate integration wave-guide antenna.Fig. 7 and Fig. 8 is that three-dimensional sinuous substrate integration wave-guide near field focus scans leaky wave lap gating system day
Line plane machining schematic diagram, wherein Fig. 8 are the enlarged drawing in box in Fig. 7.Structure 6 is two rows of medium substrate layer through-holes, is used for
Antenna is fixed on the base.The through-hole 6 should wriggle the position consistency of base threaded hole 8 with Fig. 9, and the two is close by screw
Connection.
The center operating frequency 35GHz of the present embodiment；In view of conformal design, the substrate of selection is Tly-5, and thickness is
0.245mm, metal select expanded copper, thickness 0.0175mm.It first, can each gap position by near field focus design method
It sets, as shown in Figure 4.In addition, gap needs resonance in centre frequency, the width and length in gap may thereby determine that；Single seam
The amount of radiation of gap is mainly with the offset in gap correlation, in order to realize near field focus characteristic, it is desirable that array or so amount of radiation is basic
Unanimously, so as to obtaining the offset in gap.The length in 24 gaps, width are respectively：3.2mm, 0.2mm, 12, the left side
The offset in gap is 0.2mm and the offset in 12 gaps in the right is 0.1mm, and the position in each gap is given in Fig. 4.Figure 10
For the simulation result of scan characteristic, it can be seen that the embodiment realizes scanning property well in the range of 33GHz-39GHz
Energy.Figure 11 is that emulation and the S parameter tested frequency sweep comparing result figure, it can be seen from the figure that the antenna is in scanning range
Echo coefficient is fine, and tests very high with the consistency of simulation result.Figure 12 and Figure 13 is that emulation and the near field faces E tested are returned
One changes field strength pattern, and as can be seen from the figure the antenna has good scan performance, and the goodness of fit of the two is very high.
The above description is merely a specific embodiment, any feature disclosed in this specification, except non-specifically
Narration, can be replaced by other alternative features that are equivalent or have similar purpose；Disclosed all features or all sides
Method or in the process the step of, other than mutually exclusive feature and/or step, can be combined in any way.
Claims (6)
1. a kind of three-dimensional sinuous substrate integration wave-guide near field focus scans leaky wave slot array antenna, it is characterised in that：Antenna it is whole
Shape is smooth surface, and the curved surface is connected smoothly by least two cambered surface, the both ends of antenna be with
The tangent planar-fed structure of smooth surface；The antenna includes upper and lower two metal copper clad layers and two metal copper clad layers
Between medium substrate layer；Upper metal copper clad layers are equipped with the radiating slot (4) for extending vertically through metal copper clad layers, the radiation
The heart line left and right sides is staggered in antennas in gap (4)；Medium substrate layer be equipped with plated-through hole, plated-through hole about
Antenna centerline both sides symmetry arrangement, to form substrate integrated wave guide structure.
2. three-dimensional sinuous substrate integration wave-guide near field focus according to claim 1 scans leaky wave slot array antenna, special
Sign is：Arc length distance, delta L between i-th of radiating slot and i+1 radiating slotiBetween two radiating slots
Drop shadow curve functional equation z=f of the curved surface in xoz planesi(x) equation group should be met：
Wherein xiAnd riThe distance between the abscissa of respectively i-th radiating slot, i-th of radiating slot and near field focus point
(i≥1)；Z=fi(x) drop shadow curve letter of the curved surface between i-th of radiating slot and i+1 gap in xoz planes
Number equation, while fi(x) and fi+1(x) it needs in xi+1Place's intersection, and the two is in xi+1The derivative at place is equal；ΔLiIt is stitched for two
Arc length distance between gap, is obtained by the arc-length integration to curvilinear equation；z0Indicate the height of near field focus point, fi(xi) be
The ordinate of i-th of radiating slot；K and β be respectively in free space and substrate integration wave-guide in electromagnetic wave propagation constant.
3. three-dimensional sinuous substrate integration wave-guide near field focus according to claim 1 scans leaky wave slot array antenna, special
Sign is：Two metal copper clad layers and medium substrate layer are processed to obtain by plane PCB technology, and then fitting is fixed on three-dimensional and wriggles
To form three-dimensional sinuous chip integrated waveguide slot array antenna on the carrier of Yan, three-dimensional sinuous carrier and the smooth surface
Shape is consistent.
4. three-dimensional sinuous substrate integration wave-guide near field focus according to claim 1 scans leaky wave slot array antenna, special
Sign is：Radiating slot (4) has 24, and width, length are consistent.
5. three-dimensional sinuous substrate integration wave-guide near field focus according to claim 1 scans leaky wave slot array antenna, special
Sign is：Feed structure is the T-shaped structure that microstrip line is transitioned into substrate integration wave-guide.
6. three-dimensional sinuous substrate integration wave-guide near field focus according to claim 3 scans leaky wave slot array antenna, special
Sign is：The sinuous carrier of three-dimensional is obtained by the method for 3D printing.
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| US16/386,296 US10985470B2 (en) | 2018-04-23 | 2019-04-17 | Curved near-field-focused slot array antennas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111916912A (en) * | 2020-06-30 | 2020-11-10 | 电子科技大学 | Low-profile three-dimensional distributed conformal large-range scanning array antenna |
| CN112823286A (en) * | 2018-10-12 | 2021-05-18 | 奥比斯系统有限公司 | Device and method for testing 4.5G or 5G base station |
| CN113013614A (en) * | 2021-01-29 | 2021-06-22 | 北京交通大学 | Antenna assembly loaded by leaky-wave antenna and power divider with bidirectional beam forming |
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| CN113013614B (en) * | 2021-01-29 | 2022-05-06 | 北京交通大学 | Loaded antenna assembly of ware is divided to merit of two-way beam forming |
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