CN107732440A - Super-wide band high-gain wave beam is faced upward omnidirectional antenna - Google Patents
Super-wide band high-gain wave beam is faced upward omnidirectional antenna Download PDFInfo
- Publication number
- CN107732440A CN107732440A CN201710807431.2A CN201710807431A CN107732440A CN 107732440 A CN107732440 A CN 107732440A CN 201710807431 A CN201710807431 A CN 201710807431A CN 107732440 A CN107732440 A CN 107732440A
- Authority
- CN
- China
- Prior art keywords
- submatrix
- broadband
- wave beam
- oscillator
- cable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000758 substrate Substances 0.000 claims abstract description 20
- 230000024241 parasitism Effects 0.000 claims description 24
- 230000001131 transforming effect Effects 0.000 claims description 22
- 239000004020 conductor Substances 0.000 claims description 5
- 230000003071 parasitic effect Effects 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 description 13
- 238000013461 design Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000011152 fibreglass Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000001465 metallisation Methods 0.000 description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- RZVHIXYEVGDQDX-UHFFFAOYSA-N 9,10-anthraquinone Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3C(=O)C2=C1 RZVHIXYEVGDQDX-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007430 reference method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
- H01Q9/285—Planar dipole
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Super-wide band high-gain wave beam of the present invention omnidirectional antenna of facing upward includes co-axial alignment the first broadband submatrix and the second broadband submatrix on same medium substrate, the array number of two submatrixs is unequal, minimum array number is 1, its array element is U-shaped symmetrical dipole, feed wire is additionally provided with the medium substrate, the first broadband submatrix connects feed cable with the oscillator of the second broadband submatrix by feed wire, and the characteristic impedance for connecting two sections of feed cables of the first broadband submatrix and the second broadband submatrix respectively is respectively Z01And Z02, the input impedance Z of the first broadband submatrix and the second broadband submatrixin1、Zin2The respectively equal to characteristic impedance of its feed cable, i.e.,：Z01=Zin1, Z02=Zin2.Face upward omnidirectional antenna ultra wide band, high-gain, horizontal omnidirectional, wave beam of super-wide band high-gain wave beam of the present invention is faced upward, is high-power, be high efficiency, light small portable, structurally simple, economical durable.
Description
【Technical field】
The present invention relates to a kind of omnidirectional antenna equipment and technology, more particularly to a kind of suitable UAV ground control station
Miniature ultra wide band high-gain wave beam face upward omnidirectional antenna and its technology.
【Background technology】
With the development of aircraft industry and information technology, the mankind enter the unmanned plane epoch.Unmanned plane is suitably executed all kinds of
Task, and the advantage with high performance-price ratio, all have broad application prospects in Military and civil fields.Military aspect, unmanned plane are used for
Ground mapping, intelligence reconnaissance, battlefield surveillance, to enemy's attack, trunking traffic etc.；Civilian aspect, unmanned plane be used for Aerial photography,
Logistics express delivery and scientific exploration etc..At present, China is in world lead level in unmanned plane field.Generally, unmanned plane relies on
Earth station's wireless remotecontrol mode performs each generic task.This Radio Link between earth station and unmanned plane antenna by establishing.Ground
Face station typically uses high-gain parabola antenna, and unmanned plane then uses low gain omnidirectional antenna.The former frequency is high, directionality
By force, wave beam is narrow, command range is remote, but can not have barrier to block on propagation path, and is influenceed by earth curvature, can only
Line-of-sight propagation.Therefore, unmanned plane during flying is highly desirable as high as possible and it is necessary in main lobe wave beam, and can not control simultaneously
Multi rack is located at the unmanned plane of different azimuth.In addition, parabola antenna needs orientation/pitching face mechanism free to rotate, body
Product is big, cost is higher.By contrast, if control station uses low frequency high-gain omni-directional antenna, can solve above-mentioned ask well
Topic.However, high-gain omni-directional antenna generally use half-wave dipole coaxial group of battle array is realized, its greatest irradiation direction is pointed to horizontal
Direction.This cause and unmanned plane good close to horizontal low elevation angle region control effect, and the area of space at the high elevation angle controls
Poor effect, cause its movable spatial domain greatly limited.Therefore, the main lobe of omnidirectional antenna needs certain angle of facing upward, and on
Zero point between secondary lobe is filled, and could meet the needs of the wide spatial domain flight control of unmanned plane.Generally, wave beam forming uses
Array weight mode is realized, but needs the feeding network of complex designing, causes antenna gain to decline, size increases, portability becomes
Difference, cost increase etc..Gain declines, and command range can be caused to become the problems such as near, the unmanned plane hang time shortens；Size increases
Greatly, cause Flexible deployment inconvenience, wind load too high.Another scheme is, is feedback using series feed layered transducer elements, the advantages of the program
Electricity is simple, compact-sized, cost is low, and shortcoming is relatively low gain, narrow bandwidth, downwards bevel beam.As other antennas, bandwidth
It is one of key index of earth station antenna, it determines controllable unmanned plane quantity and the data back speed of unmanned plane
Rate.In addition, in order that Radio Link obtains optimum signal-noise ratio, earth station antenna preferably uses broadband to design, utilizes different wave length
The propagation characteristic of electric wave is to keep the robustness of link.Obviously, the scheme of the coaxial array of conventional oscillator is difficult to meet above-mentioned
The requirement of broadband, multiband, and the method for finding spread bandwidth that must look for another way.
【The content of the invention】
It is an object of the invention to provide a kind of ultra wide band, high-gain, horizontal omnidirectional, wave beam face upward, be high-power, efficient
Rate, light small portable, structurally simple, economical durable super-wide band high-gain wave beam are faced upward omnidirectional antenna.
To realize the object of the invention, there is provided following technical scheme：
The present invention provides a kind of super-wide band high-gain wave beam and faced upward omnidirectional antenna, and it includes co-axial alignment in same medium
The array number of the first broadband submatrix and the second broadband submatrix on substrate, first broadband submatrix and the second broadband submatrix is not
It is equal, and minimum array number is 1, its array element is U-shaped symmetrical dipole, and feed wire is additionally provided with the medium substrate, connects institute
Each oscillator of the first broadband submatrix and the second broadband submatrix is stated, the first broadband submatrix and the second broadband submatrix are led by feed
Line connects feed cable, connects the characteristic resistance of two sections of feed cables of the first broadband submatrix and the second broadband submatrix respectively
Anti- is respectively Z01And Z02, the input impedance Z of the first broadband submatrix and the second broadband submatrixin1、Zin2Respectively equal to it feeds
The characteristic impedance of cable, i.e.,：Z01=Zin1, Z02=Zin2。
Above-mentioned first broadband submatrix and the second broadband submatrix, the array number of two submatrixs is unequal, can be respectively 1 He
2nd, 2 and 3,3 and 4,2 and 5,5 and 3,4 and 2, n and m, etc. numeral combination, wherein n, m is unequal natural number, foregoing group
The section Example that example is embodiment of the present invention is closed, is not intended as interest field limitation of the present invention, first broadband
The array number of submatrix and the second broadband submatrix can be any number, as long as the battle array of the first broadband submatrix and the second broadband submatrix
First number is unequal.
Preferably, it is Z to connect one section of characteristic impedance respectively in the end of two sections of feed cables03、Z04A quarter
Wavelength cable transforming section, two sections of cable transforming sections connect joint current, feed cable characteristic impedance Z01And Z02, length L01And L02It is full
It is enough lower mathematical expression relation：
L01=(2 π λ1)×(5γ)×sin(πθ/180)+(λ1/λ2)L02
In relational expression, λ1、λ1Respectively characteristic impedance is Z01And Z02Feed cable in guide wavelength, γ is array element
The electrical length coefficient of spacing, i.e. array element spacing are γ λ0, λ0For vacuum medium wavelength, θ is wave beam tilt angle, i.e., beam main lobe with
The angle of horizontal direction.
Preferably, two sections of cable transforming sections feed groove by three holes and connected, and three hole feeds the 3rd hole of groove
Then connect joint current, joint current other end connection radio-frequency joint.Preferably, two cable transforming sections extend towards array centre position,
In the feed groove connection of three holes of place's one-to-two close to each other.Preferably, the joint current characteristic impedance Z0=50 Ω.
Preferably, longitudinal L-shaped groove, the oscillator center two of the first broadband submatrix are opened in the oscillator arms end of the first broadband submatrix
A pair of first submatrix parasitism minor matters of side asymmetrical load, a pair second sons of oscillator center both sides asymmetrical load of the second broadband submatrix
The parasitic minor matters of battle array.
The array element of two ultra wide band PCB printing oscillator submatrixs is U-shaped symmetrical dipole, and underarm is located at medium base respectively thereon
The positive and negative of plate, positioned at positive U-shaped arm towards substrate one end, the U shapes arm positioned at reverse side then towards the substrate other end, or
It is just opposite.
Preferably, the oscillator both arms total length of the first broadband submatrix and the second broadband submatrix is (0.3~0.5) λC,
Wherein λCCentered on wavelength.The length range is preferred embodiment, but is not limited merely to the concrete numerical value, in this numerical value model
Enclose and all fallen in the scope of protection of the present invention close to approximate number or equal conversion span.
Preferably, the first submatrix parasitism minor matters arrange along oscillator arms, and gap are left between oscillator arms, and this
The center of one submatrix parasitism minor matters projects among oscillator the gap location until between oscillator two-arm, the submatrix of both sides first inwardly
Do not contacted between parasitic minor matters.Preferably, the bottom of the oscillator arms of the first broadband submatrix is provided with convex in the side towards end
Rise.
Preferably, two-arm in middle location overlap, but does not electrically connect the oscillator of the second broadband submatrix up and down, and this
Two submatrix parasitism minor matters are arranged along oscillator arms, and gap is left between oscillator arms, the central court of the second submatrix parasitism minor matters
Interior protrusion, oscillator arms profile is bonded, but do not extended among oscillator.
Preferably, the feed cable, cable transforming section, joint current, along center of antenna axis direction cabling, and
And each cable and feed wire side multi-point welding.Preferably, the feed cable, cable transforming section, joint current are coaxial
Cable.
Preferably, the feed wire is parallel two-conductor feeder line, is overlapped along array direction and with array axis, by more
The wide transforming section cascade of section Length discrepancy forms；Center is distributing point, and both ends are short dot, and distributing point is non-metallic mistake
Hole and on divide into pad, short dot is then metallization VIA, and upper and lower feeder line is connected.
Preferably, it is T omnidirectional antenna to be pressed down on the super-wide band high-gain wave beam including a wall thicknessR, length LRGlass
Steel antenna house, each part of antenna is fully wrapped around, antenna house bottom end opening, top closure, and setting coaxial with antenna.
Preferably, antenna house is using the common vehicle material processing such as fiberglass, PTFE, PVC, PC, PE, ABS.
Preferably, the length of the medium substrate is generous is respectively：LV、WV、TV, dielectric constant εr1, loss angle tangent tan
δ1.Preferably, antenna medium substrates are to form double-sided copper-clad as Raw material processing using PTFE, hydrocarbon, alumina species
Plate, such as Rogers, Taconic, Arlon, Neltec, the prosperous serial sheet material of spirit.
Preferably, actual feed cable band SMA, BNC, TNC, N heads, 7/16 or the common connector such as 4.3/10DIN.
Prior art is contrasted, the present invention has advantages below：
The comprehensive various prior arts of the present invention, it is proposed that a kind of super-wide band high-gain wave beam is faced upward omnidirectional antenna.First,
Two independent ultra wide band PCB submatrixs are designed, i.e., array are divided into two single PCB submatrixs, then will with cable or work(scoreboard
Two submatrixs form high-gain compound matrices.By adjusting the impedance of two submatrixs, and characteristic impedance is matched for it and is equal to each self-impedance
Feed cable so that array input impedance is 50 Ω.Because feed cable impedance is equal to the impedance of submatrix, cable length is adjusted
The tilt angle of array beamses can be changed, not influence its impedance operator but.By above measure, antenna UHF 560~
680MHz frequency ranges (BW=120MHz, 19.35%), nearly 3.127 λCIn electrical length, 50 Ω matched wells (VSWR are realized<
1.77, minimum is 1.02)；Reaching 5.92~7.30dBi, wave beam is faced upward about 5 °, and vertical plane (E faces) ripple is wide 14.35 °~and 16.12 °,
Horizontal plane (H faces) out-of-roundness is less than 0.68dB, and upper secondary lobe first zero level is more than -22.5dB；It enormously simplify feeding network
Design, adds bandwidth, reduces loss, improve efficiency (>=93.5%).In addition, the design it is short and small it is portable, bear power
Greatly, structural strength height, economy and durability, it is the preferred antenna design for being adapted to UAV ground control station.In addition, this method also has
There is the features such as thinking novelty, clear principle, pervasive, simple and easy method, for broader bandwidth, more high-gain, wave beam forming
Omnidirectional antenna optimization design and improvement are also applicable and effective.
【Brief description of the drawings】
Fig. 1 is the schematic diagram that defines of rectangular coordinate system used by antenna model.
Fig. 2 be ultra-wide high-gain with wave beam face upward omnidirectional antenna two unit submatrixs front view.
Fig. 3 be ultra-wide high-gain with wave beam face upward omnidirectional antenna two unit submatrixs center partial enlarged drawing.
Fig. 4 be ultra-wide high-gain with wave beam face upward omnidirectional antenna two unit submatrixs both ends partial enlarged drawing.
Fig. 5 be ultra-wide high-gain with wave beam face upward omnidirectional antenna three unit submatrixs front view.
Fig. 6 be ultra-wide high-gain with wave beam face upward omnidirectional antenna three unit submatrixs center partial enlarged drawing.
Fig. 7 be ultra-wide high-gain with wave beam face upward omnidirectional antenna three unit submatrixs both ends partial enlarged drawing.
Fig. 8 be ultra-wide high-gain with wave beam face upward omnidirectional antenna the coaxial complete model of submatrix up and down front view.
Fig. 9 is that ultra-wide high-gain is faced upward the coaxial feed network diagram of omnidirectional antenna with wave beam.
Figure 10 is that ultra-wide high-gain is faced upward the S parameter curve of omnidirectional antenna with wave beam.
Figure 11 is that ultra-wide high-gain is faced upward the standing-wave ratio VSWR of omnidirectional antenna with wave beam.
Figure 12 is that ultra-wide high-gain band wave beam faces upward omnidirectional antenna in fL=560MHz 2D directional diagrams.
Figure 13 is that ultra-wide high-gain band wave beam faces upward omnidirectional antenna in fC=620MHz 2D directional diagrams.
Figure 14 is that ultra-wide high-gain band wave beam faces upward omnidirectional antenna in fH=680MHz 2D directional diagrams.
Figure 15 is that ultra-wide high-gain is faced upward the real gain G of omnidirectional antenna with wave beamRWith frequency f change curves.
Figure 16 be ultra-wide high-gain with wave beam face upward omnidirectional antenna E faces half-power beam width HPBW with frequency f change
Curve.
Figure 17 be ultra-wide high-gain with wave beam face upward omnidirectional antenna E faces wave beam vertical angle with frequency f change curves.
Figure 18 ultra-wide high-gain with wave beam face upward omnidirectional antenna H faces out-of-roundness with frequency f change curves.
The wide high-gains of Figure 19 are faced upward the efficiency eta of omnidirectional antenna with wave beamAWith frequency f change curves.
This paper accompanying drawings are for being expanded on further and understand to the present invention, and a part for constitution instruction, with this
The specific embodiment of invention is used to explain the present invention together, but is not construed as limiting the invention or limits.The present invention may be used also
To have other various variants, and multiple other application scenarios and field.
【Embodiment】
Here, ultra wide band, high-gain, omni-directional, wave beam is will focus on to face upward with four main features of figuration to discuss this
Invention, and provide respective drawings the present invention is described in detail.It is it should be strongly noted that as described herein preferred real
Apply example to be merely to illustrate and explain the present invention, be not limited to or limit the present invention.Provide the present invention's below in conjunction with the accompanying drawings
Preferred embodiment, to describe technical scheme in detail.
It is contemplated that for UAV ground control station design a kind of ultra wide band (BW >=20%), high-gain (G >=
6dBi), horizontal omnidirectional, wave beam are faced upward, are upper null-fill, high-power, high efficiency, light small portable, structurally simple, economical durable
Vertical polarized antenna, and provide effective reference method for more high-gain, broader bandwidth, the optimization design of wave beam forming.Tool
Ultra-wide high-gain of the present invention band wave beam is constructed in body embodiment by following steps to face upward omnidirectional antenna.
Step 1, rectangular coordinate system in space is established, see Fig. 1；
Step 2, construct the first broadband submatrix 10.In the present embodiment, the first broadband submatrix 10 is binary cummerbund
Battle array, in coordinate system XOZ planes, one two unit broadband oscillator array placed along Z-direction of construction, each oscillator includes
Two symmetrical U-shaped both arms 101,102, total length are about (0.3~0.5) λC(λCCentered on wavelength)；Open oscillator arms end
Longitudinal L-shaped groove 103, a pair of first submatrix parasitism minor matters 104 of oscillator center both sides asymmetrical load, the first submatrix parasitism minor matters 104
Arranged along oscillator arms, and gap 105 is left between oscillator arms, the center of the first submatrix parasitism minor matters 104 is dashed forward inwardly
Go out to oscillator centre the gap location until between oscillator two-arm, do not contact between both sides the first submatrix parasitism minor matters 104, such as scheme
In shown in 114 parts；The bottom of oscillator arms is provided with projection 113 in the side towards end；The oscillator of first broadband submatrix 10 with
Feeder line integration is printed on the two sides of double side dielectric substrate 100, and the length of medium substrate 100 is generous to be respectively：LV、WV、TV, dielectric
Constant is εr1, losstangenttanδ1；Each oscillator upper arm of first broadband submatrix 10 pcb board front, underarm in reverse side, or
Person's contrast；Feeder line is parallel two-conductor feeder line, is overlapped along array direction and with array axis, wide by more piece Length discrepancy
Transforming section 106,107,108,109,110 cascade form；Center is distributing point 111, and both ends are short dot 112, feed
Point 111 be non-metallic via and on divide into pad, short dot 112 is then metallization VIA, and upper and lower feeder line is connected, and sees Fig. 2
~4；
Step 3, construct the second broadband submatrix 20.In the present embodiment, second broadband submatrix 10 is ternary broadband
Submatrix, in XOZ planes, the other end of the medium substrate 100 of the first broadband submatrix 10, it is wide that another is constructed according to the method described above
Band layered transducer elements, its center axis overlap with the first broadband submatrix 10；The two-arm of second broadband submatrix 20 is similarly U-shaped oscillator
Arm 201,202, unlike the first broadband submatrix 10, the U-shaped oscillator arms end of the second broadband submatrix 20 does not have a L-shaped groove, and two
It is very close to each other between arm, it is, two-arm in middle location overlap, but is not electrically connected the oscillator of the second broadband submatrix 20 up and down
Connect；A pair of second submatrix parasitism minor matters 203 of oscillator center both sides asymmetrical load, the second submatrix parasitism minor matters 203 are along oscillator arms
Arrangement, and gap 204 is left between oscillator arms, the center of the second submatrix parasitism minor matters 203 protrudes inwardly, suits oscillator arms
Profile, but do not extend among oscillator；The oscillator of second broadband submatrix 20 is integrated with feeder line to be printed on double side dielectric substrate
100 two sides, each oscillator upper arm is in pcb board front, underarm in reverse side, or contrast；Feeder line is presented for parallel two-conductor
Line, overlapped along array direction and with array axis, by the wide cascade of transforming section 205,206,207,208 of more piece Length discrepancy
Into；Center is distributing point 210, and both ends are short dot 209, distributing point 210 be non-metallic via and on divide into pad,
Short dot 209 is then metallization VIA, and upper and lower feeder line is connected, sees Fig. 5~7；
Step 4, coaxial feed network is set.It is respectively with characteristic impedance and length：Z01、L01And Z02、 L02Feed electricity
Cable 410,420, the first broadband submatrix 10 and the second broadband submatrix 20 are connected respectively；Second broadband submatrix 20 and the first cummerbund
The input impedance Z of battle array 10in1、Zin2The respectively equal to characteristic impedance of its feed cable, i.e.,：Z01=Zin1, Z02=Zin2；Cable Z01
And Z02Length L01And L02Meet following mathematical relationship：
L01=(2 π λ1)×(5γ)×sin(πθ/180)+(λ1/λ2)L02――(1)
(1) in formula, λ1、λ1Respectively feed cable Z01And Z02In guide wavelength；γ is the electrical length system of array element spacing
Number, i.e., array element spacing is γ λ0, λ0For vacuum medium wavelength；θ is the folder of wave beam tilt angle, i.e. beam main lobe and horizontal direction
Angle, unit are ° (degree).Then, it is Z in characteristic impedance01And Z02The end of feed cable connect one section of characteristic impedance respectively and be
Z03、Z04Quarter-wave cable transforming section 411,421；Then, groove is fed by two cable transforming sections with three holes
411st, 421 connect, it is Z that the 3rd hole of three hole feed groove, which then connects a root characteristics impedance,0=50 Ω joint current 430,
The other end connection radio-frequency joint of joint current 430, is shown in Fig. 9；
Step 5, the optimization of feed cable cabling.By five feed cables 410~411,420~421 and of step 4
430, all along center of antenna axis direction cabling.Except two submatrixs feed cable both ends connect two submatrix distributing points 111,
Outside 210 pad, remainder and other each cables take the air line.It is also, each cable and submatrix center feed side is more
Spot welding, to fix cable and to optimize wiring, is shown in Fig. 9；
Step 6, antenna house 300 is set.It is T to set a wall thicknessR, length LRFiberglass radome 300, by day
Each part of line is fully wrapped around, antenna house bottom end opening, top closure, and with antenna co-axial alignment.
The super-wide band high-gain wave beam built by above-mentioned steps is faced upward omnidirectional antenna, and it includes co-axial alignment in medium
The first broadband submatrix 10 and the second broadband submatrix 20 on substrate, array element is U-shaped symmetrical dipole, is also set on the medium substrate
There is feed wire, connect each oscillator of first broadband submatrix 10 and the second broadband submatrix 20, the He of the first broadband submatrix 10
Second broadband submatrix 20 connects feed cable by feed wire, is Z in the characteristic impedance01And Z02Feed cable end
It is Z that end connects one section of characteristic impedance respectively03、Z04Quarter-wave cable transforming section 411,421, two sections of cable transforming sections
Connect the input impedance Z of joint current, the second broadband submatrix 20 and the first broadband submatrix 10in1、Zin2Respectively equal to it feeds
The characteristic impedance of feed cable, i.e.,：Z01=Zin1, Z02=Zin2。
Characteristic impedance and the length difference of the feed cable of the first broadband submatrix 10 and the second broadband submatrix 20 are connected respectively
For：Z01、L01And Z02、L02, feed cable characteristic impedance Z01And Z02, length L01And L02Meet following mathematical expression relation：
L01=(2 π λ1)×(5γ)×sin(πθ/180)+(λ1/λ2)L02
In relational expression, λ1、λ1Respectively characteristic impedance is Z01And Z02Feed cable in guide wavelength, γ is array element
The electrical length coefficient of spacing, i.e. array element spacing are γ λ0, λ0For vacuum medium wavelength, θ is wave beam tilt angle, i.e., beam main lobe with
The angle of horizontal direction.
Two sections of cable transforming sections extend towards array centre position, and in three holes of place's one-to-two close to each other, feed groove connects
Pick up and, the 3rd hole then connection performance impedance Z of three hole feed groove0=50 Ω joint current 430, the other end of joint current 430
Connect radio-frequency joint.Actual feed cable band SMA, BNC, TNC, N head, 7/16 or the common connector such as 4.3/10DIN.
The array element of the first broadband submatrix 10 and the second broadband submatrix 20 is U-shaped symmetrical dipole, thereon underarm difference position
In the positive and negative of medium substrate, positioned at positive U-shaped arm towards substrate one end, the U-shaped arm positioned at reverse side is then another towards substrate
End, or it is just opposite.Oscillator both arms 101,102 total lengths of the first broadband submatrix 10 and the second broadband submatrix 20 are
(0.3~0.5) λC, wherein λCCentered on wavelength.The length range is preferred embodiment, but is not limited merely to the specific number
Value, all fallen in the scope of protection of the present invention in this number range close to approximate number or equal conversion span.
Open longitudinal L-shaped groove 103, the oscillator center of the first broadband submatrix 10 in the oscillator arms end of the first broadband submatrix 10
A pair of binary submatrix parasitism minor matters 104 of both sides asymmetrical load, a pair of the oscillator center both sides asymmetrical load of the second broadband submatrix 20
Second submatrix parasitism minor matters 203.The binary submatrix parasitism minor matters 104 arrange along oscillator arms, and between being left between oscillator arms
Gap 105, the center of the binary submatrix parasitism minor matters 104 project among oscillator the gap location until between oscillator two-arm inwardly,
Do not contacted between both sides binary submatrix parasitism minor matters 104.The bottom of the oscillator arms of the first broadband submatrix 10 is towards end
Side is provided with projection 113.
Two-arm is in middle location overlap above and below the oscillator of the second broadband submatrix 20, but does not electrically connect, second submatrix
Parasitic minor matters 203 are arranged along oscillator arms, and gap 204 is left between oscillator arms, in the second submatrix parasitism minor matters 203
Centre protrudes inwardly, is bonded oscillator arms profile, but do not extend among oscillator.
The feed cable, cable transforming section, joint current, along center of antenna axis direction cabling, also, each cable
With feed wire side multi-point welding.Preferably, the feed cable, cable transforming section, joint current are coaxial cable.
The feed wire is parallel two-conductor feeder line, is overlapped along array direction and with array axis, by more piece Length discrepancy
The wide cascade of transforming section 106,107,108,109,110 forms；Center is distributing point 111, and both ends are short dot 112, feedback
Electricity point 111 be non-metallic via and on divide into pad, short dot 112 is then metallization VIA, and upper and lower feeder line is connected.
It is T to press down omnidirectional antenna on the super-wide band high-gain wave beam including a wall thicknessR, length LRFiberglass radome
300, each part of antenna is fully wrapped around, antenna house bottom end opening, top closure, and setting coaxial with antenna.It is preferred that
, antenna house is using the common vehicle material processing such as fiberglass, PTFE, PVC, PC, PE, ABS.
The length of the medium substrate 100 is generous to be respectively：LV、WV、TV, dielectric constant εr1, losstangenttanδ1.It is excellent
Choosing, antenna medium substrates are to form double face copper as Raw material processing using PTFE, hydrocarbon, alumina species, such as
Rogers, Taconic, Arlon, Neltec, the prosperous serial sheet material of spirit.
The embodiment of the present invention is above are only, is not limited to or limits the present invention.First broadband submatrix 10 and
Two broadband submatrixs 20 are the difference name of the submatrix differed in the embodiment of the present invention to two array numbers, above-mentioned to refer to
The oscillator technical characteristic of two submatrixs can exchange between two submatrixs.
The present invention is in 560~680MHz of UHF frequency ranges (BW=120MHz, 19.35%), nearly 3.127 λCIn electrical length,
Realize 50 Ω matched wells (VSWR<1.77, minimum is 1.02)；Reach 5.92~7.30 dBi, wave beam is faced upward about 5 °, vertical plane
(E faces) ripple is wide 14.35 °~and 16.12 °, horizontal plane (H faces) out-of-roundness is less than 0.68dB, and upper secondary lobe first zero level is more than-
22.5dB；Feeding network design is enormously simplify, bandwidth is added, reduces loss, improve efficiency (>=93.5%).Tool
Body technique parameter refers to Figure 10~19, as described below.
Figure 10 is that ultra-wide high-gain is faced upward the S parameter curve of omnidirectional antenna with wave beam.Wherein, transverse axis (X axles) is frequency f,
Unit is MHz；The longitudinal axis (Y-axis) is S parameter amplitude | Sij|, unit dB；Solid line is reflectance factor | S11|、|S22|, dotted line is
Isolation | S21|, thick line is three unit submatrixs 20, and fine rule is the lower submatrix of Unit two 10.Known by figure, in whole 560~680MHz
Frequency range realizes good impedance matching, bandwidth reach 19.35% (| S11|≤- 11.5dB), isolation is better than -28dB.
Figure 11 is that ultra-wide high-gain is faced upward the standing-wave ratio VSWR of omnidirectional antenna with wave beam.Wherein, transverse axis (X-axis) is frequency
F, unit MHz；The longitudinal axis (Y-axis) is standing-wave ratio VSWR；Thick line is three unit submatrixs 20, and fine rule is two unit submatrixs 10.By scheming
Know, realize good impedance matching in whole 560~680MHz frequency ranges, bandwidth reaches 19.35% (VSWR≤1.77).
Figure 12 is that ultra-wide high-gain band wave beam faces upward omnidirectional antenna in fL=560MHz 2D directional diagrams.Wherein, solid line table
Show H- faces (Theta=90 °, XOY plane), dotted line represents E- faces (Phi=90 °, YOZ planes)；Gain G=5.92dBi, E faces
HPBW=16.12 ° of half-power beam width, H faces out-of-roundness are 0.41dB, and wave beam is faced upward 4.817 °, and the upper secondary lobe first zero is returned
One change level is -22.5dB；
Figure 13 is that ultra-wide high-gain band wave beam faces upward omnidirectional antenna in fC=620MHz 2D directional diagrams.Wherein, solid line table
Show H- faces (Theta=90 °, XOY plane), dotted line represents E- faces (Phi=90 °, YOZ planes)；Gain G=6.85dBi, E faces
HPBW=15.65 ° of half-power beam width, H faces out-of-roundness are 0.54dB, and wave beam is faced upward 4.80 °, and the upper secondary lobe first zero is returned
One change level is -19.7dB；
Figure 14 is that ultra-wide high-gain band wave beam faces upward omnidirectional antenna in fH=680MHz 2D directional diagrams.Wherein, solid line table
Show H- faces (Theta=90 °, XOY plane), dotted line represents E- faces (Phi=90 °, YOZ planes)；Gain G=7.30dBi, E faces
HPBW=14.35 ° of half-power beam width, H faces out-of-roundness are 0.68dB, and wave beam is faced upward 4.782 °, and the upper secondary lobe first zero is returned
One change level is -16.3dB；
Figure 15 is that ultra-wide high-gain is faced upward the real gain G of omnidirectional antenna with wave beamRWith frequency f change curves.Wherein, it is horizontal
Axle (X-axis) is frequency f, unit MHz；The longitudinal axis (Y-axis) is gain GR, unit dBi.In whole frequency band (560~
680MHz), real gain is GR=5.92~7.30dBi, gain loss about 1~1.5dBi caused by wave beam forming.
Figure 16 be ultra-wide high-gain with wave beam face upward omnidirectional antenna E faces half-power beam width HPBW with frequency f change
Curve.Known by figure, in whole frequency band (560~680MHz), E faces half-power beam width scope：HPBW=14.35 °~
16.12°。
Figure 17 be ultra-wide high-gain with wave beam face upward omnidirectional antenna E faces wave beam vertical angle with frequency f change curves.By
Figure is known, in whole frequency band (560~680MHz), wave beam angular region of facing upward in E faces is：4.782 °~4.817 °.
Figure 18 ultra-wide high-gain with wave beam face upward omnidirectional antenna H faces out-of-roundness with frequency f change curves.Known by figure, it is whole
In individual frequency band (560~680MHz), the out-of-roundness of H faces (Theta=90 °) is less than 0.68dBi, and azimuth plane uniformity of radiation is very
It is good.
The wide high-gains of Figure 19 are faced upward the efficiency eta of omnidirectional antenna with wave beamAWith frequency f change curves.Known by figure, in frequency band
Interior (560~680MHz), the efficiency of antenna are more than 93.5%, and efficiency is very high.
The preferred embodiment of the present invention is these are only, is not limited to or limits the present invention.For grinding for this area
Study carefully or technical staff for, the present invention can have various modifications and variations, and multiple other application scenarios and field.It is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements made etc., it should be included in the present invention and stated
Protection domain within.
Claims (10)
- The omnidirectional antenna 1. a kind of super-wide band high-gain wave beam is faced upward, it is characterised in that it includes co-axial alignment in same medium base The array number of the first broadband submatrix and the second broadband submatrix on plate, first broadband submatrix and the second broadband submatrix not phase Deng and minimum array number is 1, and its array element is U-shaped symmetrical dipole, is additionally provided with feed wire on the medium substrate, described in connection Each oscillator of first broadband submatrix and the second broadband submatrix, the first broadband submatrix and the second broadband submatrix are connected by feed wire Feed cable is connect, connects the characteristic impedance difference of two sections of feed cables of the first broadband submatrix and the second broadband submatrix respectively For Z01And Z02, the input impedance Z of the first broadband submatrix and the second broadband submatrixin1、Zin2The respectively equal to spy of its feed cable Property impedance, i.e.,：Z01=Zin1, Z02=Zin2。
- The omnidirectional antenna 2. super-wide band high-gain wave beam as claimed in claim 1 is faced upward, it is characterised in that in described two sections feeds It is Z that the end of cable connects one section of characteristic impedance respectively03、Z04Quarter-wave cable transforming section, two sections of cable transforming sections Connect joint current, feed cable characteristic impedance Z01And Z02, length L01And L02Meet following mathematical expression relation：L01=(2 π λ1)×(5γ)×sin(πθ/180)+(λ1/λ2)L02In relational expression, λ1、λ1Respectively characteristic impedance is Z01And Z02Feed cable in guide wavelength, γ is array element spacing Electrical length coefficient, i.e. array element spacing are γ λ0, λ0For vacuum medium wavelength, θ is wave beam tilt angle, i.e. beam main lobe and level side To angle.
- The omnidirectional antenna 3. super-wide band high-gain wave beam as claimed in claim 2 is faced upward, it is characterised in that two sections of cable transforming sections Groove is fed by three holes to connect, the 3rd hole then connection performance impedance Z of three hole feed groove0=50 Ω joint current, always The cable other end connects radio-frequency joint.
- The omnidirectional antenna 4. the super-wide band high-gain wave beam as described in any one of claims 1 to 3 is faced upward, it is characterised in that described Open longitudinal L-shaped groove, a pair of the oscillator center both sides asymmetrical load of the first broadband submatrix in the oscillator arms end of first broadband submatrix One submatrix parasitism minor matters, a pair of second submatrix parasitism minor matters of oscillator center both sides asymmetrical load of second broadband submatrix.
- The omnidirectional antenna 5. super-wide band high-gain wave beam as claimed in claim 4 is faced upward, it is characterised in that first submatrix is parasitic Minor matters are arranged along oscillator arms, and gap is left between oscillator arms, and the center of the first submatrix parasitism minor matters projects to inwardly Do not contacted up between the gap location between oscillator two-arm, both sides the first submatrix parasitism minor matters among oscillator, first cummerbund The bottom of the oscillator arms of battle array is provided with projection in the side towards end.
- The omnidirectional antenna 6. super-wide band high-gain wave beam as claimed in claim 5 is faced upward, it is characterised in that the second broadband submatrix Oscillator two-arm in middle location overlap, but does not electrically connect up and down, the second submatrix parasitism minor matters arrange along oscillator arms, and Gap is left between oscillator arms, the center of the second submatrix parasitism minor matters protrudes inwardly, is bonded oscillator arms profile, but do not extend to Among oscillator.
- The omnidirectional antenna 7. super-wide band high-gain wave beam as claimed in claim 6 is faced upward, it is characterised in that the first broadband submatrix Oscillator both arms total length with the second broadband submatrix is (0.3~0.5) λC, wherein λCCentered on wavelength.
- The omnidirectional antenna 8. super-wide band high-gain wave beam as claimed in claim 7 is faced upward, it is characterised in that the feed cable, Cable transforming section, joint current, along center of antenna axis direction cabling, also, each cable and feed wire side multiple spot welding Connect.
- The omnidirectional antenna 9. super-wide band high-gain wave beam as claimed in claim 8 is faced upward, it is characterised in that the feed wire is flat Row two-conductor feeder line, is overlapped along array direction and with array axis, is formed by the wide transforming section cascade of more piece Length discrepancy；Center Position is distributing point, and both ends are short dot, distributing point be non-metallic via and on divide into pad, short dot was then to metallize Hole, upper and lower feeder line is connected.
- The omnidirectional antenna 10. super-wide band high-gain wave beam as claimed in claim 9 is faced upward, it is characterised in that it further comprises One antenna house, antenna house bottom end opening, top closure, and setting coaxial with antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710807431.2A CN107732440B (en) | 2017-09-08 | 2017-09-08 | Ultra-wideband high-gain beam upward-tilting omnidirectional antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710807431.2A CN107732440B (en) | 2017-09-08 | 2017-09-08 | Ultra-wideband high-gain beam upward-tilting omnidirectional antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107732440A true CN107732440A (en) | 2018-02-23 |
| CN107732440B CN107732440B (en) | 2024-01-05 |
Family
ID=61205846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710807431.2A Active CN107732440B (en) | 2017-09-08 | 2017-09-08 | Ultra-wideband high-gain beam upward-tilting omnidirectional antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107732440B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736152A (en) * | 2018-04-18 | 2018-11-02 | 广东通宇通讯股份有限公司 | A kind of minimized wide-band high-gain omni-directional antenna |
| CN112216970A (en) * | 2020-09-25 | 2021-01-12 | 杭州泛利科技有限公司 | Miniaturized high-gain flexible unmanned aerial vehicle antenna |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100141545A1 (en) * | 2008-12-09 | 2010-06-10 | Pakosz Daniel A | Dual-band omnidirectional antenna |
| WO2012065420A1 (en) * | 2010-11-16 | 2012-05-24 | 广东盛路通信科技股份有限公司 | Combined small diameter omni-directional antenna with dual-frequency |
| WO2012065421A1 (en) * | 2010-11-16 | 2012-05-24 | 广东盛路通信科技股份有限公司 | Broadband and dual-band omni-directional antenna with high performance |
| CN104409858A (en) * | 2014-11-27 | 2015-03-11 | 中国船舶重工集团公司第七二四研究所 | Coaxial crossed vibrator array communication antenna and design method thereof |
| CN104795630A (en) * | 2015-04-24 | 2015-07-22 | 普联技术有限公司 | Dual-band omnidirectional WIFI (wireless fidelity) antenna |
| CN105244613A (en) * | 2015-10-29 | 2016-01-13 | 深圳市大疆创新科技有限公司 | Microstrip antenna |
| CN106816695A (en) * | 2016-11-29 | 2017-06-09 | 广东通宇通讯股份有限公司 | Three frequency range high-gain omnidirectional dipole antennas |
| CN106941210A (en) * | 2017-02-23 | 2017-07-11 | 广东通宇通讯股份有限公司 | Super-wide band high-gain omnidirectional antenna and its ultra wide band oscillator unit |
| CN207474667U (en) * | 2017-09-08 | 2018-06-08 | 广东通宇通讯股份有限公司 | Super-wide band high-gain wave beam is faced upward omnidirectional antenna |
-
2017
- 2017-09-08 CN CN201710807431.2A patent/CN107732440B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100141545A1 (en) * | 2008-12-09 | 2010-06-10 | Pakosz Daniel A | Dual-band omnidirectional antenna |
| WO2012065420A1 (en) * | 2010-11-16 | 2012-05-24 | 广东盛路通信科技股份有限公司 | Combined small diameter omni-directional antenna with dual-frequency |
| WO2012065421A1 (en) * | 2010-11-16 | 2012-05-24 | 广东盛路通信科技股份有限公司 | Broadband and dual-band omni-directional antenna with high performance |
| CN104409858A (en) * | 2014-11-27 | 2015-03-11 | 中国船舶重工集团公司第七二四研究所 | Coaxial crossed vibrator array communication antenna and design method thereof |
| CN104795630A (en) * | 2015-04-24 | 2015-07-22 | 普联技术有限公司 | Dual-band omnidirectional WIFI (wireless fidelity) antenna |
| CN105244613A (en) * | 2015-10-29 | 2016-01-13 | 深圳市大疆创新科技有限公司 | Microstrip antenna |
| CN106816695A (en) * | 2016-11-29 | 2017-06-09 | 广东通宇通讯股份有限公司 | Three frequency range high-gain omnidirectional dipole antennas |
| CN106941210A (en) * | 2017-02-23 | 2017-07-11 | 广东通宇通讯股份有限公司 | Super-wide band high-gain omnidirectional antenna and its ultra wide band oscillator unit |
| CN207474667U (en) * | 2017-09-08 | 2018-06-08 | 广东通宇通讯股份有限公司 | Super-wide band high-gain wave beam is faced upward omnidirectional antenna |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736152A (en) * | 2018-04-18 | 2018-11-02 | 广东通宇通讯股份有限公司 | A kind of minimized wide-band high-gain omni-directional antenna |
| CN108736152B (en) * | 2018-04-18 | 2024-02-20 | 广东通宇通讯股份有限公司 | Miniaturized broadband high-gain omnidirectional antenna |
| CN112216970A (en) * | 2020-09-25 | 2021-01-12 | 杭州泛利科技有限公司 | Miniaturized high-gain flexible unmanned aerial vehicle antenna |
| CN112216970B (en) * | 2020-09-25 | 2023-02-24 | 杭州泛利科技有限公司 | Miniaturized high-gain flexible unmanned aerial vehicle antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107732440B (en) | 2024-01-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106816695B (en) | Three frequency range high-gain omnidirectional dipole antennas | |
| CN102299418B (en) | Multilayer broadband microstrip antenna | |
| CN108987903A (en) | The series feed linear array circular polarization microstrip antenna of micro-strip | |
| CN1881685B (en) | Cross feed broadband printed Yagi antenna | |
| CN207624912U (en) | A kind of double frequency dipole antenna and micro-base station | |
| CN110137672A (en) | A kind of beam scanning antennas array for integrating side and penetrating with end-fire | |
| US20120062437A1 (en) | Antenna system with planar dipole antennas and electronic apparatus having the same | |
| CN209515999U (en) | A kind of circular polarization microstrip antenna | |
| CN106229649B (en) | A kind of compact conformal array antenna of genome units based on LTCC technology | |
| CN106450712A (en) | Multi-rotor unmanned aerial vehicle high-gain omnidirectional conformal diversity antenna technology | |
| CN203596414U (en) | Tapered slot antenna and phased array antenna thereof | |
| CN202855895U (en) | Dual polarized MIMO antenna array | |
| CN107240769A (en) | Low section double frequency ultra-wideband antenna | |
| CN106299650A (en) | L-type loads the wideband omnidirectional circular polarisation printed antenna improving floor | |
| CN109286066A (en) | A kind of leaky-wave antenna of Stepped Impedance composite left-and-right-hand structure | |
| CN207475549U (en) | omni-directional array antenna | |
| US11189916B2 (en) | Double-frequency antenna structure with high isolation | |
| CN107732441A (en) | Wave beam is faced upward high-gain omni-directional antenna | |
| CN110419144A (en) | Antenna element and aerial array | |
| CN107732440A (en) | Super-wide band high-gain wave beam is faced upward omnidirectional antenna | |
| CN105703084A (en) | Indoor distribution antenna | |
| CN106159435B (en) | Ultra-wideband fractal antenna | |
| CN103943972B (en) | composite antenna structure | |
| CN207474667U (en) | Super-wide band high-gain wave beam is faced upward omnidirectional antenna | |
| WO2019100376A1 (en) | Omnidirectional array antenna and beamforming method therefor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |