CN109088175A - A kind of space exploration Vivaldi broad-band antenna array system - Google Patents
A kind of space exploration Vivaldi broad-band antenna array system Download PDFInfo
- Publication number
- CN109088175A CN109088175A CN201810889652.3A CN201810889652A CN109088175A CN 109088175 A CN109088175 A CN 109088175A CN 201810889652 A CN201810889652 A CN 201810889652A CN 109088175 A CN109088175 A CN 109088175A
- Authority
- CN
- China
- Prior art keywords
- microstrip line
- sections
- vivaldi
- power splitter
- vivaldi antenna
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
-
- 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
- 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
- H01Q13/085—Slot-line radiating ends
-
- 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
- H01Q13/106—Microstrip slot antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
- H01Q21/0075—Stripline fed arrays
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The present invention relates to a kind of space exploration Vivaldi broad-band antenna array systems, which includes feeding network and Vivaldi antenna array；The feeding network includes power splitter；The Vivaldi antenna array includes multiple Vivaldi antenna elements；The power splitter has the output port to match with Vivaldi antenna element number；The output port of the power splitter connects one to one with Vivaldi antenna element.The present invention reduces the lowest operating frequency of antenna, has broadened Antenna Operation bandwidth by carrying out edge slot treatment to Vivaldi antenna element；Vivaldi antenna array is fed using the exponential fade type T-type power splitter for offering V-groove simultaneously, effectively reduces the return loss of feeding network；The high-order mode and stray magnetic field generated in energy transmission is reduced simultaneously, is conducive to form antenna significantly more efficient feed, improves the gain of antenna.
Description
Technical field
The present invention relates to space exploration technical fields, and in particular to a kind of space exploration Vivaldi broad-band antenna array
System.
Background technique
With the development of deep space exploration technology, the receiving sensitivity of main observation device, radio telescope is continuously improved,
The frequency observed rises to GHz from MHz.Wherein 1-2GHz frequency range includes hydroxyl maser, and neutral hydrogen spectral line, pulsar etc. is rich
Rich ephemeris information.However as the development of modern communications, requirement of the various communication services to frequency spectrum resource is higher and higher, wirelessly
Electric frequency spectrum resource is more and more nervous.The mobile communication that wherein groundwork frequency range concentrates on 1-2GHz, which observes radio astronomy, to be generated
Biggish interference.Therefore it needs to solve electromagnetic interference of the radio telescope suffered by 1-2GHz by the relevant technologies at present
Problem reduces the return loss of antenna, promotes radio telescope 1-2GHz observing capacity.And promote radio telescope observing capacity
One step of key be promoted its phased array feed performance, it has been investigated how promoted 1-2GHz phased array feed receptivity
It is of great significance.
Summary of the invention
In view of this, it is an object of the invention to overcome the deficiencies of the prior art and provide a kind of space exploration Vivaldi
Broad-band antenna array system, the wideband array system can be effectively reduced return loss, reduce the high-order generated in energy transmission
Mould and stray magnetic field can form significantly more efficient feed to antenna, improve the gain of antenna.
In order to achieve the above object, the present invention adopts the following technical scheme: a kind of space exploration Vivaldi wide bandwidth antenna arrays
Column system, comprising:
Feeding network and Vivaldi antenna array；
Wherein, the feeding network includes: power splitter；
The Vivaldi antenna array includes: multiple Vivaldi antenna elements；
The power splitter has the output port to match with the Vivaldi antenna element number；
The output port of the power splitter connects one to one with the Vivaldi antenna element.
Optionally, the Vivaldi antenna element includes: radiant section and feed section；
The radiant section includes: the exponential fade line of rabbet joint；
The feed section includes: fan-shaped offset of microstrip line and circular resonant cavity；
Multiple rectangle wave grooves are uniformly provided on the outer edge of the exponential fade line of rabbet joint.
Optionally, the width of the rectangle wave groove is 1.13mm, the interval between the two neighboring rectangle wave groove
For 1.07mm, the length of the rectangle wave groove is 17.75mm.
Optionally, the power splitter is exponential fade T-type power splitter；The exponential fade T-type power splitter is that broadband one is divided
Four power splitters.
Optionally, the broadband one divides four power splitters to include: impedance transformer and a, c, d, e, f, g, h, I, k, l, m, n, p
Section microstrip line；
Wherein, a sections of microstrip line is the input terminal microstrip line of the power splitter；
The c, d, e and f section microstrip line are one-to-two constant amplitude with mutually output microstrip line；
It is four constant amplitudes with mutually output microstrip line that the g, h, I, k, l, m, n and p a section microstrip line, which are one point,；
The output end of a sections of microstrip line is connect with the input terminal of the impedance transformer, the impedance transformer it is defeated
Outlet is connect with the input terminal of the c and d sections of microstrip line respectively, the output end of the c sections of microstrip line and the e sections of microstrip line
Input terminal connection, the output end of the e sections of microstrip line are connect with the input terminal of the g and h sections of microstrip line respectively, and described g sections micro-
Output end with line connects the input terminal of the l sections of microstrip line, and the output end of the h sections of microstrip line connects the m sections of microstrip line
Input terminal；
The output end of the d sections of microstrip line is connect with the input terminal of the f sections of microstrip line, the output of the f sections of microstrip line
End is connect with the input terminal of the i and k sections of microstrip line respectively, and the output end of the i sections of microstrip line connects the n sections of microstrip line
Input terminal, the output end of the k sections of microstrip line connect the input terminal of the p sections of microstrip line；
The output end of the l, m, n and p section microstrip line is connect with corresponding Vivaldi antenna element respectively.
Optionally, a, c, d, e, f, g, h, I, k, l, m, n and p a section microstrip line are exponential gradual change microstrip line.
Optionally, V-groove is offered in the junction of the exponential fade T-type power splitter.
Optionally, the impedance transformer includes: the wavelength impedance transformers of multistage λ/4；
The multistage wavelength impedance transformers of λ/4 are to be connected to be formed by more piece quarter wavelength impedance transducer.
Optionally, the Vivaldi antenna element use dielectric constant for 4.4 FR4_epoxy medium substrate；
The medium substrate with a thickness of 1.6mm；
The size of the Vivaldi antenna is 125mm × 86mm.
The invention adopts the above technical scheme, and space exploration Vivaldi broad-band antenna array system includes: feed
Network and Vivaldi antenna array；The feeding network includes: power splitter；The Vivaldi antenna array includes: multiple
Vivaldi antenna element；The power splitter has the output port to match with the Vivaldi antenna element number；It is described
The output port of power splitter connects one to one with the Vivaldi antenna element.The present invention is edges corrugated by using rectangle
Vivaldi antenna element after slot treatment, reduces the lowest operating frequency of antenna, broadens the bandwidth of operation of antenna, inhibits
Higher hamonic wave；Simultaneously using a 1 point of 4 exponential fade type T-type power splitter for offering V-groove to the Vivaldi antenna array
Column are fed, and are effectively reduced the return loss of feeding network, have been broadened the bandwidth of feeding network；Energy biography is reduced simultaneously
The high-order mode and stray magnetic field of defeated middle generation are conducive to form antenna significantly more efficient feed, improve the gain of antenna.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is Vivaldi wideband array overall system architecture schematic diagram provided by one embodiment of the present invention；
Fig. 2 is the structural schematic diagram of Vivaldi antenna element provided by the invention；
Fig. 3 is the corresponding parameter indexing figure of Vivaldi antenna element provided by the invention；
Fig. 4 is a kind of return loss plot of Vivaldi antenna element emulation provided by the invention；
Fig. 5 (a) is the structural schematic diagram of the Vivaldi antenna element edges corrugated with rectangle provided by the invention；
Fig. 5 (b) is the return loss plot of the emulation of Vivaldi antenna element described in Fig. 5 (a)；
Fig. 6 is the structural schematic diagram that four power splitters are divided in broadband one provided by the invention；
Fig. 7 is the structural schematic diagram of the exponential fade T-type power splitter provided by the invention equipped with V-groove；
Fig. 8 is the S11 analogous diagram of power splitter described in Fig. 7；
Fig. 9 is the Vivaldi wideband array overall system architecture schematic diagram that another embodiment of the present invention provides；
Figure 10 (a) is the active standing-wave ratio analogous diagram of Vivaldi wideband array described in Fig. 9；
Figure 10 (b) is the gain analogous diagram of Vivaldi wideband array described in Fig. 9.
In figure: 1, power splitter；2, Vivaldi antenna array；3, the first Vivaldi antenna element；4, the 2nd Vivaldi days
Line unit；5, the 3rd Vivaldi antenna element；6, the 4th Vivaldi antenna element；7, the exponential fade line of rabbet joint；8, fan-shaped offset of microstrip
Line；9, circular resonant cavity；10, dielectric-slab；11, rectangle wave groove；12, impedance transformer；13, V-groove.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical solution of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
Fig. 1 is Vivaldi wideband array overall system architecture schematic diagram provided by one embodiment of the present invention.
As shown in Figure 1, the space exploration in the present embodiment includes: with Vivaldi broad-band antenna array system
Feeding network and Vivaldi antenna array 2；
Wherein, the feeding network includes: power splitter 1；
The Vivaldi antenna array 2 includes: multiple Vivaldi antenna elements；
The power splitter 1 has the output port to match with the Vivaldi antenna element number；
The output port of the power splitter 1 connects one to one with the Vivaldi antenna element.
For Vivaldi antenna element, though the length of antenna element less than the wavelength of 3~5 center operating frequencies,
Good ultra-wide characteristic still may be implemented.Compared with long Vivaldi antenna, short Vivaldi antenna beamwidth is wider,
Gain and directionality are relatively weaker.
Further, as shown in Fig. 2, the Vivaldi antenna element includes: radiant section and feed section；
The radiant section includes: the exponential fade line of rabbet joint 7；
The feed section includes: fan-shaped offset of microstrip line 8 and circular resonant cavity 9；
Multiple rectangle wave grooves 11 are uniformly provided on the outer edge of the exponential fade line of rabbet joint 7.
Further, the width of the rectangle wave groove 11 is 1.13mm, between the two neighboring rectangle wave groove 11
Between be divided into 1.07mm, the length of the rectangle wave groove 11 is 17.75mm.
In practical applications, since the design of Vivaldi antenna element was not only specific without accurate calculation formula, but also not
Design method, so be designed by simulation optimization mostly.Tapered slot is determined by the working frequency range of antenna first
Starting and terminate width, then by the input impedance of simulation software simulation analysis Vivaldi antenna element, then according to antenna
The input impedance of unit goes to design suitable feed Balun, and finally using simulation optimization to carry out impedance matching makes antenna element can be with
It works in more wide-band.Since Vivaldi antenna parameter is more, simulation optimization is very time-consuming.The present embodiment extracts simultaneously
The relevant parameter for analyzing Vivaldi antenna element, the influence by analysis of key parameter to Vivaldi antenna element performance,
To provide specific Optimization Steps and optimization method, and then reduce the simulation optimization time of antenna, shortens the design week of antenna
Phase.
As shown in figure 3, in figure,
The length of L:Vivaldi antenna element；Rs: the radius of round line of rabbet joint resonant cavity；
W: the widest part of tapered slot opening；Rm: the radius of fan-shaped offset of microstrip stub；
G: the most narrow place of tapered slot opening； AR: fan-shaped offset of microstrip stub subtended angle；
R: the curvature of the exponential fade line of rabbet joint 7； Wm2: the width of 50 ohm microstrips；
Wm1: the width of the impedance transformer of λ/4 12；
The key parameter of Vivaldi antenna element is analyzed:
The length of Vivaldi antenna index tapered slot 7 and the gain size of antenna are positively correlated, generally in order to ensure day
The gain of line, it is desirable that lower-cut-off frequency is greater than 2 wavelength lower than the length of 1GHz broad-band antenna, and lower-cut-off frequency is higher than
Big 1 wavelength of the length of 1GHz broad-band antenna, according to the criterion of travelling-wave aerial, centered on the length for generally taking Vivaldi antenna
3-5 wavelength of frequency.W is the widest part of tapered slot opening, determines the lower-cut-off frequency of antenna, generally takes
The lower-cut-off frequency of Vivaldi antenna corresponds to the 1/2 of waveguide wavelength, and both W should meet following formula:
fminFor the lower limit work cutoff frequency of antenna element, εrIndicate relative dielectric constant.G in Fig. 3 is tapered slot
Most narrow place, determine the highest frequency of Antenna Operation, g value takes 2% or so of wavelength corresponding to highest frequency.R be index gradually
The curvature for becoming the line of rabbet joint 7, determines the bending degree of curve, has large effect to the gain and main lobe width of antenna element.With
The increase of R, antenna main lobe is broadening, gain decline.Therefore in the case where return loss can satisfy design objective, it should make
The curvature R of the exponential fade line of rabbet joint 7 is small as far as possible.
The exponential fade line of rabbet joint 7 can be made to keep short circuit, general cut-off in bigger frequency range using round line of rabbet joint resonant cavity
Diameter Rs is 1/4 of guide wavelength in the line of rabbet joint corresponding to the frequency of center；Microstrip line can be made wider using fan-shaped offset of microstrip stub
Frequency range in realize open circuit effect, generally take Rm be center frequency correspond to 1/4 of guide wavelength in micro-strip, the fan-shaped center of circle
Angle ARGenerally obtained by optimization design；Wm1For the width of quarter wavelength impedance transducer 12, Wm250 ohm microstrips respectively
The width of line, can be by being simply calculated.
The size for obtaining Vivaldi antenna element described in the present embodiment by simulation optimization is as follows: L=125mm, W=
86mm, R=0.05, Rs=4mm, Rm=12mm, Wm=3mm, exponential fade profile equation meet following formula:
Y=± (c1eRx+c2)
Wherein,
Fig. 4 gives the return loss plot of Vivaldi antenna element emulation, the overall dimensions of antenna be 125mm ×
86mm, while -10dB the bandwidth of the antenna element is 0.8-5.8GHz as shown in Figure 4, it can thus be concluded that the frequency multiplication bandwidth of antenna is
7.25, relative bandwidth 151%.
Further, multiple rectangle wave grooves 11 are uniformly provided on the outer edge of the exponential fade line of rabbet joint 7.To described
Vivaldi antenna element, which carries out slot treatment, can extend current path, inhibit the generation of surface wave, and then can reduce antenna
Lower-frequency limit, widen the working frequency range of antenna.The specific size of opened rectangular channel is as follows: the width of the rectangle wave groove 11
For 1.13mm, between the two neighboring rectangle wave groove 11 between be divided into 1.07mm, the length of the rectangle wave groove 11 is
17.75mm.Fig. 5 gives structure and its return loss analogous diagram with the edges corrugated Vivaldi antenna element of rectangle, should
The overall dimensions of antenna are 125mm × 86mm, and size is consistent with the Vivaldi unit in Fig. 4.By Fig. 5 (b) it is found that the antenna
- 10dB bandwidth be 0.66-5.76Hz, it can thus be concluded that the frequency multiplication bandwidth of antenna be 8.72, relative bandwidth 158%.
It is found that there is more preferably antenna performance using the Vivaldi antenna element after the edges corrugated slot treatment of rectangle,
The main reason for its antenna performance improves has a following two points: first it is edges corrugated can produce more resonance, and then can drop
The lowest operating frequency of low antenna broadens the bandwidth of operation of antenna；Second uses the edges corrugated electricity that can change antenna edge
It flows away to inhibiting higher hamonic wave, and then generate higher gain and narrower wave beam.
Further, the Vivaldi antenna element use dielectric constant for 4.4 FR4_epoxy medium substrate；
The medium substrate with a thickness of 1.6mm；
The size of the Vivaldi antenna is 125mm × 86mm.
As shown in fig. 6, the power splitter 1 is exponential fade T-type power splitter；The exponential fade T-type power splitter is broadband
One point of four power splitter.
Specifically, the broadband one divides four power splitters to include: impedance transformer 12 and a, c, d, e, f, g, h, I, k, l, m,
N, p sections of microstrip lines；
Wherein, a sections of microstrip line is the input terminal microstrip line of the power splitter 1；
The c, d, e and f section microstrip line are one-to-two constant amplitude with mutually output microstrip line；
It is four constant amplitudes with mutually output microstrip line that the g, h, I, k, l, m, n and p a section microstrip line, which are one point,；
The output end of a sections of microstrip line is connect with the input terminal of the impedance transformer 12, the impedance transformer 12
Output end connect respectively with the input terminal of the c and d sections of microstrip line, the output end of the c sections of microstrip line and the e sections of micro-strip
The input terminal of line connects, and the output end of the e sections of microstrip line is connect with the input terminal of the g and h sections of microstrip line respectively, the g
The output end of section microstrip line connects the input terminal of the l sections of microstrip line, and described m sections of the output end connection of the h sections of microstrip line is micro-
Input terminal with line；
The output end of the d sections of microstrip line is connect with the input terminal of the f sections of microstrip line, the output of the f sections of microstrip line
End is connect with the input terminal of the i and k sections of microstrip line respectively, and the output end of the i sections of microstrip line connects the n sections of microstrip line
Input terminal, the output end of the k sections of microstrip line connect the input terminal of the p sections of microstrip line；
The output end of the l, m, n and p section microstrip line is connect with corresponding Vivaldi antenna element respectively.
Wherein, in Fig. 6, port 1 is input port, and port 2,3,4,5 is output port.
Further, a, c, d, e, f, g, h, I, k, l, m, n and p a section microstrip line are exponential gradual change microstrip line.
In the wideband array system, each Vivaldi antenna element forms the Vivaldi as a bay
Aerial array 2, wherein the Vivaldi antenna array 2 may include four Vivaldi antenna elements (the first Vivaldi days
Line unit 3, the 2nd Vivaldi antenna element 4, the 3rd Vivaldi antenna element 5 and the 4th Vivaldi antenna element 6).This is
In system, feeding network is partitioned energy into using the power splitter 1 to each bay, for Vivaldi antenna array 2, is
So that aerial array is reached maximum gain, needs to carry out array element that amplitude is identical, phase consistent feed.Constant amplitude is carried out to array element
Degree feed requires feeding networks at different levels using power splitter 1 is halved, and carries out equiphase feed to array element and then requires transmission networks at different levels
The feed line length of network is consistent.Therefore the feeding network of the Vivaldi wideband array multistage bisection function equal using feed line length
Divide device 1.Parallelly feeding design is simple, broader bandwidth, and beam direction is unrelated with frequency.
In order to make the Vivaldi Wide band array antenna in the present embodiment reach maximum gain, need simultaneously in array
Four array elements carry out the identical feed of amplitude equal phase.For Vivaldi antenna element, traditional micro-strip-line of rabbet joint feed
Balun mostly uses the impedance transformer of λ/4 12 to carry out impedance transformation, and quarter wavelength impedance transducer 12 is located at fan-shaped offset of microstrip branch
Between section and 50 ohm microstrips of input terminal.Due to the impedance discontinuity in junction, the impedance transformer of traditional λ/4 12
Often bring biggish return loss.It, can be by more piece quarter wavelength impedance transducer 12 in order to reduce return loss
Series connection forms multistage λ/4 wavelength impedance transformers 12, can make impedance transformation more continuous in this way, and then can effectively reduce connection
The return loss at place.Save section between impedance variations can reduce with the increase of joint number, when joint number tends to be infinite, section with
Impedance variations between section go to zero, and multistage impedance converter 12 can regard the continuous gradual change cable architecture of impedance as at this time.
For Vivaldi Wide band array antenna, gradual change cable architecture is applied to its feeding network, it is possible to reduce feed
The return loss of network makes more energy transmissions to Vivaldi antenna element, forms significantly more efficient radiation.The present embodiment
Used exponential fade T-type power splitter, can reduce the loss of feeding network, widen the bandwidth of feeding network.
Further, since having stronger discontinuity at T-type power splitter tubercle, cause traditional T-type power splitter in energy
Assigning process in often generate high-order mode and stray magnetic field, this will will cause biggish return loss.
As shown in fig. 7, the present embodiment offers V-groove 13 in the junction of the exponential fade T-type power splitter, to described
The junction of T-type power splitter carries out slot treatment, can effectively reduce impedance discontinuity, and then reduce return loss.
As shown in figure 8,1 point of 4 exponential fade type T-type power splitter for offering V-groove 13 can effectively subtract through simulation analysis
The high-order mode and stray magnetic field of small junction reduce the return loss of power splitter 1.Fig. 8 gives 1 point of 4 finger for offering V-groove 13
The S11 analogous diagram of number gradation type T-type power splitter, dielectric-slab 10 used by emulating are FR4_epoxy plate, the dielectric of dielectric-slab 10
Constant is 4.4, dielectric-slab 10 with a thickness of 1.6mm, the overall dimensions of T-type power splitter are 124mm × 384mm.It, can from Fig. 8
Find out, exponential fade T-type power splitter -15dB bandwidth is 1-8GHz, illustrates that designed T-type power splitter has reached design requirement.
In Fig. 9, the embodiment of the optional Vivaldi wideband array system of another kind of the invention is provided.The implementation
In example, the power splitter 1 is using 1 point of 4 exponential fade type T-type power splitter for offering V-groove 13.The Vivaldi antenna array
The overall dimensions of column 2 are 249mm × 380mm, and the medium substrate for emulating use is FR4_epoxy plate, and dielectric constant 4.4 is thick
Degree is 1.6mm.For single Vivaldi antenna element, the impedance of antenna port is described using the return loss of antenna
With characteristic；And for Vivaldi array, then the port Impedance of array is described using active standing-wave ratio, that is, Active VSWR
With characteristic.Figure 10 gives the active standing-wave ratio and gain analogous diagram of this implementation Vivaldi wideband array.By Figure 10
(a) known in this band limits of 0.8-3GHz, the Active VSWR of array covers the 1- in design objective less than 2
2GHz has reached design requirement in bandwidth.
By Figure 10 (b) it is found that the gain of array is greater than 3dB in this band limits of 1-3GHz.Cover design objective
In 1-2GHz, design requirement has been reached in gain.
The present embodiment uses a 1 point of 4 exponential fade type T-type power splitter for offering V-groove 13, for described
Vivaldi antenna array 2 is fed.In the design of T-type power splitter, impedance is realized using exponential gradual change microstrip line
Transformation, effectively reduces the return loss of feeding network, has broadened the bandwidth of feeding network.Connection to T-type power splitter simultaneously
Place has carried out slot treatment, reduces the high-order mode and stray magnetic field generated in energy transmission, more energy will be made with amplitude phase
The identical form of equiphase is transferred to four Vivaldi array elements in array, forms significantly more efficient feed to antenna, significantly
Increase the gain of antenna.
It should be added that the Vivaldi wideband array system can be not only used for the feed of radio telescope,
Battle array can also be individually organized, large-scale low frequency array is constituted, is used for deep space exploration.
It is understood that same or similar part can mutually refer in the various embodiments described above, in some embodiments
Unspecified content may refer to the same or similar content in other embodiments.
It should be noted that in the description of the present invention, term " first ", " second " etc. are used for description purposes only, without
It can be interpreted as indication or suggestion relative importance.In addition, in the description of the present invention, unless otherwise indicated, the meaning of " multiple "
Refer at least two.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, to execute function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware
Any one of column technology or their combination are realized: having a logic gates for realizing logic function to data-signal
Discrete logic, with suitable combinational logic gate circuit specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
It, can also be in addition, each functional unit in each embodiment of the present invention can integrate in a processing module
It is that each unit physically exists alone, can also be integrated in two or more units in a module.Above-mentioned integrated mould
Block both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized and when sold or used as an independent product in the form of software function module, also can store in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (9)
1. a kind of space exploration Vivaldi broad-band antenna array system characterized by comprising feeding network and Vivaldi
Aerial array；
Wherein, the feeding network includes: power splitter；
The Vivaldi antenna array includes: multiple Vivaldi antenna elements；
The power splitter has the output port to match with the Vivaldi antenna element number；
The output port of the power splitter connects one to one with the Vivaldi antenna element.
2. wideband array system according to claim 1, which is characterized in that the Vivaldi antenna element includes: radiation
Part and feed section；
The radiant section includes: the exponential fade line of rabbet joint；
The feed section includes: fan-shaped offset of microstrip line and circular resonant cavity；
Multiple rectangle wave grooves are uniformly provided on the outer edge of the exponential fade line of rabbet joint.
3. wideband array system according to claim 2, which is characterized in that the width of the rectangle wave groove is
1.13mm, between the two neighboring rectangle wave groove between be divided into 1.07mm, the length of the rectangle wave groove is
17.75mm。
4. wideband array system according to claim 1, which is characterized in that the power splitter is exponential fade T-type function point
Device；The exponential fade T-type power splitter is that four power splitters are divided in broadband one.
5. wideband array system according to claim 4, which is characterized in that the broadband one divides four power splitters to include: resistance
Resistance parallel operation and a, c, d, e, f, g, h, I, k, l, m, n, p section microstrip line；
Wherein, a sections of microstrip line is the input terminal microstrip line of the power splitter；
The c, d, e and f section microstrip line are one-to-two constant amplitude with mutually output microstrip line；
It is four constant amplitudes with mutually output microstrip line that the g, h, I, k, l, m, n and p a section microstrip line, which are one point,；
The output end of a sections of microstrip line is connect with the input terminal of the impedance transformer, the output end of the impedance transformer
It is connect respectively with the input terminal of the c and d sections of microstrip line, the input of the output end of the c sections of microstrip line and the e sections of microstrip line
End connection, the output end of the e sections of microstrip line are connect with the input terminal of the g and h sections of microstrip line respectively, the g sections of microstrip line
Output end connect the input terminal of the l sections of microstrip line, the output end of the h sections of microstrip line connects the defeated of the m sections of microstrip line
Enter end；
The output end of the d sections of microstrip line is connect with the input terminal of the f sections of microstrip line, the output end point of the f sections of microstrip line
It is not connect with the input terminal of the i and k sections of microstrip line, the output end of the i sections of microstrip line connects the input of the n sections of microstrip line
End, the output end of the k sections of microstrip line connect the input terminal of the p sections of microstrip line；
The output end of the l, m, n and p section microstrip line is connect with corresponding Vivaldi antenna element respectively.
6. wideband array system according to claim 5, which is characterized in that a, c, d, e, f, g, h, I, k, l, m, n
It is exponential gradual change microstrip line with p sections of microstrip lines.
7. wideband array system according to claim 5, which is characterized in that in the company of the exponential fade T-type power splitter
The place of connecing offers V-groove.
8. wideband array system according to claim 5, which is characterized in that the impedance transformer includes: the wave of multistage λ/4
Long impedance transformer；
The multistage wavelength impedance transformers of λ/4 are to be connected to be formed by more piece quarter wavelength impedance transducer.
9. wideband array system according to claim 5, which is characterized in that the Vivaldi antenna element uses dielectric
The FR4_epoxy medium substrate that constant is 4.4；
The medium substrate with a thickness of 1.6mm；
The size of the Vivaldi antenna is 125mm × 86mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810889652.3A CN109088175A (en) | 2018-08-06 | 2018-08-06 | A kind of space exploration Vivaldi broad-band antenna array system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810889652.3A CN109088175A (en) | 2018-08-06 | 2018-08-06 | A kind of space exploration Vivaldi broad-band antenna array system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109088175A true CN109088175A (en) | 2018-12-25 |
Family
ID=64833723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810889652.3A Withdrawn CN109088175A (en) | 2018-08-06 | 2018-08-06 | A kind of space exploration Vivaldi broad-band antenna array system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109088175A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111276804A (en) * | 2020-02-11 | 2020-06-12 | 东南大学 | Ultra-wideband antenna array based on digital coding and high-precision dual-beam scanning method thereof |
| CN113410639A (en) * | 2021-05-25 | 2021-09-17 | 西安理工大学 | Vivaldi antenna |
| CN114188709A (en) * | 2021-10-22 | 2022-03-15 | 山东师范大学 | Vivaldi antenna for medical imaging and manufacturing method thereof |
| CN114566793A (en) * | 2022-03-09 | 2022-05-31 | 湖南国科雷电子科技有限公司 | Broadband directional diagram reconfigurable antenna |
-
2018
- 2018-08-06 CN CN201810889652.3A patent/CN109088175A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111276804A (en) * | 2020-02-11 | 2020-06-12 | 东南大学 | Ultra-wideband antenna array based on digital coding and high-precision dual-beam scanning method thereof |
| CN113410639A (en) * | 2021-05-25 | 2021-09-17 | 西安理工大学 | Vivaldi antenna |
| CN113410639B (en) * | 2021-05-25 | 2023-02-21 | 西安理工大学 | Vivaldi antenna |
| CN114188709A (en) * | 2021-10-22 | 2022-03-15 | 山东师范大学 | Vivaldi antenna for medical imaging and manufacturing method thereof |
| CN114566793A (en) * | 2022-03-09 | 2022-05-31 | 湖南国科雷电子科技有限公司 | Broadband directional diagram reconfigurable antenna |
| CN114566793B (en) * | 2022-03-09 | 2022-11-04 | 湖南国科雷电子科技有限公司 | Broadband directional diagram reconfigurable antenna |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Tu et al. | 28/38 GHz dual-band MIMO antenna with low mutual coupling using novel round patch EBG cell for 5G applications | |
| CN109088175A (en) | A kind of space exploration Vivaldi broad-band antenna array system | |
| JP4918594B2 (en) | Antenna based on metamaterial structure | |
| CN109980366B (en) | Broadband dual-circular-polarization end-fire array antenna based on gap waveguide | |
| CN113113782B (en) | Broadband metal flat plate array antenna, radar and wireless communication system | |
| CN104466317A (en) | Gallium arsenide dual-mode band-pass filter and manufacturing method thereof | |
| Mighani et al. | A CPW dual band notched UWB antenna | |
| EP3261179B1 (en) | Leaky wave antenna | |
| CN108306087B (en) | Double-frequency transmission line and double-frequency leaky-wave antenna thereof | |
| Rafiqul et al. | A 2X2 MIMO Patch Antenna for Multi-Band Applications | |
| Tiwari et al. | Two element microstrip-fed slot loaded millimeter wave MIMO antenna | |
| KR102244144B1 (en) | Compact Multi-Band Power Divider With Zero-Degree Composite Right-/Left-Hand Transmission Lines | |
| CN106229656B (en) | Wide beam MIMO antenna | |
| CN211743396U (en) | High-isolation gap ultra-wideband MIMO antenna | |
| Khabba et al. | Beam-steerable ultra-wide-band miniaturized elliptical phased array antenna using inverted-L-shaped modified inset feed and defected ground structure for 5G smartphones millimeter-wave applications | |
| Khabba et al. | Beam-steering millimeter-wave antenna array for fifth generation smartphone applications | |
| Abdelhamid et al. | A four-element UWB MIMO antenna using SRRs for application in satellite communications | |
| CN207303352U (en) | A kind of SIW gaps crossfeed array antenna system | |
| Kumar et al. | Compact two-port antenna with high isolation based on the defected ground for THz communication | |
| CN210129580U (en) | Novel multi-frequency broadband microstrip antenna | |
| CN107887703B (en) | Dual-band vortex electromagnetic wave array antenna | |
| Ambika et al. | Semicircle CSRR with circular slot array structures for high level mutual coupling reduction in MIMO antenna | |
| Hamid | Wideband reconfigurable antennas | |
| Naser et al. | W-Shaped Eight-Port Wideband MIMO Antenna | |
| CN110556628A (en) | Novel multi-frequency broadband microstrip antenna |
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 | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181225 |