CN208637591U - Vivaldi antenna - Google Patents
Vivaldi antenna Download PDFInfo
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- CN208637591U CN208637591U CN201821190444.6U CN201821190444U CN208637591U CN 208637591 U CN208637591 U CN 208637591U CN 201821190444 U CN201821190444 U CN 201821190444U CN 208637591 U CN208637591 U CN 208637591U
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Abstract
The utility model discloses a kind of vivaldi antennas, are related to communication antenna technical field.The vivaldi antenna includes the identical first antenna unit of size and the second antenna element, the first antenna unit and the second antenna element include antenna medium plate and radiation patch, the upside of the centre of dielectric layer on the first antenna unit offers the first notch from top to bottom, and the radiation patch on the first antenna unit is the symmetrical axisymmetric upper surface that the dielectric layer is arranged in first notch；The downside among dielectric layer on second antenna element offers the second notch from top to bottom, and the radiation patch on second antenna element is the symmetrical axisymmetric upper surface that the dielectric layer is arranged in second notch；First antenna unit links together with the second antenna element in positive right-angled intersection.The vivaldi antenna has the advantages that high gain, high-efficient and stable radiation.
Description
Technical field
The utility model relates to communication antenna technical field more particularly to a kind of vivaldi antennas.
Background technique
The frequency range that typical near-field measurement is limited to probe antenna is narrow, and only a kind of polarization, these deficiencies lead to measurement of marching into the arena
Cumbersome, inefficiency.In order to realize that the near-field test of quick high accuracy, broadband dual polarization probe antenna are answered in large quantities
In near field measurement.In order to which the impedance matching realized in broadband loads Chip-R, in this way meeting in aerial radiation arm
Lead to the reduction of antenna efficiency and antenna gain.
Utility model content
Technical problem to be solved in the utility model is how to provide a kind of high gain, high-efficient, stable radiation
Vivaldi antenna.
In order to solve the above technical problems, technical solution adopted in the utility model is: a kind of vivaldi antenna, it is special
Sign is: including the identical first antenna unit of size and the second antenna element, the first antenna unit and the second antenna list
Member includes antenna medium plate and radiation patch, and the upside of the centre of the dielectric layer on the first antenna unit opens up from top to bottom
There is the first notch, the radiation patch on the first antenna unit is symmetrical axisymmetric setting described with first notch
The upper surface of dielectric layer；The downside of the centre of dielectric layer on second antenna element offers the second notch from top to bottom,
The upper of the dielectric layer is arranged in second notch to be symmetrically axisymmetric in radiation patch on second antenna element
Surface, and the figure phase of the figure of the radiation patch on the first antenna unit and the radiation patch on the second antenna element
Together；The sum of the first notch length and the second notch length are identical as the length of the antenna medium plate, first notch
Width and the second notch width it is identical as the thickness of the antenna medium plate, first antenna unit and the second antenna element
When connecting together, the dielectric layer below the first notch is inserted into the second notch, and the dielectric layer above the second notch is inserted into
In first notch, first antenna unit is made to link together with the second antenna element in positive right-angled intersection.
A further technical solution lies in: the radiation patch includes symmetrically arranged left radiation patch part and right radiation
Patch portion, the left radiation patch part includes lower radiation patch, radiation patch in middle radiation patch and first, under described
It is maintained between radiation patch and middle radiation patch and is spaced and is connected by the first loading resistor, the middle radiation patch and first
It is connected between upper radiation patch by the second loading resistor, is provided with connected to it the on described first on the outside of radiation patch
Radiation patch on two.
A further technical solution lies in: radiation patch is interior in the lower radiation patch, middle radiation patch and first
The curve at edge is exponential fade profile.
A further technical solution lies in: the generally class of radiation patch is semicircle on described second.
A further technical solution lies in: the resistance value of the loading resistor is 100 ohm.
A further technical solution lies in: the polytetrafluoroethylene (PTFE) progress that the antenna medium plate is 2.55 using dielectric constant
Production.
A further technical solution lies in: the antenna medium plates with a thickness of 1.5mm, radiation patch with a thickness of
0.035mm。
A further technical solution lies in: the upper and lower side of the lower radiation patch is horizontal line, and lower radiation patch is outer
Side is vertical line, and upper and lower side horizontal line, outside upright line and the inside curve in lower radiation patch surround generally right angle ladder
The radiation patch of shape；The upper and lower side of the middle radiation patch is horizontal line, and the outside of middle radiation patch is vertical line, middle spoke
Upper and lower side horizontal line, outside upright line and the inside curve penetrated on patch surround the radiation patch of generally right-angled trapezium；Institute
The downside for stating radiation patch on first is horizontal line, and the outside of radiation patch is vertical line, radiation patch on first on first
On lower horizontal line, outside upright line and inside curve surround the radiation patch of generally right angled triangle.
A further technical solution lies in: the antenna further includes barron structure, and the barron structure includes being located at antenna
The input terminal microstrip line and output end microstrip line of dielectric-slab upper surface, the input terminal microstrip line is from table on the antenna medium plate
The intermediate lateral of the left or right side edge in face towards the antenna element extends, and the medial end of the input terminal microstrip line
It is attached between the signal wire of the co-planar waveguide of antenna medium plate lower surface by plated-through hole, the antenna is situated between
The lower surface of scutum is additionally provided with the U-shaped ground line of co-planar waveguide, and the signal wire is located in the opening of the U-shaped ground line,
Interval is maintained between the input terminal microstrip line and the output end microstrip line, and the output end microstrip line is T-type, output
It is attached between end microstrip line and two free ends of the U-shaped ground line by plated-through hole, the output end micro-strip
The one end of line on the inside of the antenna element extends to the radiation patch on the first antenna unit or the second antenna element
On, carry out coupling excitation.
The beneficial effects of adopting the technical scheme are that the antenna is using innovative structure type, it is excellent
The radiation characteristic of antenna is changed；With comprehensive means carry out load realize miniaturization, with conventional means compared with size reduction 50% with
On；Gain is moderate, easy to process by PCB technology, convenient for integrated.
Detailed description of the invention
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.
Fig. 1 is that the schematic view of the front view of first antenna unit described in the utility model embodiment (does not have balun knot
Structure)；
Fig. 2 is that the schematic view of the front view of the second antenna element described in the utility model embodiment (does not have balun knot
Structure)；
Fig. 3 is that the schematic view of the front view of first antenna unit described in the utility model embodiment (has balun knot
Structure)；
Fig. 4 is the schematic perspective view of antenna described in the utility model embodiment；
Fig. 5 is the perspective view of barron structure described in the utility model embodiment；
Wherein: 1, first antenna unit 2, the second antenna element 3, antenna medium plate 4, the first notch 5, the second notch 6, under
Radiation patch 9 in radiation patch 7, middle radiation patch 8, first, the first loading resistor 10, spoke on the second loading resistor 11, second
It penetrates patch 12, barron structure 13, input terminal microstrip line 14, output end microstrip line 15, signal wire 16, plated-through hole 17, U-shaped connect
Ground wire.
Specific embodiment
Below with reference to the attached drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear
Chu is fully described by, it is clear that and described embodiment is only a part of the embodiment of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Many details are explained in the following description in order to fully understand the utility model, but this is practical new
Type can also be implemented using other than the one described here other way, and those skilled in the art can be without prejudice to this reality
With doing similar popularization in the case where novel intension, therefore the utility model is not limited by the specific embodiments disclosed below.
As shown in Figs 1-4, the utility model embodiment discloses a kind of vivaldi antenna, it is characterised in that: including size
Identical first antenna unit 1 and the second antenna element 2, the first antenna unit 1 and the second antenna element 2 are situated between including antenna
Scutum 3 and radiation patch.The upside of the centre of dielectric layer on the first antenna unit 1 offers the first notch from top to bottom
4, radiation patch on the first antenna unit 1 is symmetrical axisymmetric be arranged in the dielectric layer with first notch 4
Upper surface；The downside of the centre of dielectric layer on second antenna element 2 offers the second notch 5 from top to bottom, described
Radiation patch on second antenna element 2 is the symmetrical axisymmetric upper table that the dielectric layer is arranged in second notch 5
Face, and the figure phase of the figure of the radiation patch on the first antenna unit 1 and the radiation patch on the second antenna element 2
Together；The sum of first notch, 4 length and 5 length of the second notch are identical as the length of the antenna medium plate 3, first slot
The width of mouth 4 and the width of the second notch 5 are identical as the thickness of the antenna medium plate 3；First antenna unit 1 and second day
When line unit 2 connects together, the dielectric layer of 4 lower section of the first notch is inserted into the second notch 5, Jie of 5 top of the second notch
Matter layer is inserted into the first notch 4, and first antenna unit 1 is made to link together with the second antenna element 2 in positive right-angled intersection.
Further, as shown in Figure 1-Figure 3, the radiation patch includes symmetrically arranged left radiation patch part and right spoke
Penetrate patch portion.The left radiation patch part includes lower radiation patch 6, radiation patch 8 in middle radiation patch 7 and first,
It is maintained between the lower radiation patch 6 and middle radiation patch 7 and is spaced and is connected by the first loading resistor 9, the middle radiation
It is connected between radiation patch 8 by the second loading resistor 10 on patch 7 and first, the outside of radiation patch 8 is set on described first
It is equipped with radiation patch 11 on connected to it second.
In the lower radiation patch 6, middle radiation patch 7 and first curve of the inward flange of radiation patch 8 be index gradually
Varied curve.Exponential fade profile byIt determines, wherein p1 (x1, y1), p2 (x2, y2) are respectively transition line
Beginning and end, R is exponential factor, c in formula1And c2It is calculated by following formula:
The gradual curvature R of exponential curve determines the trend of vivaldi antenna line of rabbet joint gradual change.Resistance of the value of R to antenna
There are great influences for anti-coupling bandwidth.
The generally class of radiation patch 11 is semicircle on described second, and the terminal of exponential fade profile is provided with class semicircle
The Irregular shaped patch of shape (radiation patch on second), widens impedance bandwidth, while realizing Miniaturization Design；The first load electricity
The resistance value of resistance 9 and the second loading resistor 10 is 100 ohm.The antenna medium plate 3 uses poly- four that dielectric constant is 2.55
Vinyl fluoride is made, to realize the miniaturization of antenna；Preferably, the antenna medium plate with a thickness of 1.5mm, radiation patch
With a thickness of 0.035mm.
Further, as shown in Figure 1-Figure 3, the upper and lower side of the lower radiation patch 6 is horizontal line, and lower radiation patch 6
Outside be vertical line, upper and lower side horizontal line, outside upright line and inside curve in lower radiation patch 6 surround generally
The radiation patch of right-angled trapezium；The upper and lower side of the middle radiation patch 7 is horizontal line, and the outside of middle radiation patch 7 is vertical
Line, upper and lower side horizontal line, outside upright line and inside curve in middle radiation patch 7 surround the spoke of generally right-angled trapezium
Penetrate patch；On described first the downside of radiation patch 8 be horizontal line, and on first radiation patch 8 outside be vertical line, first
Lower horizontal line, outside upright line and inside curve in upper radiation patch 8 surround the radiation patch of generally right angled triangle
Piece.
As shown in figure 5, the antenna further includes barron structure 12, the barron structure 12 includes being located at antenna medium plate 3
The input terminal microstrip line 13 and output end microstrip line 14 of upper surface.The input terminal microstrip line 13 is from the antenna medium plate 3
The intermediate lateral of the left or right side edge on surface towards the antenna element extends, and the inside of the input terminal microstrip line 13
It is attached between the signal wire 15 of the co-planar waveguide of end and 3 lower surface of antenna medium plate by plated-through hole 16,
The lower surface of the antenna medium plate 3 is additionally provided with the U-shaped ground line 17 of co-planar waveguide, and the signal wire 15 is located at described U-shaped
In the opening of ground line 17.Interval is maintained between the input terminal microstrip line 13 and the output end microstrip line 14, and described
Output end microstrip line 14 is T-type, passes through metallization between output end microstrip line 14 and two free ends of the U-shaped ground line 17
Through-hole 16 is attached, and the one end of the output end microstrip line 14 on the inside of the antenna element extends to the first antenna
In radiation patch on unit 1 or the second antenna element 2.
The transition interconnection architecture that the barron structure proposes is microstrip line-co-planar waveguide-microstrip line transitional structure.Input
It is connected and is realized by the signal wire of plated-through hole transition structure and the co-planar waveguide of bottom after holding microstrip line to extend certain length
First time transition, the complete transition of electromagnetic field are to transmit on medium back co-planar waveguide.Following co-planar waveguide continues to extend,
Later, the ground line of co-planar waveguide is connected by plated-through hole with the output end microstrip line for being located at dielectric-slab top layer, passes through this
The mode of sample realizes the transition between second of different transmission line.It is final the result is that radiofrequency signal passes through this transition structure
The reverse phase of phase is realized afterwards, and input and output port is all that microstrip line construction has no effect on the transition structure in day simultaneously
Interconnection in line.
Transition structure proposed in the barron structure plays the role of input signal carrying out phasing back.It can pass through
The number of antenna surface current path come judge antenna whether broadband, when antenna surface current path diversification, different electricity
Flow path corresponds to different working frequency points, to illustrate that antenna can work on a wide frequency band, the Vivaldi antenna can
Diversified, continuous current path is provided, to realize very wide bandwidth.In addition, when designing antenna, it is also necessary to consider
The resistance matching problem of feeding network and antenna.The superiority and inferiority of impedance matching has a great impact to Antenna Operation performance.Vivaldi
The input impedance of two radiation patch of antenna and two output port impedances of balun are all 120 ohms, theoretically may be used
To realize good impedance matching, this has just well solved the resistance matching problem of feeding network and antenna in broad-band antenna.
Designed balun only accounts for entire antenna small part as the feeding network of antenna, small-sized, realizes miniaturization
Requirement have that structure is simple, easy of integration, easy processing using PCB technology, have good characteristic.
The vivaldi antenna can cover the frequency range of 0.4GHz-6GHz, and the cross polarization degree of coupling is less than -35dB,
Orthogonal thereto cross arrangement between first antenna unit and the second antenna element, mutual coupling very little between unit have ultra wide band and double
Polarization characteristic.Small form factor requirements are combined in order to meet the ultra wide band of 0.4GHz-6GHz in vivaldi Antenna Design, are adopted
With the method for load, by resistor loaded (the first loading resistor and the second loading resistor) and the medium of high dielectric constant is loaded,
And in the semicircular Irregular shaped patch of terminal loads class (radiation patch on second), realized using sacrificing antenna gain as cost
The broadening of the beamwidth of antenna and the miniaturization of size.
The centre of dielectric layer on the first antenna unit 1 offers the first notch 4, second antenna from top to bottom
The centre of dielectric layer on unit 2 offers the second notch 5 from top to bottom, the sum of length of the first notch 4 and the second notch 5 with
Antenna itself is isometric, and width is suitable with antenna medium substrates thickness, only in this way that the antenna element of linear polarization is mutual along its axis
Ground truncation is mended, and the position for adjusting separately respective feeder line makes it be staggered just, could be handled by their good intercalations together
Good this structural relation just will not influence the bandwidth of operation and radiance of antenna.In addition, the side of the antenna balun feed
Formula feeds the radiation patch of vivaldi antenna, devises a kind of Novel ultra wide band barron structure, which is to be based on
The design of broadband transition structure, can reduce influence of the balun bandwidth to the beamwidth of antenna, functional, have a good application prospect.
Claims (9)
1. a kind of vivaldi antenna, it is characterised in that: including the identical first antenna unit (1) of size and the second antenna element
(2), the first antenna unit (1) and the second antenna element (2) include antenna medium plate (3) and radiation patch, and described first
The upside of the centre of dielectric layer on antenna element (1) offers the first notch (4) from top to bottom, the first antenna unit
(1) radiation patch on is the symmetrical axisymmetric upper surface that the dielectric layer is arranged in first notch (4)；Described
The downside of the centre of dielectric layer on two antenna elements (2) offers the second notch (5) from top to bottom, second antenna element
(2) radiation patch on is the symmetrical axisymmetric upper surface that the dielectric layer is arranged in second notch (5), and described
The figure of radiation patch on first antenna unit (1) is identical as the figure of radiation patch on the second antenna element (2)；It is described
The sum of first notch (4) length and the second notch (5) length are identical as the length of the antenna medium plate (3), first slot
The width of mouth (4) and the width of the second notch (5) are identical as the thickness of the antenna medium plate (3), first antenna unit (1)
When connecting together with the second antenna element (2), the dielectric layer below the first notch (4) is inserted into the second notch (5), and second
Dielectric layer above notch (5) is inserted into the first notch (4), makes first antenna unit (1) and the second antenna element (2) in just
Right-angled intersection links together.
2. vivaldi antenna as described in claim 1, it is characterised in that: the radiation patch includes symmetrically arranged left spoke
Patch portion and right radiation patch part are penetrated, the left radiation patch part includes lower radiation patch (6), middle radiation patch (7)
And radiation patch (8) on first, it maintains and is spaced and by the between the lower radiation patch (6) and middle radiation patch (7)
One loading resistor (9) connects, and passes through the second loading resistor on the middle radiation patch (7) and first between radiation patch (8)
(10) it connects, is provided with radiation patch (11) on connected to it second on the outside of radiation patch (8) on described first.
3. vivaldi antenna as claimed in claim 2, it is characterised in that: the lower radiation patch (6), middle radiation patch (7)
And the curve of the inward flange of radiation patch (8) is exponential fade profile on first.
4. vivaldi antenna as claimed in claim 2, it is characterised in that: radiation patch (11) is generally on described second
Class is semicircle.
5. vivaldi antenna as claimed in claim 2, it is characterised in that: first loading resistor (9) and the second load
The resistance value of resistance (10) is 100 ohm.
6. vivaldi antenna as described in claim 1, it is characterised in that: the antenna medium plate (3) is using dielectric constant
2.55 polytetrafluoroethylene (PTFE) is made.
7. vivaldi antenna as described in claim 1, it is characterised in that: the antenna medium plate with a thickness of 1.5mm, spoke
Penetrate patch with a thickness of 0.035mm.
8. vivaldi antenna as claimed in claim 2, it is characterised in that: the upper and lower side of the lower radiation patch (6) is water
Horizontal line, and the outside of lower radiation patch (6) is vertical line, upper and lower side horizontal line, outside upright line on lower radiation patch (6)
And inside curve surrounds the radiation patch of generally right-angled trapezium；The upper and lower side of the middle radiation patch (7) is horizontal line,
And the outside of middle radiation patch (7) is vertical line, upper and lower side horizontal line, outside upright line on middle radiation patch (7) and interior
Lateral curvature line surrounds the radiation patch of generally right-angled trapezium；The downside of radiation patch (8) is horizontal line on described first, and first
The outside of upper radiation patch (8) is vertical line, lower horizontal line, outside upright line on first in radiation patch (8) and interior
Lateral curvature line surrounds the radiation patch of generally right angled triangle.
9. vivaldi antenna as described in claim 1, it is characterised in that: the antenna further includes barron structure (12), described
Barron structure (12) includes the input terminal microstrip line (13) and output end microstrip line (14) positioned at antenna medium plate (3) upper surface,
The input terminal microstrip line (13) is from the left or right side edge of antenna medium plate (3) upper surface towards the antenna element
Intermediate lateral extend, and the medial end of the input terminal microstrip line (13) and antenna medium plate (3) lower surface are total to
It is attached between the signal wire (15) that surface wave is led by plated-through hole (16), the lower surface of the antenna medium plate (3) is also
It is provided with the U-shaped ground line (17) of co-planar waveguide, the signal wire (15) is located in the opening of the U-shaped ground line (17), institute
It states and maintains interval between input terminal microstrip line (13) and the output end microstrip line (14), and the output end microstrip line (14)
For T-type, between output end microstrip line (14) and two free ends of the U-shaped ground line (17) by plated-through hole (16) into
Row connection, the one end of the output end microstrip line (14) on the inside of the antenna element extend to the first antenna unit
(1) or in the radiation patch on the second antenna element (2), coupling excitation is carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821190444.6U CN208637591U (en) | 2018-07-26 | 2018-07-26 | Vivaldi antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821190444.6U CN208637591U (en) | 2018-07-26 | 2018-07-26 | Vivaldi antenna |
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| Publication Number | Publication Date |
|---|---|
| CN208637591U true CN208637591U (en) | 2019-03-22 |
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ID=65738440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821190444.6U Active CN208637591U (en) | 2018-07-26 | 2018-07-26 | Vivaldi antenna |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108767471A (en) * | 2018-07-26 | 2018-11-06 | 胡南 | Vivaldi antennas |
| CN113054424A (en) * | 2021-03-16 | 2021-06-29 | 杭州永谐科技有限公司东莞分公司 | A miniaturized Vivaldi antenna that is used for low frequency ultra wide band of probe |
| CN116613544A (en) * | 2023-06-28 | 2023-08-18 | 北京星英联微波科技有限责任公司 | Compact high gain broadband lens antenna |
-
2018
- 2018-07-26 CN CN201821190444.6U patent/CN208637591U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108767471A (en) * | 2018-07-26 | 2018-11-06 | 胡南 | Vivaldi antennas |
| CN108767471B (en) * | 2018-07-26 | 2024-01-19 | 胡南 | vivaldi antenna |
| CN113054424A (en) * | 2021-03-16 | 2021-06-29 | 杭州永谐科技有限公司东莞分公司 | A miniaturized Vivaldi antenna that is used for low frequency ultra wide band of probe |
| CN116613544A (en) * | 2023-06-28 | 2023-08-18 | 北京星英联微波科技有限责任公司 | Compact high gain broadband lens antenna |
| CN116613544B (en) * | 2023-06-28 | 2024-02-23 | 北京星英联微波科技有限责任公司 | Compact high gain broadband lens antenna |
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