CN209461636U - A kind of fork-shaped ultra wide band Vivaldi antenna - Google Patents
A kind of fork-shaped ultra wide band Vivaldi antenna Download PDFInfo
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- CN209461636U CN209461636U CN201822183623.3U CN201822183623U CN209461636U CN 209461636 U CN209461636 U CN 209461636U CN 201822183623 U CN201822183623 U CN 201822183623U CN 209461636 U CN209461636 U CN 209461636U
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Abstract
The utility model relates to a kind of fork-shaped ultra wide band Vivaldi antennas, including antenna medium substrates, aerial radiation module and feed microstrip line module, the aerial radiation module includes upper surface metal layer and lower surface metal layer, the parallel line of rabbet joint and the exponential fade line of rabbet joint are respectively provided in the upper surface metal layer and the lower surface metal layer, microstrip transmission line is arranged in the feed microstrip line module, the parallel line of rabbet joint and microstrip transmission line coupling, a plurality of fork-shaped gap is arranged in the two sides of the exponential fade line of rabbet joint, the height in the fork-shaped gap tapers off along exponential fade direction of dehiscing.A plurality of fork-shaped gap is arranged in the two sides of the exponential fade line of rabbet joint, fork-shaped gap is by antenna surface restriction of current around tapered slot, it can guarantee that antenna radiation characteristics are better to improve, improve the impedance matching of antenna, the bandwidth of antenna is expanded, and the gain of antenna is improved, enhance antenna end-fire effect, while antenna size is minimized.
Description
Technical field
The utility model relates to a kind of Vivaldi antenna more particularly to a kind of fork-shaped ultra wide band Vivaldi antennas.
Background technique
Ultra wide band Vivaldi antenna is a kind of common device in frequency microwave field, is examined in aerospace, material
The fields such as survey, microwave imaging are very widely used.How to design while meeting miniaturization, wide impedance bandwidth and good radiativity
The antenna of energy is current industry problem to be solved.Vivaldi antenna (i.e. index line style taper slot antenna) is for ultra-wide
One of optimal antenna with technology was put forward for the first time in 1979 by Gibson, was a kind of taper slot that comprehensive performance is more excellent
Antenna.
As a kind of end-fire travelling-wave aerial, the line of rabbet joint is designed by exponential fade opening.Theoretically Vivaldi days
Line should have infinitely great bandwidth, but the working band of actually tradition Vivaldi antenna is limited by antenna aperture size.It is general
To be introduced energy by modes such as microstrip line, strip line or coaxial lines, by modes such as medium couples, by feeding transmission line with
It radiates the line of rabbet joint and carries out energy conversion, electromagnetic wave is transmitted by the line of rabbet joint to free space, is usually made in line of rabbet joint terminal using circular cavity
For short circuit termination, and micro-strip terminal using sector structure as open circuit termination, to realize the Broadband Matching of entire feed section.It is existing
There are the Vivaldi beamwidth of antenna and size by actual influence, it is relatively limited.
Utility model content
The technical issues of the utility model solves is: constructing a kind of fork-shaped ultra wide band Vivaldi antenna, overcomes existing skill
Art Vivaldi antenna is influenced by bandwidth and size, and function difficulty has further raising.
The technical solution of the utility model is: constructing a kind of fork-shaped ultra wide band Vivaldi antenna, including antenna medium base
Plate, aerial radiation module and feed microstrip line module, the aerial radiation module include upper surface metal layer and lower surface metal
Layer, the antenna medium substrates include first antenna medium substrate and the second antenna medium substrates, the upper surface metal layer and
The feed microstrip line module is separately positioned on the opposing sides of the first antenna medium substrate, and the lower surface metal layer is set
It sets in the one side of second antenna medium substrates, the first antenna medium substrate and second antenna medium substrates are folded
It closes, is respectively provided with the parallel line of rabbet joint and the exponential fade line of rabbet joint, the micro-strip in the upper surface metal layer and the lower surface metal layer
Microstrip transmission line, the parallel line of rabbet joint and microstrip transmission line coupling is arranged in line power feeding module, the exponential fade line of rabbet joint
Two sides are arranged a plurality of fork-shaped gap, and the height in the fork-shaped gap tapers off along exponential fade direction of dehiscing.
The further technical solution of the utility model is: the upper surface metal layer and the lower surface metal layer radiation side
To symmetrical.
The further technical solution of the utility model is: barrier slit is arranged in fork-shaped gap end.
The further technical solution of the utility model is: the through-hole communicated up and down being arranged between the fork-shaped gap.
The further technical solution of the utility model is: the feed microstrip line module includes microstrip line metal layer, described
Sector open-circuit is arranged in microstrip line metal layer end.
The further technical solution of the utility model is: the first antenna medium substrate and the second antenna medium base
Plate overlapping makes the upper surface metal layer and the lower surface metal layer in outer surface, is formed simultaneously symmetric radiation.
The further technical solution of the utility model is: the height in the fork-shaped gap is dehisced direction along exponential fade
Successively decrease in equal difference.
The further technical solution of the utility model is: the fork-shaped gap is equally spaced.
The further technical solution of the utility model is: the upper surface metal layer and the lower surface metal layer further include
The round line of rabbet joint is set.
The technical effect of the utility model is: constructing a kind of fork-shaped ultra wide band Vivaldi antenna, including antenna medium base
Plate, aerial radiation module and feed microstrip line module, the aerial radiation module include upper surface metal layer and lower surface metal
Layer, the antenna medium substrates include first antenna medium substrate and the second antenna medium substrates, the upper surface metal layer and
The feed microstrip line module is separately positioned on the opposing sides of the first antenna medium substrate, and the lower surface metal layer is set
It sets in the one side of second antenna medium substrates, the first antenna medium substrate and second antenna medium substrates are folded
It closes, is respectively provided with the parallel line of rabbet joint and the exponential fade line of rabbet joint, the micro-strip in the upper surface metal layer and the lower surface metal layer
Microstrip transmission line, the parallel line of rabbet joint and microstrip transmission line coupling is arranged in line power feeding module, the exponential fade line of rabbet joint
Two sides are arranged a plurality of fork-shaped gap, and the height in the fork-shaped gap tapers off along exponential fade direction of dehiscing.This is practical
A plurality of fork-shaped gap, crotch is arranged in the two sides of a kind of novel fork-shaped ultra wide band Vivaldi antenna, the exponential fade line of rabbet joint
Shape gap is by antenna surface restriction of current around tapered slot, it is ensured that antenna radiation characteristics are better to improve, and mention
The impedance matching of high antenna, has expanded the bandwidth of antenna, and improves the gain of antenna, enhances antenna end-fire effect, while day
Linear dimension is minimized.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
Combined with specific embodiments below, technical solutions of the utility model are further illustrated.
As shown in Figure 1, specific embodiment of the present utility model is: a kind of fork-shaped ultra wide band Vivaldi antenna is constructed,
It is described including antenna medium substrates (not shown), aerial radiation module 2 and feed microstrip line module ((not shown))
Aerial radiation module 2 includes upper surface metal layer 21 and lower surface metal layer (not shown), the antenna medium substrates packet
Include first antenna medium substrate and the second antenna medium substrates, the upper surface metal layer and feed microstrip line module difference
The opposing sides of the first antenna medium substrate is set, and the lower surface metal layer is arranged in the second antenna medium base
In the one side of plate, the first antenna medium substrate and second antenna medium substrates overlapping, the upper surface metal layer and
The parallel line of rabbet joint and the exponential fade line of rabbet joint 22 are respectively provided in the lower surface metal layer, the feed microstrip line module setting micro-strip passes
A plurality of fork-shaped is arranged in defeated line, the parallel line of rabbet joint and microstrip transmission line coupling, the two sides of the exponential fade line of rabbet joint 22
Gap 23, the height in the fork-shaped gap 23 taper off along exponential fade direction of dehiscing.
As shown in Figure 1, the specific implementation process of the utility model is: antenna medium substrates use the height of certain dielectric constant
The energy of microstrip feed line is transferred to the aerial radiation module 2 by electromagnetic coupling mode by frequency plate, antenna medium substrates.Institute
It states aerial radiation module 2 and includes upper surface metal layer 21 and lower surface metal layer, upper surface metal layer 21 and lower surface metal layer
As the purposes of aerial radiation patch, the round impedance matching line of rabbet joint, the parallel line of rabbet joint and exponential fade slot are carved on metal conductor layer
Line.The effect of the round line of rabbet joint is mainly to maintain Antenna Impedance Matching, and the parallel line of rabbet joint and microstrip transmission line play the transmission that intercouples
The effect of electromagnetic wave, the exponential fade line of rabbet joint, which plays the electromagnetic wave of aerial radiation, guides into, and the two sides of the exponential fade line of rabbet joint 22 are dug
Several fork-shaped gaps 23 being equally spaced out, chinky altitude successively decrease along exponential fade direction of dehiscing in equal difference, last gold
Belong to the sector open-circuit structure that microstrip feed line includes rectangular microstrip line He its end, sector open-circuit structure plays the work of impedance matching
With.The exponential fade line of rabbet joint 22 has several to open the fork-shaped gap 23 that direction equal difference is successively decreased with the exponential fade line of rabbet joint.
Under normal conditions, the low-frequency range medium wavelength of working band is that the corresponding line of rabbet joint is dehisced 2 times of wide end maximum width；And
The highest frequency point of antenna operating band is then limited by line of rabbet joint narrow end width, and narrow end width is generally highest frequency wavelength
0.02 times.In actual design production, due to needing to consider the factors such as antenna size size, medium substrate, the line of rabbet joint is dehisced wide end
It can use minimum frequency point corresponds to medium wavelength 1/6, the long line of rabbet joint is about 1 medium wavelength, and can obtain preferable antenna performance.This
The Vivaldi antenna index gradient ramp model formation of utility model:
F (x)=± (c1*exp (vR1*x2)+c2)
Wherein: vR1 is the fade rate of exponential function, and c1 and c2 are coefficient, if parallel lines line of rabbet joint section and tapered slot section rise
The central point of point intersection two o'clock is that origin constructs rectangular coordinate system, and x is the corresponding x coordinate of each point on the exponential fade line of rabbet joint, f (x)
Indicate the exponential fade line of rabbet joint on point to longitudinal axis y-axis distance.
Preferred embodiments of the present invention are: the upper surface metal layer 21 and the lower surface metal layer radiation side
To symmetrical.The energy of microstrip feed line is transferred to surface metal conductor layer, micro-strip by electromagnetic coupling mode by antenna medium substrates
Line metal layer provides a kind of feed microstrip line mode, and sector open-circuit structure is contained in end, is used for impedance matching, surface metal conductor
Layer travels to electromagnetic energy in air or other media according to certain rule.
In the preferred embodiments of the present invention, the through-hole 24 communicated up and down is set between the fork-shaped gap 23, is referred to
There is barrier slit in number tapered slot end.By setting through-hole 24 and barrier slit, the impedance bandwidth of antenna is effectively extended,
And keep certain gain.
Preferred embodiments of the present invention are: the first antenna medium substrate and second antenna medium substrates
Overlapping makes the upper surface metal layer and the lower surface metal layer in outer surface, is formed simultaneously symmetric radiation.Specific implementation
In the process, the upper surface metal layer, microstrip line metal layer are respectively printed at the two sides of first antenna medium substrate, the upper table
For face metal layer in the front of first antenna medium substrate, second antenna medium substrates are arranged in the lower surface metal layer
Reverse side, and radiation direction is symmetrical, two blocks of dielectric-slabs are overlapped by padding process.
The technical effect of the utility model is: constructing a kind of fork-shaped ultra wide band Vivaldi antenna, including antenna medium base
Plate (not shown), aerial radiation module 2 and feed microstrip line module ((not shown)), the aerial radiation module 2
Including upper surface metal layer 21 and lower surface metal layer (not shown), the antenna medium substrates include first antenna medium
Substrate and the second antenna medium substrates, the upper surface metal layer and the feed microstrip line module are separately positioned on described first
The opposing sides of antenna medium substrates, the lower surface metal layer are arranged in the one side of second antenna medium substrates, institute
State first antenna medium substrate and second antenna medium substrates overlapping, the upper surface metal layer and the lower surface metal
The parallel line of rabbet joint and the exponential fade line of rabbet joint 22 are respectively provided on layer, microstrip transmission line is arranged in the feed microstrip line module, described parallel
A plurality of fork-shaped gap 23, the tree is arranged in the line of rabbet joint and microstrip transmission line coupling, the two sides of the exponential fade line of rabbet joint 22
The height in wooden fork shape gap 23 tapers off along exponential fade direction of dehiscing.A kind of fork-shaped ultra wide band Vivaldi of the utility model
Antenna, the two sides of the exponential fade line of rabbet joint 22 are arranged a plurality of fork-shaped gap 23, and fork-shaped gap 23 is by antenna surface electric current
It is constrained in around tapered slot, it is ensured that antenna radiation characteristics are better to improve, and improve the impedance matching of antenna, open up
The bandwidth of antenna has been opened up, and has improved the gain of antenna, has enhanced antenna end-fire effect, while antenna size is minimized.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is only limited to these instructions.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, should all regard
To belong to the protection scope of the utility model.
Claims (9)
1. a kind of fork-shaped ultra wide band Vivaldi antenna, which is characterized in that including antenna medium substrates, aerial radiation module and
Feed microstrip line module, the aerial radiation module include upper surface metal layer and lower surface metal layer, the antenna medium base
Plate includes first antenna medium substrate and the second antenna medium substrates, the upper surface metal layer and the feed microstrip line module
It is separately positioned on the opposing sides of the first antenna medium substrate, the lower surface metal layer setting is situated between in second antenna
In the one side of matter substrate, the first antenna medium substrate and second antenna medium substrates overlapping, the upper surface metal
Micro-strip is arranged with the parallel line of rabbet joint and the exponential fade line of rabbet joint, the feed microstrip line module is respectively provided in the lower surface metal layer in layer
A plurality of fork-shaped is arranged in transmission line, the parallel line of rabbet joint and microstrip transmission line coupling, the two sides of the exponential fade line of rabbet joint
Gap, the height in the fork-shaped gap taper off along exponential fade direction of dehiscing.
2. fork-shaped ultra wide band Vivaldi antenna according to claim 1, which is characterized in that the upper surface metal layer and
The lower surface metal layer radiation direction is symmetrical.
3. fork-shaped ultra wide band Vivaldi antenna according to claim 1, which is characterized in that fork-shaped gap end
Barrier slit is set.
4. fork-shaped ultra wide band Vivaldi antenna according to claim 1, which is characterized in that between the fork-shaped gap
The through-hole communicated up and down is set.
5. fork-shaped ultra wide band Vivaldi antenna according to claim 1, which is characterized in that the feed microstrip line module
Including microstrip line metal layer, sector open-circuit is arranged in microstrip line metal layer end.
6. fork-shaped ultra wide band Vivaldi antenna according to claim 1, which is characterized in that the first antenna medium base
Plate and second antenna medium substrates overlapping make the upper surface metal layer and the lower surface metal layer in outer surface, together
When form symmetric radiation.
7. fork-shaped ultra wide band Vivaldi antenna according to claim 1, which is characterized in that the height in the fork-shaped gap
Degree successively decreases along exponential fade direction of dehiscing in equal difference.
8. fork-shaped ultra wide band Vivaldi antenna according to claim 1, which is characterized in that the fork-shaped gap is equidistant
Distribution.
9. fork-shaped ultra wide band Vivaldi antenna according to claim 1, which is characterized in that the upper surface metal layer and
The lower surface metal layer further includes that the round line of rabbet joint is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822183623.3U CN209461636U (en) | 2018-12-25 | 2018-12-25 | A kind of fork-shaped ultra wide band Vivaldi antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822183623.3U CN209461636U (en) | 2018-12-25 | 2018-12-25 | A kind of fork-shaped ultra wide band Vivaldi antenna |
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| CN209461636U true CN209461636U (en) | 2019-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822183623.3U Active CN209461636U (en) | 2018-12-25 | 2018-12-25 | A kind of fork-shaped ultra wide band Vivaldi antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109509976A (en) * | 2018-12-25 | 2019-03-22 | 深圳市体医疗科技有限公司 | A kind of fork-shaped ultra wide band Vivaldi antenna |
| CN111525249A (en) * | 2020-05-22 | 2020-08-11 | 电子科技大学 | Vivaldi antenna of 30-40GHZ millimeter wave near-field imaging |
-
2018
- 2018-12-25 CN CN201822183623.3U patent/CN209461636U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109509976A (en) * | 2018-12-25 | 2019-03-22 | 深圳市体医疗科技有限公司 | A kind of fork-shaped ultra wide band Vivaldi antenna |
| CN111525249A (en) * | 2020-05-22 | 2020-08-11 | 电子科技大学 | Vivaldi antenna of 30-40GHZ millimeter wave near-field imaging |
| CN111525249B (en) * | 2020-05-22 | 2021-05-04 | 电子科技大学 | Vivaldi antenna of 30-40GHZ millimeter wave near-field imaging |
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Address after: No.1 Workshop A601, MeiXun digital technology factory, No.19 Jinxiu Middle Road, Laokeng community, Longtian street, Pingshan District, Shenzhen, Guangdong 518000 Patentee after: SHENZHEN ET MEDICAL TECHNOLOGY CO.,LTD. Address before: 518000 11b01, 11b02, 11b03 and 11b04, building B, zone 1, West Shenzhen Bay science and technology ecological park, Baishi Road, Nansha street, Nansha West Road, Nanshan District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN ET MEDICAL TECHNOLOGY CO.,LTD. |