CN110994160A - 6-18GHz 45-degree polarized metal vivaldi antenna array - Google Patents
6-18GHz 45-degree polarized metal vivaldi antenna array Download PDFInfo
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- CN110994160A CN110994160A CN201911379397.9A CN201911379397A CN110994160A CN 110994160 A CN110994160 A CN 110994160A CN 201911379397 A CN201911379397 A CN 201911379397A CN 110994160 A CN110994160 A CN 110994160A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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- 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
- H01Q21/061—Two dimensional planar arrays
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/25—Ultra-wideband [UWB] systems, e.g. multiple resonance systems; Pulse systems
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- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Abstract
The invention discloses a 6-18GHz 45-degree polarized metal vivaldi antenna array, wherein metal vivaldi antenna units are arranged and welded on an antenna array mounting plate according to a rectangular grid, and the polarization direction of the metal vivaldi antenna units is linear polarization of 45 degrees; and the radio frequency connector is connected with the bottom of each metal vivaldi antenna unit through a through hole on the antenna array mounting plate. The invention has high physical structure strength, can remove the application limit of the traditional Vivaldi antenna in the fields of multifunctional arrays, high-power radars and the like, and has small possibility of abnormal scanning in the high-frequency band of the working bandwidth. The electronic scanning of the wave beam can reach +/-45 degrees within the frequency band of 6-18GHz, and the active standing wave is less than 2.5 degrees. Has important application prospect in the aspects of electronic countermeasure, passive detection, through-wall radar and comprehensive radio frequency aperture. The design has low manufacturing cost and is easy to realize miniaturization and low profile.
Description
Technical Field
The invention relates to a 6-18GHz 45-degree polarized metal vivaldi antenna array, and belongs to the technical field of antennas.
Background
The Vivaldi (Vivaldi) antenna is an ultra-wide band antenna which is increasingly widely applied, has the advantages of wide frequency band, high gain and good time domain characteristics, can be made into an antenna with constant gain along with frequency change, and an antenna array formed by the Vivaldi (Vivaldi) antenna can be used in a broadband antenna array or a phased array of a broadband scanning angle.
At present, the traditional Vivaldi antenna adopts a planar printing structure, metal sheets with gradual change structures are respectively pasted on two sides of a dielectric substrate, the physical strength is low, the feed structure is complex, and the overall manufacturing and processing cost is high; secondly, when the Vivaldi antenna works in a high frequency band (above 6 GHz), the characteristic impedance of a microstrip line or strip line feed structure is easy to change along with the change of frequency, so that a dispersion phenomenon is generated, and the performance of the antenna array in wide-angle scanning is influenced; in addition, printed structure Vivaldi antennas are also limited in power transmission applications.
Disclosure of Invention
The purpose is as follows: the invention provides a 6-18GHz 45-degree polarized metal Vivaldi antenna array, aiming at solving the problems that the existing printed Vivaldi antenna is low in physical strength, complex in feed structure, high in cost, small in power capacity and capable of generating a dispersion phenomenon when working in a high frequency band (above 6 GHz).
The technical scheme is as follows: in order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a 6-18GHz45 ° polarized metallic vivaldi antenna array comprising: the antenna comprises metal vivaldi antenna units, an antenna array mounting plate and a radio frequency connector, wherein the metal vivaldi antenna units are arranged and welded on the antenna array mounting plate according to a rectangular grid, and the polarization direction of the metal vivaldi antenna units is linear polarization of 45 degrees; and the radio frequency connector is connected with the bottom of each metal vivaldi antenna unit through a through hole on the antenna array mounting plate.
Preferably, the metallic vivaldi antenna unit includes: the feed matching cavity is arranged between the bottom of the first metal groove wall and the base; an antenna resonant cavity is arranged at the bottom of the first metal groove wall at the front end of the feed matching cavity; a gradual groove is arranged between the first metal groove wall and the second metal groove wall, and the inner side surfaces of the first metal groove wall and the second metal groove wall are provided with an index gradual groove line; a feed probe of the radio frequency connector penetrates through the base and the feed matching cavity to be connected with the wall of the first metal groove, and the feed matching cavity is communicated with the bottom of the involute groove.
Preferably, the first metal groove wall is provided with a solder observation hole.
Preferably, the radio frequency connector 3 is in a model of SSMP-JHD.
As a preferred scheme, a first antenna installation positioning part is arranged on the left side of the base; a second antenna installation positioning part is arranged at the intersection of the right side of the base and the wall of the second metal groove; the antenna array mounting plate is provided with a step mounting groove matched with the shape of the base, and the base of the metal vivaldi antenna unit is connected with the step mounting groove on the antenna array mounting plate through welding.
Preferably, the metal vivaldi antenna unit and the antenna array mounting plate are both made of brass materials.
As a preferred scheme, a plurality of sections of arc line section surfaces and straight line section surfaces are arranged between the top end and the bottom of the outer side surface of the first metal groove wall and/or the second metal groove wall.
As a preferred scheme, the first antenna outer edge curve is sequentially arranged from bottom to top from the top to the bottom of the first metal groove wall and/or the second metal groove wall, and is set as an arc line segment, and the arc radius is between 2.8mm and 3.5 mm; the outer edge curve of the second antenna is set as a circular arc segment, and the radius of the circular arc is 1.5 mm-1.7 mm; the outer edge curve of the third antenna is set as a straight line segment, and the length of the straight line segment is 0.5 mm-0.7 mm; the outer edge curve of the fourth antenna is set as a circular arc segment, and the radius of the circular arc is 1.5 mm-1.7 mm; the outer edge curve of the fifth antenna is set as a circular arc line segment, and the radius of the circular arc is 11 mm-12 mm; the outer edge curve of the sixth antenna is set as a circular arc segment, and the radius of the circular arc is 1.4 mm-1.6 mm; the outer edge curve of the seventh antenna is set as a circular arc line segment, and the radius of the circular arc is 0.4 mm-0.6 mm; an eighth antenna outer edge curve is set as a straight line segment, and the length of the eighth antenna outer edge curve is 1 mm-1.1 mm; and the ninth antenna outer edge curve is set as a circular arc segment, and the radius of the circular arc is 0.4 mm-0.5 mm.
Preferably, the ridge curve equation of the exponential gradient groove line is that y = α eβl+ kl, where: lK value of 0.02-0.04, α value of 0.2-0.23, β value of 0.25-0.3, 12-13 mm.
Has the advantages that: according to the 6-18GHz 45-degree polarized metal Vivaldi antenna array, the full-metal Vivaldi antenna array is adopted, so that the problems of low physical strength, complex feed structure and high cost of a printed Vivaldi antenna can be well solved; the all-metal structure has high physical structure strength; the coaxial feed structure with a simple structure is adopted, so that the limitation of the application of the traditional Vivaldi antenna in the fields of multifunctional arrays, high-power radars and the like can be removed; meanwhile, due to the increase of the metal thickness of the antenna, the antenna is not easy to scan abnormally in the high-frequency band of the working bandwidth.
The invention adopts 45-degree polarization, the electronic scanning of wave beams can reach +/-45 degrees within a frequency band of 6-18GHz, and the active standing wave is less than 2.5 degrees. Has important application prospect in the aspects of electronic countermeasure, passive detection, through-wall radar and comprehensive radio frequency aperture. And the manufacturing cost is low, and miniaturization and low profile are easy to realize.
Drawings
FIG. 1 is a schematic diagram of the structure of the vivaldi antenna array of the present invention;
FIG. 2 is a schematic diagram of the front structure of the vivaldi antenna element of the present invention;
fig. 3 is a schematic diagram of curve segments of the side structure of the vivaldi antenna element of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, a 6-18GHz45 ° polarized metal vivaldi antenna array comprising: the antenna comprises a metal vivaldi antenna unit 1, an antenna array mounting plate 2 and a radio frequency connector 3; the metal vivaldi antenna units are arranged and welded on the antenna array mounting plate according to a rectangular grid, and the polarization direction of the metal vivaldi antenna units is linear polarization of 45 degrees; the radio frequency connector is connected with the bottom of each metal vivaldi antenna unit through a through hole in the antenna array mounting plate, and is used for enabling the feed structure to be simple and the index consistency to be good.
As shown in fig. 2, the metallic vivaldi antenna element 1 includes: a base 101, wherein a first metal groove wall 102 and a second metal groove wall 103 are connected to the base 101, and a feed matching cavity 104 is arranged between the bottom of the first metal groove wall 102 and the base 101; an antenna resonant cavity 105 is arranged at the bottom of the first metal slot wall 101 at the front end of the feed matching cavity 104; a gradual-change groove 106 is arranged between the first metal groove wall 102 and the second metal groove wall 103, and an exponential gradual-change groove line 107 is arranged on the inner side surfaces of the first metal groove wall 102 and the second metal groove wall 103; a feed probe 108 of the radio frequency connector 3 penetrates through the base 101 and the feed matching cavity 104 to be connected with the first metal groove wall 102, and the feed matching cavity 104 is communicated with the bottom of the involute groove 106.
The radio frequency connector 3 adopts an SSMP-JHD model.
The first antenna mounting and positioning part 110 is arranged on the left side of the base 101; a second antenna installation positioning part 111 is arranged at the intersection of the right side of the base 101 and the second metal groove wall 103; the antenna array mounting plate 2 is provided with a step mounting groove matched with the shape of the base 101, and the base 101 of the metal vivaldi antenna unit 1 is connected with the step mounting groove on the antenna array mounting plate 2 through welding.
The metal vivaldi antenna unit 1 and the antenna array mounting plate 2 are both made of brass materials.
The metallic vivaldi antenna element is functionally divided into three parts: feed portion, transmission portion and radiation portion. The metal vivaldi antenna unit is fed with electromagnetic energy from a feed part of the radio frequency connector and gradually spreads into a gradually opened groove with an increasing opening distance along a gap, the groove walls on two sides of the groove are equivalent to two poles, induced current mainly flowing along the edge of the groove is generated on the groove walls, and an electromagnetic field further spreads towards space along an end-fire direction. The feed part is positioned at the bottom of the antenna unit, a coaxial feed structure with a simple structure is adopted, the radio frequency connector is of an SSMP-JHD type, and the diameter of a feed probe is 0.3 mm; the transmission part is a feed matching cavity connected with the radiation part and the feed part, and the tail end of the transmission part is connected with the antenna resonant cavity; the radiation part is composed of metal groove lines with gradually changing indexes, and the two sides of the gradually opening groove are a first metal groove wall and a second metal groove wall which are of symmetrical structures.
As shown in fig. 3, nine arc line segment surfaces and nine straight line segment surfaces are arranged between the top end and the bottom of the outer side surfaces of the first metal slot wall and the second metal slot wall, so that the reactance in the whole operating frequency band of the antenna can be smoother, the resonance peak of standing waves in the frequency band can be prevented, the discontinuity of the tail end of the antenna unit can be reduced, and the matching performance of the antenna can be improved.
Example (b):
the thickness of the antenna array mounting plate is 3 mm; the antenna array mounting plate structure is processed by adopting a high-precision numerical control machine tool and is made of brass metal materials, two step mounting grooves are formed in the mounting position of each metal vivaldi antenna unit so as to be matched and positioned with the first antenna mounting positioning part and the second antenna mounting positioning part during welding, and the metal vivaldi antenna units are welded on the step mounting grooves of the antenna array mounting plate through a silver welding process.
The thickness of the metal vivaldi antenna unit is 3-3.5 mm, the length is 12-13 mm, and the width is 10-10.5 mm. The feed part is positioned in the metal vivaldi antenna base, an air cavity coaxial feed structure is adopted, the radio frequency connector is of an SSMP-JHD type, and the diameter of a feed probe is 0.3 mm.
The first antenna installation positioning portion and the second antenna installation positioning portion are located on the left side and the right side of the antenna unit and positioned through the two positioning surfaces, and the antenna unit can be accurately welded in the step mounting groove in the antenna array mounting plate.
The feed probe of the radio frequency connector is an inner conductor of the radio frequency connector SSMP-JHD, penetrates through a feed structure and a feed matching cavity of the antenna unit and then is welded on the antenna by using conductive adhesive.
The feed matching cavity is an important part for adjusting the impedance of the feed part, and the height of the feed matching cavity is 0.4-0.7 mm.
The antenna resonant cavity is of a circular structure and mainly plays a role in antenna impedance matching, and the diameter of the circle is 0.8-1.1 mm.
The exponential gradient slotline is an antenna radiation structure, and an involute slot between the left exponential gradient slotline and the right exponential gradient slotline plays a role in guiding electromagnetic wave radiation, wherein the ridge curve equation of the exponential gradient slotline is that y = α eβl+ kl, where l =12 mm-13 mm, k is between 0.02-0.04, α is between 0.2-0.23, β is between 0.25-0.3.
And optimizing the outer side structures of the first metal groove wall and the second metal groove wall, wherein a multi-section antenna outer edge curve structure is adopted. In the embodiment, nine sections of antenna outer edge curves are adopted, under the condition that other structures are not changed, the bandwidth of the antenna can be effectively widened after optimization, the matching characteristic of the antenna is improved, and particularly, when the antenna array is used for beam electric scanning, the active standing wave is obviously improved.
The multi-section antenna outer edge curve structure starts from the top of the first metal groove wall or the second metal groove wall and ends at the bottom of the first metal groove wall or the second metal groove wall. Sequentially arranging a first antenna outer edge curve 201 as an arc line section from bottom to top, wherein the arc radius is between 2.8mm and 3.5 mm; the outer edge curve 202 of the second antenna is an arc line segment, and the radius of the arc is 1.5 mm-1.7 mm; the outer edge curve 203 of the third antenna is a straight line segment, and the length of the straight line segment is 0.5 mm-0.7 mm; the outer edge curve 204 of the fourth antenna is an arc line segment, and the radius of the arc is 1.5 mm-1.7 mm; the curve 205 of the outer edge of the fifth antenna is an arc line segment, and the radius of the arc is 11 mm-12 mm; the sixth antenna outer edge curve 206 is an arc line segment, and the arc radius is between 1.4mm and 1.6 mm; the seventh antenna outer edge curve 207 is an arc line segment, and the arc radius is between 0.4mm and 0.6 mm; the curve 208 of the outer edge of the eighth antenna is a straight line segment, and the length of the straight line segment is 1 mm-1.1 mm; the ninth antenna outer edge curve 209 is a circular arc segment, and the radius of the circular arc is between 0.4mm and 0.5 mm.
In summary, according to the 6-18GHz 45-degree polarization metal vivaldi antenna array provided by the invention, the antenna units are all metal structures, are installed in 45-degree polarization, have simple feed structures, can flexibly expand or reduce the number of the array units, and can realize +/-45-degree large-angle beam scanning.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (9)
1. A 6-18GHz45 ° polarized metallic vivaldi antenna array comprising: metal vivaldi antenna element, antenna array mounting panel, radio frequency connector, its characterized in that: the metal vivaldi antenna units are welded on the antenna array mounting plate according to rectangular grid arrangement, and the polarization direction of the metal vivaldi antenna units is linear polarization of 45 degrees; and the radio frequency connector is connected with the bottom of each metal vivaldi antenna unit through a through hole on the antenna array mounting plate.
2. A 6-18GHz45 ° polarized metallic vivaldi antenna array as claimed in claim 1, wherein: the metallic vivaldi antenna element comprising: the feed matching cavity is arranged between the bottom of the first metal groove wall and the base; an antenna resonant cavity is arranged at the bottom of the first metal groove wall at the front end of the feed matching cavity; a gradual groove is arranged between the first metal groove wall and the second metal groove wall, and the inner side surfaces of the first metal groove wall and the second metal groove wall are provided with an index gradual groove line; a feed probe of the radio frequency connector penetrates through the base and the feed matching cavity to be connected with the wall of the first metal groove, and the feed matching cavity is communicated with the bottom of the involute groove.
3. A 6-18GHz45 ° polarized metallic vivaldi antenna array as claimed in claim 2, wherein: and a solder observation hole is formed in the wall of the first metal groove.
4. A 6-18GHz45 ° polarized metallic vivaldi antenna array as claimed in claim 1, wherein: the radio frequency connector 3 adopts an SSMP-JHD model.
5. A 6-18GHz45 ° polarized metallic vivaldi antenna array as claimed in claim 2, wherein: a first antenna mounting and positioning part is arranged on the left side of the base; a second antenna installation positioning part is arranged at the intersection of the right side of the base and the wall of the second metal groove; the antenna array mounting plate is provided with a step mounting groove matched with the shape of the base, and the base of the metal vivaldi antenna unit is connected with the step mounting groove on the antenna array mounting plate through welding.
6. A 6-18GHz45 ° polarized metallic vivaldi antenna array as claimed in claim 1, wherein: the metal vivaldi antenna unit and the antenna array mounting plate are both made of brass materials.
7. A 6-18GHz45 ° polarized metallic vivaldi antenna array as claimed in claim 2, wherein: and a plurality of sections of arc line section surfaces and straight line section surfaces are arranged between the top end and the bottom of the outer side surface of the first metal groove wall and/or the second metal groove wall.
8. A 6-18GHz45 ° polarized metallic vivaldi antenna array as claimed in claim 7, wherein: the first antenna outer edge curve is sequentially arranged from bottom to top from the top to the bottom of the first metal groove wall and/or the second metal groove wall and is set as an arc line segment, and the arc radius is between 2.8mm and 3.5 mm; the outer edge curve of the second antenna is set as a circular arc segment, and the radius of the circular arc is 1.5 mm-1.7 mm; the outer edge curve of the third antenna is set as a straight line segment, and the length of the straight line segment is 0.5 mm-0.7 mm; the outer edge curve of the fourth antenna is set as a circular arc segment, and the radius of the circular arc is 1.5 mm-1.7 mm; the outer edge curve of the fifth antenna is set as a circular arc line segment, and the radius of the circular arc is 11 mm-12 mm; the outer edge curve of the sixth antenna is set as a circular arc segment, and the radius of the circular arc is 1.4 mm-1.6 mm; the outer edge curve of the seventh antenna is set as a circular arc line segment, and the radius of the circular arc is 0.4 mm-0.6 mm; an eighth antenna outer edge curve is set as a straight line segment, and the length of the eighth antenna outer edge curve is 1 mm-1.1 mm; and the ninth antenna outer edge curve is set as a circular arc segment, and the radius of the circular arc is 0.4 mm-0.5 mm.
9. The 6-18GHz45 ° polarized metal vivaldi antenna array as claimed in claim 2, wherein the ridge curve equation of the exponential graded groove line is y = α eβl+ kl, where l =12 mm-13 mm, k is between 0.02-0.04, α is between 0.2-0.23, β is between 0.25-0.3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911379397.9A CN110994160A (en) | 2019-12-27 | 2019-12-27 | 6-18GHz 45-degree polarized metal vivaldi antenna array |
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| CN201911379397.9A CN110994160A (en) | 2019-12-27 | 2019-12-27 | 6-18GHz 45-degree polarized metal vivaldi antenna array |
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| CN110994160A true CN110994160A (en) | 2020-04-10 |
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Cited By (5)
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| CN112117551A (en) * | 2020-08-19 | 2020-12-22 | 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) | Ultra-wideband wide-angle scanning all-metal Vivaldi array antenna |
| CN112670698A (en) * | 2020-12-08 | 2021-04-16 | 南京长峰航天电子科技有限公司 | Metal Vivaldi antenna array |
| CN113644415A (en) * | 2021-07-18 | 2021-11-12 | 南京理工大学 | Ultra-wideband dual-polarized all-metal Vivaldi antenna unit and array antenna thereof |
| CN114243304A (en) * | 2021-12-03 | 2022-03-25 | 西北工业大学 | Two-unit all-metal Vivaldi circularly polarized antenna |
| RU216808U1 (en) * | 2022-09-07 | 2023-03-02 | Дмитрий Дмитриевич Алхимов | ANTENNA |
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| CN114243304A (en) * | 2021-12-03 | 2022-03-25 | 西北工业大学 | Two-unit all-metal Vivaldi circularly polarized antenna |
| RU216808U1 (en) * | 2022-09-07 | 2023-03-02 | Дмитрий Дмитриевич Алхимов | ANTENNA |
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Application publication date: 20200410 |
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