CN110176666A - A kind of large-angle scanning dual polarization dipole sub-antenna - Google Patents

A kind of large-angle scanning dual polarization dipole sub-antenna Download PDF

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Publication number
CN110176666A
CN110176666A CN201910403512.5A CN201910403512A CN110176666A CN 110176666 A CN110176666 A CN 110176666A CN 201910403512 A CN201910403512 A CN 201910403512A CN 110176666 A CN110176666 A CN 110176666A
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CN
China
Prior art keywords
antenna
metal
arm
metal arm
angle scanning
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Granted
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CN201910403512.5A
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Chinese (zh)
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CN110176666B (en
Inventor
方佳
张小林
金谋平
朱庆超
王放
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CETC 38 Research Institute
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CETC 38 Research Institute
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Priority to CN201910403512.5A priority Critical patent/CN110176666B/en
Publication of CN110176666A publication Critical patent/CN110176666A/en
Priority to JP2021500399A priority patent/JP7025596B2/en
Priority to EP20806225.7A priority patent/EP3819984A4/en
Priority to PCT/CN2020/090163 priority patent/WO2020228759A1/en
Application granted granted Critical
Publication of CN110176666B publication Critical patent/CN110176666B/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • H01Q21/26—Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/1207—Supports; Mounting means for fastening a rigid aerial element
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • 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

Abstract

The invention discloses a kind of large-angle scanning dual polarization dipole sub-antennas, belong to antenna technical field, including the first metal arm, antenna mounting column, the second metal arm and feed Balun, first metal arm is located at the top of antenna, for improving impedance fluctuations of the antenna in wide-angle scanning, the feed Balun is located at the bottom of antenna, and the unbalanced feed for inputting coaxial line is converted to balanced feeding.The present invention substantially improves the impedance matching when scanning of antenna wide-angle, effectively increases the performance of antenna large-angle scanning；Meanwhile making antenna that there is good cross-polarization performance；Finally, since metal dipole arm and top metal arm are all made of longitudinal blade-shaped bending structure, cross-sectional area is minimum, is not easy accumulated snow, product rain, the influence to antenna performance and service life such as accumulated snow, product rain is significantly reduced, the severe weather conditions such as heavy rainfall, heavy snowfall can be perfectly suitable for.

Description

A kind of large-angle scanning dual polarization dipole sub-antenna
Technical field
The present invention relates to antenna technical fields, and in particular to a kind of large-angle scanning dual polarization dipole sub-antenna.
Background technique
Antenna is one of most important component of the systems such as radio broadcasting, wireless communication and wireless exploration, structure and characteristic Largely determine the working performance of whole system.Phased array antenna is because it is with outstanding beam scanning and wave beam tax Shape ability becomes the important developing direction of modern antennas.The systems such as radar, communication often require that phased array antenna has wide work Make the characteristics such as frequency band, wide angle scanning, low return loss；Antenna in some particular applications needs to have relatively strong toward contact Environmental suitability, to adapt to severe operating condition.
Dual polarized antenna is made of two mutually orthogonal antennas of polarization, is obtained in the systems such as modern radar, communication wide General application.Common dual polarized antenna form has microstrip antenna, dipole antenna, Vivaldi antenna etc..It is mutually orthogonal by two The dual polarized antenna of cross type that constitutes of dipole antenna, have that broader bandwidth, that difficulty of processing is low, reliability is high etc. is excellent Point is commonly used for the group array element of dual polarization phased array.
But violent variation can occur for the impedance when wide-angle scans of traditional dual polarization dipole sub-antenna, and then cause to hinder Anti- mismatch causes serious return loss.At extremely ± 60 ° of scanning, antenna element return loss is often as high as -6dB.Another party Face is often faced with complicated working environment and exceedingly odious weather, such as by force for the antenna in some particular applications Rainfall, heavy snowfall etc..Traditional dual polarization dipole sub-antenna often has wider cross-sectional area, is easy accumulated snow, greatly shadow The operable time of antenna is rung.
Summary of the invention
Technical problem to be solved by the present invention lies in: how to realize low return loss large-angle scanning and meet heavy rainfall, Work requirements under the exceedingly odious weather such as heavy snowfall provide a kind of large-angle scanning dual polarization dipole sub-antenna.
The present invention is that solution above-mentioned technical problem, the present invention include the first metal arm, antenna by the following technical programs Support column, the second metal arm and feed Balun；
First metal arm is located at the top of antenna, for improving impedance fluctuations of the antenna in wide-angle scanning；
The feed Balun is located at the bottom of antenna, and the unbalanced feed for inputting coaxial line is converted to balance feedback Electricity；
The antenna mounting column is used to support the first metal arm between feed Balun and the first metal arm；
The outer upper ends of feed Balun are arranged in second metal arm, are fed respectively to it by feed Balun；
First metal arm is longitudinal cross blade-shaped metal arm, and second metal arm is longitudinal blade-shaped metal pair Extremely sub- arm, first metal arm and the second metal arm include horizontal part and bending part, and the horizontal part and bending part are one Body formed component.The cross-sectional area of the metal arm of above-mentioned shape is small, is not easy long-pending sleet, so that the whole stronger wind resistance, anti-of antenna Sleet ability is adapted to exceedingly odious weather and complicated working environment；By using longitudinal cross blade-shaped metal arm, day Impedance fluctuations of the line when wide-angle scans are improved.
Preferably, the quantity of second metal arm is two groups, and totally four, the second metal arm described in two groups is in symmetrical point Cloth.
Preferably, the antenna uses symmetrical structure in structure, two polarization direction is mutually orthogonal.
Preferably, the quantity of the feed Balun is two groups, and feed Balun described in two groups is mutually orthogonal, so just can be square Just the dipole arm mutually orthogonal to two groups of polarization directions is fed respectively.
Preferably, feed Balun described in every group includes coaxial line, grounded metal column, metal bridge and medium pedestal, the gold Belong to bridge to be arranged on medium pedestal, the upper end of coaxial line Yu grounded metal column is arranged in the medium pedestal, and the metal bridge is used In connection coaxial line and grounded metal column.
Preferably, feed Balun described in every group further includes multiple dielectric support columns, and the coaxial line includes coaxial inner conductor With coaxial outer conductor, the coaxial inner conductor is located at the inside of coaxial outer conductor, and multiple dielectric support columns are separately positioned on The outside of coaxial inner conductor, the coaxial inner conductor are fixed by dielectric support column.
Preferably, parallel wire structure, the second gold medal described in two groups are constituted between the coaxial outer conductor and grounded metal column Category arm, which is respectively welded, to be fixed on coaxial outer conductor and grounded metal column, is fed by parallel wire structure.
Preferably, the bending part is bent downwards, and the bending place angle of second metal arm and the first metal arm are protected It holds unanimously, bending can play guide functions to sleet downwards.
The present invention has the advantage that the large-angle scanning dual polarization dipole sub-antenna compared with prior art, substantially improves Impedance matching when antenna wide-angle scans, effectively increases the performance of antenna large-angle scanning, within the scope of 208MHz-260MHz Voltage standing wave ratio is less than 1.5 when realizing ± 60 ° of large-angle scannings, and scanning, and opposite conventional dipole sub-antenna is wide at ± 60 ° Voltage standing wave ratio has obtained good inhibition when angle sweep；Meanwhile antenna has good cross-polarization performance, cross polarization electricity It is flat to be lower than -25dB；Finally, due to metal dipole arm and top metal arm are all made of longitudinal blade-shaped bending structure, it is transversal Area is minimum, is not easy accumulated snow, product rain, significantly reduces the influence to antenna performance and service life such as accumulated snow, product rain, particularly suitable In severe weather conditions such as heavy rainfall, heavy snowfalls.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is partial exploded view of the invention；
Fig. 3 is the side sectional view of Fig. 1 of the invention；
Fig. 4 is the top view of Fig. 1 of the invention；
Voltage standing wave ratio schematic diagram when Fig. 5 is antenna scanning；
Fig. 6 is Cross polarization pattern of the antenna on 230MHz frequency point.
In figure: 1, the first metal arm；2, antenna mounting column；3, the second metal arm；4, feed Balun；41, coaxial inner conductor； 42, coaxial outer conductor；43, grounded metal column；44, dielectric support column；45, metallic screw；46, metal bridge；47, medium pedestal.
Specific embodiment
It elaborates below to the embodiment of the present invention, the present embodiment carries out under the premise of the technical scheme of the present invention Implement, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to following implementation Example.
As shown in Figure 1, the present embodiment provides a kind of technical solutions: a kind of large-angle scanning dual polarization dipole sub-antenna, including First metal arm 1, antenna mounting column 2, the second metal arm 3 and feed Balun 4；
First metal arm 1 is located at the top of antenna, for improving impedance fluctuations of the antenna in wide-angle scanning；
Feed Balun 4 is located at the bottom of antenna, and the unbalanced feed for inputting coaxial line is converted to balanced feeding；
Antenna mounting column 2 is located between feed Balun 4 and the first metal arm 1, is used to support the first metal arm 1；
The outer upper ends of feed Balun 4 are arranged in second metal arm 3, are fed respectively to it by feed Balun 4；
First metal arm 1 is longitudinal cross blade-shaped metal arm, and the first metal arm 1 is parasitic element, without feeding, the Two metal arms 3 are longitudinal blade-shaped metal dipole arm, and the first metal arm 1 and the second metal arm 3 include horizontal part and bending Portion, horizontal part and bending part are integrally formed component, and bending part is bent downwards, the bending place angle of second metal arm with First metal arm is consistent, and bending can play guide functions, the cross section of the metal arm of above-mentioned shape to sleet downwards Product is small, is not easy long-pending sleet, so that antenna integrally stronger wind resistance, anti-sleet ability, are adapted to exceedingly odious weather and complexity Working environment；By using longitudinal cross blade-shaped metal arm, impedance fluctuations of the antenna when wide-angle scans are improved.
The working frequency of antenna is 208MHz~260MHz, and polarization mode is horizontal polarization and vertical polarization, antenna element Grid arrangement triangular in shape, horizontal polarization directions antenna element spacing is 740mm, and vertical polarization directions antenna element spacing is 640mm；When the practical triangle grid of antenna progress is structured the formation, horizontal and vertical number of unit can be expanded according to actual needs Exhibition, likewise, antenna can also according to actual needs, rectangular grid is structured the formation, annulus is structured the formation or is structured the formation using other types for progress Mode.
First metal arm 1 includes two mutually orthogonal longitudinal blade-shaped metal arms, the transverse direction of longitudinal blade-shaped metal arm Length is 370mm, and longitudinal height is 106mm, and with a thickness of 3mm, 2 upper end of antenna mounting column, metal arm 1 and antenna mounting column is arranged It is fixed between 2 using modes such as screws；Antenna mounting column 2 selects the polytetrafluoroethylene (PTFE) material of dielectric constant Dk=2.1, antenna branch The maximum gauge of dagger 2 is 95mm, is highly 45mm, is arranged in feed Balun 4, between antenna mounting column 2 and feed Balun 4 It is fixed using modes such as screws.
As in Figure 2-4, the quantity of feed Balun 4 is two groups, and two groups of feed Baluns 4 are mutually orthogonal, so just can be square Just the dipole arm mutually orthogonal to two groups of polarization directions is fed respectively；Every group of feed Balun 4 includes coaxial line, ground connection Metal column 43, metal bridge 46 and medium pedestal 47, metal bridge 46 are arranged on medium pedestal 47, are divided by four pieces of metallic screws 45 Not Gu Ding, medium pedestal 47 is arranged in the upper end of coaxial line Yu grounded metal column 43, and metal bridge 46 is for connecting coaxial line and connecing Ground metal column 43；Every group of feed Balun 4 further includes multiple dielectric support columns 44, coaxial line include coaxial inner conductor 41 with it is coaxial outer Conductor 42, coaxial inner conductor 41 are located at the inside of coaxial outer conductor 42, and multiple dielectric support columns 44 are separately positioned in coaxial and lead The outside of body 41；Parallel wire structure is constituted between coaxial outer conductor 42 and grounded metal column 43, two group of second metal arm 3 is distinguished It is weldingly fixed on coaxial outer conductor 42 and grounded metal column 43, is fed by parallel wire structure.
It should be noted that coaxial outer conductor 42 and 43 positional symmetry of grounded metal column, size is identical, and diameter is (coaxial outer 42 outer diameter of conductor) it is 28.08mm, it is highly 423.7mm, between the two away from for 25.86mm, coaxial outer conductor 42 can regard one as A hollow metal sleeve, internal diameter 24mm, coaxial inner conductor 41 are located at 42 center of coaxial outer conductor, height and coaxial outer conductor 42 is equivalent, fixed by the dielectric support column 44 of polytetrafluoroethylene (PTFE) material.41 diameter of coaxial inner conductor according to impedance convert demand and Whether inner conductor passes through dielectric support column 44 and determines, maximum gauge 10mm, minimum diameter 4.774mm, coaxial inner conductor 41 bottoms connection coaxial radio-frequency connector is fed；
46 overall length of metal bridge is 64mm, width 10mm, metal bridge 46 and coaxial outer conductor 42 and grounded metal column 43 it Between minimum spacing be 9mm.The both arms of longitudinal blade-shaped metal dipole arm are respectively welded at coaxial outer conductor 42 and ground connection gold Belong to the outer tip end of column 43, successively by coaxial outer conductor 42 and 43 structure of coaxial inner conductor 41- metal bridge 46- grounded metal column into Row feed.Each dipole arm lateral length is 190mm, and longitudinal height is 238mm, with a thickness of 3mm；
Antenna mounting column 2, dielectric support column 44 and medium pedestal 47 use polytetrafluoroethylene (PTFE) material, remaining structure is using gold Belong to material to be processed, longitudinal cross blade-shaped metal arm significantly improves impedance matching when antenna scanning, increases cross Blade-shaped metal arm is substantially the resonance for introducing capacitor and inductance in the equivalent circuit of antenna and then changing when wide-angle scans Point and impedance, blade type metal arm configuration then provide stronger wind resistance snow ability, are suitable for exceedingly odious weather environment.
As shown in figure 5, horizontal polarization and vertical polarization be when the face E/face ± 60 ° H are scanned, in 208MHz-260MHz range Interior voltage standing wave ratio is respectively less than 1.5, realizes the large-angle scanning process of low return loss.
As shown in fig. 6, the face E of the antenna/face H directional diagram deteriorates in bandwidth without obvious, cross polarization level lower than- 25dB。
In conclusion the large-angle scanning dual polarization dipole sub-antenna of the present embodiment, substantially improves the scanning of antenna wide-angle When impedance matching, effectively increase the performance of antenna large-angle scanning, realized within the scope of 208MHz-260MHz ± 60 ° wide Angle sweep, and voltage standing wave ratio is less than 1.5 when scanning, opposite conventional dipole sub-antenna, in ± 60 ° of large-angle scannings, voltage is stayed Bobbi has obtained good inhibition；Meanwhile antenna has good cross-polarization performance, cross polarization level is lower than -25dB；Most Afterwards, since metal dipole arm and top metal arm are all made of longitudinal blade-shaped bending structure, cross-sectional area is minimum, is not easy to accumulate Snow, product rain significantly reduce the influence to antenna performance and service life such as accumulated snow, product rain, especially suitable for heavy rainfall, heavy snowfall Application under equal severe weather conditions.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.

Claims (8)

1. a kind of large-angle scanning dual polarization dipole sub-antenna, including the first metal arm, antenna mounting column, the second metal arm and feed Balun；
First metal arm is located at the top of antenna, for improving impedance fluctuations of the antenna in wide-angle scanning；
The feed Balun is located at the bottom of antenna, and the unbalanced feed for inputting coaxial line is converted to balanced feeding；
The antenna mounting column is used to support the first metal arm between feed Balun and the first metal arm；
Second metal arm is arranged in feed Balun, is fed by feed Balun to it；
First metal arm is longitudinal cross blade-shaped metal arm, and second metal arm is longitudinal blade-shaped metal dipole Arm, first metal arm and the second metal arm include horizontal part and bending part, and the horizontal part and bending part are integrated into Type component.
2. a kind of large-angle scanning dual polarization dipole sub-antenna according to claim 1, it is characterised in that: second metal The quantity of arm is two groups, and totally four, the polarization direction of the second metal arm described in two groups is mutually orthogonal, and it is symmetric.
3. a kind of large-angle scanning dual polarization dipole sub-antenna according to claim 1, it is characterised in that: the antenna is being tied Symmetrical structure is used on structure, two polarization direction is mutually orthogonal.
4. a kind of large-angle scanning dual polarization dipole sub-antenna according to claim 2, it is characterised in that: the feed Balun Quantity be two groups, feed Balun described in two groups is mutually orthogonal, for the metal dipole mutually orthogonal to two groups of polarization directions Arm is fed respectively.
5. a kind of large-angle scanning dual polarization dipole sub-antenna according to claim 4, it is characterised in that: fed described in every group Balun includes coaxial line, grounded metal column, metal bridge and medium pedestal, and the metal bridge is arranged on medium pedestal, is given an account of The upper end of coaxial line Yu grounded metal column is arranged in matter pedestal, and the coaxial line is connect with grounded metal column by metal bridge.
6. a kind of large-angle scanning dual polarization dipole sub-antenna according to claim 5, it is characterised in that: fed described in every group Balun further includes multiple dielectric support columns, and the coaxial line includes coaxial inner conductor and coaxial outer conductor, the coaxial inner conductor Positioned at the inside of coaxial outer conductor, multiple dielectric support columns are separately positioned on the outside of coaxial inner conductor, described coaxial interior Conductor is fixed by dielectric support column.
7. a kind of large-angle scanning dual polarization dipole sub-antenna according to claim 6, it is characterised in that: described coaxially to lead outside Body and grounded metal column constitute parallel wire structure, and the second metal arm described in two groups is separately fixed at coaxial outer conductor and ground connection gold Belong on column, is fed by parallel wire structure.
8. a kind of large-angle scanning dual polarization dipole sub-antenna according to claim 1, it is characterised in that: the bending part to Lower section bending, bending place angle and the first metal arm of second metal arm are consistent.
CN201910403512.5A 2019-05-15 2019-05-15 Wide-angle scanning dual-polarized dipole antenna Active CN110176666B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201910403512.5A CN110176666B (en) 2019-05-15 2019-05-15 Wide-angle scanning dual-polarized dipole antenna
JP2021500399A JP7025596B2 (en) 2019-05-15 2020-05-14 Double polarization dipole antenna for wide-angle scanning
EP20806225.7A EP3819984A4 (en) 2019-05-15 2020-05-14 Wide-angle scanning dual-polarized dipole antenna
PCT/CN2020/090163 WO2020228759A1 (en) 2019-05-15 2020-05-14 Wide-angle scanning dual-polarized dipole antenna

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CN201910403512.5A CN110176666B (en) 2019-05-15 2019-05-15 Wide-angle scanning dual-polarized dipole antenna

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CN110176666B CN110176666B (en) 2020-09-25

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WO2020228759A1 (en) * 2019-05-15 2020-11-19 中国电子科技集团公司第三十八研究所 Wide-angle scanning dual-polarized dipole antenna
CN112563716A (en) * 2020-11-18 2021-03-26 中国电子科技集团公司第三十八研究所 High-gain large-angle scanning cross antenna

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CN105762508A (en) * 2016-03-23 2016-07-13 重庆邮电大学 Broadband dual-polarized mobile base station antenna unit equipped with metallic pillars
CN206441871U (en) * 2016-11-08 2017-08-25 深圳市普方众智精工科技有限公司 Dual-band and dual-polarization omnidirectional antenna
JP2018129604A (en) * 2017-02-07 2018-08-16 株式会社Ｎｔｔドコモ Dual polarized antenna and antenna system
CN107293863A (en) * 2017-05-03 2017-10-24 西安电子科技大学 A kind of broad beam broadband dual polarized antenna
US20190140364A1 (en) * 2017-07-18 2019-05-09 The Board Of Regents Of The University Of Oklahoma Dual-Linear-Polarized, Highly-Isolated, Crossed-Dipole Antenna and Antenna Array
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Cited By (3)

* Cited by examiner, † Cited by third party
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WO2020228759A1 (en) * 2019-05-15 2020-11-19 中国电子科技集团公司第三十八研究所 Wide-angle scanning dual-polarized dipole antenna
CN111446541A (en) * 2020-04-10 2020-07-24 航天恒星科技有限公司 Cross-shaped array circularly polarized antenna
CN112563716A (en) * 2020-11-18 2021-03-26 中国电子科技集团公司第三十八研究所 High-gain large-angle scanning cross antenna

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EP3819984A1 (en) 2021-05-12
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CN110176666B (en) 2020-09-25
WO2020228759A1 (en) 2020-11-19
EP3819984A4 (en) 2022-04-20

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