CN106450738B - High-gain double-circle polarization plate aerial - Google Patents
High-gain double-circle polarization plate aerial Download PDFInfo
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- CN106450738B CN106450738B CN201611063503.9A CN201611063503A CN106450738B CN 106450738 B CN106450738 B CN 106450738B CN 201611063503 A CN201611063503 A CN 201611063503A CN 106450738 B CN106450738 B CN 106450738B
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- circle
- gap
- radial line
- waveguide
- array
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Abstract
The present invention provides a kind of high-gain double-circle polarization plate aerial, comprising: metal profile, the waveguide of single layer radial line, feeding network, radial line waveguide top surface are equipped with radiating slot array；Radiating slot array includes the annular slot of multiple concentric, and every loop lap gating system is successively rotated around the center of circle of array identical angle duplication in the same direction by the gap of a linear polarization and obtained, and annular slot is equipped at radial line waveguide top surface center as matching annulus；4 coaxial probes are distributed on the circumference of matching annulus internal concentric, feeding network is made of Wilkinson power divider and the cascade of branch line hybrid network, the invention avoids huge feed function separation structures, it is lost small, antenna efficiency is high, realizes that double-circle polarization design, structure are more simple small and exquisite using single layer radial line waveguide, in required frequency range, the present invention has stable antenna pattern, extremely low cross polarization level, good return loss and receive-transmit isolation.
Description
Technical field
The invention belongs to the technical field of antenna in radio communication system design, especially a kind of high-gain double-circle polarization is flat
Plate antenna.
Background technique
The twentieth century later period eighties, radial line slot antenna (Radial Line Slot Antennas, RLSA) conduct
The high-gain satellite earth antenna of Ku wave band and be suggested, it has had both the high efficiency of Waveguide slot antenna and microstrip antenna is low cuts open
The advantages of face.
From the higher mode right-angled intersection gap annular array of early stage, orthogonal gap array is filled to two-layered medium, then arrive single
The orthogonal gap array of layer media filler, researchers have carried out continuous improvement, making property to the structure of radial line slot antenna
It can reach approximately horizontal with waveguide gap array.It is widely used in DBS direct satellite broadcasting TV receive-transmit system, and in high speed
Wireless access, point to point link, vehicle anticollision radar and high power field of array antennas obtain application.
In satellite communication system, in order to efficiently use stationary orbit and frequency spectrum resource, exist in certain division of period orbit
Frequency recycling, this will be generated interfering with each other for signal in effective bandwidth, needs to be received using different polarization modes thus
It signals.Therefore, design one it is secondary be able to achieve the received high-gain aerial of left-handed or right-handed circular polarization in same frequency range and become defend
Necessity in star communication.Hideki Ueda in 2013 et al. is realized using 180 ° of E shape elbow connection two layers of radial line waveguides
The design of double-circle polarization, but structure is complicated, difficulty of processing is big, therefore the dual circularly polarized antenna of single layer radial line waveguiding structure is just
Seem advantageous.
Summary of the invention
The purpose of the present invention is to provide a kind of high-gain double-circle polarization plate aerials, it works in Ku wave band, including list
Layer radial line waveguide and microstrip feed network.
For achieving the above object, technical solution of the present invention is as follows:
A kind of high-gain double-circle polarization plate aerial, comprising: metal profile, the single layer being fixed on above metal profile
Radial line waveguide, the feeding network being fixed below metal profile, radial line waveguide top surface is equipped with to be covered through waveguide surface
The radiating slot array of layers of copper；
The radiating slot array includes the annular slot of multiple concentric, every loop gap by a linear polarization gap
It successively rotates identical angle duplication in the same direction around the center of circle of array and obtains, the gap of each circle uniformly arranges on the circle of place, phase
Angle=360 degree that adjacent gap successively rotates/each circle gap number, the gap size on same circle is identical, from inner ring to
The size in outer ring gap is gradually increased；
It is gradually increased from inner ring to the size in outer ring gap, is to obtain maximum gain to obtain uniform Aperture field distribution.
It is equipped with one at radial line waveguide top surface center and runs through the annular slot of waveguide surface copper clad layers as matching annulus；
4 coaxial probes are uniformly distributed on the circumference of matching annulus internal concentric, and 4 coaxial probes are used for radial direction
Line waveguide feed, coaxial probe one end goed deep into radial line waveguide by location hole, the other end by location hole is welded in feed
On the output port of network；
Feeding network is made of Wilkinson power divider and the cascade of branch line hybrid network, two of them Wilkinson function point
There are four output port, two input ports of branch line hybrid network to be connected respectively to two Wilkinson power dividers for utensil
On output port；Two sub-miniature A connectors are separately connected the input terminal of the Wilkinson power divider of feeding network.
It is preferred that being divided into the wavelength of 0.6 radial line waveguide between every circle adjacent slits, it is divided between described
The distance between each gap midpoint.Being spaced 0.6 wavelength is in order to avoid graing lobe and to reduce the mutual coupling between gap；
It is preferred that the radiating slot array includes the concentric annular slot of 5 circles.Gap array is enclosed in setting 5
In order to obtain the gain of required 24dBi or so.
It is preferred that left-hand circular polarization feed sub-miniature A connector, right-handed circular polarization feed sub-miniature A connector are separately connected feed
The input terminal of the Wilkinson power divider of network in this way feeds entire antenna.
It is preferred that the acute angle of each gap and the radial line issued from the radiating slot array center of circle is 43-
47 degree.The gain of left-hand circular polarization and right-handed circular polarization can be made roughly the same in this way.
It is preferred that being equipped with the cavity of protrusion below metal profile, feeding network is fixed on by metallic screw
The cavity bottom.It is to feed sub-miniature A connector, right-handed circular polarization for the ease of installation feeding network and for left-hand circular polarization in this way
Enough enough spaces are stayed in the welding of feed sub-miniature A connector.
It is preferred that 4 coaxial probes are uniformly distributed in the circumference of the concentric circles of matching annulus inner radial 5mm
On.Required stable field mode can have been motivated in radial line waveguide in this way.
It is preferred that the upper surface of metal profile is fixed in radial line waveguide by plastic screw.Such diameter
It plays a supporting role to line waveguide, prevents radial line waveguide from deforming because of external force；
It is preferred that the annular slot of adjacent turn is a radial direction along the spacing of the radial direction in the gap array center of circle
The wavelength of line waveguide, so as to radiation energy in-phase stacking, the spacing refers to the distance between adjacent slits midpoint.
Traditional double-circle polarization radial line slot antenna using the double-deck waveguiding structure, the present invention in order to simplify antenna structure,
Using single layer radial line waveguide, by the gap array radiated electromagnetic wave for opening annular arrangement in upper surface.Different from traditional diameter
To line slot antenna using two mutually orthogonal gaps to as radiating element, the present invention is made using the single gap of linear polarization
For radiating element, this element is obtained into annular slot array along center swivel replication, passes through sequence rotation technique (Sequential
Rotation Technique) realize circularly polarised wave radiation.
The present invention uses four probes to radial line waveguide feed, with branch line hybrid network (branch-line
Hybrid) it is unit, according to Bulter matrix design feeding network, controls probe feed phase, generate respectively in the waveguide suitable
Hour hands rotate field mode and counterclockwise rotation field mode, to realize double-circle polarization RLSA by single layer radial line waveguiding structure
Design.
The present invention opens an annular slot at radial line waveguide top surface center to improve Antenna Impedance Matching bandwidth,
Impedance matching is adjusted in a manner of loading capacitance, has widened bandwidth.
The invention has the following advantages:
(1) compared with conventional double-circle polarization microstrip antenna, present invention leaky-pipe form radiated electromagnetic wave is avoided
Small, antenna efficiency height is lost in huge feed function separation structure.
(2) compared with conventional double-circle polarization radial line slot antenna, the present invention is realized double using the waveguide of single layer radial line
Circular polarisation design, structure is more simple small and exquisite, and easy processing is at low cost.
(3) antenna impedance has effectively been widened as matching annulus in the radial waveguide upper surface center annular gap Chu Kaiyi
Coupling bandwidth.
(4) in required frequency range, the present invention has stable antenna pattern, extremely low cross polarization level, good
Return loss and receive-transmit isolation.
Detailed description of the invention
Fig. 1 is the top view of structure of the invention；
Fig. 2 is the side view of structure of the invention；
Fig. 3 is bottom view of the invention；
Fig. 4 is feed network structures figure of the invention；
Fig. 5 (a) is the main polarization and Cross polarization pattern in the face antenna left-hand circular polarization E；
Fig. 5 (b) is the main polarization and Cross polarization pattern in the face antenna left-hand circular polarization H；
Fig. 6 (a) is the main polarization and Cross polarization pattern in the face antenna right-handed circular polarization E；
Fig. 6 (b) is the main polarization and Cross polarization pattern in the face antenna right-handed circular polarization H；
Fig. 7 be the face antenna left-hand circular polarization E, the face H axis compare directional diagram；
Fig. 8 be the face antenna right-handed circular polarization E, the face H axis compare directional diagram；
Fig. 9 is antenna ends oral reflex charts for finned heat；
Figure 10 is antenna ends mouth isolation curve graph；
Figure 11 is the gain of antenna with the change curve of frequency；
Figure 12 is the axis of antenna than the change curve with frequency.
Wherein 1 is radial line waveguide, and 2 be radiating slot array, and 3 be matching annulus, and 4 be coaxial probe, and 5 be plastic spiral
Nail, 6 be metal profile, and 7 be feeding network, and 8 feed sub-miniature A connector for left-hand circular polarization, and 9, which feed SMA for right-handed circular polarization, connects
Head, 10 be metallic screw, and 11 be Wilkinson power divider, and 12 be branch line hybrid network.
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
Traditional double-circle polarization radial line slot antenna using the double-deck waveguiding structure, the present invention in order to simplify antenna structure,
Using single layer radial line waveguide, by the gap array radiated electromagnetic wave for opening annular arrangement in upper surface.
Different from traditional RLSA antenna using two mutually orthogonal gaps to as radiating element, the present invention uses line
Polarized single gap obtains an annular gap battle array along center swivel replication as radiating element, by this element, passes through sequence
The radiation of rotation technique (Sequential Rotation Technique) realization circularly polarised wave.
As shown in Figure 1-3, the high-gain double-circle polarization plate aerial of the present embodiment includes: metal profile 6, is fixed on gold
The feeding network 7 for belonging to the single layer radial line waveguide 1 of the top of support plate 6, being fixed on 6 lower section of metal profile, in radial line waveguide 1
Surface is equipped with the radiating slot array 2 through waveguide surface copper clad layers；
The radiating slot array 2 includes the 5 concentric annular slots of circle, every loop gap by a linear polarization gap
It successively rotates identical angle duplication in the same direction around the center of circle of array and obtains, the gap of each circle uniformly arranges on the circle of place, phase
Angle=360 degree that adjacent gap successively rotates/each circle gap number, the gap size on same circle is identical, from inner ring to
The size in outer ring gap is gradually increased；
It is gradually increased from inner ring to the size in outer ring gap, keeps the energy coupled by paracentral gap from waveguide slightly weak,
The energy coupled by the gap of proximal edge from waveguide is slightly strong, to achieve the effect that uniform Aperture distribution, obtains maximum gain.
It is equipped with one at 1 upper surface center of radial line waveguide and runs through the annular slot of waveguide surface copper clad layers as matching annulus
3；Impedance matching is adjusted in a manner of loading capacitance, has widened bandwidth.
4 coaxial probes 4 are uniformly distributed on the circumference of the concentric circles of matching 3 inner radial 5mm of annulus, in this way can be in diameter
Required stable field mode has been motivated in line waveguide.4 coaxial probes 4 are used to feed radial line waveguide 1, coaxial probe
4 one end are goed deep into radial line waveguide 1 by location hole, the other end is welded on the output port of feeding network 7 by location hole；
The present invention uses four coaxial probes to radial line waveguide feed, with branch line hybrid network (branch-line
Hybrid) it is unit, according to Bulter matrix design feeding network, controls probe feed phase, generate respectively in the waveguide suitable
Hour hands rotate field mode and counterclockwise rotation field mode, to realize double-circle polarization RLSA by single layer radial line waveguiding structure
Design.
As shown in figure 4, feeding network 7 is made of Wilkinson power divider 11 and the cascade of branch line hybrid network 12, wherein
There are four output port, two input ports of branch line hybrid network 12 are connected respectively to two tools of Wilkinson power divider 11
On the output port of two Wilkinson power dividers 11；Left-hand circular polarization feeds sub-miniature A connector 8, right-handed circular polarization feeds sub-miniature A connector
9 are separately connected the input terminal of the Wilkinson power divider 11 of feeding network, feed in this way to entire antenna.
Microstrip line be printed in a thickness of 0.254mm, relative dielectric constant be 2.2 dielectric-slab on, when signal is by left-handed circle
When polarization feed sub-miniature A connector 8 inputs, by Wilkinson power divider 11 and branch line hybrid network 12, four tunnels output letter is obtained
Number, four road phase of output signal successively decrease in 90 ° clockwise, are fed by coaxial probe 4 to radial waveguide 1, are motivated in the waveguide
Rise and rotate clockwise field mode --- two spaces, time orthogonal TM11 mode combinations.Along the circumferential direction field amplitude is equal,
Along the circumferential direction there is linear change in phase, therefore the circular lap gating system of waveguide top surface radiates left-hand circular polarization wave；Work as signal
When being inputted by right-handed circular polarization feed sub-miniature A connector 9, four road phase of output signal successively decrease in 90 ° counterclockwise, pass through coaxial probe 4
Rotation field mode counterclockwise is motivated in radial waveguide 1, therefore the annular slot battle array of waveguide top surface radiates right-handed circular polarization wave.
The selection of 1 thickness of radial line waveguide should ensure that the electromagnetic wave that transmission is single in waveguide, taken in the present embodiment with a thickness of
5mm。
Since nearby there are higher modes for radial line waveguide core, in order to reduce the influence of higher mode, first lap gap array
Apart from one waveguide wavelength of feeding point.The annular slot of adjacent turn is one along the spacing of the radial direction in 2 center of circle of gap array
The wavelength of radial line waveguide 1, so as to radiation energy in-phase stacking.
It is divided into the wavelength of 0.6 radial line waveguide 1 between every circle adjacent slits, each gap midpoint is divided between described
The distance between.Being spaced 0.6 wavelength is in order to avoid graing lobe and to reduce the mutual coupling between gap；Between every circle adjacent slits
Interval can according to actual gap arrange arbitrarily choose, only need to meet inhibit graing lobe condition.
5 circle gap array of the present embodiment setting is the gain in order to obtain required 24dBi or so.
The acute angle of each gap of the present embodiment and the radial line issued from 2 center of circle of radiating slot array is 43-47 degree.
The gain of left-hand circular polarization and right-handed circular polarization can be made roughly the same in this way.
The cavity of protrusion is equipped with below the present embodiment metal profile 6, feeding network 7 is fixed on institute by metallic screw 10
State cavity bottom.It is to feed sub-miniature A connector 8, right-handed circular polarization for the ease of installation feeding network 7 and for left-hand circular polarization in this way
Enough enough spaces are stayed in the welding of feed sub-miniature A connector 9.Left-hand circular polarization feed sub-miniature A connector 8 and right-handed circular polarization feed SMA connect
First 9, using 50 ohm of sub-miniature A connectors being commonly used in microwave communication, can directly be connected with signal generator or receiver.
The upper surface of metal profile 6 is fixed in radial line waveguide 1 by plastic screw 5.Radial line waveguide 1 is risen in this way
To supporting role, prevent radial line waveguide 1 from deforming because of external force；
By above design, which is 200mm, and a height of 12mm, working frequency is in 12GHz.
From Fig. 5 (a), (b) as it can be seen that antenna left-hand circular polarization maximum gain is 24.16dBi；
From Fig. 6 (a), (b) as it can be seen that antenna right-handed circular polarization maximum gain is 24.31dBi；
From fig.7, it can be seen that antenna left-hand circular polarization axis ratio is 0.43dB；
As seen from Figure 8, antenna right-handed circular polarization axis ratio is 0.19dB；
As seen from Figure 9, left-hand circular polarization feed sub-miniature A connector 8, right-handed circular polarization feed 9 reflection coefficient of sub-miniature A connector are being observed
Frequency range in below -10dB, bandwidth is more than 16.6%；
As seen from Figure 10, the isolation between left-hand circular polarization feed sub-miniature A connector 8, right-handed circular polarization feed sub-miniature A connector 9
- 10dB, bandwidth 7.4% are below within the scope of 11.2GHz-12.35GHz；
As can be seen from figure 11 that the 3dB gain bandwidth of left and right hand circular polarization wave is very wide, it is greater than 13%；
From Figure 12 as it can be seen that the axis of left and right hand circular polarization wave is more fine than performance, the axial ratio bandwidth of AR < 3dB is more than
16%；
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, all those of ordinary skill in the art are completed without departing from the spirit and technical ideas disclosed in the present invention
All equivalent modifications or change, should be covered by the claims of the present invention.
Claims (8)
1. a kind of high-gain double-circle polarization plate aerial characterized by comprising metal profile (6) is fixed on metal support
Single layer radial line waveguide (1) above plate (6), the feeding network (7) being fixed below metal profile (6), radial line waveguide
(1) upper surface is equipped with the radiating slot array (2) through waveguide surface copper clad layers；The radiating slot array (2) includes multi-turn
Concentric annular slot, every loop gap successively rotate identical angle around the center of circle of array by the gap of a linear polarization in the same direction
Degree is replicated and is obtained, and the gap of each circle uniformly arranges on the circle of place, angle=360 degree that adjacent slits successively rotate/each
The gap number of circle, the gap size on same circle is identical, is gradually increased from inner ring to the size in outer ring gap；It is every to enclose adjacent seam
It is divided into the wavelength of 0.6 radial line waveguide (1) between gap, the distance between each gap midpoint is divided between described；It is radial
It is equipped with one at line waveguide (1) upper surface center and runs through the annular slot of waveguide surface copper clad layers as matching annulus (3)；4 same
Axis probe (4) is uniformly distributed on the circumference of matching annulus (3) internal concentric, and 4 coaxial probes (4) are used for radial line wave
(1) feed is led, coaxial probe (4) one end is goed deep into radial line waveguide (1) by location hole, the other end is welded in by location hole
On the output port of feeding network (7)；Feeding network (7) is by Wilkinson power divider (11) and branch line hybrid network (12) grade
Connection is constituted, and for two of them Wilkinson power divider (11) tool there are four output port, two of branch line hybrid network (12) are defeated
Inbound port is connected respectively on the output port of two Wilkinson power dividers (11)；Two sub-miniature A connectors are separately connected transmission network
The input terminal of the Wilkinson power divider (11) of network.
2. high-gain double-circle polarization plate aerial according to claim 1, it is characterised in that: the radiating slot array
It (2) include the concentric annular slot of 5 circles.
3. high-gain double-circle polarization plate aerial according to claim 1, it is characterised in that: left-hand circular polarization feeds SMA
Connector (8), right-handed circular polarization feed sub-miniature A connector (9) are separately connected the input terminal of the Wilkinson power divider (11) of feeding network.
4. high-gain double-circle polarization plate aerial according to claim 1, it is characterised in that: each gap with from radiating slot
The acute angle for the radial line that gap array (2) center of circle issues is 43-47 degree.
5. high-gain double-circle polarization plate aerial according to claim 1, it is characterised in that: below metal profile (6)
Cavity equipped with protrusion, feeding network (7) are fixed on the cavity bottom by metallic screw (10).
6. high-gain double-circle polarization plate aerial according to claim 1, it is characterised in that: 4 coaxial probes (4) are uniform
It is distributed on the circumference of the concentric circles of matching annulus (3) inner radial 5mm.
7. high-gain double-circle polarization plate aerial according to claim 1, it is characterised in that: radial line waveguide (1) passes through
Plastic screw (5) is fixed on the upper surface of metal profile (6).
8. high-gain double-circle polarization plate aerial according to claim 1, it is characterised in that: the annular slot edge of adjacent turn
The spacing of the radial direction in gap array (2) center of circle is the wavelength of a radial line waveguide (1).
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| CN201611063503.9A CN106450738B (en) | 2016-11-28 | 2016-11-28 | High-gain double-circle polarization plate aerial |
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| CN201611063503.9A CN106450738B (en) | 2016-11-28 | 2016-11-28 | High-gain double-circle polarization plate aerial |
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| CN106450738B true CN106450738B (en) | 2019-08-23 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107104274B (en) * | 2017-04-06 | 2020-01-07 | 上海交通大学 | Low-profile broadband wide-angle array beam scanning circularly polarized array antenna |
| JP2019008945A (en) * | 2017-06-22 | 2019-01-17 | 東京エレクトロン株式会社 | Antenna and plasma processing apparatus |
| CN108242600B (en) * | 2018-01-04 | 2020-09-15 | 电子科技大学 | Linearly polarized monopulse planar slot antenna |
| CN109638443B (en) * | 2018-12-27 | 2020-08-11 | 东南大学 | Flat broadband circularly polarized antenna with symmetrical wave beams |
| CN110911811B (en) * | 2019-10-19 | 2022-02-22 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Dual-polarized array antenna capable of being realized by single dielectric plate |
| CN112909580B (en) | 2021-01-26 | 2021-11-02 | 华南理工大学 | Low-profile circularly polarized equal-flux antenna module |
| CN115117634A (en) * | 2022-06-30 | 2022-09-27 | 电子科技大学 | High-gain circularly polarized beam scanning antenna with transmission super surface |
| CN115207607A (en) * | 2022-07-11 | 2022-10-18 | 南阳师范学院 | Low-coupling broadband radial line slot antenna |
| CN115332810A (en) * | 2022-07-28 | 2022-11-11 | 西安空间无线电技术研究所 | Flat-top beam radial waveguide slot array antenna and flat-top beam generation method |
| WO2024065506A1 (en) * | 2022-09-29 | 2024-04-04 | Huawei Technologies Co., Ltd. | Devices and methods for steering an electromagnetic beam having one or more orbital angular momentum modes |
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| JP2012054815A (en) * | 2010-09-02 | 2012-03-15 | Hitachi Maxell Ltd | Directional array antenna apparatus |
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| JP2012054815A (en) * | 2010-09-02 | 2012-03-15 | Hitachi Maxell Ltd | Directional array antenna apparatus |
| CN202949040U (en) * | 2012-10-25 | 2013-05-22 | 中国传媒大学 | Circular polarization radial slot antenna with distance from starting gap to center smaller than one waveguide wavelength |
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