CN107959113A - A kind of dual-linear polarization antenna - Google Patents
A kind of dual-linear polarization antenna Download PDFInfo
- Publication number
- CN107959113A CN107959113A CN201711417406.XA CN201711417406A CN107959113A CN 107959113 A CN107959113 A CN 107959113A CN 201711417406 A CN201711417406 A CN 201711417406A CN 107959113 A CN107959113 A CN 107959113A
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- circuit board
- layer circuit
- antenna
- location division
- subreflector
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a kind of dual-linear polarization antenna, including primary reflector, feed array, secondary reflecting element, mounting bracket.Feed array is installed on the primary reflection surface of primary reflector by mounting bracket, and secondary reflecting element is also installed on to the overhead of feed array, make the subreflector of secondary reflecting element parallel to feed array, and the center of subreflector and the center of feed array are located along the same line, and feed array is located at the focal point of primary reflection surface.Mounting bracket includes：Erect the column for the circle centre position for being fixed on primary reflection surface in one end；It is fixed on the slot of the focal point on the other end of column and positioned at primary reflection surface；Be welded on subreflector and using the center of subreflector as the center of circle multiple location divisions one of annular layout；Be welded on the bottom surface of slot and using the center of feed array as the center of circle multiple location divisions two of annular layout；One end is fixed on a location division one and opposite other end is fixed on multiple supporting rods on a location division two.Feed array is installed on slot.
Description
Technical field
The present invention relates to microwave communication, a kind of antenna of the star ground in communication in moving field, more particularly to a kind of dual-linear polarization day
Line.
Background technology
It is the antenna that critical piece forms by metal mirror and feed, mainly includes single reflection surface antenna and double-reflecting face
Two major class of antenna, this is to be based on antenna form derived from optical principle, is widely used in microwave and the shorter wave band of wavelength.Second
A variety of single reflection surface antennas start largely to use before and after world war, occur to the sixties using Cassegrain antenna as representative
Dual reflector antenna.They have become most common a kind of microwave and millimeter wave high-gain aerial, are widely used in communication, thunder
Reach, radionavigation, electronic countermeasure, remote measurement, the technical field such as radio astronomy and meteorology.By taking satellite communication as an example, due to gain
High and simple in structure, reflector antenna is the principal antenna form of communication satellite earth station；Since extensible folding umbrella can be made
Shape structure, it is the citation form of spaceship and satellite antenna again.So far diversified reflecting surface shape has not only been generated
Formula meets different needs, while a variety of feed structures of function admirable also occurs.
Communication in moving is the abbreviation of " ground satellite station communication system on the move ".Star " communication in moving " be to meet user
The new opplication that the demand of broadband video information produces is transmitted in dynamic mobile by satellite, uses the Ku frequencies of trapped orbit satellite
Duan Jinhang mobile communication transmission wide-band-messages, are a kind of emerging service applications.Pass through communication in moving system, vehicle, steamer, aircraft etc.
Mobile carrier during the motion can the platform such as real-time tracking satellite, transmit the multimedias such as voice, data, image incessantly
Information, can meet the needs of various military-civil emergency communications and the multimedia communication under mobile condition.
At present, " communication in moving " system is mainly communicated using Ku wave bands with trapped orbit satellite.According to 2014 national
Issue《The static middle onboard satellite communication earth station generic specifications used of Ku frequency ranges》、《Ku frequency range portable satellites lead to
Believe earth station generic specifications》Deng documentation requirements, Ku wave bands " communication in moving " system need to by application subsystem, power subsystem,
Channel subsystem, antenna and its control system etc. form.Antenna system need to cover uplink/downlink frequency range at the same time, wherein upper line frequency
Section is 13.75~14.5GHz, 10.95~11.75GHz of band downlink, 12.25~12.75GHz, the pole of uplink and downlink frequency range
Turn to two orthogonal linear polarizations.To ensure communication smooth between satellite and earth moving equipment, system antenna need to be directed toward logical in real time
Believe satellite.To the interference of neighbouring satellite when launching in order to avoid antenna, it usually needs the tracking of mobile equipment antenna during exercise
Error is less than 0.1 °, and feed will also carry out rotation tracking, and the polarization isolation received between transmitting is greater than 30dB.This
Outside, corresponding requirement it is also proposed to the transmission power of antenna, minor level etc. in file.
At present, have many enterprises' unit both at home and abroad and be proposed " communication in moving " relevant product, as Israel RaySat is public
Multigroup chip antenna of department's release, the IMVS450M products of U.S. TracStar releases, Starling companies of Israel release
0.5m and the vehicle-mounted ring-focus antennas of 1.2m that Mijet series of products and Zhong electricity groups 54 of the country are researched and developed etc..To meet antenna pair
The requirement of the high-precision real-time tracking alignment of satellite, includes automatic tracking system in above-mentioned " communication in moving " product." in dynamic
It is logical " automatic tracking system is in the case of initial static, course angle, carrier are measured by GPS, theodolite, Strapdown Inertial Navigation System
The longitude and latitude of position and the initial angle of relative level, then according to its posture and geographical location, satellite longitude certainly
The dynamic antenna elevation angle determined on the basis of horizontal plane, the rotational orientation on the premise of the holding elevation angle is constant to horizontal plane, and with letter
Number maximum mode is automatically to satelloid.During carrier movement, the change of attitude of carrier is measured, passes through mathematical platform
Computing, is transformed to the error angle of antenna, and antenna azimuth, pitch angle, polarizing angle are adjusted by servo control mechanism, ensures that carrier is becoming
Antenna makes satellite transmitting antenna real-time tracking geostationary satellite in carrier movement to star in prescribed limit during change.
The system tracking mode has autotracking and inertial navigation to track two kinds.Autotracking be by satellite beacon carry out antenna closed servo with
Track；Inertial navigation tracking is to carry out antenna tracking using the change of gyro inertial navigation combination sensitive carrier.Both tracking can be according to scene
Situation automatically switches.After system, which finishes star, to be transferred to from motion tracking, worked in a manner of autotracking；At the same time, inertial navigation system
Also enter working status, and constantly export the data such as antenna polarization, orientation and pitching.When due to blocking or other reasons cause day
When line beacon signal is interrupted, system automatically switches to inertial navigation tracking mode.
No matter which kind of tracking mode antenna uses, and high-precision servo-drive system is the key of traditional " communication in moving " system all the time
One of part.Under normal conditions, high accuracy servo system need to have about 0.1 ° of high tracking accuracy, simultaneously because " communication in moving " day
Line has larger bore (the desired antenna aperture that meets to network at present is more than 1 meter) and weight, is watched so as to cause high accuracy
The higher cost of dress system.At present, applied to " communication in moving " high accuracy servo system cost easily it is tens thousand of, even more than ten
Ten thousand, whole " communication in moving " system cost most is accounted for, it is extensive in civil field to limit " communication in moving " communication system
Using.
In current satellite communication antena, whether secondary reflecting element is to be needed according to environment and consider to add, and adds secondary reflection
During part, it needs to ensure that the subreflector of secondary reflecting element facing away from feed array, and towards the overhead field of feed array.Cause
, it is necessary to use mounting bracket, mounting bracket is used for the slot that secondary reflecting element is installed on to feed array, and needs for this：Pair reflection
The subreflector of part is parallel to feed array, and the center of subreflector and the center of feed array are located along the same line.It is no
Then easily there is bigger communication data error, it is therefore desirable to reduce frock error when assembled, and ensure that secondary reflecting element exists
With respect to the stationarity of feed array during long-time service.
The content of the invention
In view of this, the present invention provides a kind of dual-linear polarization antenna, and feed array of the invention coordinates with primary reflection surface, can
, can using this technology to realize that antenna system is scanned and tracked to the low-angle of satellite, high speed, high-precision electron beam
To reduce the requirement to the precision and dynamic response speed of servo-drive system, so as to reduce the cost of servo-drive system；Furthermore the present invention
Frock error when secondary reflecting element is assembled in feed array overhead can be reduced, and ensures secondary reflecting element in the long-term use
With respect to the stationarity of feed array.
The present invention solution be：A kind of dual-linear polarization antenna, including primary reflector, feed array, secondary reflecting element, peace
Shelve；Feed array is installed on the primary reflection surface of primary reflector by the mounting bracket, and secondary reflecting element also is installed on feed
The overhead of array, makes the subreflector of secondary reflecting element parallel to feed array, and in the center of subreflector and feed array
The heart is located along the same line, and feed array is located at the focal point of primary reflection surface；
The mounting bracket includes column, slot, multiple location divisions one, multiple location divisions two, multiple supporting rods；Wherein, stand
The circle centre position for being fixed on primary reflection surface is erect in column one end, and slot is fixed on the other end of column and positioned at the focus of primary reflection surface
Place, feed array are installed on slot；Multiple location divisions one are welded on subreflector, and using the center of subreflector as circle
The heart and annular layout；Multiple location divisions two are welded on the bottom surface of slot, and as the center of circle and annular using the center of feed array
Layout, multiple location divisions two are corresponded with multiple location divisions one respectively, and location division two is with corresponding location division one positioned at same
In plane, and place plane is perpendicular to subreflector；One end of each supporting rod is fixed therein on a location division one, each
The opposite other end of supporting rod is fixed therein on a location division two；Each supporting rod is the laminated structure repeatedly bent, often
The both ends of a supporting rod are oppositely arranged and are parallel to each other up and down；
Feed array includes the upper layer circuit board, middle layer circuit board and bottom circuit board being arranged in order from top to bottom；
It is spaced fixed between upper layer circuit board, middle layer circuit board and bottom circuit board and is parallel to each other；Bottom circuit board is band gold
The microstrip reflection plate of possession plate, offers several transmitting antennas feedback mouth and reception antenna feedback mouth thereon；Middle layer circuit board is
The antenna structure of micro-strip form, its positive and negative are to be divided into several regions by trellis metal band circuit, positive and negative
Trellis metal band circuit is by plated-through hole mutual conduction；Upper layer circuit board is one block of dielectric-slab；The bottom side of bottom circuit board
Attached conductor；
Wherein, the spacing of middle layer circuit board and bottom circuit board is the λ of 0.1 λ~0.3, upper layer circuit board and intermediate layer electricity
The spacing of road plate is the λ of 0.3 λ~0.7, and λ is the free space wavelength corresponding to working frequency；The middle each region of layer circuit board
Front is provided with the metal dipole respectively as reception antenna, reception antenna feed pad, transmitting antenna feed pad, each
The back side in region is provided with the metal dipole as transmitting antenna, and reception antenna feed pad is connected with reception antenna, transmitting
Antenna feed pad is connected with transmitting antenna, and the reception antenna and transmitting antenna of positive and negative corresponding region are arranged in a crossed manner at an angle of 90.
Further as such scheme is improved, and the mounting bracket further includes base, and base is fixed on the circle of primary reflection surface
At the heart, column is erect and is fixed on base.
Further as such scheme is improved, and base is fixed on the circle centre position of primary reflection surface by some fasteners；Insert
Groove and column are in cylinder, and the diameter of column is less than the diameter of slot.
Further as such scheme is improved, the edge of the one end in each supporting rod stationary positioned portion one along subreflector
Extend in parallel, bent downward after extending subreflector and bend and run parallel to accordingly along bottom surface after extending to location division two
Location division two.
Further as such scheme is improved, the edge of the one end in each supporting rod stationary positioned portion one along subreflector
Extend in parallel, bend downward and extend vertically after extending subreflector, then bend and extend towards two direction of location division, extend to
Bent behind location division two and run parallel to corresponding location division two along bottom surface.
Further as such scheme is improved, and the mounting bracket further includes multiple fasteners, and each supporting rod passes through extremely
A few fastener is fixed on corresponding location division one, is also fixed on by least another fastener on corresponding location division two.
Further, supporting rod is located at the same side of corresponding location division one and corresponding location division two, and supporting rod is wherein
One side and corresponding location division one, corresponding location division two are affixed.
Further as such scheme is improved, and is prolonged on the bottom circuit board and is radially provided with 4 power feed holes, and the 4 of radial direction
The both sides of a power feed hole are also respectively provided with 2 power feed holes, set 8 power feed holes altogether, wherein four are presented mouth for transmitting antenna,
Four are presented mouth for reception antenna.
Further as such scheme is improved, several nylon spiral shells are equipped between upper layer circuit board and middle layer circuit board
Column one, the intermediate shaft hole of several nylon studs one are respectively aligned on the mounting hole on layer circuit board and middle layer circuit board
Mounting hole, is equipped with several nylon studs two between middle layer circuit board and bottom circuit board, in several nylon studs two
Between axis hole be respectively aligned to mounting hole on the mounting hole on middle layer circuit board and bottom circuit board.
Preferably, several nylon screws one are after the mounting hole that upper layer circuit board top is passed down through on upper layer circuit board
In precession nylon stud one, several nylon screws two are upward from the bottom of bottom circuit board, sequentially pass through on bottom circuit board
Mounting hole, several nylon studs two, after the mounting hole on middle layer circuit board in precession nylon stud one so that upper strata is electric
Road plate, middle layer circuit board and bottom circuit board are fixed together.
The present invention has the following advantages compared with prior art：
1st, designed antenna feed array can be conveniently applied to the satellite communication antena of single-lens reflex or double-reflecting face
In, low-angle, high speed, high-precision wave beam tracking and scanning are realized, to reduce precision and dynamic speed to mechanical servo
Requirement, so as to reduce the cost of antenna system, promote application of " communication in moving " system in civil field；
2nd, realized and can be applied to using type metal cross dipole minor structure and the principle of " Fabry Perot " antenna
The feed of " communication in moving " antenna；Compared to feed structures such as traditional waveguide mouth, waveguide trumpets, the feed structure simple and compact,
Thus multiple units can be realized in less area and transmit/receive passage, so that beneficial to required by realizing antenna for satellite communication in motion
The beam point steering of higher precision；
3rd, the cancellation techniques used can realize the isolation that 30dB between passage is transmitted/received at same position at antenna structure end
Degree, alleviates the pressure of back end device；
4th, the feed uses microband printing board structure of circuit, and technical maturity, processing is simple, cost is relatively low and is advised suitable for big
Mould produces；
5th, using mounting bracket, its fixed form of location division one on subreflector, fixation of the location division two on bottom surface
Mode, ensure that the firm connection between feed array and secondary reflecting element；Location division one using the center of subreflector as the center of circle and
Annular layout, location division two using the center of feed array as the center of circle annular layout, and location division two and corresponding location division one
Place plane can ensure the subreflector of secondary reflection parallel to feed array, and ensure subreflector perpendicular to subreflector
Center and the center of feed array be located along the same line.Therefore, the present invention can reduce secondary reflecting element and be assembled in feed array
Frock error during overhead, and ensure secondary reflecting element in the long-term use with respect to the stationarity of feed array.
Brief description of the drawings
Fig. 1 is the overall structure diagram using the Cassegrain antenna of dual-linear polarization antenna of the present invention.
Fig. 2 is that secondary reflecting element and feed array use the dimensional structure diagram that mounting bracket is assembled in Fig. 1.
Fig. 3 is the close-up schematic view of Fig. 2.
Fig. 4 is the side view of dual-linear polarization antenna feed array of the present invention.
Fig. 5 is the three-dimensional exploded view of dual-linear polarization antenna feed array of the present invention.
Fig. 6 is the overlooking the structure diagram of the bottom circuit board of dual-linear polarization antenna feed array of the present invention.
Fig. 7 is the side cutaway view of the bottom circuit board in Fig. 6.
Fig. 8 is the overlooking the structure diagram of the middle layer circuit board of dual-linear polarization antenna feed array of the present invention.
Fig. 9 is the bottom view of the middle layer circuit board in Fig. 8.
Figure 10 is the side cutaway view of the middle layer circuit board in Fig. 8.
Figure 11 is the overlooking the structure diagram of the upper layer circuit board of dual-linear polarization antenna feed array of the present invention.
Figure 12 is the side cutaway view of the upper layer circuit board in Figure 11.
Figure 13 is the return loss simulation result figure of dual-linear polarization antenna feed array of the present invention.
Figure 14 is the receiving port of dual-linear polarization antenna feed array of the present invention and the measured result figure of emission port.
Figure 15 is dual-linear polarization antenna feed array of the present invention in working frequency points 12.5GHz and 0 ° of azimuth plane and azimuth plane
Emulation array received directionality figure in 90 °.
Figure 16 is dual-linear polarization antenna feed array of the present invention in working frequency points 12.5GHz and 0 ° of azimuth plane and azimuth plane
Actual measurement array received directionality figure in 90 °.
Figure 17 is dual-linear polarization antenna feed array of the present invention in working frequency points 14.1GHz and 0 ° of azimuth plane and azimuth plane
Emulation array emitter directionality figure in 90 °.
Figure 18 is dual-linear polarization antenna feed array of the present invention in working frequency points 14.1GHz and 0 ° of azimuth plane and azimuth plane
Actual measurement array emitter directionality figure in 90 °.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In the Cassegrain antenna shown in Fig. 1, Cassegrain antenna is applied in moving dual-linear polarization antenna applications of the present invention
In logical, which further includes primary reflector 3 in addition to dual-linear polarization antenna.Dual-linear polarization antenna includes feed battle array
Row 2, secondary reflecting element 1, mounting bracket.Feed array 2 is fixed on the primary reflection surface of primary reflector 3, and the center of feed array 2 is put
Put the focal point in Cassegrain antenna.
Fig. 2 and Fig. 3 is please combined in the lump, and secondary reflecting element 1 is installed on 2 overhead of feed array by mounting bracket, and mounting bracket can guarantee that
The subreflector 75 of secondary reflecting element 1 is parallel to feed array 2, and the center of subreflector 75 and the center of feed array 2 are located at
On same straight line, and ensure that feed array 2 is located at the focal point of primary reflection surface 710..
Mounting bracket includes base 711, column 712, slot 73, multiple location divisions 1, multiple location divisions 2 76, Duo Gezhi
Strut 78, multiple fasteners 79.The circle centre position for being fixed on primary reflection surface 710 is erect in 712 one end of column, and slot 73 is fixed on column
It is installed on 712 other end and positioned at the focal point of primary reflection surface 710, feed array 2 on slot 73.In the present embodiment,
Base 711 is fixed on the circle centre position of primary reflection surface 710, and column 712 is erect and is fixed on base 711, and base 711 passes through some tight
Firmware is fixed on the circle centre position of primary reflection surface 710.Slot 73 and column 712 can be in cylinder, and the diameter of column 712 is less than
The diameter of slot 73.
Quantity between location division 1, location division 2 76, supporting rod 78 this three is usually corresponding, in other implementations
In example, the quantity of location division 1 and location division 2 76 can be more than the quantity of supporting rod 78 respectively.As for 79 quantity of fastener
Do not specially require, as long as fixed device can will be needed to fix, each device, can be according to the time when fixing
Installation environment takes the circumstances into consideration to increase fastener.
These location divisions 1 are welded on subreflector 75, and using the center of subreflector 75 as the center of circle annular cloth
Office, these location divisions 2 76 are welded on the bottom surface 77 of slot 73, and using the center of feed array 2 as the center of circle annular cloth
Office, multiple location divisions 2 76 are corresponded with multiple location divisions 1 respectively, location division 2 76 and corresponding location division one 74
In on same plane, and place plane is perpendicular to subreflector 75.
One end of each supporting rod 78 is fixed therein on a location division 1, the opposite other end of each supporting rod 78
It is fixed therein on a location division 2 76, each supporting rod 78 is the laminated structure that repeatedly bends, the two of each supporting rod 78
End is oppositely arranged and is parallel to each other up and down.The structure design of supporting rod 78 reduces mounting bracket of the present invention to the anti-of secondary reflecting element 1
The influence of performance and the feedback performance of feed array 2 is penetrated, also reduces the influence to the primary reflection surface of antenna.Therefore, Duo Geding
Position portion 1 tries one's best uniform ring cloth on subreflector 75, and uniform ring cloth is also tried one's best on bottom surface 77 in multiple location divisions 2 76.
Fixed form of the supporting rod 78 by location division 1 on subreflector 75, supporting rod 78 pass through location division 2 76
Fixed form on bottom surface 77, ensure that the firm connection between feed array 2 and secondary reflecting element 1.Location division 1 is with pair
The center of reflecting surface 75 is the center of circle and annular layout, location division 2 76 using the center of feed array 2 as the center of circle annular layout, and
Location division 2 76, perpendicular to subreflector 75, can ensure that the pair of secondary reflecting element 1 is anti-with corresponding one 74 place plane of location division
Face 75 is penetrated parallel to feed array 2, and ensures that the center of subreflector 75 and the center of feed array 2 are located along the same line.
The one end in each 78 stationary positioned portion 1 of supporting rod can be extended in parallel along the edge of subreflector 75, extend pair
Bent downward after reflecting surface 75 and bent after extending to location division 2 76 and run parallel to corresponding location division two along bottom surface 77
76.In the present embodiment, the one end in each 78 stationary positioned portion 1 of supporting rod is extended in parallel along the edge of subreflector 75, is prolonged
Bend downward and extend vertically after stretching out subreflector 75, then bend and extend towards 2 76 direction of location division, extend to location division
Bent after 2 76 and run parallel to corresponding location division 2 76 along bottom surface 77.
Each supporting rod 78 is fixed on corresponding location division 1 by least one fastener 79.Each supporting rod 78 is logical
At least another fastener 79 is crossed to be fixed on corresponding location division 2 76.Fastener 79 can use screw, bolt, pin it
Class is used for fixed device.
Supporting rod 78 is advantageous in that the both ends of supporting rod 78 can be with location division 1, location division two for laminated structure
76 are preferably stably connected with.Supporting rod 78 is located at the same side of corresponding location division 1 and corresponding location division 2 76, and supporting rod
78 one of side and corresponding location division 1, corresponding location division 2 76 are affixed.The fixed form increase support being affixed
Contact area between the both ends and location division 1, location division 2 76 of bar 78.
Refering to Fig. 4 and Fig. 5, feed array 2 is using " Fabry Perot " antenna based on microband printing circuit board (PCB)
Form, including upper layer circuit board 16, middle layer circuit board 17 and the bottom circuit board 18 being arranged in order from top to bottom.Upper strata
It is spaced fixed between circuit board 16, middle layer circuit board 17 and bottom circuit board 18 and is parallel to each other, screwed lock can be passed through
Gu.
Three layer circuit boards can be to be made in the medium copper-clad plate that dielectric constant is 3, wherein, bottom circuit board 18 is
Microstrip reflection plate with metal floor, middle layer circuit board 17 are the antenna structure of micro-strip form, and upper layer circuit board 16 is one piece
Play the prefect dielectric plate of enhancing directionality.The thickness of upper layer circuit board 16, middle layer circuit board 17 and bottom circuit board 18
Respectively 3mm, 0.5mm and 1.5mm, diameter is identical, is 54mm.Three layer circuit boards it is identical by four positions and rotation pair
The mounting hole of title is connected with each other, and the mounting hole pitch-row of diagonal position is 49mm, aperture 2mm.
Please refer to Fig. 6 and Fig. 7, the attached conductor in 18 bottom side of bottom circuit board, such as copper, and 4 are offered thereon
Mounting hole 4, and prolong and be radially provided with 4 power feed holes 5.The both sides of 4 power feed holes 5 of radial direction are also respectively provided with 2 power feed holes 5,
8 power feed holes 5 are set altogether, wherein four are presented mouth for transmitting antenna, four are presented mouth for reception antenna.SSMA interfaces 24 pass through feedback
Electric eyelet welding is connected on bottom circuit board 18, and upper and lower side stretches out bottom circuit board 18, and hollow copper platform 6 is welded on bottom by power feed hole
The upper end of layer circuit board 18, and cover on the inner core of SSMA interfaces 24.The master that Cassegrain antenna is fixed on when feed array 2 is anti-
When penetrating on part 3, there is waist hole gasket 22 between feed array 2 and primary reflector 3, specifically, the both ends difference of waist hole gasket 22
Through hole is offered, waist hole gasket 22 is locked on bottom circuit board 18 by one of through hole screw.
It is the structure diagram of middle layer circuit board 17 please refer to Fig. 8, Fig. 9 and Figure 10, wherein Fig. 8 is top view,
Fig. 9 is look up figure, and Figure 10 is side cutaway view.4 mounting holes 7, and intermediate layer circuit are offered on middle layer circuit board 17
The positive and negative of plate 17 is divided into 4 regions, the structure all same in positive each region, and design parameter slightly has difference, reverse side
Also all same, design parameter also slightly have difference to the structure in each region.
Assembled for ease of processing, each region of positive and negative opens up 1 dielectric-slab windowing 11.To completely cut off surface wave other side
Influence to figure, the positive and negative of middle layer circuit board 17 is powered by the trellis metal strip with certain opening structure 172
Road 14 is divided into 4 regions, and the trellis metal band circuit 14 of positive and negative is by plated-through hole (not shown) mutual conduction.This
In, it is the resonator closed in order to avoid formation that opening is introduced on trellis metal band circuit 14, in order to avoid deteriorate the matching of antenna
Characteristic.By the setting to plated-through hole structure, and 14 cut zone of trellis metal band circuit is used in the circuit board,
And the surface wave in medium has been isolated in the setting of trellis metal band circuit 14, so that the mutual coupling between reducing array element.
The front in each region be provided with the metal dipole respectively as reception antenna 9, reception antenna feed pad 10,
Transmitting antenna feed pad 8, the back side in each region are provided with the metal dipole as transmitting antenna 13.Reception antenna is fed
Pad 10 is connected with reception antenna 9, and transmitting antenna feed pad 8 is connected with transmitting antenna 13, the reception of positive and negative corresponding region
Antenna 9 and transmitting antenna 13 are arranged in a crossed manner at an angle of 90, reception antenna 9 and transmitting antenna 13 work in transmit/receive respectively (downlink/on
OK) frequency range, dipoles scatter minor structure arranged in a crossed manner can correspond to two quadrature linear polarizations realized required by transmitting/receiving, reception antenna 9
It is adjustable with the brachium of transmitting antenna 13.
For convenient welding, reception antenna feed pad 10, transmitting antenna feed pad 8 are arranged on side.Further to subtract
Small feed structure is on influencing caused by isolating between transmitting/receiving, in the design by two dipole structures at same position, that is, same
Reception antenna 9 at position positioned at circuit board positive and negative is connected with transmitting antenna 13 by one section of printing thin wire, while is also set
Being equipped with improves the type metal disk 12 of transceiver channel isolation.The diameter of rosette 12 is about the λ of 0.05 λ~0.2, positioned at gold
Belong near the apex angle of rectangular element that band 14 is divided into, the centre-to-centre spacing of rosette 12 surround two sides of corresponding apex angle away from
From being each about the λ of 0.15 λ~0.35.λ is the free space wavelength corresponding to working frequency.By adjust the thin wire length,
The parameters such as thickness and the size and location of rosette 12 can using suitably offset means realize between transmitting/receiving it is high every
From.
Reception antenna 9 and transmitting antenna 13 in structure realize bottom coaxial feed by SSMA interfaces 24.Wherein
The two-arm of reception antenna 9 and transmitting antenna 13 passes through one section of printing thin wire with the inner core and outer wall of SSMA interfaces 24 respectively
It is connected.Here use and be to reduce influence of the feed structure between transmitting/receiving isolating the reason for thin wire.
Please refer to Figure 11 and Figure 12,4 mounting holes 15 are offered on upper layer circuit board 16, upper layer circuit board 16 is to cover
The prefect dielectric plate that copper coin all etches away, is the superstructure for forming " Fabry Perot ".
As preferable connection mode, 4 nylon studs one are equipped between upper layer circuit board 16 and middle layer circuit board 17
The intermediate shaft hole of 20,4 nylon studs 1 is respectively aligned to mounting hole 15 and middle layer circuit board 17 on layer circuit board 16
On mounting hole 7.4 nylon studs, 2 21,4 nylon studs two are equipped between middle layer circuit board 17 and bottom circuit board 18
21 intermediate shaft hole is respectively aligned to the mounting hole 4 on the mounting hole 7 and bottom circuit board 18 on middle layer circuit board 17.4 Buddhist nuns
Imperial screw 1 is from precession nylon stud one after the mounting hole 15 that upper 16 top of layer circuit board is passed down through on upper layer circuit board 16
In 20,4 nylon screws 2 23 are upward from the bottom of bottom circuit board 18, sequentially pass through mounting hole 4 on bottom circuit board 18,
After mounting hole 7 on 4 nylon studs 2 21, middle layer circuit board 17 in precession nylon stud 1, so that upper layer circuit board
16th, middle layer circuit board 17 and bottom circuit board 18 are fixed together.
In the feed structure, the spacing of medium substrate has direct shadow to the bandwidth of operation of structure and radiation gain
Ring.Wherein, the suitable of middle layer circuit board 17 and bottom circuit board 18 is spaced about the λ of 0.1 λ~0.3, and λ is right for working frequency
The free space wavelength answered.When both spacing are too small, the gain of feed structure is higher, but overall work bandwidth is narrow；
When both spacing are excessive, the gain of feed structure is too low, narrower bandwidth, and feed physical arrangement will be larger.
In addition, the suitable of upper layer circuit board 16 and middle layer circuit board 17 is spaced about the λ of 0.3 λ~0.7.When between both
Away from it is excessive or too small when, can make it that the gain of feed structure is too low, bandwidth of operation is relatively narrow.In the feed array structure,
Can layer circuit board 16, middle layer circuit board 17 and bottom circuit board 18 in corresponding adjusting by the height for adjusting nylon bolt
Between spacing, thus can convenient adjustment structure radiation gain to adapt to the demand from different reflecting surface sizes and focal length.
In addition, the brachium by adjusting metal dipole, the working frequency of adjustable structure.Due to arrangement works with it is higher
Frequency, the medium substrate in structure need to have good high frequency characteristics.The dielectric constant of medium substrate, thickness in the feed structure
And the parameter such as spacing is respectively provided with overall work frequency range, bandwidth of operation, gain and inter-element mutual coupling of structure etc. significantly
Influence, need to carry out comprehensive design emphatically in actual design and optimize and revise.
When making, its production method comprises the following steps the dual-linear polarization antenna of the present invention.
Step 1, determines the center of the primary reflection surface 710 of primary reflector 3, and base 711 is fixed on primary reflection surface 710
At center.In order to ensure the center of follow-up primary reflector 3, the center of feed array 2, secondary reflecting element 1 center positioned at same straight
On line, circular base 711 is selected as far as possible, and the center of circle of base 711 is located at the center of primary reflection surface 710.
One end of column 712, is erect the circle centre position for being fixed on base 711, other end fixed slot 73, slot by step 2
73 are located at the focal point of primary reflection surface 710.So ensure that the feed array 2 being inserted into slot 73 can be located at principal reflection
In the focus in face 710.In order to reduce assembly error, column 712 and slot 73 can be first assembled into an entirety, it is then solid again
It is scheduled on base 711.
Step 3, feed array 2 is inserted into slot 73.
Step 4, multiple location divisions 1 are welded on subreflector 75, and using the center of subreflector 75 as circle
The heart and annular layout.
Step 5, multiple location divisions 2 76 are welded on the bottom surface 77 of slot 73, and using the center of feed array 2 as circle
The heart and annular layout, multiple location divisions 2 76 are corresponded with multiple location divisions 1 respectively, location division 2 76 with it is corresponding calmly
Position portion 1 is in the same plane, and place plane is perpendicular to subreflector 75.
Step 6, one end of each supporting rod 78 is fixed therein on a location division 1, opposite other end is fixed
Wherein on a location division 2 76；The both ends of each supporting rod 78 are oppositely arranged and are parallel to each other up and down, wherein, primary reflector
3 center, the center of feed array 2, the center of secondary reflecting element 1 are located along the same line.
Step 4 can do opposite adjustment, can be welded on subreflector 75 by multiple location divisions 1 to six
Afterwards, first one end of each supporting rod 78 is fixed therein on a location division 1, secondary reflecting element 1, location division 1, branch
Strut 78 is assembled again after forming an entirety, and convenient installation reduces assembling tolerance at the same time.Then, by multiple location divisions 2 76
After being welded on the bottom surface 77 of slot 73, then the opposite other end of each supporting rod 78 is fixed therein a location division two
On 76.In other embodiments, base 711, column 712, location division 2 76, slot 73 first can also be formed an entirety.
When feed array 2 is made, the production method of feed array 2 comprises the following steps：
The intermediate shaft hole of nylon stud 1 is respectively aligned to mounting hole 15 and middle layer circuit board on layer circuit board 16
Mounting hole 7 on 17；
The intermediate shaft hole of nylon stud 2 21 is respectively aligned to mounting hole 7 and bottom circuit board 18 on middle layer circuit board 17
On mounting hole 4；
Nylon screw 1 is from precession after the mounting hole 15 that upper 16 top of layer circuit board is passed down through on upper layer circuit board 16
In nylon stud 20；
Nylon screw 2 23 is upward from the bottom of bottom circuit board 18, sequentially pass through mounting hole 4 on bottom circuit board 18,
After mounting hole 7 on several nylon studs 21, middle layer circuit board 17 in precession nylon stud 20, so that upper layer circuit board
16th, middle layer circuit board 17 and bottom circuit board 18 are fixed together.
Figure 13 and Figure 14 is emulation and the test return loss knot of the dual-linear polarization antenna feed array of the embodiment of the present invention 1
Fruit is schemed, wherein：(its middle port 1, port 3, port 5, port 7 be receiving port, and port 2, port 4, port 6, hold for Figure 13 emulation
Mouth 8 is emission port)；Figure 14 is received to survey with emission port.It can be seen from the above that receiving port and emission port echo exist respectively
It is less than -10dB in the range of 12.25GHz~12.75GHz and 13.75GHz~14.5GHz, has reached matched well.
Figure 15 and Figure 16 is the dual-linear polarization antenna feed array of the embodiment of the present invention 1 in the imitative of working frequency points 12.5GHz
True and actual measurement array received directionality figure, wherein：Simulation result in 90 ° of 0 ° of Figure 15 azimuth planes and azimuth plane；0 ° of Figure 16 azimuth planes
With measured result in 90 ° of azimuth plane.It can be seen from the above that when working in 12.5GHz, antenna is 15dB in the gain of zenith direction, secondary
Valve (emulation)/18dB (actual measurement) lower 10dB than main lobe.
Figure 17 and Figure 18 is the dual-linear polarization antenna feed array of the embodiment of the present invention 1 in the imitative of working frequency points 14.1GHz
True and actual measurement array emitter directionality figure, wherein：Simulation result in 90 ° of 0 ° of Figure 17 azimuth planes and azimuth plane；0 ° of Figure 18 azimuth planes
With measured result in 90 ° of azimuth plane.It can be seen from the above that when working in 14.1GHz, antenna is 15dB in the gain of zenith direction, secondary
Valve (emulation)/10dB (actual measurement) lower 11dB than main lobe.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of dual-linear polarization antenna, it includes primary reflector (3), feed array (2), secondary reflecting element (1), mounting bracket；It is described
Feed array (2) is installed on the primary reflection surface (710) of primary reflector (3) by mounting bracket, and is also installed on secondary reflecting element (1)
The overhead of feed array (2), makes the subreflector (75) of secondary reflecting element (1) parallel to feed array (2), and subreflector (75)
Center and the center of feed array (2) be located along the same line, and feed array (2) is located at the focus of primary reflection surface (710)
Place；It is characterized in that,
The mounting bracket includes column (712), slot (73), multiple location divisions one (74), multiple location divisions two (76), Duo Gezhi
Strut (78)；Wherein, the circle centre position for being fixed on primary reflection surface (710) is erect in column (712) one end, and slot (73) is fixed on column
(712) it is installed on the other end and positioned at the focal point of primary reflection surface (710), feed array (2) on slot (73)；It is multiple fixed
Position portion one (74) is welded on subreflector (75), and using the center of subreflector (75) as the center of circle annular layout；It is multiple
Location division two (76) is welded on the bottom surface (77) of slot (73), and using the center of feed array (2) as the center of circle annular cloth
Office, multiple location divisions two (76) correspond with multiple location divisions one (74) respectively, location division two (76) and corresponding location division
One (74) are in the same plane, and place plane is perpendicular to subreflector (75)；One end of each supporting rod (78) is fixed on
On one of location division one (74), the opposite other end of each supporting rod (78) is fixed therein a location division two (76)
On；Each supporting rod (78) is the laminated structure repeatedly bent, and the both ends of each supporting rod (78) are oppositely arranged and mutually up and down
It is parallel；
Feed array (2) includes upper layer circuit board (16), middle layer circuit board (17) and the bottom being arranged in order from top to bottom
Circuit board (18)；Fixed and phase is spaced between upper layer circuit board (16), middle layer circuit board (17) and bottom circuit board (18)
It is mutually parallel；Bottom circuit board (18) is the microstrip reflection plate with metal floor, offer thereon several transmitting antennas feedback mouth and
Reception antenna presents mouth；Middle layer circuit board (17) is the antenna structure of micro-strip form, its positive and negative is by trellis metal strip
Band circuit (14) is divided into several regions, and the trellis metal band circuit (14) of positive and negative is by plated-through hole mutual conduction；
Upper layer circuit board (16) is one block of dielectric-slab；The attached conductor in bottom side of bottom circuit board (18)；
Wherein, the spacing of middle layer circuit board (17) and bottom circuit board (18) is the λ of 0.1 λ~0.3, upper layer circuit board (16) with
The spacing of middle layer circuit board (17) is the λ of 0.3 λ~0.7, and λ is the free space wavelength corresponding to working frequency；Intermediate layer circuit
The front in each region is respectively arranged with the metal dipole as reception antenna (9), reception antenna feed pad on plate (17)
(10), transmitting antenna feed pad (8), the back side in each region are provided with the metal dipole as transmitting antenna (13), connect
Receive antenna feed pad (10) to be connected with reception antenna (9), transmitting antenna feed pad (8) is connected with transmitting antenna (13), just
The reception antenna (9) and transmitting antenna (13) of reverse side corresponding region are arranged in a crossed manner at an angle of 90.
2. dual-linear polarization antenna as claimed in claim 1, it is characterised in that：The mounting bracket further includes base (711), base
(711) circle centre position of primary reflection surface (710) is fixed on, column (712) is erect and is fixed on base (711).
3. dual-linear polarization antenna as claimed in claim 1, it is characterised in that：Base (711) is fixed on by some fasteners
The circle centre position of primary reflection surface (710)；Slot (73) and column (712) are in cylinder, and the diameter of column (712) is less than slot
(73) diameter.
4. dual-linear polarization antenna as claimed in claim 1, it is characterised in that：Each supporting rod (78) stationary positioned portion one (74)
One end extended in parallel along the edge of subreflector (75), bent downward after extending subreflector (75) and extend to location division
Two (76) bend and run parallel to corresponding location division two (76) along bottom surface (77) afterwards.
5. dual-linear polarization antenna as claimed in claim 1, it is characterised in that：Each supporting rod (78) stationary positioned portion one (74)
One end extended in parallel along the edge of subreflector (75), bend downward and extend vertically after extending subreflector (75), then
Bend and extend towards location division two (76) direction, extend to location division two (76) and bend afterwards and run parallel to phase along bottom surface (77)
The location division two (76) answered.
6. dual-linear polarization antenna as claimed in claim 1, it is characterised in that：The mounting bracket further includes multiple fasteners, often
A supporting rod (78) is fixed on corresponding location division one (74) by least one fastener, also passes through at least another fastener
It is fixed on corresponding location division two (76).
7. dual-linear polarization antenna as claimed in claim 6, it is characterised in that：Supporting rod (78) is located at corresponding location division one (74)
It is and one of side of supporting rod (78) and corresponding location division one (74), corresponding with the same side of corresponding location division two (76)
Location division two (76) is affixed.
8. dual-linear polarization antenna as claimed in claim 1, it is characterised in that：Prolong on bottom circuit board (18) and be radially provided with 4
Power feed hole (5), the both sides of 4 power feed holes (5) of radial direction are also respectively provided with 2 power feed holes (5), set 8 power feed holes altogether
(5), wherein four are presented mouth for transmitting antenna, four are presented mouth for reception antenna.
9. dual-linear polarization antenna as claimed in claim 1, it is characterised in that：Upper layer circuit board (16) and middle layer circuit board
(17) several nylon studs one (20) are equipped between, the intermediate shaft hole of several nylon studs one (20) is respectively aligned to upper strata electricity
The mounting hole (7) on mounting hole (15) and middle layer circuit board (17) on road plate (16), middle layer circuit board (17) and bottom
Several nylon studs two (21) are equipped between circuit board (18), the intermediate shaft hole of several nylon studs two (21) is respectively aligned to
The mounting hole (4) on mounting hole (7) and bottom circuit board (18) on middle layer circuit board (17).
10. dual-linear polarization antenna as claimed in claim 9, it is characterised in that：By several nylon screws one (19) from upper
Precession nylon stud one (20) is inner afterwards for the mounting hole (15) that layer circuit board (16) top is passed down through on layer circuit board (16), leads to
Cross that several nylon screws two (23) are upward from the bottom of bottom circuit board (18), sequentially pass through consolidating on bottom circuit board (18)
Determine hole (4), several nylon studs two (21), the mounting hole (7) on middle layer circuit board (17) precession nylon stud one afterwards
(20) it is inner, so that upper layer circuit board (16), middle layer circuit board (17) and bottom circuit board (18) are fixed together.
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| CN201711417406.XA CN107959113B (en) | 2017-12-25 | 2017-12-25 | Dual-polarized antenna |
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| CN201711417406.XA CN107959113B (en) | 2017-12-25 | 2017-12-25 | Dual-polarized antenna |
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| CN107959113B CN107959113B (en) | 2023-10-20 |
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| CN110137659A (en) * | 2019-05-22 | 2019-08-16 | 南京吉凯微波技术有限公司 | A kind of the folding assembling-disassembling structure and mounting and dismounting method of vehicular heavy caliber radar antenna |
| CN111864404A (en) * | 2020-08-10 | 2020-10-30 | 北京无线电测量研究所 | Off-axis double-offset Cassegrain antenna and satellite communication system comprising same |
| CN115000669A (en) * | 2022-06-30 | 2022-09-02 | 中国电子科技集团公司第五十四研究所 | Auxiliary face overturning and rotating device for vehicle-mounted antenna |
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| CN111864404A (en) * | 2020-08-10 | 2020-10-30 | 北京无线电测量研究所 | Off-axis double-offset Cassegrain antenna and satellite communication system comprising same |
| CN115000669A (en) * | 2022-06-30 | 2022-09-02 | 中国电子科技集团公司第五十四研究所 | Auxiliary face overturning and rotating device for vehicle-mounted antenna |
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|---|---|
| CN107959113B (en) | 2023-10-20 |
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