CN108511917A - A kind of large-scale curved double-deck layered transducer elements forming method - Google Patents
A kind of large-scale curved double-deck layered transducer elements forming method Download PDFInfo
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- CN108511917A CN108511917A CN201810183769.XA CN201810183769A CN108511917A CN 108511917 A CN108511917 A CN 108511917A CN 201810183769 A CN201810183769 A CN 201810183769A CN 108511917 A CN108511917 A CN 108511917A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
- H01Q15/0046—Theoretical analysis and design methods of such selective devices
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- Bioinformatics & Computational Biology (AREA)
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Abstract
The present invention proposes a kind of large-scale curved double-deck layered transducer elements forming method, plane copper-clad plate technology is used to make high-precision double circle-ring vibrators first, secondly molding layered transducer elements carrier, and according to the electrical performance demands of double-colored subreflector, by analogue simulation, counter push away and experimental test is calculated, determine oscillator position and spacing parameter in layered transducer elements, by digital control processing location hole on layered transducer elements carrier, then step pin is used, is accurately positioned to inside and outside two layers of different parameters oscillator；Finally oscillator unit gluing is fixed on carrier, and is coated with oscillator unit protective layer, to form curved surface bilayer layered transducer elements.The present invention solves the molding problem of the large-scale curved double-deck layered transducer elements, has captured the molding key technology of double-colored subreflector, has realized the production domesticization of the double-colored subreflector of the large-scale curved double-deck layered transducer elements.
Description
Technical field
The present invention relates to antenna technical field, specially a kind of large-scale curved double-deck layered transducer elements forming method.
Background technology
Double frequency or multifrequency multiplexing are the new technologies in modern radar antenna works, it can simplify design, simplify equipment, improve
Performance.Double frequency or multifrequency multiplex antenna have had been enter into the ripe application stage in western developed country, and landsat, communication,
The fields such as military communication promote and apply rapidly, but external to China's implementation technology blockage.Double-colored subreflector (has frequency selection
Property frequency selective surface FFS) be critical component in double frequency or multifrequency multiplexing technology, require to be totally reflected in certain wave bands, and
Full impregnated mistake is required in certain wave bands.Curved surface layered transducer elements forming technique is the key technology of double-colored subreflector successful application.
Due to the presence of metallic pattern oscillator, to frequency selective surface FFS in telecommunication design, test and structure design, work
Skill making is proposed high requirement.Domestic research predominantly stay in containing single layer frequency selective surface or sample design, processing,
The experiment of electrical measurement etc. and the research of FSS array fabrication process.And it is in conceptual phase mostly, the seldom of practicality is put into,
Sample and performance test research are mainly designed, and sample is that plane or small size are in the majority.Planar shaped layered transducer elements hold
It is easy to manufacture, but be not suitable for antenna subreflector, antenna subreflector is mostly according to the determination of main reflector curved surface and its
Adaptable curve form, plane is unable to reach its reflection and requires.
Retrieval and investigation of the same trade are crossed, it is understood that UAV research institute of Nanjing Aero-Space University is to millimeter
The duplex on wave/infrared frequency selection surface is studied, and flat-plate pore-opening type metal FSS screens have been made.Middle electric 14 are developed
Single layer cross-shaped oscillator array frequency-selective surfaces antenna subreflector, diameter 360mm；Xi’an Branch of the space flight Fifth Academy of Aerospace Industry devises one
The individual layer annulus oscillation of a diameter 300mm selects subreflector；Middle electric 54 succeed in developing the more of diameter 520mm within 2014
Frequency selectivity antenna subreflector, single layer " return " font layered transducer elements.But these researchs are all to use single layer layered transducer elements.It wants
It realizes two-band, high-isolation requirement must be met, i.e., it is as small as possible to the frequency requirement transmission loss transmitted, or even do not generate
Reflection, and high reflection is then required the frequency to be reflected as possible, transfer impedance is the bigger the better.The frequency of single layer layered transducer elements structure
Selection face is difficult the requirement for taking into account two frequency range insertion loss will be small, and single layer layered transducer elements band separation wants larger,
Reflection bandwidth is narrower.
And the manufacturing process of FSS subreflectors itself also has great difficulty, foreign countries once to have document to declare FSS subreflectors
Inherently a kind of self-protection of manufacturing process difficulty does not have to patent protection.Usual layered transducer elements molding is first in carrier
Upper plating (can the covering copper foil of plane) uses chemical etching or laser processing to be molded afterwards, and for FSS subreflectors,
Layered transducer elements are on curved surface, so copper-surfaced foil mode can not be used, and subreflector size is bigger, also should not the side of plating
Formula, larger additionally, due to subreflector curvature, current technology can not also carry out Bent exposure plate-making.So the country does not have still at present
The double-deck layered transducer elements forming method in effective and practical FSS subreflectors.
Invention content
In order to solve the problems existing in the prior art, the relevant technologies block is broken through, applicant proposes in the present patent application
A kind of large-scale curved double-deck layered transducer elements forming method, uses plane copper-clad plate technology to make high-precision double annulus and shakes first
Secondly son is molded layered transducer elements carrier, and according to the electrical performance demands of double-colored subreflector, by analogue simulation, calculates instead
It pushes away and experimental test, determines oscillator position and spacing parameter in layered transducer elements, pass through digital control processing on layered transducer elements carrier
Location hole, then step pin is used, it is accurately positioned to inside and outside two layers of different parameters oscillator；Finally oscillator unit gluing is fixed on
On carrier, and it is coated with oscillator unit protective layer, to form curved surface bilayer layered transducer elements.
The technical scheme is that：
The large-scale curved double-deck layered transducer elements forming method of described one kind, it is characterised in that：Include the following steps：
Step 1：Double circle-ring vibrator units are made using plane copper-clad plate technology：
Step 1.1：Plane copper-clad plate is made, copper-clad plate uses polytetrafluoroethylene (PTFE) F4B-2 is as oscillator carrier；
Step 1.2：Several circle-ring vibrators double with one heart are processed in copper-clad plate using etch process, are formed several by polytetrafluoro
Ethylene F4The oscillator unit of concentric double circle-ring vibrator compositions on the oscillator carrier and oscillator carrier of B-2 materials；Oscillator unit point
To be arranged in the concave surface oscillator unit of double-colored subreflector concave surface and setting the convex surface oscillator unit on double-colored subreflector convex surface；
Step 1.3：In than concentric pair circle-ring vibrators of concentric double circle-ring vibrator center position processing of each oscillator unit
The small location hole of inner ring internal diameter；
Step 1.4：From all double circle-ring vibrator units under plane copper-clad plate punching；
Step 2：Make layered transducer elements carrier：
Step 2.1：According to the design requirement of double-colored subreflector and moulding process requirement, the secondary mold of bumps two is prepared；
Step 2.2：It is utilized respectively the secondary mold of bumps two and hot pressing is passed through using glass fiber reinforced epoxy resin prepreg
Tank-vacuum bag method is molded to obtain the male and fomale(M＆F) covering of layered transducer elements carrier；
Step 2.3：Using aramid fiber honeycomb sandwich construction, sandwich mould assembly is carried out on concave die, obtains aramid fiber bee
The layered transducer elements carrier of nest glass fibre epoxy composite material sandwich structure；
Step 3：According to the electrical performance demands of double-colored subreflector, the oscillator position in layered transducer elements and spacing ginseng are determined
Number, and according to oscillator position and spacing parameter, oscillator location hole is processed on layered transducer elements carrier；
Step 4：In the oscillator location hole processed several step pins, and be inserted on layered transducer elements carrier, step pin two
The size at end is matched with the location hole of concave surface oscillator unit itself and the convex surface oscillator unit location hole of itself respectively；
Step 5：Layered transducer elements carrier is placed on punch mold, convex surface oscillator unit is determined using step pin
Position, using instant drying adhesive by convex surface oscillator unit paving on the convex surface of layered transducer elements carrier；Layered transducer elements carrier is placed on again recessed
On mould mold, concave surface oscillator unit is positioned using step pin, concave surface oscillator unit paving is being shaken using instant drying adhesive
On the concave surface of subarray carrier；
Step 6：It is coated with oscillator unit protective layer in the convex-concave surface of the layered transducer elements carrier of the good oscillator unit of paving successively,
Obtain curved surface bilayer layered transducer elements.
Further preferred embodiment, the large-scale curved double-deck layered transducer elements forming method of described one kind, it is characterised in that：Step
The glass fiber plain cloth of two layers of 0.1mm thickness is coated in 6 using wet method, resin uses epoxy-resin systems, room temperature curing to be formed
Oscillator unit protective layer is used in combination epoxy resin to realize spillway hole sealing.
Further preferred embodiment, the large-scale curved double-deck layered transducer elements forming method of described one kind, it is characterised in that：It is described
The double-deck layered transducer elements are used for the double-colored subreflector of 1.33 meters of S/X band antennas bore；The oscillator carrier of oscillator unit in step 1
Thickness 0.2mm, oscillator copper thickness 0.05mm；In the oscillator unit of convex surface layered transducer elements, oscillator outer shroud outer diameter is
Bore diameter of outer ring isOutside diameter of inner ring isInner ring internal diameter isLocation hole dimensional accuracy isIn the oscillator unit of concave surface layered transducer elements, oscillator outer shroud outer diameter isBore diameter of outer ring is
Outside diameter of inner ring isInner ring internal diameter isLocation hole dimensional accuracy is
Advantageous effect
The present invention solves the molding problem of the large-scale curved double-deck layered transducer elements, has captured the molding pass of double-colored subreflector
Key technology realizes the production domesticization of the double-colored subreflector of the large-scale curved double-deck layered transducer elements.The double-colored pair processed using the technology
For reflector for S/X frequency ranges (S frequency ranges penetrate, the reflection of X frequency ranges), band separation is smaller, can draw in S-band single layer layered transducer elements
Impedance mismatching is played, adds second layer layered transducer elements at 1/4 wavelength in its rear, so that it may with resolved impedance spectroscopy mismatch problems, make reflection work
Make broadened bandwidth；The double-colored subreflector bore 1330mm of application, oscillator unit 12000, working condition is good at present.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination following accompanying drawings to embodiment
Obviously and it is readily appreciated that, wherein：
Fig. 1：Large-scale curved bilayer layered transducer elements moulding process flow process figure；
Fig. 2：Oscillator structure schematic diagram；
Fig. 3：Oscillator unit schematic diagram；
Fig. 4：Large-scale bilayer layered transducer elements structural schematic diagram.
Specific implementation mode
The embodiment of the present invention is described below in detail, the embodiment is exemplary, it is intended to for explaining the present invention, and
It is not considered as limiting the invention.
Large-scale curved bilayer layered transducer elements and its moulding process are to realize the key technology of the double-colored function of subreflector, this reality
The double-colored subreflector that the large-scale curved double-deck layered transducer elements in example are used for 1.33 meters of S/X band antennas bore is applied, S frequency ranges are saturating
It crosses, the reflection of X frequency ranges.
The large-scale curved double-deck layered transducer elements in the present embodiment, by the convex surface oscillator battle array for being arranged in double-colored subreflector convex surface
Arrange and be arranged in the concave surface layered transducer elements composition of double-colored subreflector concave surface.
The convex surface layered transducer elements and the concave surface layered transducer elements are made of several oscillator units, and convex surface oscillator battle array
The oscillator unit number of row is identical as the oscillator unit number of concave surface layered transducer elements.
The oscillator unit is made of oscillator carrier with the concentric double circle-ring vibrators for sticking on oscillator carrier surface.
Double circle-ring vibrators are as shown in Fig. 2, oscillator a) is double-colored subreflector convex surface oscillator with one heart；B) it is double-colored subreflector
Concave surface oscillator.Since two layers of oscillator is different relative to feed, primary reflection surface position, function is different, and the width of annulus, spacing are
It is different.In the present embodiment, convex surface oscillator outer shroud outer diameter isBore diameter of outer ring isOutside diameter of inner ring isInner ring internal diameter isConcave surface oscillator outer shroud outer diameter isBore diameter of outer ring isOutside diameter of inner ring
ForInner ring internal diameter is
And in order to be conducive to be molded, ensure that double annulus are concentric, and convenient for layered transducer elements molding positioning, first with copper-clad plate by oscillator
It is processed into paster vibrator unit, oscillator unit structural schematic diagram is shown in Fig. 3, oscillator carrier thickness 0.2mm, oscillator thickness 0.05mm.
Oscillator carrier uses polytetrafluoroethylene (PTFE) F4B-2；Double circle-ring vibrators cover copper foil etch-forming using oscillator carrier with one heart.Oscillator carrier
It is upper to have and the concentric location hole of concentric double circle-ring vibrators.
It in the present embodiment, is required according to double-colored subreflector electric function, uses and shake in the regions mid diameter 770mm of convex surface
Subarray, oscillator quantity 6000, diameter 770mm use surface metalation aluminium layer with exterior domain.And concave surface uses layered transducer elements,
Oscillator quantity 6000, peripheral region does not do metalized.
Two layers of oscillator correspondence is shown in Figure 4：
Coordinate system is established using double-colored subreflector convex surface bore edge plane as XOY plane, Z axis perpendicular to XOY plane, and
The excessively double-colored subreflector center of Z axis.The oscillator unit of convex surface layered transducer elements is corresponded with the oscillator unit of concave surface layered transducer elements；
For a certain oscillator unit of convex surface layered transducer elements, its double annulus with one heart is determined according to the electrical performance demands of double-colored subreflector
Oscillator centre point PaFeedforward feed phase center P corresponding with double-colored subreflector0The line P of pointaP0With Z axis angle α, and then really
Its fixed concentric double circle-ring vibrator centre point PaThe oscillator unit of coordinate and the corresponding concave surface layered transducer elements of the oscillator unit it is same
The double circle-ring vibrator centre point P of the heartbCoordinate；PbFor PaP0The intersection point of line and double-colored subreflector concave surface.
The moulding process of the above-mentioned large-scale curved double-deck layered transducer elements is as shown in Figure 1, include the following steps：
Step 1：Double circle-ring vibrator units are made using plane copper-clad plate technology：
Step 1.1：Plane copper-clad plate is made, copper-clad plate uses polytetrafluoroethylene (PTFE) F4B-2 is as oscillator carrier；Oscillator carrier
Thickness 0.2mm, copper thickness 0.05mm；
Step 1.2：Several circle-ring vibrators double with one heart are processed in copper-clad plate using etch process, are formed several by polytetrafluoro
Ethylene F4The oscillator unit of concentric double circle-ring vibrator compositions on the oscillator carrier and oscillator carrier of B-2 materials；Oscillator unit point
To be arranged in the concave surface oscillator unit of double-colored subreflector concave surface and setting the convex surface oscillator unit on double-colored subreflector convex surface；
Step 1.3：In than concentric pair circle-ring vibrators of concentric double circle-ring vibrator center position processing of each oscillator unit
The small location hole of inner ring internal diameter；Concave surface oscillator unit location hole dimensional accuracy isConvex surface oscillator unit location hole ruler
Very little precision is
Step 1.4：From all double circle-ring vibrator units under plane copper-clad plate punching；Oscillator unit shape size ratio is double round with one heart
Ring oscillator outer annular diameter is somewhat larger, in the carrier material as small as possible one for ensureing that the complete premise lower edge of metal oscillator stays
A bit.
Step 2：Make layered transducer elements carrier：Layered transducer elements carrier is fine using aramid fiber cellular glass according to electrical performance demands
Epoxy composite material sandwich is tieed up, is molded with autoclave-vacuum bag method：
Step 2.1：According to the design requirement of double-colored subreflector and moulding process requirement, the secondary mold of bumps two is prepared；Point
It Yong Yu be molded two layers of covering and paving oscillator unit and honeycomb sandwich construction mould assembly, patch die face is the outer surface of sandwich,
It is molded the surface of layered transducer elements；
Step 2.2：It is utilized respectively the secondary mold of bumps two, using glass fiber reinforced epoxy resin prepreg, thickness
0.25mm, is coated with by hand by four layers, is molded to obtain the male and fomale(M＆F) covering of layered transducer elements carrier by autoclave-vacuum bag method；
Step 2.3：Using aramid fiber honeycomb sandwich construction, sandwich mould assembly is carried out on concave die, obtains aramid fiber bee
The layered transducer elements carrier of nest glass fibre epoxy composite material sandwich structure.
Step 3：According to the electrical performance demands of double-colored subreflector, the oscillator position in layered transducer elements and spacing ginseng are determined
Number, and according to oscillator position and spacing parameter, oscillator location hole is processed on layered transducer elements carrier using numerical-control processing method, it is fixed
Position bore dia φ 3.
Step 4：In the oscillator location hole processed several step pins, and be inserted on layered transducer elements carrier, step pin one
End size beOther end size isThe size at both ends respectively with the location hole of concave surface oscillator unit itself and convex surface
The location hole of oscillator unit itself matches.
Step 5：Layered transducer elements carrier is placed on punch mold, convex surface oscillator unit is carried out using step pin small end
Positioning, using instant drying adhesive by convex surface oscillator unit paving on the convex surface of layered transducer elements carrier；The paving of convex surface oscillator unit is complete
Cheng Hou, then layered transducer elements carrier is placed on concave die, concave surface oscillator unit is positioned using step pin big end, profit
With instant drying adhesive by concave surface oscillator unit paving on the concave surface of layered transducer elements carrier.
Step 6：It is coated with two layers using wet method in the convex-concave surface of the layered transducer elements carrier of the good oscillator unit of paving successively
The glass fiber plain cloth of 0.1mm thickness, resin use epoxy-resin systems, room temperature curing to form oscillator unit protective layer, be used in combination
Epoxy resin realizes spillway hole sealing, can prevent moisture after handling in this way and enter sandwich influence electric property.Final
To curved surface bilayer layered transducer elements.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective
In the case of can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.
Claims (3)
1. a kind of large-scale curved double-deck layered transducer elements forming method, it is characterised in that：Include the following steps：
Step 1：Double circle-ring vibrator units are made using plane copper-clad plate technology：
Step 1.1：Plane copper-clad plate is made, copper-clad plate uses polytetrafluoroethylene (PTFE) F4B-2 is as oscillator carrier；
Step 1.2：Several circle-ring vibrators double with one heart are processed in copper-clad plate using etch process, are formed several by polytetrafluoroethylene (PTFE)
F4The oscillator unit of concentric double circle-ring vibrator compositions on the oscillator carrier and oscillator carrier of B-2 materials；Oscillator unit is divided into cloth
Set double-colored subreflector concave surface concave surface oscillator unit and set the convex surface oscillator unit on double-colored subreflector convex surface；
Step 1.3：In than concentric pair circle-ring vibrator inner ring of concentric double circle-ring vibrator center position processing of each oscillator unit
The small location hole of internal diameter；
Step 1.4：From all double circle-ring vibrator units under plane copper-clad plate punching；
Step 2：Make layered transducer elements carrier：
Step 2.1：According to the design requirement of double-colored subreflector and moulding process requirement, the secondary mold of bumps two is prepared；
Step 2.2：It is utilized respectively the secondary mold of bumps two and autoclave-is passed through using glass fiber reinforced epoxy resin prepreg
Vacuum bag method is molded to obtain the male and fomale(M＆F) covering of layered transducer elements carrier；
Step 2.3：Using aramid fiber honeycomb sandwich construction, sandwich mould assembly is carried out on concave die, obtains aramid fiber honeycomb glass
The layered transducer elements carrier of glass fiber epoxy composite material sandwich；
Step 3：According to the electrical performance demands of double-colored subreflector, oscillator position and the spacing parameter in layered transducer elements are determined,
And according to oscillator position and spacing parameter, oscillator location hole is processed on layered transducer elements carrier；
Step 4：In the oscillator location hole processed several step pins, and be inserted on layered transducer elements carrier, step pin both ends
Size is matched with the location hole of concave surface oscillator unit itself and the convex surface oscillator unit location hole of itself respectively；
Step 5：Layered transducer elements carrier is placed on punch mold, convex surface oscillator unit is positioned using step pin, profit
With instant drying adhesive by convex surface oscillator unit paving on the convex surface of layered transducer elements carrier；Layered transducer elements carrier is placed on concave die again
On, concave surface oscillator unit is positioned using step pin, using instant drying adhesive by concave surface oscillator unit paving in layered transducer elements
On the concave surface of carrier；
Step 6：It is coated with oscillator unit protective layer in the convex-concave surface of the layered transducer elements carrier of the good oscillator unit of paving successively, is obtained
Curved surface bilayer layered transducer elements.
2. a kind of large-scale curved double-deck layered transducer elements forming method according to claim 1, it is characterised in that：It is adopted in step 6
The glass fiber plain cloth of two layers of 0.1mm thickness is coated with wet method, resin uses epoxy-resin systems, room temperature curing to form oscillator list
First protective layer is used in combination epoxy resin to realize spillway hole sealing.
3. the large-scale curved double-deck layered transducer elements forming method of one kind according to claim 1 or claim 2, it is characterised in that：It is described double
Layer layered transducer elements are used for the double-colored subreflector of 1.33 meters of S/X band antennas bore；The oscillator carrier of oscillator unit is thick in step 1
Spend 0.2mm, oscillator copper thickness 0.05mm；In the oscillator unit of convex surface layered transducer elements, oscillator outer shroud outer diameter isOutside
Ring internal diameter isOutside diameter of inner ring isInner ring internal diameter isLocation hole dimensional accuracy isIn the oscillator unit of concave surface layered transducer elements, oscillator outer shroud outer diameter isBore diameter of outer ring is
Outside diameter of inner ring isInner ring internal diameter isLocation hole dimensional accuracy is
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| CN201810183769.XA CN108511917A (en) | 2018-03-06 | 2018-03-06 | A kind of large-scale curved double-deck layered transducer elements forming method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02299302A (en) * | 1989-05-12 | 1990-12-11 | Mitsubishi Electric Corp | Double reflection mirror antenna |
| CN103560329A (en) * | 2013-10-25 | 2014-02-05 | 中国电子科技集团公司第三十九研究所 | Method for manufacturing double-layer oscillator bi-color sub-reflector |
| CN206962022U (en) * | 2017-04-21 | 2018-02-02 | 南京信息工程大学 | Ka, W-waveband double frequency dual-linear polarization frequency-selective surfaces |
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2018
- 2018-03-06 CN CN201810183769.XA patent/CN108511917A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02299302A (en) * | 1989-05-12 | 1990-12-11 | Mitsubishi Electric Corp | Double reflection mirror antenna |
| CN103560329A (en) * | 2013-10-25 | 2014-02-05 | 中国电子科技集团公司第三十九研究所 | Method for manufacturing double-layer oscillator bi-color sub-reflector |
| CN206962022U (en) * | 2017-04-21 | 2018-02-02 | 南京信息工程大学 | Ka, W-waveband double frequency dual-linear polarization frequency-selective surfaces |
Non-Patent Citations (4)
| Title |
|---|
| IVOR L. MORROW，KEITH MORRISON: "A Low Profile Retrodirective Frequency Selective Surface for Radar Earth Observation", 《2015 LOUGHBOROUGH ANTENNAS & PROPAGATION CONFERENCE》 * |
| SANDIP SANKAR ROY，T.NAGA SEKHAR: "Design of Double Layers Dichroic Subreflector for S and X Band Cassegrain Antenna", 《2016 IEEE INDIAN ANTENNA WEEK》 * |
| 张东兴: "《聚合物基复合材料科学与工程》", 31 July 2017 * |
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