CN107529355B - A kind of satellite antenna wire netting manufacture method - Google Patents
A kind of satellite antenna wire netting manufacture methodInfo
- Publication number
- CN107529355B CN107529355B CN201418002779.1A CN201418002779A CN107529355B CN 107529355 B CN107529355 B CN 107529355B CN 201418002779 A CN201418002779 A CN 201418002779A CN 107529355 B CN107529355 B CN 107529355B
- Authority
- CN
- China
- Prior art keywords
- golden
- wire netting
- molybdenum filament
- gold
- molybdenum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- ZOKXTWBITQBERF-UHFFFAOYSA-N molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 41
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 41
- 239000011733 molybdenum Substances 0.000 claims abstract description 41
- 239000010931 gold Substances 0.000 claims abstract description 31
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052737 gold Inorganic materials 0.000 claims abstract description 30
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 16
- 239000011248 coating agent Substances 0.000 claims abstract description 13
- 238000000576 coating method Methods 0.000 claims abstract description 13
- 150000001875 compounds Chemical group 0.000 claims abstract description 6
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 4
- 239000010432 diamond Substances 0.000 claims abstract description 4
- 238000011176 pooling Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 15
- 238000002844 melting Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 description 6
- 238000009954 braiding Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 239000010937 tungsten Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 238000009941 weaving Methods 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 229920004933 Terylene® Polymers 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000009940 knitting Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 206010003402 Arthropod sting Diseases 0.000 description 1
- 210000004940 Nucleus Anatomy 0.000 description 1
- 210000004279 Orbit Anatomy 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229910001260 Pt alloy Inorganic materials 0.000 description 1
- 206010040844 Skin exfoliation Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 238000004299 exfoliation Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 210000001519 tissues Anatomy 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Abstract
A kind of satellite antenna wire netting manufacture method, step are as follows：(1) material of manufacture wire netting, the gold of mass percent >=99.5 and the molybdenum filament of mass percent >=99.9 are prepared；(2) using based on ermal physics it is compound cover golden method surface of molybdenum wire under coating gold obtain covering golden molybdenum filament, cover golden 15-30 μm of molybdenum filament diameter；(3) 2-7 roots are covered into golden molybdenum filament monofilament plying together, obtains metal strands；(4) metal strands after pooling capital in step (3) are woven into diamond mesh structures.
Description
Technical field
The present invention relates to a kind of satellite antenna wire netting manufacture method, suitable for different frequency range, different purposes
The demand of netted deployable space antenna.
Background technology
Netted deployable space large-scale antenna, it be high rail reconnaissance spacecraft, high rail moving communication satellite,
The key equipment of the spacecrafts such as survey of deep space satellite.These netted deployable antennas are folded up in transmitting,
Expansion reaches working condition after entering the orbit.As needed, the bore of these antenna is at several meters to tens meters, even
Rice up to a hundred.Large deployable antenna includes netted deployable antenna, solid face deployable antenna, paraballon etc.
Diversified forms.Gu face deployable antenna does not obtain actual answer because mechanism is complicated, expansion reliability is relatively low
With.Paraballon is still in development at present, without real in-orbit application.Therefore, at present both at home and abroad
Most widely used is netted deployable antenna, and more than ten meters of antenna is all netted deployable antenna.Xi'an
Branch takes to the development of Large deployable antenna from " 95 ", gos deep into degree, technology way from research
The realizability in footpath, reference to foreign study situation etc. consider, the Large Deployable day that China develops
Line form is based on the netted deployable antenna such as loop aerial and umbrella antenna, and in recent years, Chinese large-sized can open up
The fast development of Kaitian's line, high-performance, multi items, substantial amounts of demand are proposed to wire netting.
Wire netting is the critical material of netted deployable antenna, is the nucleus module to form microwave reflection face.Gold
Category net is the fabric construction product woven using 10-30 microns Gas in Ultra-thin Metal Wires by knitting warp mode.
In order to meet the needs of different frequency range antenna, the Metal wire material that the wire netting of different purposes uses is tied with braiding
Structure parameter is different.According to requirement on electric performance, frequency it is higher, it is necessary to mesh it is smaller, but in order to mitigate
Weight, mesh as big as possible is used when frequency range is relatively low generally on the basis of electrical property is met.
In addition to requirement on electric performance, it is also necessary to meet the requirement of its physical characteristic and mechanical performance：
Isotropism：Isotropism including mechanical performance and electric property；
Structural stability：Fault of construction can not spread；
Structural homogeneity：Mesh is uniform in size；
Structurally flexible：Softness, it is folding to be not easy to wrinkle trace；
Less fault：Fault will be lacked as far as possible caused by braiding process；
So far, the wire netting Patents that can be found are that u s company owns, as follows：
United States Patent (USP) US4609923 covers golden tungsten filament as raw material using a diameter of 10-38 μm, use machine number for
E20 tricot machines are woven into metal mesh opening cloth, as satellite antenna reflection surface material.Research shows to cover
Multifrequency nature possessed by golden tungsten filament covers golden tungsten filament so as to fit as satellite antenna reflection surface material
Density it is big, radiation resistance is poor.
United States Patent (USP) US4812854 has invented a kind of new Web materials and has been used for making antenna reflective face,
This net is formed by a kind of graphite fibre beam braiding for being coated with stress adsorption layer.With before cover golden tungsten
Silk wire netting is compared, and they think that the graphite fibre beam for covering gold weaves the warp knit mesh cloth formed in items
Can on improve, can be as the finer selection of antenna reflective face material.
United States Patent (USP) US4549187 have developed a kind of high intensity, low thermal coefficient of expansion, resistance to ag(e)ing, resistance to
The novel metal net materials of creep properties.The material is with a branch of yarn containing more amorphous silica fibres
Line is as matrix, the excellent metal level of outer layer spraying electric conductivity, metal level be generally gold, silver, copper or
Aluminium.
United States Patent (USP) US4868580 and US4926910 are knitted using a kind of woven grid of lace stitch structure
Reflecting surface material of the thing as satellite antenna.Yarn used is covering yarn structure, a diameter of 25.4 μm of heart yarn
Wire, be respectively 55 denier Buddhist nuns by two fineness of both direction looping clockwise, counterclockwise in its outer layer
Your yarn, and the yarn is non-conducting material.Found by the contrast to multiple material performance, diameter
For 25.4 μm of platinum/copper alloy silk or the Tynex beam of a diameter of 30.5 μm of filamentary silver and 55 daniers
Complex yarn is combined into, operating temperature of the net fibric that the yarn weaving forms at -150 DEG C to 100 DEG C
In section, its thermal coefficient of expansion is close to zero.
United States Patent (USP) US5421376, US5456779, US5458162 have invented a kind of new mesh and knitted
Thing is used as the mesh materials of satellite antenna, the fabric uses and lace stitch structure.Heart yarn is by one
The excellent filling yarn composition of wire and a tensile property of the root with insulating barrier, fasciated yarn is in addition
A piece tension yarn, the pitch of looping 10 with per inch is optimal.Wire is 10 μm -38 μm straight
The platinum in footpath/copper alloy silk, yarn and fasciated yarn are filled respectively from 125 daniers and the terylene of 70 daniers
Silk.To avoid wire side because contacting with each other for wire produces passive intermodulation phenomenon, and also to change
The mechanical property of kind wire, in its layer insulating of surface spraying one, the thickness of the insulating barrier typically exists
Between 7.6 μm -12.7 μm.In addition, the outer layer of covering yarn is also coated with one layer of opaque silica gel, with protection
Decomposition of the terylene from space ultraviolet.
The content of the invention
The technology of the present invention solves problem：A kind of overcome the deficiencies in the prior art, there is provided satellite antenna metal
Net manufacture method.
The present invention technical solution be：A kind of satellite antenna wire netting manufacture method, step are as follows：
(1) material of manufacture wire netting is prepared, the gold and mass percent of mass percent >=99.5 >=
99.9 molybdenum filament；
(2) using based on ermal physics it is compound cover golden method surface of molybdenum wire under coating gold obtain covering golden molybdenum filament, cover
Golden 15-30 μm of molybdenum filament diameter；
(3) 2-7 roots are covered into golden molybdenum filament monofilament plying together, obtains metal strands；
(4) metal strands after pooling capital in step (3) are woven into diamond mesh structures.
Golden thickness is covered in the step (2) for 0.2~0.5 μm.
Plying in the step (3) twists stranding process with one heart using tubular type.
Laying tension control is in 5-10g during technique plying.
The present invention has the beneficial effect that compared with prior art：
(1) present invention provides is covered golden molybdenum filament and is made and has mesh fine uniform, excellent machinery by ultra-fine
The production method of stability and reflexive warp knit metal mesh fabric, the wire netting not only have it is in light weight,
Wire side elasticity is good, pliability is good and the advantages that loosing-resistant, and with excellent tensile strength, respectively to
The same sex, the stability of structure, can folding property, work stability and reliability of taking down the exhibits and reflecting effect, it is main
It is used for Large Deployable satellite antenna reflection surface, working frequency range covering UHF-Ka, at present multiple
It is applied in satellite task.
Brief description of the drawings
Fig. 1 is the low frequency and electric metal net pattern that the present invention develops；
Fig. 2 is the two kinds of method for preparing layer gold contrasts；
Fig. 3 compares for a variety of golden molybdenum filament methods of pooling capital of covering；
Fig. 4 is double comb openings through forging tissue loop construction schematic diagram；
Fig. 5 is the method schematic diagram of increase side yarn process.
Embodiment
Content of the present invention includes ultra-fine covering golden molybdenum filament generation method, covering the generation of golden molybdenum filament metal strands
Method and the wire netting braiding generation method three parts using metal strands.
(1) it is ultra-fine to cover golden molybdenum filament generation method
In present invention, it is desirable to manufacturing a diameter of 15-30 μm of superfine metal composite filaments, surface material is Huang
Gold, core are molybdenum.
● composition
Top layer：Gold, coating thickness are 0.2~0.5 μm, in terms of quality %, are contained：
Au：≥99.5
Fe：≤0.003
Pb：≤0.002
Sb：≤0.002
Bi：≤0.002
Core molybdenum, in terms of quality %, contain：
Mo：≥99.9
C：≤0.01
N：≤0.002
Fe：≤0.01
Ni：≤0.005
O：≤0.02
● layer gold implementation method
Coating is traditionally prepared using the method for electroless plating, its advantage is：Thickness of coating is easily controllable and uniform
Property is preferable.Its shortcoming is：Coating is relatively more loose, and wearability is poor (it is possible that netting process falls gold
The phenomenon of powder)；Be difficult to prevent residual of the electroplate liquid in coating, when coating is heated, electroplating residual thing by
Thermal expansion, cause coating bulge or even make plating exfoliation；Remain in electroplating residual thing and the storage of coating surface
Medium interaction in (or use) environment, make to cover golden surface of molybdenum wire under discoloration；Spent plating bath is protected to environment
It is unfavorable to protect.
Layer gold proposed by the present invention realizes that technique is different from traditional chemical method, employs and is answered based on ermal physics
That closes covers golden method, and the mechanism of this method is：Thin molybdenum filament continues through the gold of melting, is coagulated in surface of molybdenum wire under
Solid is into true yellow layer gold.Thin molybdenum filament continues through the gold of melting, solidifies to form true yellow layer gold in surface of molybdenum wire under.
As can be seen that liquid gold has preferable wetability on molybdenum and can formed solid from Au-Mo binary phase diagramls
Solution, 1.25% can be reached in solid solubility of 1054 DEG C of gold in molybdenum.Temperature when covering gold process is in gold
Fusing point nearby i.e. 1060 DEG C, so using physics cladding process prepare cover golden molybdenum filament between layer gold and core
There can be a solid solution transition zone, layer gold and core have good adhesion.Fig. 2 lists above-mentioned respectively
Two kinds of contrasts for preparing layer gold method, hence it is evident that it can be seen that proposed by the present invention cover gold side based on ermal physics are compound
Method is better than traditional chemical plating method.
● performance (based on ermal physics it is compound cover the generation of golden method cover golden molybdenum filament)
Pull-off force：≥85g(30μm)
≥35g(15μm)
Elongation percentage：>=1.2%
Diameter：15-30μm
Friction test coating non-scale, peel off.
Product surface cleans, and bubble-free, corrosion, burr, leakage are covered, folding line, joint.
Coating can bear+250 DEG C~-196 DEG C of high/low temperature thermal shock.
(2) golden molybdenum filament metal strands generation method is covered
The present invention twists stranding process with one heart using tubular type, and 2-7 roots are covered into golden molybdenum filament monofilament plying together.Institute
Twisted wire refers to that there are single or several single lines at center to meaning tubular type with one heart, and other single lines are stranded in center from level to level
Around line, the twisted wire direction of adjacent twisted layer can conversely can also be identical, the single line itself of surrounding can turn
It is dynamic.Fig. 3 lists a variety of different silk material plying modes, from the figure, it can be seen that using strand twisted wire with one heart
The metal stock silk twist of technique plying and, plying it is close, hence it is evident that be better than other plying modes.
The realization that tubular type twists stranding process with one heart is needed by means of tube-type line strander, such as can use current city
The tube-type line strander of XX models on field.It is of the invention right in order to preferably meet the plying requirement of Gas in Ultra-thin Metal Wires
The key mechanism of current existing tube-type line strander carries out following optimization design：
● reduce draw drum tension force, laying tension is controlled in 5-10g.
● draw drum and the optimization of wire cabling, optimal height of C.G. is set according to different draw drum sizes,
By distinguishing cabling in mandrel and tube wall, twisted wire structural homogeneity is improved, makes the twist direction of each stock monofilament
Angle and being consistent property of twist contraction degree.
● transmission parts use ceramic base guide wheel, reduce the abrasion that friction member covers layer gold to wire.
● take known balance oscillating rod type tensioner, control lead tension force, coiling tension and coiling speed.
● according to the single different fineness for covering golden molybdenum filament wire, using different lays and twisted wire speed, make
Obtain metal strands intensity and elongation reaches optimal.
(3) wire netting braiding generation method
It in working width is 3.3m that wire netting, which is, in this example, and machine number is what is woven on E16 tricot machine,
Institutional framework is double comb opening warp sateens.2 are at least equipped with sley bar, it is empty that front and rear two sley bars wear 1 using 1
Three row opening atlas laps, when band yarn turns to using remaining silent coil, and it is middle be then open stich.
Front and rear comb does symmetrical band yarn motion, forms diamond mesh structures, and the mesh symmetry that this structure is formed is preferable,
And the diameter of general mesh is bigger, the institutional framework of low frequency molybdenum filament wire netting is suitable as, as Fig. 4 is
The coil structure of double comb opening satins, band yarn number are：Preceding comb：1-0,1-2,2-3,2-1//after
Comb：2-3,2-1,1-0,1-2//.The grid of formation is diamond-shaped meshes, aperture size 2-5mm, specific work
Skill parameter is shown in Table 2.
The metallic mesh fabric technological parameter of table 2
In weaving process, wire netting can produce the opening of contraction, particularly low frequency net by drawing and winding device
Satin, side yarn drawing tension force deficiency is caused, " cissing " phenomenon is easily produced, has a strong impact on woven
It is smoothed out.In order to solve this problem, using increase side yarn process method, as shown in Figure 5.In gold
Belong to network edge position, 2 pieces of knitting needles of ragged edge are removed at A2, A1, are normally entried at B, and at C
A catch end is padded, yarn send yarn using passive type at C.Woven with this method, then in rectangle frame
A2, A1 do not form wale, only form wale in A3 stringers, and due to using the passive type warp let-off,
Side yarn forms a coils and normal yarn every 3 rows at A3 and lockstitched a border in A3 stringers, finally in A3
Place forms smooth plain edge effect.
For different needs, using above-mentioned weaving, according to different pore sizes, will can cover
Golden molybdenum filament metal strands are woven into that low frequency covers golden molybdenum filament net (UHF-S) and high frequency covers golden molybdenum filament net (C-Ka),
Main technical indicator is shown in Table 1.
The technical indicator of molybdenum filament net near the low frequency of table 1 and high frequency
Fig. 1 is the low frequency and electric metal net using above-mentioned technique development, and electric performance test is carried out to it, is surveyed
Test result shows that main performance index test result meets to require.
It is only presently preferred embodiments of the present invention in summary, is not used for limiting the implementation model of the present invention
Enclose.The equivalent changes and modifications that i.e. all contents according in scope of the present invention patent are made, it all should be this
The technology category of invention.
Claims (4)
1. a kind of satellite antenna wire netting manufacture method, it is characterised in that step is as follows：
(1) material of manufacture wire netting is prepared, the gold and mass percent of mass percent >=99.5 >=
99.9 molybdenum filament；
(2) using based on ermal physics it is compound cover golden method surface of molybdenum wire under coating gold obtain covering golden molybdenum filament, cover
Golden 15-30 μm of molybdenum filament diameter；Described ermal physics are compound to be covered golden method mechanism and continues through melting for molybdenum filament
Gold, solidify to form true yellow layer gold in surface of molybdenum wire under；
(3) 2-7 roots are covered into golden molybdenum filament monofilament plying together, obtains metal strands；
(4) metal strands after pooling capital in step (3) are woven into diamond mesh structures.
A kind of 2. satellite antenna wire netting manufacture method according to claim 1, it is characterised in that：Institute
State and golden thickness is covered in step (2) for 0.2~0.5 μm.
A kind of 3. satellite antenna wire netting manufacture method according to claim 1, it is characterised in that：Institute
The plying stated in step (3) twists stranding process with one heart using tubular type.
A kind of 4. satellite antenna wire netting manufacture method according to claim 3, it is characterised in that：Work
Laying tension control is in 5-10g during skill plying.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107529355B true CN107529355B (en) | 2016-06-22 |
Family
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109518110A (en) * | 2018-11-30 | 2019-03-26 | 烟台元泰金属材料技术有限公司 | A kind of braiding space-vehicle antenna net ultra-fine dilute/noble metal composite filament and preparation method thereof |
| CN110474145A (en) * | 2019-07-24 | 2019-11-19 | 西安空间无线电技术研究所 | A kind of novel low PIM umbrella antenna |
| CN110777462A (en) * | 2019-10-23 | 2020-02-11 | 西安空间无线电技术研究所 | Method and device for preparing medium wire wrapped low-passive intermodulation metal mesh wire |
| CN111691030A (en) * | 2019-03-12 | 2020-09-22 | 财团法人纺织产业综合研究所 | Method for manufacturing conductive yarn |
| CN113366163A (en) * | 2019-01-28 | 2021-09-07 | 国立研究开发法人宇宙航空研究开发机构 | Grid structure, antenna reflector, electromagnetic shield, waveguide, and method for manufacturing grid structure |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109518110A (en) * | 2018-11-30 | 2019-03-26 | 烟台元泰金属材料技术有限公司 | A kind of braiding space-vehicle antenna net ultra-fine dilute/noble metal composite filament and preparation method thereof |
| CN113366163A (en) * | 2019-01-28 | 2021-09-07 | 国立研究开发法人宇宙航空研究开发机构 | Grid structure, antenna reflector, electromagnetic shield, waveguide, and method for manufacturing grid structure |
| CN111691030A (en) * | 2019-03-12 | 2020-09-22 | 财团法人纺织产业综合研究所 | Method for manufacturing conductive yarn |
| CN111691030B (en) * | 2019-03-12 | 2022-03-08 | 财团法人纺织产业综合研究所 | Method for manufacturing conductive yarn |
| CN110474145A (en) * | 2019-07-24 | 2019-11-19 | 西安空间无线电技术研究所 | A kind of novel low PIM umbrella antenna |
| CN110474145B (en) * | 2019-07-24 | 2020-11-20 | 西安空间无线电技术研究所 | Novel low PIM umbrella antenna |
| CN110777462A (en) * | 2019-10-23 | 2020-02-11 | 西安空间无线电技术研究所 | Method and device for preparing medium wire wrapped low-passive intermodulation metal mesh wire |
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