JPH02154499A - Electromagnetic wave reflector - Google Patents
Electromagnetic wave reflectorInfo
- Publication number
- JPH02154499A JPH02154499A JP30815488A JP30815488A JPH02154499A JP H02154499 A JPH02154499 A JP H02154499A JP 30815488 A JP30815488 A JP 30815488A JP 30815488 A JP30815488 A JP 30815488A JP H02154499 A JPH02154499 A JP H02154499A
- Authority
- JP
- Japan
- Prior art keywords
- electromagnetic wave
- reflecting material
- particles
- backup material
- backup
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 claims abstract description 56
- 239000002245 particle Substances 0.000 claims abstract description 20
- 239000011230 binding agent Substances 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 6
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 6
- 239000000057 synthetic resin Substances 0.000 claims abstract description 6
- 239000011888 foil Substances 0.000 abstract description 12
- 229910052782 aluminium Inorganic materials 0.000 abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 10
- 229920005989 resin Polymers 0.000 abstract description 9
- 239000011347 resin Substances 0.000 abstract description 9
- 229920001187 thermosetting polymer Polymers 0.000 abstract description 8
- 239000002131 composite material Substances 0.000 abstract description 7
- 239000003677 Sheet moulding compound Substances 0.000 abstract description 4
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000011241 protective layer Substances 0.000 abstract description 2
- 101100365998 Caenorhabditis elegans smc-6 gene Proteins 0.000 abstract 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 11
- 230000001070 adhesive effect Effects 0.000 description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 229920005992 thermoplastic resin Polymers 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000004412 Bulk moulding compound Substances 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 101000702566 Homo sapiens Structural maintenance of chromosomes protein 6 Proteins 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 102100031030 Structural maintenance of chromosomes protein 6 Human genes 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 244000137852 Petrea volubilis Species 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- ZADYMNAVLSWLEQ-UHFFFAOYSA-N magnesium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[Mg+2].[Si+4] ZADYMNAVLSWLEQ-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業−にの利用分野〕
この発明は、衛星放送受信用や通信用、或いはコンピュ
ータ、ファクシミリ、複写機、プリンタ、計測器等のシ
ールドケース用、さらには自動車のランプハウジング用
や外板用等の電磁波反射体に関する。[Detailed Description of the Invention] [Field of Industrial Application] This invention is applicable to satellite broadcast reception, communications, shield cases for computers, facsimile machines, copiers, printers, measuring instruments, etc., and furthermore, for automobile lamps. Related to electromagnetic wave reflectors for housings, outer panels, etc.
アルミニウム、銅、鉄等の金属箔等から電磁波反射材を
成形し、この反射材の裏面に合成樹脂製のバックアップ
材を接着・結合したものが知られている。It is known that an electromagnetic wave reflecting material is molded from metal foil such as aluminum, copper, iron, etc., and a backup material made of synthetic resin is bonded and bonded to the back side of this reflecting material.
例えば、パラボラアンテナの場合、熱可塑性樹脂フィル
ムを予め電磁波反射材にラミネートしておき、このラミ
ネートされたフィル１１を加熱してバックアップ材に融
着させたものや、熱硬化性樹脂を電磁波反射材にコーテ
ィングし、この熱硬化性樹脂を半硬化状態に保つかプラ
イマー等によりバックアップ材と一体成形したもの、あ
るいは電磁波反射材とバックアップ材との結合にテトラ
−フィルムを使用したもの等が知られている。For example, in the case of a parabolic antenna, a thermoplastic resin film is laminated with an electromagnetic wave reflecting material in advance, and this laminated film 11 is heated and fused to the backup material, or a thermosetting resin is laminated with an electromagnetic wave reflecting material. Some known methods include coating the thermosetting resin with a semi-cured state or integrally molding it with a backup material using a primer, or using Tetra film to bond the electromagnetic wave reflecting material and the backup material. There is.
パラボラアンテナやランプハウジング等のような三次元
形状を有する電磁波反射体では、電磁波反射体とバック
アップ材の一方又は両方を成形した後に両者の接着・結
合を図るため及び一方を予め成形した後に加熱圧着する
ときに成形された形状に均一に温度や圧力をかけること
が難しいために機械化・自動化が困難であった。For electromagnetic wave reflectors that have a three-dimensional shape such as parabolic antennas and lamp housings, one or both of the electromagnetic wave reflector and the backup material are molded and then the two are bonded and bonded, and one of them is pre-formed and then heat pressure bonded. Mechanization and automation have been difficult because it is difficult to uniformly apply temperature and pressure to the formed shape during the process.
また、バックアップ材として熱硬化性樹脂を使用し、こ
れを熱可塑性樹脂のフィルムがラミネトされた電磁波反
射材に一体成形する場合、フィルムの溶融等により部分
的なフクレ、収縮によるムラ等が生じて体裁を損い、製
品価値を低下させていた。In addition, when thermosetting resin is used as a backup material and it is integrally molded into an electromagnetic wave reflecting material laminated with a thermoplastic resin film, partial blisters due to melting of the film, unevenness due to shrinkage, etc. may occur. It spoiled the appearance and reduced the product value.
さらに、熱硬化性樹脂を電磁波反射材にコーティングし
たものでは、樹脂をル硬化状態に保つことはポットライ
フに制限があったり、やや硬化状態が進むと接着強度に
問題が生ずるという不都合があった。さらにまた、テト
ラ−フィルトの使用は、コスト的に高くついてしまうと
いう難点があった。Furthermore, with thermosetting resin coated with an electromagnetic wave reflecting material, there are disadvantages such as the pot life being limited by keeping the resin in a cured state, and problems with adhesive strength occurring when the resin is cured a little further. . Furthermore, the use of tetrafilt has the disadvantage of being expensive.
そこで、この発明は安価に製造することができ、電磁波
反射材とバックアップ材（熱硬化性、熱可塑性のいずれ
の樹脂であっても良い）とが強固に接着・結合された電
磁波反射体を提供することを目的とする。Therefore, the present invention provides an electromagnetic wave reflector that can be manufactured at low cost and in which an electromagnetic wave reflector and a backup material (which may be either thermosetting or thermoplastic resin) are firmly bonded and combined. The purpose is to
〔課題を解決するだめの手段］
」二連の目的を達成するため、この発明は、金属製の電
磁波反射材と合成樹脂製のバックアップ材とを多数の粒
体を含む結合剤で結合したものである。[Means for Solving the Problems] In order to achieve the two objectives, the present invention combines a metal electromagnetic wave reflecting material and a synthetic resin backup material with a binder containing a large number of particles. It is.
電磁波反射材とバックアップ材との間の結合剤の層内に
は粒体が介在し、粒体を含むことにより投鋲効果が生じ
て画材の結合強度が高まる。粒体は、合成樹脂製のバッ
クアップ材に一部埋没して結合材とバックアップ材との
接着面積を増大させる。Particles are present in the binder layer between the electromagnetic wave reflecting material and the backup material, and the inclusion of the particles produces a rivet effect and increases the bonding strength of the art material. The particles are partially embedded in the synthetic resin backup material to increase the adhesion area between the binding material and the backup material.
以下にこの発明の好適な実施例を図面を参照にして説明
する。Preferred embodiments of the present invention will be described below with reference to the drawings.
第１図において、アルミニラ１．箔等の金属製の電磁波
反射材１に粒体２を熱硬化性樹脂の結合剤３を介して結
合させ、電磁波反射材１の他面側には表面保護層４を成
形した複合シート５を所定の形状に予備成形する。この
ように予備成形された複合シート５を第２図に示すよう
に金型１０の一方の型１０Ａにセットし、この型１０Ａ
にセットされた複合シート５にＳＭＣ（シートモールデ
イングコンパウンド）６を金型１０内に投入し７、型１
０Ａ、ＩＯＢを閉じることにより加圧圧縮成形する。Ｓ
ＭＣ６は硬化してＦＲＰ製のバックアップ材７となり、
反射材１と一体化した電磁波反射体（この実施例ではパ
ラボラアンテナ）を成形する。In FIG. 1, aluminum 1. Particles 2 are bonded to a metal electromagnetic wave reflecting material 1 such as foil via a thermosetting resin binder 3, and a composite sheet 5 on which a surface protective layer 4 is formed is formed on the other side of the electromagnetic wave reflecting material 1. Preform into a predetermined shape. The composite sheet 5 preformed in this way is set in one mold 10A of the mold 10 as shown in FIG.
SMC (sheet molding compound) 6 is put into the mold 10 on the composite sheet 5 set in the mold 10.
Pressure compression molding is performed by closing 0A and IOB. S
MC6 hardens and becomes FRP backup material 7,
An electromagnetic wave reflector (parabolic antenna in this embodiment) integrated with the reflector 1 is molded.
粒体２としては、水酸化アルミニウム、水酸化マグネシ
ウム、炭酸カルシラノ・、炭酸マグネシウム、塩化亜鉛
、酸化マグネシウム、珪酸アルミニウム（クレー）、珪
酸マグネシウム（タルク）。The granules 2 include aluminum hydroxide, magnesium hydroxide, calcilanocarbonate, magnesium carbonate, zinc chloride, magnesium oxide, aluminum silicate (clay), and magnesium silicate (talc).
珪酸カルシウム、けい砂、珪藻土、含水ケイ酸化物、酸
化チタン、マイカ等またはバルン状粒体としてガラスバ
ルン、フライアッシュバルン、シラスバルン等があり、
粒体の平均粒径は１〜１００ミクロンであることが好ま
しい。また、粒体２は単位面積当り５０％以上の範囲内
が好適である。Calcium silicate, silica sand, diatomaceous earth, hydrated silicic oxide, titanium oxide, mica, etc., and balloon-shaped particles such as glass balloons, fly ash balloons, shirasu balloons, etc.
The average particle size of the particles is preferably 1 to 100 microns. Further, it is preferable that the grain size 2 is within the range of 50% or more per unit area.
図示した実施例においては、結合剤３として熱硬化性樹
脂を用いたが熱可塑性樹脂であっても良Ｇ１ｏまた、バ
ックアップ材７の材料としてＳＭＣ６を用いたがＢＭＣ
（バルクモールディングコンパウンド）や熱可塑性樹脂
であっても良い。In the illustrated embodiment, a thermosetting resin was used as the binder 3, but a thermoplastic resin may also be used.Also, SMC6 was used as the material for the backup material 7, but BMC
(bulk molding compound) or thermoplastic resin.
具体例１
平均粒径約４０ミクロンの中空ガラスピーズをエポキシ
系バインダによって３０ミクロン厚さの軟質アルミニウ
ム箔片面に接着したセラポリドＤ（商標名）を用い、ガ
ラスピーズを敷き詰めた面をバックアップ材７との接着
側とした。バックアップ材７としてはＳＭＣ６を用い、
４５型オフセツ） ＩＪフレクター金型内にて加熱圧縮
一体成形を行い、厚みが約３ｍｍの成形品を得た。成形
条件は、面圧５０ｋｇ／ｃｄ、温度１４０℃にて３分間
キープした。得られた成形品は、フクレやムラもなく表
面性に優れ、アルミニウム箔の接着剥離強度は約１ｋｇ
ｆ／２５ｍｍであった。Specific Example 1 Using Ceraporide D (trade name), in which hollow glass beads with an average particle size of approximately 40 microns are adhered to one side of a 30 micron thick soft aluminum foil using an epoxy binder, the surface covered with glass beads is used as backup material 7. The adhesive side was SMC6 is used as the backup material 7,
45 type offset) Heat compression integral molding was performed in an IJ flexor mold to obtain a molded product with a thickness of about 3 mm. The molding conditions were a surface pressure of 50 kg/cd and a temperature of 140° C., which were maintained for 3 minutes. The obtained molded product has excellent surface properties with no blisters or unevenness, and the adhesive peel strength of the aluminum foil is approximately 1 kg.
It was f/25mm.
具体例２
平均粒径約３０ミクロンの砂をフェノール系バインダー
にて１００ミクロンの厚さの軟質アルミニウム箔片面に
接着した。これは＃３２０ザンドペーパー相当のアルミ
ニウム箔である。この砂を敷き詰めた面をバックアップ
材７との接着側とした。具体例１と同様にして４５型オ
フセツ） ＩＪフレフターを成形した。得られた成形品
は、表面性に優れ、アルミニウム箔の接着剥離強度は約
２ｋｇｆ ／ ２５ ｍｍ以上と良好であった。Specific Example 2 Sand having an average particle size of about 30 microns was adhered to one side of a 100 micron thick soft aluminum foil using a phenolic binder. This is aluminum foil equivalent to #320 sand paper. The surface covered with this sand was used as the adhesive side with the backup material 7. A 45-type offset IJ flutter was molded in the same manner as in Example 1. The obtained molded product had excellent surface properties, and the adhesive peel strength of the aluminum foil was about 2 kgf/25 mm or more, which was good.
具体例３
平均粒径約３〜４ミクロンの炭酸カルシウムを含むポリ
プロ系のフィルｌ、 （約７０ミクロン厚さ）をウレタ
ン系接着剤を用い軟質アルミニウム箔（約１００ミクロ
ン厚さ）とドライラミネートした。このラミネート箔の
ポリプロ面をバックアップ材７との接着側とした。具体
例１と同様にして４５型オフセットリフレクタ−を成形
した。得られた成形品は表面性に優れアルミニラｌ、箔
の接着剥離強度は約３ ｋｇ ｆ ／ ２５ ｍｍ以上
と良好であった。Specific Example 3 A polypropylene film (about 70 microns thick) containing calcium carbonate with an average particle size of about 3 to 4 microns was dry laminated with a soft aluminum foil (about 100 microns thick) using a urethane adhesive. . The polypropylene surface of this laminate foil was used as the adhesive side to the backup material 7. A 45-type offset reflector was molded in the same manner as in Example 1. The obtained molded product had excellent surface properties and had a good adhesive peel strength of about 3 kg f/25 mm or more between aluminum foil and foil.
以上説明したように、この発明によれば、金属性の電磁
波反射材と合成樹脂性のバックアップ材とを多数の粒体
を含む結合剤で結合したので、粒体がバックアップ材の
中に一部埋没し、接着面積を増大して、バックアップ材
と電磁波反射材との接着強度を増大させることができた
。また、極狛て容易に所定の立体形状を有する電磁波反
射体を安価に製造することができる。As explained above, according to the present invention, the metallic electromagnetic wave reflecting material and the synthetic resin backup material are bonded together using a binder containing a large number of particles. It was possible to increase the adhesive strength between the backup material and the electromagnetic wave reflecting material by burying the adhesive and increasing the adhesive area. Further, an electromagnetic wave reflector having a predetermined three-dimensional shape can be manufactured very easily and at low cost.
第１図は金属性の電磁波反射材を含む複合シトにバック
アップ材の原料を接着する前の断面図、第２図は製造方
法の一例を示す断面図、第３図は成形品の断面図である
。
１・・・電磁波反射材、
２・・・粒体、
３−・・結合剤、
７・・・バックアップ材。Figure 1 is a cross-sectional view of the material before the back-up material is bonded to a composite sheet containing a metallic electromagnetic wave reflecting material, Figure 2 is a cross-sectional view showing an example of the manufacturing method, and Figure 3 is a cross-sectional view of the molded product. be. DESCRIPTION OF SYMBOLS 1... Electromagnetic wave reflective material, 2... Particles, 3-... Binder, 7... Backup material.
Claims (2)
材とを多数の粒体を含む結合剤で結合したことを特徴と
する電磁波反射体。1. An electromagnetic wave reflector characterized by combining a metal electromagnetic wave reflector and a synthetic resin backup material with a binder containing a large number of particles.
る請求項１記載の電磁波反射体。2. The electromagnetic wave reflector according to claim 1, characterized in that the electromagnetic wave reflector contains 50% or more of particles per unit area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30815488A JPH02154499A (en) | 1988-12-06 | 1988-12-06 | Electromagnetic wave reflector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30815488A JPH02154499A (en) | 1988-12-06 | 1988-12-06 | Electromagnetic wave reflector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02154499A true JPH02154499A (en) | 1990-06-13 |
Family
ID=17977549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30815488A Pending JPH02154499A (en) | 1988-12-06 | 1988-12-06 | Electromagnetic wave reflector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02154499A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5225966A (en) * | 1991-07-24 | 1993-07-06 | At&T Bell Laboratories | Conductive adhesive film techniques |
| EP2254198A1 (en) | 2009-05-18 | 2010-11-24 | Eads Casa Espacio S.L. | Process for improving the reflectivity of antenna reflecting surfaces. |
-
1988
- 1988-12-06 JP JP30815488A patent/JPH02154499A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5225966A (en) * | 1991-07-24 | 1993-07-06 | At&T Bell Laboratories | Conductive adhesive film techniques |
| EP2254198A1 (en) | 2009-05-18 | 2010-11-24 | Eads Casa Espacio S.L. | Process for improving the reflectivity of antenna reflecting surfaces. |
| JP2010268467A (en) * | 2009-05-18 | 2010-11-25 | Eads Casa Espacio Sl | Process for improving reflectivity of reflective surfaces of antennas |
| US8317960B2 (en) | 2009-05-18 | 2012-11-27 | Eads Casa Espacio S.L | Process for improving the reflectivity of reflective surfaces of antennas |
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