JPH0396104A - Radio wave lens - Google Patents
Radio wave lensInfo
- Publication number
- JPH0396104A JPH0396104A JP23315189A JP23315189A JPH0396104A JP H0396104 A JPH0396104 A JP H0396104A JP 23315189 A JP23315189 A JP 23315189A JP 23315189 A JP23315189 A JP 23315189A JP H0396104 A JPH0396104 A JP H0396104A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- dielectric constant
- hollow spheres
- resin
- radio wave
- 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
- 239000011347 resin Substances 0.000 claims abstract description 20
- 229920005989 resin Polymers 0.000 claims abstract description 20
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000011342 resin composition Substances 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 abstract description 4
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000805 composite resin Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Landscapes
- Aerials With Secondary Devices (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、空間に拡がった電磁波を一点に収束したり
、あるいは拡散するのに用いられる電波レンズに関する
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a radio wave lens used to converge or diffuse electromagnetic waves spread in space.
電磁波、特にミリ波、サブミリ波、光領域の波の伝送に
電波レンズが使用されている。従来の最も一般的な電波
レンズは、誘電損失の小さい誘電体材料であるボリプロ
ビレン、ポリエチレン、フッ素樹脂などを所望のレンズ
の形状に切削加工したものである。しかしながら、従来
の電波レンズは、充実質であるから重量が重くなるばか
りか、誘電体の誘電率を適宜に制御できないという欠点
をもっている。そこで、このような従来の電波レンズの
欠点を改善するものとして、本出願人は、連続気孔性の
多孔質高分子材料を用いた電波レンズを既に提案してい
る（特公昭５９−２３４８３号公報参照）。この電波レ
ンズは、多孔質化により誘電率が低下した素材でつくら
れているため、充実質のものからなるものに比べると、
レンズとしての特性が大幅に向上し、軽量になっている
。Radio lenses are used to transmit electromagnetic waves, especially waves in the millimeter, submillimeter, and optical regions. The most common conventional radio-wave lenses are made by cutting dielectric materials with low dielectric loss, such as polypropylene, polyethylene, and fluororesin, into a desired lens shape. However, conventional radio-wave lenses have the disadvantage that they are not only heavy due to their solid quality, but also that the dielectric constant of the dielectric cannot be appropriately controlled. Therefore, in order to improve the drawbacks of conventional radio lenses, the present applicant has already proposed a radio wave lens using a porous polymer material with continuous pores (Japanese Patent Publication No. 59-23483). reference). This radio lens is made of a material with a lower dielectric constant due to its porous nature, so compared to one made of solid material,
Its properties as a lens have been significantly improved and it is lighter.
ところが、上記電波レンズにおいては、連続気孔性の多
孔質材料が使用されることから、より高性能なものにす
るためその気孔率を高めると、圧縮等の外力に対する強
度が低下して気孔がつぶれやすくなり、部分的に密度の
異なる部分が生じてしまう。これは伝送損失の増加や放
射効率の低下等のレンズ特性劣化の原因となるので、高
性能化には限界があった。また、気孔がつぶれやすいの
で、レンズへの加工時あるいは出来上がったものの取り
扱いの面で大きな制約を受け、さらに素材の気孔率の調
整がかなり難しいので、設計どおりのレンズが得られに
くいなどの課題が残されていた。However, since the above-mentioned radio-wave lenses use a porous material with continuous pores, increasing the porosity in order to achieve higher performance reduces the strength against external forces such as compression, causing the pores to collapse. This results in areas with different densities. This causes deterioration of lens characteristics such as an increase in transmission loss and a decrease in radiation efficiency, so there is a limit to how high the performance can be improved. In addition, the pores are easily crushed, which poses major constraints when processing lenses and handling the finished product.Furthermore, it is quite difficult to adjust the porosity of the material, making it difficult to obtain lenses as designed. It was left behind.
この発明は、これら従来技術の課題に鑑みなされたもの
で、レンズ特性が良好で、しかも簡単に製造することの
できる電波レンズの提供をその目的とする。The present invention has been made in view of these problems of the prior art, and an object thereof is to provide a radio wave lens that has good lens properties and can be easily manufactured.
上記目的を達成するため、この発明では、繊維質四フッ
化エチレン樹脂中に低誘電率微小中空球体を分散せしめ
た樹脂組成物よりなる電波レンズを構威する。In order to achieve the above object, the present invention constructs a radio wave lens made of a resin composition in which low dielectric constant micro hollow spheres are dispersed in a fibrous tetrafluoroethylene resin.
本発明における繊維質四フッ化エチレン樹脂とは、剪断
力が加わる条件下で未焼成の四フッ化エチレン樹脂粒子
を成形加工したときに形成される微細な繊維状組織をも
った樹脂であり、その詳細な製造方法については、本出
願人の出願になる特公平１−２５７６９号公報に開示さ
れている。The fibrous tetrafluoroethylene resin in the present invention is a resin with a fine fibrous structure formed when unfired tetrafluoroethylene resin particles are molded under conditions where shearing force is applied. The detailed manufacturing method is disclosed in Japanese Patent Publication No. 1-25769 filed by the present applicant.
また、上記繊維質四フッ化エチレン樹脂内に混入される
低誘電率微小中空球体としては、ガラス、セラミック、
プラスチックなどの絶縁材料からなる粒径ｌ〜３００μ
ｍ程度の中空球体が挙げられる。中でも二酸化ケイ素の
含有量が８０％以上のガラス製の中空球体が好適に使用
される。その中空部には、窒素、二酸化炭素などの気体
が封入されているため、低誘電率、低誘電正接、低比重
となっている。これら微小中空球体の配合量については
特に限定されず、レンズの要求特性に応じて適宜還択さ
れるが、好ましくは１〜７０重量％の範囲で用いられる
。なお、これら微小中空球体の表面をカブプリング剤で
あらかじめ処理しておいてもよい。In addition, the low dielectric constant micro hollow spheres mixed into the above-mentioned fibrous tetrafluoroethylene resin include glass, ceramic,
Particle size l~300μ made of insulating material such as plastic
An example is a hollow sphere with a diameter of about m. Among them, glass hollow spheres having a silicon dioxide content of 80% or more are preferably used. The hollow part is filled with gas such as nitrogen or carbon dioxide, so it has a low dielectric constant, low dielectric loss tangent, and low specific gravity. The amount of these micro hollow spheres is not particularly limited and may be selected depending on the required characteristics of the lens, but is preferably used in the range of 1 to 70% by weight. Incidentally, the surfaces of these microscopic hollow spheres may be treated in advance with a cappling agent.
上記のごとき繊維質四フッ化エチレン樹脂と低誘電率微
小中空球体とからなる組成物は、独立気孔性の多孔質構
造となる。したがって、この樹脂組戊物によってつくら
れる本発明の電波レンズは、気孔率を高めた場合におい
ても圧縮等の外力に対してつぶれや変形などの発生がな
く、高性能で安定したレンズ特性を有するものとなる。The composition comprising the fibrous tetrafluoroethylene resin and the low dielectric constant micro hollow spheres has a porous structure with independent pores. Therefore, even when the porosity is increased, the radio-wave lens of the present invention made from this resin composite does not collapse or deform due to external forces such as compression, and has high performance and stable lens characteristics. Become something.
さらに、混入すべき微小中空球体の粒径および配合量の
選択により、樹脂組成物の気孔率を簡単かつ確実に調整
できるから、連続気孔性の多孔質材料を用いたものに比
べると、設計どおりのレンズを造りやすい。In addition, the porosity of the resin composition can be easily and reliably adjusted by selecting the particle size and blending amount of the micro hollow spheres to be mixed, so compared to those using continuous porous materials, it is possible to adjust the porosity of the resin composition as designed. Easy to make lenses.
以下、具体例をもって本発明についてさらに詳しく説明
するが、本発明はこれに限定されるものではない。Hereinafter, the present invention will be explained in more detail using specific examples, but the present invention is not limited thereto.
シラン系カブプリング剤で表面処理したガラス製微小中
空球体（エマーソンアンドカミング社製Ｓｔ，誘電率１
．２、２５μ一通過品）１０重量部と、四フッ化エチレ
ン樹脂微粉末（三井デュポンフロロケミカル社製テフロ
ン６Ｊ）９０重量部のディスバージョンとをコアギュレ
ート法により混合した後、これに液体潤滑剤としてソル
ベントナフサ（出光石油化学社製ＩＰ−１６２０）を加
え、室温下に１２時間放置した。Glass microscopic hollow spheres surface-treated with a silane-based cubupling agent (St manufactured by Emerson & Cumming, dielectric constant 1)
．． 2, 25μ one-pass product) and 90 parts by weight of dispersion of polytetrafluoroethylene resin fine powder (Mitsui DuPont Fluorochemical Co., Ltd. Teflon 6J) were mixed by the coagulate method, and then mixed as a liquid lubricant. Solvent naphtha (IP-1620 manufactured by Idemitsu Petrochemical Co., Ltd.) was added and left at room temperature for 12 hours.
次に、上記混和物を温めながら混練することにより四フ
ッ化エチレン樹脂を適度Ｉこ繊維質化させ、これを円筒
容器に充填した後、押圧して円柱状に成形した。この円
柱状成形体から肢体潤滑剤を加熱除去した後、３６０℃
で２０分間の焼成を行ない、そして図に示す断面形状の
レンズ（直径２４ｍｍ１厚さ８ ｍ＋ｍ）に切削加工し
、本発明による電波レンズを得た。Next, the above-mentioned mixture was kneaded while being warmed to make the tetrafluoroethylene resin moderately fibrous, which was then filled into a cylindrical container and pressed into a cylindrical shape. After removing the limb lubricant from this cylindrical molded body by heating,
This was fired for 20 minutes, and then cut into a lens having the cross-sectional shape shown in the figure (diameter 24 mm, thickness 8 m+m) to obtain a radio wave lens according to the present invention.
上記電波レンズ（実施例）と、微小中空球体を含まない
充実質の四フッ化エチレン樹脂からなる従来の電波レン
ズ（比較例）について、１３ＧＨｚにおける誘電率と伝
送損失を測定した。その結果を次表に示す。The dielectric constant and transmission loss at 13 GHz were measured for the above radio wave lens (Example) and a conventional radio wave lens (Comparative Example) made of solid tetrafluoroethylene resin that does not contain micro hollow spheres. The results are shown in the table below.
表より明らかなように、本発明による電波レンズは、充
実質の四フブ化エチレン樹脂からなるものに比べると、
伝送損失が大幅に少なくなっている。また、表には示さ
ないが、気孔のつぶれが発生しないことから、連続気孔
性の多孔質四フッ化エチレン樹脂からなるものに比べ、
レンズ特性の安定性の面で改善され、特にその製造およ
び取り扱いが容易になった。これ７らのことは、電波レ
ンズの直径を大きくするにしたがい、大きな差となって
現われた。As is clear from the table, the radio wave lens according to the present invention has a higher
Transmission loss is significantly reduced. Although not shown in the table, since pore collapse does not occur, compared to those made of open-pore porous tetrafluoroethylene resin,
The stability of the lens properties has been improved, and in particular, its manufacture and handling have become easier. These 7 things appeared to become larger differences as the diameter of the radio wave lens was increased.
以上説明したように、この発明による電波レンズは、繊
維質四フッ化エチレン樹脂中に低誘電率微小中空球体を
分散せしめた樹脂組成物からなるため、誘電率の制御が
容易で良好なレンズ特性が得られる。特に、誘電率を下
げるために気孔率を高めた場合に、従来の同種材料であ
る連続気孔性の多孔質四フッ化エチレン樹脂でつくられ
たものに比べ、外力によるつぶれや変形が著しく減少し
、その良好な特性が安定に保持される。さらに、製造や
取り扱いも容易になるなど、実用上の効果は極めて大で
ある。As explained above, the radio wave lens according to the present invention is made of a resin composition in which low dielectric constant micro hollow spheres are dispersed in a fibrous tetrafluoroethylene resin, so that the dielectric constant can be easily controlled and the lens characteristics are good. is obtained. In particular, when the porosity is increased to lower the dielectric constant, crushing and deformation due to external forces are significantly reduced compared to products made from the same type of conventional open-pore porous tetrafluoroethylene resin. , its good properties are stably maintained. Furthermore, the practical effects are extremely large, such as ease of manufacture and handling.
なお、この発明は上記実施例に限定されるものではなく
、低誘電率微小中空球体の材質やレンズの形状を変える
など、この発明の技術思想内での種々の変更はもちろん
可能である。Note that the present invention is not limited to the above-mentioned embodiments, and various changes can be made within the technical idea of the present invention, such as changing the material of the low dielectric constant micro hollow spheres and the shape of the lens.
図はこの発明の一実施例による電波レンズの断面を模式
的に示す説明図である。
ｌ：繊維質四フッ化エチレン樹脂、
２：低誘電率微小中空球体。The figure is an explanatory diagram schematically showing a cross section of a radio wave lens according to an embodiment of the present invention. 1: Fibrous tetrafluoroethylene resin, 2: Low dielectric constant micro hollow spheres.
Claims (1)
空球体を分散せしめた樹脂組成物よりなる電波レンズ。(1) A radio wave lens made of a resin composition in which low dielectric constant micro hollow spheres are dispersed in a fibrous tetrafluoroethylene resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23315189A JPH0396104A (en) | 1989-09-08 | 1989-09-08 | Radio wave lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23315189A JPH0396104A (en) | 1989-09-08 | 1989-09-08 | Radio wave lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0396104A true JPH0396104A (en) | 1991-04-22 |
Family
ID=16950518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23315189A Pending JPH0396104A (en) | 1989-09-08 | 1989-09-08 | Radio wave lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0396104A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7301504B2 (en) | 2004-07-14 | 2007-11-27 | Ems Technologies, Inc. | Mechanical scanning feed assembly for a spherical lens antenna |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5923483A (en) * | 1982-07-29 | 1984-02-06 | 日本電気株式会社 | Electric contact pin |
| JPS6425769A (en) * | 1987-04-24 | 1989-01-27 | Reckitt & Colmann Prod Ltd | Thiadiazole guanidines |
-
1989
- 1989-09-08 JP JP23315189A patent/JPH0396104A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5923483A (en) * | 1982-07-29 | 1984-02-06 | 日本電気株式会社 | Electric contact pin |
| JPS6425769A (en) * | 1987-04-24 | 1989-01-27 | Reckitt & Colmann Prod Ltd | Thiadiazole guanidines |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7301504B2 (en) | 2004-07-14 | 2007-11-27 | Ems Technologies, Inc. | Mechanical scanning feed assembly for a spherical lens antenna |
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