JPH09167528A - Coaxial cable - Google Patents

Coaxial cable

Info

Publication number
JPH09167528A
JPH09167528A JP22345796A JP22345796A JPH09167528A JP H09167528 A JPH09167528 A JP H09167528A JP 22345796 A JP22345796 A JP 22345796A JP 22345796 A JP22345796 A JP 22345796A JP H09167528 A JPH09167528 A JP H09167528A
Authority
JP
Japan
Prior art keywords
cable
conductor
coaxial cable
axial direction
heat transfer
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.)
Granted
Application number
JP22345796A
Other languages
Japanese (ja)
Other versions
JP2761378B2 (en
Inventor
Hiroshi Kubota
浩 久保田
Toshio Takahashi
利男 高橋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IDOUTAI TSUSHIN SENTAN GIJUTSU
IDOUTAI TSUSHIN SENTAN GIJUTSU KENKYUSHO KK
Original Assignee
IDOUTAI TSUSHIN SENTAN GIJUTSU
IDOUTAI TSUSHIN SENTAN GIJUTSU KENKYUSHO KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by IDOUTAI TSUSHIN SENTAN GIJUTSU, IDOUTAI TSUSHIN SENTAN GIJUTSU KENKYUSHO KK filed Critical IDOUTAI TSUSHIN SENTAN GIJUTSU
Priority to JP22345796A priority Critical patent/JP2761378B2/en
Publication of JPH09167528A publication Critical patent/JPH09167528A/en
Application granted granted Critical
Publication of JP2761378B2 publication Critical patent/JP2761378B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide a sufficient heat transfer suppressing effect without deterioration of electrical characteristics by arranging zigzag a conductor part which becomes a heat transfer path in the axial direction of a cable. SOLUTION: A coaxial cable is formed by forming many rectangular holes 10a in the outer conductor 10, and arranging zigzag a conductor part 10b locating between holes 10a adjacent each other in the axial direction of the cable along the axial direction of the cable. In other wards, many holes 10a are perforated in the outer conductor 10, and arranged so that the remaining parts (conductor parts 10b) are not in a row along the axial direction of the cable. A heat transfer path locates on the line passing the conductor part 10b along the axial direction of the cable so as to become zigzag. Since the length of the heat transfer path A becomes longer than the actual length L of the conductor 10, a heat transfer suppressing effect equal to or longer than an axial cable having the length of the heat transfer path A can be obtained.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、同軸ケーブルに関
し、特に、一定の温度環境下に置かれたデバイスへの信
号伝達に用いて好適な同軸ケーブルに関する。同軸ケー
ブルは、円筒状の外部導体とその中央にある中心導体と
からなる同軸心を束ねたケーブルで、平衡形ケーブルに
比べて、その構造上、高周波における伝送損失が少な
い、漏話特性が良い、インピーダンス均等性の確保が容
易であるといった優れた特性を有している。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coaxial cable, and more particularly to a coaxial cable suitable for transmitting a signal to a device placed under a constant temperature environment. A coaxial cable is a cable that bundles a coaxial core consisting of a cylindrical outer conductor and a central conductor at the center of the outer conductor. It has excellent characteristics such as easy impedance uniformity.

【0002】[0002]

【従来の技術】図4は同軸ケーブルの一使用例を示す図
である。この使用例では、円筒状の外部導体1とその中
央にある中心導体2、及び、両導体1、2間を絶縁する
誘電体3からなる同軸心を束ねた構造を有する同軸ケー
ブル4の一端を、恒温槽5の内部に設けられた図示を略
したデバイスに接続している。
2. Description of the Related Art FIG. 4 is a diagram showing an example of use of a coaxial cable. In this use example, one end of a coaxial cable 4 having a structure in which a coaxial core composed of a cylindrical outer conductor 1 and a center conductor 2 at the center thereof, and a dielectric 3 insulating between the two conductors 1 and 2 is bundled. , Connected to a device (not shown) provided inside the thermostat 5.

【0003】恒温槽5は、周知のとおりその内部の環境
温度を一定に維持するもので、当然ながら四方を取り囲
む槽壁に充分な断熱対策を施してあるが、この使用例で
は、同軸ケーブル4を通して伝えられる熱の影響によっ
て、内部温度が変動しやすい構造になっている。そこ
で、同軸ケーブル4からの熱の伝達を抑えるために、
同軸ケーブル4の径を小さくする、同軸ケーブル4の
全長を長くするといった対策をとっていた。によれ
ば、外部導体1の断面積を減少でき、また、によれ
ば、熱伝達経路長を長くできるから、いずれも熱伝達の
抑制効果を得ることができる。
[0003] As is well known, the thermostatic bath 5 is for keeping the internal environmental temperature constant. Naturally, a sufficient heat insulation is applied to the bath wall surrounding the four sides. The structure is such that the internal temperature tends to fluctuate due to the effect of heat transmitted through it. Therefore, in order to suppress the transmission of heat from the coaxial cable 4,
Measures were taken such as reducing the diameter of the coaxial cable 4 and increasing the total length of the coaxial cable 4. According to the embodiment, the cross-sectional area of the outer conductor 1 can be reduced, and according to the embodiment, the length of the heat transfer path can be increased.

【0004】なお、一定の温度環境は、恒温槽の内部だ
けに限らない。例えば、超低温冷却された真空断熱容器
内の環境(超伝導体の動作環境)も相当する。
[0004] The constant temperature environment is not limited to the inside of the thermostat. For example, the environment in a vacuum insulated container that has been cooled at a very low temperature (operating environment of a superconductor) also corresponds to the environment.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、かかる
対策(、)にあっては、熱伝達の抑制効果の点で有
効なものの、径を小さくするほど、また、全長を長くす
るほど、信号減衰量が増大するから、必然的に電気的特
性の劣化を伴うという解決すべき課題があった。そこ
で、本発明は、このような技術的課題に鑑みてなされた
もので、電気的特性を劣化せずに、充分な熱伝達の抑制
効果を得ることを目的とする。
However, although such measures (,) are effective in terms of the effect of suppressing heat transfer, the smaller the diameter and the longer the total length, the greater the signal attenuation. Therefore, there is a problem to be solved that the electrical characteristics are necessarily deteriorated because of the increase in Therefore, the present invention has been made in view of such technical problems, and has as its object to obtain a sufficient heat transfer suppressing effect without deteriorating electrical characteristics.

【0006】[0006]

【課題を解決するための手段】上記目的は、円筒状の外
部導体に多数の穴を形成し、かつ、ケーブルの軸方向に
沿って隣り合う穴と穴の間の導体部分を、ケーブルの軸
方向に沿ってジグザクに配置するという技術事項によっ
て達成できる。すなわち、熱の伝達経路は穴と穴の間の
導体部分であるから、この導体部分をケーブルの軸方向
に沿ってジグザクに配置することにより、同伝達経路の
長さをケーブルの実質長よりも長くすることができ、し
かも、穴の存在によって熱の伝達に関わる外部導体の断
面積も少なくすることができる。したがって、径を小さ
くすることなく、また、ケーブル長を長くすることな
く、言い換えれば、電気的特性を劣化せずに、充分な熱
伝達の抑制効果を得ることができる。
An object of the present invention is to form a large number of holes in a cylindrical outer conductor, and to form a conductor portion between adjacent holes along the axial direction of the cable by connecting the conductor portion of the cable with the shaft. This can be achieved by the technical matter of zigzag arrangement along the direction. That is, since the heat transmission path is a conductor portion between the holes, by arranging this conductor portion in a zigzag manner along the axial direction of the cable, the length of the transmission path is longer than the substantial length of the cable. The length can be increased, and the cross-sectional area of the outer conductor involved in heat transfer due to the presence of the hole can be reduced. Therefore, a sufficient effect of suppressing heat transfer can be obtained without reducing the diameter and without increasing the cable length, in other words, without deteriorating the electrical characteristics.

【0007】また、本発明に係る同軸ケーブルにおい
て、信号損失等の電気的特性を考慮しつつ、ケーブル設
計上の制約をなくした構成は、前記多数の穴が、同一形
状を有し、前記ケーブルの軸方向に等間隔で所定の数配
置されるという技術事項によって達成できる。すなわ
ち、前記多数の穴を一つの「穴群」として扱うと、ケー
ブルの電気的特性は穴群の諸元(穴の形状、寸法に係る
形状条件、及び配置間隔、配置数に係る配置条件)によ
り決まるが、その穴群を配置する”位置”の影響をまっ
たく受けない。したがって、電気的特性を考慮すること
なく穴群の位置を自由にレイアウトできるため、ケーブ
ル設計上の制約をなくすことができる。
Further, in the coaxial cable according to the present invention, the configuration in which the restrictions on the cable design are eliminated while taking into account the electrical characteristics such as the signal loss is provided. The technical matter that a predetermined number is arranged at equal intervals in the axial direction of the object can be achieved. That is, when the large number of holes are treated as one “hole group”, the electrical characteristics of the cable are the specifications of the hole group (shape conditions relating to the shape and dimensions of the holes, and arrangement conditions relating to the arrangement interval and the number of arrangements). It is not affected by the "position" where the hole group is arranged. Therefore, since the positions of the hole groups can be freely laid out without considering the electrical characteristics, restrictions on cable design can be eliminated.

【0008】[0008]

【発明の実施の形態】以下、本発明の実施例を図面に基
づいて説明する。図1は本発明に係る同軸ケーブルの一
実施例を示す図である。図1において、10は円筒状の
外部導体、11はその中央にある中心導体、12は両導
体10、11間を絶縁する誘電体である。なお、特に限
定しないが、外部導体10及び中心導体11の素材は、
電気的導電性を有する例えば銅であり、また、誘電体1
2の素材は、非導電性かつ所定誘電率を有する例えばテ
フロンである。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing one embodiment of a coaxial cable according to the present invention. In FIG. 1, reference numeral 10 denotes a cylindrical outer conductor, 11 denotes a central conductor at the center thereof, and 12 denotes a dielectric that insulates between the two conductors 10 and 11. Although not particularly limited, the materials of the outer conductor 10 and the center conductor 11 are as follows:
For example, copper having electrical conductivity, and
The second material is, for example, Teflon which is non-conductive and has a predetermined dielectric constant.

【0009】本実施例の同軸ケーブルの構造上の特徴
は、その外部導体10に多数の矩形状の穴10aを形成
している点、ケーブルの軸方向に沿って隣り合う穴10
aと穴10aの間の導体部分10bをケーブルの軸方向
に沿ってジグザクに配置している点にある。言い換えれ
ば、外部導体10を多数の穴10aで打ち抜くと共に、
ケーブルの軸方向に隣接する穴10aの位置を適切にレ
イアウトすることにより、その打ち抜き残余の部分(導
体部分10b)がケーブルの軸方向に沿って一直線に並
ばないようにした点にポイントがある。
The structure of the coaxial cable of this embodiment is characterized in that a large number of rectangular holes 10a are formed in the outer conductor 10 and the holes 10a adjacent to each other along the axial direction of the cable.
The point is that the conductor portion 10b between the hole a and the hole 10a is zigzagly arranged along the axial direction of the cable. In other words, the outer conductor 10 is punched out with a number of holes 10a,
There is a point in that by appropriately laying out the positions of the holes 10a adjacent to each other in the axial direction of the cable, the remaining portion (the conductor portion 10b) of the punching is not aligned in the axial direction of the cable.

【0010】このような構造にすると、熱の伝達経路
は、ケーブルの軸方向に沿った導体部分10bを通る線
上となり、図中の破線Aで示すように、ジグザクを描く
ことになる。したがって、同経路Aの長さは、明らかに
外部導体10の実質長Lよりも長くなるから、同経路A
の長さを有する同軸ケーブルと同程度若しくはそれ以上
に相当する熱伝達の抑制効果を得ることができる。しか
も、穴10aを形成したことによって、熱の伝達に関わ
る外部導体10の断面積も小さくなるため、この断面積
減少に伴う熱伝達の抑制効果も相乗的に得ることができ
る。
With such a structure, the heat transmission path is on a line passing through the conductor portion 10b along the axial direction of the cable, and draws a zigzag as shown by a broken line A in the figure. Therefore, the length of the same path A is obviously longer than the substantial length L of the outer conductor 10.
The heat transfer suppressing effect equivalent to or more than that of the coaxial cable having the length can be obtained. In addition, since the cross-sectional area of the outer conductor 10 involved in heat transfer is reduced by forming the hole 10a, the effect of suppressing heat transfer due to the reduced cross-sectional area can be obtained synergistically.

【0011】図2は本実施例の同軸ケーブルの断面図で
ある。2箇所の穴10aの間のハッチング部分は、外部
導体10の残余部分(すなわち導体部分10b)であ
る。図(a)と図(b)は、ケーブルの軸方向に沿って
隣り合う穴の位置でカットした断面図を表している。こ
の例では、各カット位置における導体部分10bは2個
であり、図(a)にあっては、x゜(xは0〜360゜
の間の任意の角度)とx+180゜に導体部分10bが
位置し、図(b)にあっては、x+90゜とx+270
゜に導体部分10bが位置している。すなわち、ケーブ
ルの軸方向に沿って隣り合う導体部分10bを、90゜
ずらしているが、これに限らない。90゜以外であって
もよいし、又は、導体部分10bを1個若しくは3個以
上にしてもよい。要は、導体部分10bがケーブルの軸
方向に沿って一直線に並ばないようにすればよい。
FIG. 2 is a sectional view of the coaxial cable of the present embodiment. The hatched portion between the two holes 10a is the remaining portion of the outer conductor 10 (that is, the conductor portion 10b). (A) and (b) are cross-sectional views cut at adjacent holes along the axial direction of the cable. In this example, there are two conductor portions 10b at each cut position, and in FIG. 9A, the conductor portions 10b are located at x ゜ (x is an arbitrary angle between 0 and 360 °) and at x + 180 °. X + 90 ° and x + 270 in FIG.
The conductor portion 10b is located at ゜. That is, the conductor portions 10b adjacent to each other along the axial direction of the cable are shifted by 90 °, but the present invention is not limited to this. It may be other than 90 °, or the number of the conductor portions 10b may be one or three or more. The point is that the conductor portions 10b need not be aligned in the axial direction of the cable.

【0012】また、上記実施例では、矩形状の穴10a
を形成すると共に、その穴10aの長辺をケーブルの軸
方向に対して直角にレイアウトしているが、これに限定
されない。図3(a)に示すように、穴10a′をケー
ブルの軸方向Fに沿って斜めにレイアウトしてもよい
し、図3(b)に示すように、穴10a″の形状を円形
又は楕円形にしてもよい。
In the above embodiment, the rectangular hole 10a
And the long side of the hole 10a is laid out at right angles to the axial direction of the cable. However, the present invention is not limited to this. As shown in FIG. 3A, the holes 10a 'may be laid out obliquely along the axial direction F of the cable, or as shown in FIG. 3B, the shape of the holes 10a "may be circular or elliptical. It may be shaped.

【0013】次に、本発明に係る同軸ケーブルの電気的
特性について詳しく検討する。図4は、電気的特性の検
討対象として用いた同軸ケーブルの他の実施例を示す図
である。本実施例の同軸ケーブルの構造は、基本的には
上述した実施例と同等であるが、外部導体10に設けら
れた穴10aが、外部導体10の外周方向に3/4(円
周の270°分)の長さとケーブルの軸方向に幅wを有
するスリット状の形状を有し、このような穴10aが、
所定の数(本実施例では9個)、所定の等間隔tで配置
され、ケーブルの軸方向に沿って隣り合うスリット状の
穴10aの各々の導体部分10bが、ケーブルの中心導
体11に対して点対象となるように反転形成されている
ことを特徴としている。ここで、基本となる同軸ケーブ
ルは外部導体10及び中心導体11の素材は銅であり、
誘電体12の素材はテフロンであるものとし、同軸ケー
ブルの中心導体11と外部導体10の直径比と誘電体1
2の誘電率により決まる特性インピーダンスZ0を50
とする。また、同軸ケーブルの実質長Lは50mmとす
る。
Next, the electrical characteristics of the coaxial cable according to the present invention will be discussed in detail. FIG. 4 is a diagram showing another embodiment of a coaxial cable used as an object of studying electrical characteristics. The structure of the coaxial cable of the present embodiment is basically the same as that of the above-described embodiment, except that the hole 10a provided in the outer conductor °) and has a slit-like shape having a width w in the axial direction of the cable.
A predetermined number (nine in the present embodiment) of the conductor portions 10b of the slit-shaped holes 10a that are arranged at a predetermined equal interval t and that are adjacent to each other along the axial direction of the cable are aligned with the center conductor 11 of the cable. It is characterized in that it is formed to be inverted so as to be a point object. Here, in the basic coaxial cable, the material of the outer conductor 10 and the center conductor 11 is copper,
The material of the dielectric 12 is Teflon, and the diameter ratio of the center conductor 11 to the outer conductor 10 of the coaxial cable and the dielectric 1
The characteristic impedance Z 0 determined by the dielectric constant of 2 is 50
And The substantial length L of the coaxial cable is 50 mm.

【0014】このような構造によれば、上述した実施例
同様に、熱の伝達経路は、ケーブルの軸方向に沿った導
体部分10bを通る線上となり、スリット状の穴10a
部分での導体部分10bが180°ずつずらして形成さ
れているため、明らかに外部導体10の実質長Lよりも
長くなり、熱伝達の抑制効果に優れた同軸ケーブルを得
ることができる。しかも、スリット状の穴10aによっ
て、熱の伝達に関わる外部導体10の断面積も小さくな
るため、この断面積減少に伴う熱伝達の抑制効果も得る
ことができる。
According to such a structure, as in the above-described embodiment, the heat transmission path is on a line passing through the conductor portion 10b along the axial direction of the cable, and the slit-like hole 10a is formed.
Since the conductor portions 10b in the portions are formed shifted by 180 °, they are clearly longer than the substantial length L of the outer conductor 10, and a coaxial cable excellent in the effect of suppressing heat transfer can be obtained. In addition, since the cross-sectional area of the outer conductor 10 involved in heat transfer is reduced by the slit-shaped hole 10a, an effect of suppressing heat transfer due to the decrease in the cross-sectional area can be obtained.

【0015】図5は本実施例の同軸ケーブルの断面図で
ある。図(a)と図(b)は、ケーブルの軸方向に沿っ
て隣り合う穴の位置でカットした断面図を表しており、
図(a)にあっては、x+90゜とx+180゜との間
に導体部分10b(ハッチング部分)が位置し、図
(b)にあっては、x+270゜とx゜との間に導体部
分10bが位置している。
FIG. 5 is a sectional view of the coaxial cable of the present embodiment. Figures (a) and (b) are cross-sectional views cut at positions of adjacent holes along the axial direction of the cable,
In FIG. 7A, a conductor portion 10b (hatched portion) is located between x + 90 ° and x + 180 °, and in FIG. 7B, a conductor portion 10b is located between x + 270 ° and x ゜. Is located.

【0016】このような構成の同軸ケーブルにおいて、
本願発明者は、以下のような特性が得られることを見い
だした。 1.穴の形状条件(たとえばスリット形状の場合、長さ
及び幅)と、配置間隔及び配置数からなる穴群の配置条
件、加えて同軸ケーブルの特性インピーダンスの各々を
一定とすると、穴群を同軸ケーブルのどの位置に配置し
ても電気的特性が一定となる。 2.同軸ケーブルの電気的特性は、穴の形状条件、たと
えばスリット形状の場合、幅寸法(あるいは開口面積)
に密接に関連する。
In the coaxial cable having such a configuration,
The inventor of the present application has found that the following characteristics can be obtained. 1. Assuming that the hole shape conditions (for example, length and width in the case of a slit shape), the hole group arrangement conditions including the arrangement intervals and the number of arrangements, and the characteristic impedance of the coaxial cable are constant, the hole group is coaxial cable. The electrical characteristics are constant regardless of the position of the device. 2. The electrical characteristics of the coaxial cable are determined by the hole shape conditions, for example, the width (or opening area) in the case of a slit shape.
Closely related to.

【0017】このような同軸ケーブルの電気的特性の一
検討結果を図に示して説明する。図6は、図4及び図5
に示した同軸ケーブルにおいて、スリット状の穴10a
の幅(スリット幅)wを1mm、2mm、4mmとした
場合の信号損失を、穴10aを設けない本来の同軸ケー
ブルの信号損失と比較したグラフである。穴10aを設
けていない本来の同軸ケーブルにおいては信号損失はほ
とんど見られないが、穴10aを設けた同軸ケーブルに
おいては、穴10aのスリット幅w(あるいは開口面
積)が大きくなるほど信号損失が周波数に依存して大き
く変動することがわかった。
A study of the electrical characteristics of such a coaxial cable will be described with reference to the drawings. FIG. 6 corresponds to FIG. 4 and FIG.
In the coaxial cable shown in FIG.
5 is a graph comparing the signal loss when the width (slit width) w is 1 mm, 2 mm, and 4 mm with the signal loss of the original coaxial cable without the hole 10a. In an original coaxial cable having no hole 10a, almost no signal loss is observed. However, in a coaxial cable having the hole 10a, as the slit width w (or opening area) of the hole 10a increases, the signal loss decreases in frequency. It turned out that it fluctuated greatly depending on the dependence.

【0018】すなわち、本発明は、同軸ケーブルの外部
導体10に穴10aを設けることにより、電気的特性の
劣化を抑制しつつ、十分な熱伝達の抑制をはかることを
目的とするものであるが、穴10aの形状条件であるス
リット幅wを小さく設定すれば、本来の同軸ケーブルと
同様に信号損失を小さく抑制しつつ、かつ熱伝達の抑制
効果を向上させた同軸ケーブルが得られる一方、スリッ
ト幅wを大きく設定すれば、信号損失に周波数依存性を
持たせて、あたかもフィルタを挿入したごとく所定の周
波数の信号のみを通過させ、かつ熱伝達の抑制効果をも
向上させた同軸ケーブルを実現することができる。しか
も、穴の形状条件、配置条件及びケーブルの特性インピ
ーダンスが一定であれば、このような穴群をケーブルの
どこに配置しても同等の電気的特性が得られるため、ケ
ーブル設計上の制約をまったく受けることがない。
That is, the object of the present invention is to provide a hole 10a in the outer conductor 10 of a coaxial cable so as to suppress deterioration of electrical characteristics and sufficiently suppress heat transfer. By setting the slit width w, which is a shape condition of the hole 10a, to be small, a coaxial cable in which the signal loss is suppressed to be small and the heat transfer suppressing effect is improved as in the case of the original coaxial cable is obtained. If the width w is set to be large, a coaxial cable that has a signal loss with frequency dependence, allows only a signal of a predetermined frequency to pass as if a filter is inserted, and also improves the effect of suppressing heat transfer is realized. can do. Moreover, if the hole shape conditions, arrangement conditions, and the characteristic impedance of the cable are constant, the same electrical characteristics can be obtained regardless of where such a hole group is placed in the cable, so there are no restrictions on the cable design. I will not receive it.

【0019】なお、本実施例においては、外部導体10
の外周の3/4を開口し、穴10a部における導体部分
10bを一箇所としたスリット形状の穴10aを設けた
場合の電気的特性について示したが、本発明の同軸ケー
ブルの実施形態はこれに限定されるものではなく、穴の
形状条件、配置条件及びケーブルの特性インピーダンス
等の条件が一定であれば、他の形状の穴であっても所定
の電気的特性を得ることができ、また同様の信号損失の
周波数依存性を示すことはいうまでもない。
In this embodiment, the outer conductor 10
3/4 of the outer periphery of the hole 10a, and the electrical characteristics in the case where a slit-shaped hole 10a was formed in which the conductor portion 10b in the hole 10a was provided at one position, the embodiment of the coaxial cable of the present invention It is not limited to this, as long as the shape conditions of the holes, the arrangement conditions, and the conditions such as the characteristic impedance of the cable are constant, it is possible to obtain predetermined electrical characteristics even with holes of other shapes, It goes without saying that the same signal loss shows frequency dependence.

【0020】[0020]

【発明の効果】本発明によれば、熱伝達の経路となる導
体部分をケーブルの軸方向に沿ってジグザクに配置した
ので、熱伝達の経路長をケーブルの実質長よりも長くす
ることができ、しかも、穴の存在によって熱の伝達に関
わる外部導体の断面積も減少できるから、電気的特性を
劣化せずに、充分な熱伝達の抑制効果を得ることができ
る。
According to the present invention, since the conductor portions serving as heat transfer paths are arranged in a zigzag manner along the axial direction of the cable, the heat transfer path length can be made longer than the substantial length of the cable. In addition, the cross-sectional area of the outer conductor involved in heat transfer can be reduced by the presence of the holes, so that a sufficient effect of suppressing heat transfer can be obtained without deteriorating electrical characteristics.

【0021】また、このような同軸ケーブルの具体的構
成として、穴の形状条件や配置条件を適宜定めることに
より、所望の周波数依存性を得ることができ、しかも、
穴群のケーブル上での位置はケーブルの電気的特性に影
響を及ぼさないため、伝達する信号や接続される回路装
置に応じて、最適な電気的特性を有する同軸ケーブルを
設定することができる。
As a specific configuration of such a coaxial cable, a desired frequency dependency can be obtained by appropriately determining the shape and arrangement conditions of the hole.
Since the position of the hole group on the cable does not affect the electrical characteristics of the cable, a coaxial cable having optimal electrical characteristics can be set according to the signal to be transmitted and the connected circuit device.

【図面の簡単な説明】[Brief description of the drawings]

【図1】一実施例の同軸ケーブルの外観図である。FIG. 1 is an external view of a coaxial cable according to an embodiment.

【図2】一実施例の同軸ケーブルの断面図である。FIG. 2 is a cross-sectional view of the coaxial cable of one embodiment.

【図3】一実施例の同軸ケーブルの他の実施態様を示す
図である。
FIG. 3 is a diagram showing another embodiment of the coaxial cable of one embodiment.

【図4】他の実施例の同軸ケーブルの外観図である。FIG. 4 is an external view of a coaxial cable according to another embodiment.

【図5】他の実施例の同軸ケーブルの断面図である。FIG. 5 is a sectional view of a coaxial cable according to another embodiment.

【図6】他の実施例の同軸ケーブルの電気的特性を示す
図である。
FIG. 6 is a diagram illustrating electrical characteristics of a coaxial cable according to another embodiment.

【図7】従来の同軸ケーブルとその使用例を示す図であ
る。
FIG. 7 is a diagram showing a conventional coaxial cable and an example of its use.

【符号の説明】[Explanation of symbols]

10:外部導体 10a:穴 10b:導体 10: outer conductor 10a: hole 10b: conductor

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】円筒状の外部導体に多数の穴を形成し、か
つ、ケーブルの軸方向に沿って隣り合う穴と穴の間の導
体部分を、ケーブルの軸方向に沿ってジグザクに配置し
たことを特徴とする同軸ケーブル。
1. A large number of holes are formed in a cylindrical outer conductor, and holes adjacent to each other along the axial direction of the cable are arranged in a zigzag pattern along the axial direction of the cable. A coaxial cable characterized by that.
【請求項2】前記請求項1記載の同軸ケーブルにおい
て、前記多数の穴が、同一形状を有し、前記ケーブルの
軸方向に等間隔で所定の数配置されていることを特徴と
する同軸ケーブル。
2. A coaxial cable according to claim 1, wherein said plurality of holes have the same shape and are arranged at predetermined intervals at equal intervals in the axial direction of said cable. .
JP22345796A 1995-08-30 1996-08-26 coaxial cable Expired - Lifetime JP2761378B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22345796A JP2761378B2 (en) 1995-08-30 1996-08-26 coaxial cable

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP22176495 1995-08-30
JP7-221764 1995-08-30
JP22345796A JP2761378B2 (en) 1995-08-30 1996-08-26 coaxial cable

Publications (2)

Publication Number Publication Date
JPH09167528A true JPH09167528A (en) 1997-06-24
JP2761378B2 JP2761378B2 (en) 1998-06-04

Family

ID=26524483

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22345796A Expired - Lifetime JP2761378B2 (en) 1995-08-30 1996-08-26 coaxial cable

Country Status (1)

Country Link
JP (1) JP2761378B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1006604A2 (en) * 1998-12-04 2000-06-07 Robert Bosch Gmbh Microwave coaxial line for cooled microwave systems
US7157645B2 (en) * 2005-02-04 2007-01-02 Commscope Properties, Llc Coaxial cables having improved smoke performance
US7174197B2 (en) * 1999-02-26 2007-02-06 Fujitsu Limited Superconductive filter module, superconductive filter assembly and heat insulating type coaxial cable
EP1881553A1 (en) * 1999-02-26 2008-01-23 Fujitsu Limited Superconductive filter module, superconductive filter assembly, and heat insulating type coaxial cable
US7602059B2 (en) 2005-10-18 2009-10-13 Nec Systems Technologies, Ltd. Lead pin, circuit, semiconductor device, and method of forming lead pin
US7844916B2 (en) 2004-12-03 2010-11-30 Sony Computer Entertainment Inc. Multimedia reproducing apparatus and menu screen display method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1006604A2 (en) * 1998-12-04 2000-06-07 Robert Bosch Gmbh Microwave coaxial line for cooled microwave systems
EP1006604A3 (en) * 1998-12-04 2001-11-07 Robert Bosch Gmbh Microwave coaxial line for cooled microwave systems
US7174197B2 (en) * 1999-02-26 2007-02-06 Fujitsu Limited Superconductive filter module, superconductive filter assembly and heat insulating type coaxial cable
EP1881553A1 (en) * 1999-02-26 2008-01-23 Fujitsu Limited Superconductive filter module, superconductive filter assembly, and heat insulating type coaxial cable
EP1962366A1 (en) * 1999-02-26 2008-08-27 Fujitsu Limited Superconductive filter module, superconductive filter assembly, and heat insulating type coxial cable
US7844916B2 (en) 2004-12-03 2010-11-30 Sony Computer Entertainment Inc. Multimedia reproducing apparatus and menu screen display method
US7157645B2 (en) * 2005-02-04 2007-01-02 Commscope Properties, Llc Coaxial cables having improved smoke performance
US7602059B2 (en) 2005-10-18 2009-10-13 Nec Systems Technologies, Ltd. Lead pin, circuit, semiconductor device, and method of forming lead pin

Also Published As

Publication number Publication date
JP2761378B2 (en) 1998-06-04

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