JP4507655B2 - High performance semi-rigid coaxial cable and coaxial cable assembly - Google Patents
High performance semi-rigid coaxial cable and coaxial cable assembly Download PDFInfo
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本発明は、情報通信機器類、半導体の検査装置、或は高周波測定機器の内部／外部配線などに用いられるセミリジッド同軸ケーブル、およびセミリジッド同軸ケーブルと同軸型コネクタとを接続した構造の同軸ケーブルアセンブリに係り、特に軽量化や断熱性に配慮した高性能セミリジッド同軸ケーブルおよび高性能同軸ケーブルアセンブリに関するものである。 The present invention relates to a semi-rigid coaxial cable used for internal / external wiring of information communication equipment, semiconductor inspection equipment, or high-frequency measuring equipment, and a coaxial cable assembly having a structure in which a semi-rigid coaxial cable and a coaxial connector are connected. In particular, the present invention relates to a high-performance semi-rigid coaxial cable and a high-performance coaxial cable assembly that take into consideration weight reduction and thermal insulation.
光通信を含む情報通信機器類、産業機器類、或は測定機器類等のうち、特に高周波用途の機器類（以下、高周波機器類と略記する）の機内外配線材として用いられるケーブル類、例えばセミリジッド同軸ケーブルは、これら機器類の性能及び機能の向上に伴って種々の特性が要求されている。特に高周波伝送技術の進展と共にセミリジッド同軸ケーブルの適用周波数は数GHzから数十GHzの帯域に及び、更に広帯域化しつつある。また、上記セミリジッド同軸ケーブルと同軸型コネクタとを接続した構造の同軸コネクタアセンブリに於いても数十GHzの帯域に適合するものが求められている。更に高周波機器類は小型化や軽量化の動きが加速しており、使用環境も高温から極低温までと多岐に渡ってきている。
従来のセミリジッド同軸ケーブルは、中心導体の外周をＰＥ（ポリエチレン）樹脂の充実体若しくは発泡体またはＰＴＦＥ（ポリテトラフルオロエチレン）樹脂の充実体若しくは多孔質体等の絶縁体で被覆すると共に、その絶縁体の外側に銅製パイプを被せダイス引きにより絶縁体に密着させ外部導体を形成した構成になっており、例えば下記特許文献１に記載されている。また図３に比較例１のセミリジッド同軸ケーブル１０’aとして、中心導体１：銀めっき銅被覆鋼線（SPCP）、絶縁体２：PTFE樹脂、外部導体３：Cu(銅)の断面図を、図４に比較例２のセミリジッド同軸ケーブル１０’bとして、中心導体１：銀めっき銅被覆鋼線（SPCP）、絶縁体２：多孔質PTFE樹脂、外部導体３：Cuの断面図を示す。また、ケーブルに軽量化が求められる用途では、銅製パイプの替わりにアルミ製パイプが、断熱性や耐腐食性が求められる用途では、銅製パイプの替わりにステンレス製パイプが一般的に用いられている（図５に比較例３のセミリジッド同軸ケーブル１０’cとして、中心導体１：SPCP、絶縁体２：多孔質PTFE樹脂、外部導体３：AL（アルミニウム）の断面図を示す）。更に低減衰量が求められる用途では、アルミパイプやステンレスパイプの内側に銅や銀や金などの良導電性金属を特殊な方法でメッキしたものが用いられることもある。そして、これらセミリジッド同軸ケーブルを同軸型コネクタにアセンブリする際には、はんだやカシメによる接続手法がとられる。かかるセミリジッド同軸ケーブルアセンブリは、金属製パイプの優れた遮蔽効果と反射特性、減衰特性等から一般的にDC〜40GHz程度までの高周波帯域に使用可能である。
In the conventional semi-rigid coaxial cable, the outer periphery of the center conductor is covered with an insulator such as a solid or foamed body of PE (polyethylene) resin or a solid or porous body of PTFE (polytetrafluoroethylene) resin, and the insulation The outer conductor is covered with a copper pipe so that it is in close contact with the insulator by die drawing to form an external conductor, which is described in Patent Document 1, for example. FIG. 3 is a cross-sectional view of the central conductor 1: silver-plated copper-coated steel wire (SPCP), insulator 2: PTFE resin, and external conductor 3: Cu (copper) as the semi-rigid coaxial cable 10′a of Comparative Example 1. FIG. 4 shows a cross-sectional view of the central conductor 1: silver-plated copper-coated steel wire (SPCP), insulator 2: porous PTFE resin, and external conductor 3: Cu as the semi-rigid coaxial cable 10′b of Comparative Example 2. In applications where cable weight reduction is required, aluminum pipes are generally used instead of copper pipes, and in applications where heat insulation and corrosion resistance are required, stainless steel pipes are generally used instead of copper pipes. (FIG. 5 shows a sectional view of the central conductor 1: SPCP, the insulator 2: porous PTFE resin, and the outer conductor 3: AL (aluminum) as the semi-rigid coaxial cable 10′c of Comparative Example 3). In applications where a low attenuation is required, an aluminum pipe or stainless steel pipe may be plated with a good conductive metal such as copper, silver or gold by a special method. Then, when assembling these semi-rigid coaxial cables into a coaxial connector, a connection method using solder or caulking is taken. Such a semi-rigid coaxial cable assembly can generally be used in a high frequency band from DC to about 40 GHz due to the excellent shielding effect, reflection characteristic, attenuation characteristic, etc. of the metal pipe.
しかしながら、上記従来のセミリジッド同軸ケーブルおよびセミリジッド同軸ケーブルアセンブリにおいては以下のような欠点があった。従来のセミリジッド同軸ケーブルの電気特性について、本発明のセミリジッド同軸ケーブルと比較して図６、７を用いて説明する。なお図６はセミリジッド同軸ケーブルの外部導体材質、絶縁体材質の違いによる挿入損失特性を示すチャートであり、また図７はセミリジッド同軸ケーブルの絶縁体材質の違いによる温度変化に伴う位相変動を示すチャートである。
昨今の高周波機器類は装置の小型化や軽量化が進み、セミリジッド同軸ケーブルおよび同軸ケーブルアセンブリにおいても軽量化の要求が強い。そこで従来は、絶縁体に多孔質タイプを用い、セミリジッド同軸ケーブルの外部導体のみを銅製からアルミ製に替え対応していたが、銅の体積固有抵抗は1.72E-06（Ω.cm）であるのに対し、アルミのそれは2.89E-06（Ω.cm）であるため、図６の比較例３に示す通り、特に高周波帯域における挿入損失が悪化してしまうという問題があった。また、絶縁体に充実タイプを用いた場合は、図６の比較例１に示す通り、比較例２、３のような多孔質タイプを用いた場合と比較して高周波帯域における挿入損失が悪く、また温度変化に伴う体積変動が大きいため、電気特性、例えば図７の比較例１に示す通り温度変化に対する位相変動が大きくなってしまうという問題があった。また、同軸ケーブルに断熱性や耐腐食性が求められる場合には、外部導体にステンレス材を使用することがあるが、この場合も上記と同様の問題が生じるという問題があった。なお、挿入損失の改善を目的にアルミパイプやステンレスパイプの内側に銅や銀や金などの良導電性金属をめっきする手法も考えられるが、特殊な下地処理が必要になり、また有害な溶剤を用いるなど、作業工程やコスト面で問題があった。そして、外部導体にアルミやステンレスを選択する場合には、コネクタアセンブリ時に通常の半田加工が行えず、カシメ等の手法をとる必要があり、また高周波帯域における伝送特性の確保が難しいという問題があった。
本発明は、上記従来技術が有する各種問題点を解決するためになされたものであり、セミリジッド同軸ケーブルおよび同軸ケーブルアセンブリの軽量化や断熱性、耐腐食性を図りつつも、ケーブルの温度変化に伴う電気特性の変動（例えば位相変動）が小さく、また65GHzを越える帯域まで良好な伝送特性を有し、自然環境やコスト面にも配慮した高性能セミリジッド同軸ケーブルおよび高性能セミリジッド同軸ケーブルアセンブリを提供することを目的とする。
However, the conventional semi-rigid coaxial cable and the semi-rigid coaxial cable assembly have the following drawbacks. The electrical characteristics of the conventional semi-rigid coaxial cable will be described with reference to FIGS. 6 and 7 in comparison with the semi-rigid coaxial cable of the present invention. FIG. 6 is a chart showing insertion loss characteristics due to differences in the outer conductor material and insulator material of the semi-rigid coaxial cable, and FIG. 7 is a chart showing phase fluctuations due to temperature changes due to differences in the insulator material of the semi-rigid coaxial cable. It is.
Recent high-frequency devices have become smaller and lighter, and there is a strong demand for weight reduction in semi-rigid coaxial cables and coaxial cable assemblies. Therefore, conventionally, a porous type was used as the insulator, and only the outer conductor of the semi-rigid coaxial cable was changed from copper to aluminum. However, the volume resistivity of copper is 1.72E-06 (Ω.cm). On the other hand, since aluminum is 2.89E-06 (Ω.cm), as shown in Comparative Example 3 in FIG. In addition, when the solid type is used for the insulator, as shown in Comparative Example 1 of FIG. 6, the insertion loss in the high frequency band is poor as compared with the case of using the porous type as in Comparative Examples 2 and 3, Further, since the volume variation accompanying the temperature change is large, there is a problem that the electrical characteristics, for example, the phase variation with respect to the temperature change becomes large as shown in Comparative Example 1 in FIG. In addition, when the coaxial cable is required to have heat insulation and corrosion resistance, a stainless material may be used for the outer conductor. However, in this case, there is a problem that the same problem as described above occurs. For the purpose of improving insertion loss, a method of plating a good conductive metal such as copper, silver, or gold on the inside of an aluminum pipe or stainless steel pipe is also conceivable. There was a problem in terms of work process and cost. When aluminum or stainless steel is selected as the outer conductor, normal soldering cannot be performed at the time of connector assembly, and it is necessary to use a caulking method or the like, and it is difficult to secure transmission characteristics in a high frequency band. It was.
The present invention has been made in order to solve the various problems of the above-described prior art, and can reduce the temperature, heat insulation, and corrosion resistance of the semi-rigid coaxial cable and the coaxial cable assembly, while changing the temperature of the cable. Provide high-performance semi-rigid coaxial cable and high-performance semi-rigid coaxial cable assembly that have small transmission characteristics fluctuations (for example, phase fluctuation), good transmission characteristics up to a band exceeding 65 GHz, and that take into consideration the natural environment and cost. The purpose is to do.
第１の観点として本発明は、中心導体と、この中心導体の外側に被覆される絶縁体と、この絶縁体の外側に形成される外部導体とを備えたセミリジッド同軸ケーブルであって、前記絶縁体は、多孔質の未焼結ポリテトラフルオロエチレン樹脂（以下、多孔質未焼結PTFE樹脂と略記する）の押し出し被覆からなり、また外部導体は、先ず絶縁体の外周に良導電性の金属箔を螺旋巻きした第一の外部導体（金属箔外部導体）と、次いでその外側に金属製パイプを被せダイス引きにより該パイプを第一の外部導体に密着させた第二の外部導体（金属パイプ外部導体）の二層の外部導体からなることを特徴とする高性能セミリジッド同軸ケーブルにある。
上記第１観点のセミリジッド同軸ケーブルでは、絶縁体として多孔質未焼結PTFE樹脂の押し出し被覆を用いているので、電気特性が良好となり好ましい。また外部導体として良導電性の金属箔、例えば銀めっき圧延軟銅テープ（銀の体積固有抵抗は1.62E-06
Ω.cm）の螺旋巻きにより形成した第一の外部導体（金属箔外部導体）（内側の外部導体）と、金属製パイプを被せダイス引きし金属箔に密着させた第二の外部導体（金属パイプ外部導体）（外側の外部導体）とで構成したものである。ここで、外部導体二層間は確実に密着していることが重要であり、ダイス引きに用いるダイス径は最適なサイズを選定する必要がある。なお、電気特性を決めている外部導体は第一の外部導体の金属箔であり、第二の外部導体の金属パイプは電気特性に影響を与えないため、金属パイプの材質は用途に合わせ任意のものを選定することが出来る。そして、本発明のセミリジッド同軸ケーブルは同軸型コネクタ本体に機械的・電気的に確実に接続を行うことにより、電気特性が良い高性能セミリジッド同軸ケーブルアセンブリが得られる。
As a first aspect, the present invention provides a semi-rigid coaxial cable comprising a center conductor, an insulator coated on the outside of the center conductor, and an outer conductor formed on the outside of the insulator, wherein the insulation The body consists of an extruded coating of porous unsintered polytetrafluoroethylene resin (hereinafter abbreviated as porous unsintered PTFE resin), and the outer conductor first has a highly conductive metal on the outer periphery of the insulator. A first outer conductor (metal foil outer conductor) in which a foil is spirally wound, and then a second outer conductor (metal pipe) which is covered with a metal pipe on the outer side and is closely attached to the first outer conductor by die drawing. It is a high performance semi-rigid coaxial cable characterized by comprising two layers of outer conductors.
The semi-rigid coaxial cable according to the first aspect is preferable because it uses an extruded coating of porous unsintered PTFE resin as an insulator, and thus has good electrical characteristics. The outer conductor also has a highly conductive metal foil, such as silver-plated rolled anodized copper tape (silver volume resistivity is 1.62E-06
The first outer conductor (metal foil outer conductor) (inner outer conductor) formed by spiral winding of Ω.cm) and the second outer conductor (metal) covered with a metal pipe and closely attached to the metal foil Pipe outer conductor) (outer outer conductor). Here, it is important that the two outer conductor layers are in close contact with each other, and it is necessary to select an optimum die diameter for die drawing. The outer conductor that determines the electrical characteristics is the metal foil of the first outer conductor, and the metal pipe of the second outer conductor does not affect the electrical characteristics. You can choose one. The semi-rigid coaxial cable of the present invention is mechanically and electrically securely connected to the coaxial connector body, thereby obtaining a high-performance semi-rigid coaxial cable assembly with good electrical characteristics.
第２の観点として本発明は、前記絶縁体の外径をX(mm) とした場合、前記第一の外部導体の良導電性金属箔として幅W(mm)と厚さＴ(mm)が下記(1)、(2)式を満足するテープ状の金属箔を用い、また、該テープ状金属箔の螺旋巻き時の重なりが、該金属箔の幅の27〜48％で、一定の巻き張力で均一に巻き回されていることを特徴とする高性能セミリジッド同軸ケーブルにある。
幅W＝1.2×ｌｎ(X)＋1.6 （許容値±50%） −−(1)
厚さＴ＝0.013×ｌｎ(X)＋0.02（許容値±50%） −−(2)
但し、0.5＜X＜4.5
なお、上記(1)、(2)式は、前記第一の外部導体のテープ状金属箔として、どのような幅と厚さのものが好ましいかを絶縁体外径毎に試作して検討し、その結果をグラフにプロットすることにより導出したものである。
上記(1)、(2)式において（許容値±50%）とした理由は、±50%までは特性上問題がなく許容できるためである。なお、金属箔の厚さや幅が上記(1)、(2)式の範囲を超えて大き過ぎると一定の巻き張力での均一な巻き回しが不可能になり、また金属箔の厚さや幅が上記(1)、(2)式の範囲を超えて小さ過ぎると機械的強度が得られないので好ましくない。また絶縁体外径X(mm)を0.5＜X＜4.5と限定した理由は、この範囲の絶縁体外径が通常のセミリジッド同軸ケーブルの絶縁体外径として好ましいためである。また前記テープ状金属箔の螺旋巻き時の重なりを、該金属箔の幅の27〜48％と限定した理由は、金属箔の重なりが27%未満では、ケーブル屈曲時または振動や衝撃等外的要因に対して重なり部位の接触が不完全となる危険性があり、また金属箔の重なりが48％を超えると、螺旋巻き外部導体が金属箔幅の48％を超えた重なりで強固に形成されてしまうために、周期的な不連続ピッチによる影響が強く現れ、反射スパイクが顕著になる（反射特性が悪化する）ので好ましくないためである。
上記第２観点の同軸ケーブルでは、絶縁体外径をX(mm) とした場合、第一の外部導体の金属箔の幅W(mm)と厚さＴ(mm)が上記(1)、(2)式を満足するテープ状の金属箔を用い、また該金属箔の螺旋巻き時の重なりを該金属箔の幅の27〜48％の範囲に限定したことで、一定張力による均一な巻き回しが可能になったものである。これにより、金属箔の螺旋巻きによる外部導体の内面の凹凸、すなわち絶縁体表面の凹凸は48％を超える重ね巻き時に比べ分散し且つ滑らかになるため、周期的な不連続ピッチが緩和され特定周波数の反射スパイクが低減できる。なお上記第１観点の同軸ケーブルと同様の作用・効果を奏するのは勿論である。
As a second aspect of the present invention, when the outer diameter of the insulator is X (mm), the width W (mm) and the thickness T (mm) are good conductive metal foils of the first outer conductor. The tape-shaped metal foil satisfying the following formulas (1) and (2) is used, and when the tape-shaped metal foil is spirally wound, the overlap is 27 to 48% of the width of the metal foil. It is a high performance semi-rigid coaxial cable that is uniformly wound by tension.
Width W = 1.2 x l n (X) + 1.6 (allowable value ± 50%)--(1)
Thickness T = 0.01 3 × l n (X) +0.02 (allowable value ± 50%) −− (2)
However, 0.5 <X <4.5
In addition, the above formulas (1) and (2) are considered as a tape-shaped metal foil of the first outer conductor, and the width and thickness of what is preferable are experimentally examined for each outer diameter of the insulator, The result is derived by plotting on a graph.
The reason for setting (allowable value ± 50%) in the above equations (1) and (2) is that up to ± 50% is acceptable without any problem in characteristics. If the thickness or width of the metal foil is too large beyond the ranges of the above formulas (1) and (2), uniform winding with a constant winding tension becomes impossible, and the thickness and width of the metal foil are not sufficient. If it is too small beyond the range of the above formulas (1) and (2), the mechanical strength cannot be obtained, which is not preferable. The reason why the insulator outer diameter X (mm) is limited to 0.5 <X <4.5 is that the insulator outer diameter in this range is preferable as the insulator outer diameter of a normal semi-rigid coaxial cable. The reason for limiting the overlap of the tape-shaped metal foil when spirally wound to 27 to 48% of the width of the metal foil is that when the overlap of the metal foil is less than 27% There is a risk of incomplete contact with the overlapping part due to the factors, and if the overlap of the metal foil exceeds 48%, the spirally wound outer conductor is firmly formed with the overlap exceeding 48% of the metal foil width. Therefore, the influence of the periodic discontinuous pitch appears strongly, and the reflection spike becomes remarkable (reflection characteristics deteriorate), which is not preferable.
In the coaxial cable of the second aspect, when the outer diameter of the insulator is X (mm), the width W (mm) and the thickness T (mm) of the metal foil of the first outer conductor are the above (1), (2 ) And a tape-shaped metal foil satisfying the formula, and the overlap at the time of spiral winding of the metal foil is limited to a range of 27 to 48% of the width of the metal foil. It has become possible. As a result, the irregularities on the inner surface of the outer conductor due to the spiral winding of the metal foil, that is, the irregularities on the surface of the insulator, are dispersed and smooth compared to over-wrapping exceeding 48%, so that the periodic discontinuous pitch is relaxed and the specific frequency is reduced. The reflection spike can be reduced. Of course, the same effects and advantages as the coaxial cable of the first aspect are achieved.
第３の観点として本発明は、前記第二の外部導体の金属製パイプの材質がアルミニウムからなることを特徴とする高性能セミリジッド同軸ケーブルにある。
上記第３観点の同軸ケーブルでは、第二の外部導体の金属製パイプの材質がアルミニウムなので同軸ケーブルの軽量化が計れるので好ましい。なお、中心導体もアルミ材として構わないが、ケーブル全体に占めるウエイトが低いためアルミ以外の金属、合金、めっき線を選択しても十分軽量化が図れる。なお上記第１、２観点の同軸ケーブルと同様の作用・効果を奏するのは勿論である。
According to a third aspect of the present invention, there is provided a high performance semi-rigid coaxial cable characterized in that the metal pipe of the second outer conductor is made of aluminum.
The coaxial cable of the third aspect is preferable because the material of the metal pipe of the second outer conductor is aluminum, so that the weight of the coaxial cable can be reduced. The central conductor may be made of an aluminum material. However, since the weight of the entire cable is low, the weight can be sufficiently reduced even if a metal, alloy, or plated wire other than aluminum is selected. Needless to say, the same effects and advantages as the coaxial cables of the first and second aspects are achieved.
第４の観点として本発明は、前記第二の外部導体の金属製パイプの材質がステンレス、またはベリリウム銅やリン青銅、黄銅からなる高性能セミリジッド同軸ケーブルにある。
上記第４観点の同軸ケーブルでは、外部導体の金属製パイプの材質がステンレスからなるので断熱性や耐腐食性が良くなり好ましい。またベリリウム銅やリン青銅を用いても断熱効果が得られる。さらにリン青銅や黄銅を用いた場合には非磁性対応になる。なお上記第１、２観点の同軸ケーブルと同様の作用・効果を奏するのは勿論である。
As a fourth aspect, the present invention resides in a high performance semi-rigid coaxial cable in which the metal pipe of the second outer conductor is made of stainless steel, beryllium copper, phosphor bronze, or brass.
The coaxial cable according to the fourth aspect is preferable because the metal pipe of the outer conductor is made of stainless steel, so that heat insulation and corrosion resistance are improved. Further, the heat insulating effect can be obtained even if beryllium copper or phosphor bronze is used. Further, when phosphor bronze or brass is used, it becomes non-magnetic. Needless to say, the same effects and advantages as the coaxial cables of the first and second aspects are achieved.
第５の観点として本発明は、前記二層の外部導体の外周に絶縁シースを被覆したことを特徴とする高性能セミリジッド同軸ケーブルにある。
上記第５観点の同軸ケーブルでは、前記二層の外部導体の外周に絶縁シースを被覆したので同軸ケーブルが絶縁された構造となり好ましい。なお上記第１、２、３または４観点の同軸ケーブルと同様の作用・効果を奏するのは勿論である。
According to a fifth aspect of the present invention, there is provided a high performance semi-rigid coaxial cable characterized in that an outer sheath of the two-layer outer conductor is covered with an insulating sheath.
The coaxial cable according to the fifth aspect is preferable because the coaxial cable is insulated because the outer sheath of the two-layered outer conductor is covered with an insulating sheath. Needless to say, the same effects and advantages as those of the first, second, third, or fourth aspect of the coaxial cable are achieved.
第６の観点として本発明は、上記第１、２、３または４および５観点の高性能セミリジッド同軸ケーブルと同軸型コネクタとを接続した構造のセミリジッド同軸ケーブルアセンブリであって、前記セミリジッド同軸ケーブルのコネクタ接続先端部は、中心導体、第二の外部導体（第一の外部導体および絶縁体とは面一（それぞれの端面が同一面））が所定長、順次露出するよう段差加工され、また第二外部導体の外周表面は螺旋状凹凸加工が施されて段差・螺旋状凹凸加工接続先端部とされ、また第一外部導体と第二外部導体からなる外部導体の先端面付近を除いた螺旋状凹凸加工外周表面に接着剤が塗布され、先端部が内側に向かって延設されたフランジを有し且つ内面に螺旋状凹凸加工が施された金属製シェルの該フランジ内壁に、前記段差・螺旋状凹凸加工接続先端部の外部導体先端面が突き当たり圧着されるまで回転挿入され、フランジ内壁と該先端面の突き当たり圧着部を電気的接続部とし、前記塗布された接着剤が硬化され、段差・螺旋状凹凸加工接続先端部および金属製シェルが機械的に固着され、電気的に接続されたシェル装着ケーブル体とし、これを同軸型コネクタ本体に装着した事を特徴とする高性能セミリジッド同軸ケーブルアセンブリにある。
上記第二外部導体の外周表面の螺旋状凹凸加工は、例えばGroove DiceによるSpiral Groove加工、すなわち、専用ねじ切りダイスを用いた粗雄ねじ加工を用いることができる。また接着剤は第二外部導体の先端面（フランジの内壁に突き当てる面）には塗布しないものとする。なお、同軸ケーブルのコネクタ接続先端部の段差加工は、中心導体、絶縁体、第二外部導体が順次露出するようにしても良い。
上記第６観点の同軸ケーブルアセンブリでは、セミリジッド同軸ケーブルと同軸型コネクタとを接続する際、従来からの半田接続方式ではなく、同軸ケーブルの段差・螺旋状凹凸加工接続先端部と内面螺旋状凹凸加工金属製シェルの螺旋状凹凸接合と接着剤を併用し、シェル先端部のフランジ内壁にケーブルの二層の外部導体先端面を突き当て、二層の外部導体およびシェルを機械的に固着させ電気的に接続した方式であるので、従来のような半田接続に起因する問題点が生じることはなく、65GHzを越える高周波帯域まで良好な伝送特性が得られる。
As a sixth aspect, the present invention provides a semi-rigid coaxial cable assembly having a structure in which the high-performance semi-rigid coaxial cable according to the first, second, third, fourth, and fifth aspects and a coaxial connector are connected. The connector connecting tip is stepped so that the center conductor and the second outer conductor (the first outer conductor and the insulator are flush with each other (the end faces are the same)) are successively exposed for a predetermined length. second outer periphery surface of the conductor is a helical roughened is subjected to stepped-helical roughened connection tip, the first outer conductor and the helical exclusive of external conductor near the tip face of consisting of the second outer conductor was or Jo uneven adhesive machined outer circumferential table surface is coated, the said flange inner wall of the metal shell and spiral roughened on the inner surface has been subjected has a flange tip is extended inward, the Rotation is inserted until the outer conductor tip surface of the connection / tip portion of the difference / spiral concavo-convex connection contacts and is crimped, the flange inner wall and the contact portion of the tip surface are the electrical connection portion, and the applied adhesive is cured. High-performance semi-rigid, characterized in that the connection tip of the step / spiral unevenness and the metal shell are mechanically fixed and electrically connected to the shell-attached cable body, which is attached to the coaxial connector body Located in coaxial cable assembly.
For example, spiral groove processing by Groove Dice, that is, rough male screw processing using a dedicated threading die, can be used for the spiral concavo-convex processing on the outer peripheral surface of the second outer conductor. In addition, the adhesive is not applied to the tip surface of the second outer conductor (the surface that abuts against the inner wall of the flange). Note that the step processing at the connector connecting tip of the coaxial cable may sequentially expose the central conductor, the insulator, and the second outer conductor.
In the coaxial cable assembly according to the sixth aspect, when connecting the semi-rigid coaxial cable and the coaxial connector, the step of the coaxial cable, the spiral irregularity processing connection tip and the inner spiral irregularity processing are used instead of the conventional solder connection method. Using a metal shell spiral concavo-convex joint and adhesive, the two-layer outer conductor tip of the cable is abutted against the inner wall of the flange at the shell tip, and the two-layer outer conductor and shell are mechanically secured Therefore, there is no problem caused by solder connection as in the prior art, and good transmission characteristics can be obtained up to a high frequency band exceeding 65 GHz.
第７の観点として本発明は、上記第１、２、３または４および５観点の高性能セミリジッド同軸ケーブルと同軸型コネクタとを接続した構造のセミリジッド同軸ケーブルアセンブリであって、前記セミリジッド同軸ケーブルのコネクタ接続先端部は、中心導体、第二の外部導体（第一の外部導体および絶縁体とは面一（それぞれの端面が同一面））が所定長、順次露出するよう段差加工され、また第二外部導体の外周表面は未加工のままで段差加工接続先端部とされ、また第一外部導体と第二外部導体からなる外部導体の先端面付近を除いた第二外部導体の外周表面に接着剤が塗布され、先端部が内側に向かって延設されたフランジを有し且つ内面に突起を備え、好ましくはフランジに向かって先細りとなるテーパー付きの穴を有する金属製シェルの該フランジ内壁に、前記段差加工接続先端部の外部導体先端面が突き当たるまで圧入され、フランジ内壁と該先端面の突き当たり圧着部を電気的接続部とし、前記塗布された接着剤が硬化され、段差加工接続先端部および金属製シェルが機械的に固着され、電気的に接続されたシェル装着ケーブル体とし、これを同軸型コネクタ本体に装着した事を特徴とする高性能セミリジッド同軸ケーブルアセンブリにある。
上記第７観点の同軸ケーブルアセンブリでは、セミリジッド同軸ケーブルと同軸型コネクタとを接続する際、従来からの半田接続方式ではなく、内面に突起を備え、好ましくはフランジに向かって先細りとなるテーパー付きの穴を有する金属製シェルを用い、接着剤を併用し、シェル先端部のフランジ内壁にケーブルの二層の外部導体先端面を突き当て、二層の外部導体およびシェルを機械的に固着させ電気的に接続した方式であるので、従来のような半田接続に起因する問題点が生じることはなく、65GHzを越える高周波帯域まで良好な伝送特性が得られる。
As a seventh aspect, the present invention provides a semi-rigid coaxial cable assembly having a structure in which the high-performance semi-rigid coaxial cable according to the first, second, third, fourth, and fifth aspects and a coaxial connector are connected. The connector connecting tip is stepped so that the center conductor and the second outer conductor (the first outer conductor and the insulator are flush with each other (the end faces are the same)) are successively exposed for a predetermined length. outer peripheral surface of the second outer conductor is a step processing connection tip remains unprocessed, the outer peripheral table surface of the second outer conductor except for the outer conductor near the tip face of consisting of the first outer conductor and the second outer conductor was or the adhesive is applied, comprises projections on and the inner surface has a flange tip is extended towards the inside, preferably a metal having a bore with a taper tapers toward the flange It is press-fitted into the flange inner wall of the well until the outer conductor tip surface of the stepped machining connection tip abuts, and the crimped part is brought into contact with the flange inner wall and the tip surface, and the applied adhesive is cured. A high-performance semi-rigid coaxial cable assembly characterized in that a step mounting connection tip and a metal shell are mechanically fixed and electrically connected to form a shell-attached cable body, which is attached to a coaxial connector body. It is in.
In the coaxial cable assembly according to the seventh aspect, when connecting the semi-rigid coaxial cable and the coaxial connector, it is not a conventional solder connection method, but has a protrusion on the inner surface, and preferably has a taper that tapers toward the flange. Using a metal shell with holes, using an adhesive together, abutting the two-layer outer conductor tip of the cable against the flange inner wall of the shell tip, and mechanically fixing the two-layer outer conductor and shell Therefore, there is no problem caused by solder connection as in the prior art, and good transmission characteristics can be obtained up to a high frequency band exceeding 65 GHz.
第８の観点として本発明は、上記第１、２、３または４および５観点の高性能セミリジッド同軸ケーブルと同軸型コネクタとを接続した構造のセミリジッド同軸ケーブルアセンブリであって、前記セミリジッド同軸ケーブルのコネクタ接続先端部は、中心導体、第二の外部導体（第一の外部導体および絶縁体とは面一（それぞれの端面が同一面））が順次露出するよう段差加工され、また第二の外部導体の外周表面は螺旋状凹凸加工が施されて段差・螺旋状凹凸加工接続先端部とされ、また第一外部導体と第二外部導体からなる外部導体の先端面付近を除いた第二外部導体の外周表面に接着剤が塗布され、フランジを有しない筒状の内面に螺旋状凹凸加工が施された金属製シェルの該シェル先端面よりも第二外部導体の先端面が若干突き出る状態まで回転挿入され、塗布された接着剤が硬化され、前記段差加工接続先端部および金属製シェルが機械的に固着され、シェル装着ケーブル体とし、これを同軸型コネクタ本体に装着した事を特徴とする高性能セミリジッド同軸ケーブルアセンブリにある。
上記第８観点の同軸ケーブルアセンブリでは、セミリジッド同軸ケーブルと同軸型コネクタとを接続する際、従来からの半田接続方式ではなく、フランジを有しない筒状の金属製シェルを用い、接着剤を使用して二層の外部導体およびシェルを機械的に固着させた方式であるので、従来のような半田接続に起因する問題点が生じることはなく、65GHzを越える高周波帯域まで良好な伝送特性が得られる。
As an eighth aspect, the present invention provides a semi-rigid coaxial cable assembly having a structure in which the high-performance semi-rigid coaxial cable according to the first, second, third, fourth, and fifth aspects and a coaxial connector are connected. The connector connection tip is stepped so that the center conductor and the second outer conductor (the first outer conductor and the insulator are flush with each other (each end face is the same surface)) are sequentially exposed. outer peripheral surface of the conductor is a is subjected spiral roughened stepped-helical roughened connection tip, the second external, except for the outer conductor near the tip face of consisting of the first outer conductor and the second outer conductor was or adhesive is applied to the outer circumferential table surface of the conductor, the distal end surface of the second outer conductor than the shell leading end surface of the metallic shell spiral roughened is subjected to no cylindrical inner surface of the flange protrudes slightly It is rotated and inserted to the state, the applied adhesive is cured, the step processed connection tip and the metal shell are mechanically fixed, and it is a shell mounting cable body, which is mounted on the coaxial connector body Is in a high performance semi-rigid coaxial cable assembly.
Above the coaxial cable assembly of the eighth view point, when connecting the semi-rigid coaxial cable and the coaxial connector, rather than the solder connection method from the prior art, using a metal shell having no tubular flange, using an adhesive Since the two-layer outer conductor and shell are mechanically fixed, there is no problem caused by solder connection as in the past, and good transmission characteristics are obtained up to a high frequency band exceeding 65 GHz. It is done.
第９の観点として本発明は、上記各観点の同軸型コネクタ本体が、プラグタイプの同軸型コネクタ本体、ジャックタイプの同軸型コネクタ本体、またはケーブル導体を直に中心コンタクトに用いたプラグタイプの同軸型コネクタ本体であり、これらのコネクタ本体にシェル装着ケーブル体が挿入され、金属製クランプにて締め付け固定されていることを特徴とする高性能セミリジッド同軸ケーブルアセンブリにある。
上記第９観点の同軸ケーブルアセンブリでは、上記各観点の同軸型コネクタ本体として、プラグタイプの同軸型コネクタ本体、ジャックタイプの同軸型コネクタ本体、またはケーブル導体を直に中心コンタクトに用いたプラグタイプの同軸型コネクタ本体を用い、これらのコネクタ本体に前記シェル装着ケーブル体を挿入し、金属製クランプにて締め付け固定することにより優れた電気的特性を有し、且つ多彩なシリーズ化が可能な同軸ケーブルアセンブリとすることができる。
According to a ninth aspect of the present invention, the coaxial connector main body according to each of the above aspects is a plug-type coaxial connector body using a plug-type coaxial connector body, a jack-type coaxial connector body, or a cable conductor directly as a center contact. A high-performance semi-rigid coaxial cable assembly is characterized in that a shell-attached cable body is inserted into these connector bodies and is fastened and fixed by a metal clamp.
Above the coaxial cable assembly of the ninth view point, as a coaxial connector body of the respective viewpoints, plug type coaxial connector body, the jack type coaxial connector body or plug type using the direct center contact the cable conductor, Coaxial connector bodies, which have excellent electrical characteristics by inserting the shell mounting cable bodies into these connector bodies and tightening and fixing them with metal clamps. It can be a cable assembly.
本発明による高性能セミリジッド同軸ケーブルにおいては、絶縁体として電気特性や耐環境性能に優れた多孔質未焼結PTFE樹脂を使用しているため、充実タイプを使用した場合よりも温度変化に対する体積変動が小さく、ケーブルは温度変化に伴う電気特性の変動（例えば位相変動）が小さくなる。また本発明の同軸ケーブルは、第一の外部導体として良導電性の金属箔、例えば銀めっき圧延軟銅テープを螺旋巻きした後、第二の外部導体である金属製パイプを被せているため、絶縁体上に直接アルミパイプやステンレスパイプなどを被せた場合よりも格段に挿入損失特性が向上する。つまり、電気特性を決めている部位は第一外部導体であり、第二外部導体は電気特性に影響を与えないため、あらゆる金属が対応可能になりケーブルに新たな付加価値を持たせることが出来る。
また、良導電性金属箔の幅W(mm)と厚さＴ(mm)を特定した本発明のセミリジッド同軸ケーブルにおいては、一定張力による均一な巻き回しが可能となり、これにより金属箔の螺旋巻きによる外部導体の内面の凹凸、すなわち絶縁体表面の凹凸が分散し且つ滑らかになるため、周期的な不連続ピッチが緩和され特定周波数の反射スパイクが低減出来る。また前記第二外部導体の金属製パイプの材質をアルミニウムとした場合は、同軸ケーブルの軽量化が計れるので好ましい。また第二外部導体の金属製パイプの材質をステンレスとした場合は、同軸ケーブルの断熱性や耐腐食性が良くなるので好ましい。なお、ベリリウム銅やリン青銅を用いても断熱効果が期待でき、リン青銅や黄銅を用いた場合には非磁性化が計れ、その用途に有用である。
更に本発明による同軸ケーブルアセンブリにおいては、コネクタ接続先端部はセミリジッド同軸ケーブルを中心導体、第二外部導体が順次露出するよう段差加工し、また場合によっては前記特定加工を施し、また接着剤と併用し、外部導体外周上に前記特定構造の金属製シェルを装着後、同軸型コネクタ本体に機械的・電気的に確実に接続した方式であるので、従来のような半田接続に起因する問題点が生じることはなく、65GHzを越える高周波帯域まで良好な伝送特性が得られる。
従って、本発明は産業上に寄与する効果が極めて大である。
The high-performance semi-rigid coaxial cable according to the present invention uses porous unsintered PTFE resin with excellent electrical characteristics and environmental resistance as an insulator, so the volume fluctuation with temperature change is more than when using the full type. The cable has a small electrical characteristic variation (for example, phase variation) due to a temperature change. In addition, the coaxial cable of the present invention is insulated because the first outer conductor is a highly conductive metal foil, for example, a silver-plated rolled annealed copper tape is spirally wound and then a second outer conductor metal pipe is covered. Insertion loss characteristics are significantly improved compared to the case of directly covering the body with an aluminum pipe or a stainless steel pipe. In other words, the part that determines the electrical characteristics is the first outer conductor, and the second outer conductor does not affect the electrical characteristics. Therefore, any metal can be used and the cable can have a new added value. .
In addition, the semi-rigid coaxial cable of the present invention in which the width W (mm) and the thickness T (mm) of the highly conductive metal foil are specified enables uniform winding with a constant tension, which enables spiral winding of the metal foil. Since the unevenness on the inner surface of the outer conductor, that is, the unevenness on the surface of the insulator, is dispersed and smoothed, the periodic discontinuous pitch is relaxed, and the reflection spike of a specific frequency can be reduced. Further, when the material of the metal pipe of the second outer conductor is aluminum, it is preferable because the weight of the coaxial cable can be reduced. Also, it is preferable to use stainless steel as the material of the metal pipe of the second outer conductor because the heat insulation and corrosion resistance of the coaxial cable are improved. In addition, even if beryllium copper or phosphor bronze is used, a heat insulation effect can be expected, and when phosphor bronze or brass is used, demagnetization can be achieved and it is useful for its use.
Further, in the coaxial cable assembly according to the present invention, the connector connecting tip is processed with a step so that the central conductor and the second outer conductor are sequentially exposed in the semi-rigid coaxial cable, and in some cases, the above-mentioned specific processing is performed and also used in combination with an adhesive. In addition, since the metal shell having the specific structure is mounted on the outer periphery of the outer conductor and then is mechanically and securely connected to the coaxial connector body, there is a problem caused by the conventional solder connection. It does not occur, and good transmission characteristics can be obtained up to a high frequency band exceeding 65 GHz.
Therefore, the present invention has an extremely large effect contributing to the industry.
以下、本発明の内容を、図に示す実施の形態により更に詳細に説明する。なお、これにより本発明が限定されるものではない。
図１は、本発明のセミリジッド同軸ケーブルの第１実施形態（実施例１）を示す断面図である。図２は、本発明のセミリジッド同軸ケーブルの第２実施形態（実施例２）を示す断面図である。図６はセミリジッド同軸ケーブルの外部導体材質、絶縁体材質の違いによる挿入損失特性を示すチャートである。図７はセミリジッド同軸ケーブルの絶縁体材質の違いによる温度変化に伴う位相変動を示すチャートである。図８は、本発明に係る同軸ケーブルアセンブリにおいて、セミリジッド同軸ケーブルおよび接続先端部を説明するための略図であり、左方部は段差・螺旋状凹凸加工接続先端部の構成、また右方部はケーブルの構成を示す（実施例１の同軸ケーブルの外周に絶縁シースを被覆した構造）。図９は、本発明に係る同軸ケーブルアセンブリの第１実施形態（実施例３）を説明するための略図であり、段差・螺旋状凹凸加工接続先端部を設けたセミリジッド同軸ケーブルを、フランジ・螺旋状凹凸加工有の金属製シェルに装着したシェル装着ケーブル体と、中心コンタクト繋ぎ替えプラグタイプの同軸型コネクタとの同軸ケーブルアセンブリを示す要部縦断面図である。図10は、本発明に係る同軸ケーブルアセンブリの第２実施形態（実施例４）を説明するための略図であり、段差加工接続先端部を設けたセミリジッド同軸ケーブルを、フランジ・内面突起有の金属製シェルに装着したシェル装着ケーブル体と、中心コンタクト繋ぎ替えジャックタイプの同軸型コネクタとの接続構造を示す要部縦断面図である。また図11は、本発明に係る同軸ケーブルアセンブリの第３実施形態（実施例５）を説明するための略図であり、段差加工接続先端部を設けたセミリジッド同軸ケーブルを、フランジ無の筒状の金属製シェルに装着したシェル装着ケーブル体と、中心コンタクト繋ぎ替えプラグタイプの同軸型コネクタとの同軸ケーブルアセンブリを示す要部縦断面図である。
これらの図において、１は中心導体、２は絶縁体、３は外部導体、３ａは第一外部導体（金属箔外部導体）、３ｂは第二外部導体（金属パイプ外部導体）、４は絶縁シース、１０a、１０b、１０cは本発明の高性能セミリジッド同軸ケーブル、１０tは接続先端部（段差・螺旋状凹凸加工接続先端部）（段差加工接続先端部）、１１は金属製シェル、１１ａはシェル装着ケーブル体、１２は金属製クランプ、１３はケーブル保護パイプ部、１４はテーパー部、１５はカップリングナット、１６はガスケット、１７はリティニングリング、２３ａ、２３ｂは熱収縮チューブ、３０は高性能セミリジッド同軸ケーブルアセンブリ（中心コンタクト繋ぎ替えプラグタイプの同軸型コネクタアセンブリ）、３１は中心コンタクト繋ぎ替え部を備えたプラグコネクタ本体、３２は中心コンタクト繋ぎ替え部、４０は高性能セミリジッド同軸ケーブルアセンブリ（中心コンタクト繋ぎ替えジャックタイプの同軸型コネクタアセンブリ）、４１はジャックタイプ変換部を備えたジャックコネクタ本体、４２はジャックタイプ変換部、５０は高性能セミリジッド同軸ケーブルアセンブリ（中心コンタクト繋ぎ替えプラグタイプの同軸型コネクタアセンブリ）、５１は中心コンタクト繋ぎ替え部を備えたプラグコネクタ本体、５２は中心コンタクト繋ぎ替え部、fはフランジ、gは外部導体先端面、hは中心導体嵌合部、iは相手側中心コンタクト嵌合部、jはねじ山部、kは中心コンタクトピン、rは螺旋状凹凸加工面、r’は螺旋状凹凸加工、sは接着剤、またtは突起である。
Hereinafter, the contents of the present invention will be described in more detail with reference to embodiments shown in the drawings. Note that the present invention is not limited thereby.
FIG. 1 is a cross-sectional view showing a first embodiment (Example 1) of the semi-rigid coaxial cable of the present invention. FIG. 2 is a cross-sectional view showing a second embodiment (Example 2) of the semi-rigid coaxial cable of the present invention. FIG. 6 is a chart showing insertion loss characteristics depending on the outer conductor material and the insulator material of the semi-rigid coaxial cable. FIG. 7 is a chart showing the phase fluctuation accompanying the temperature change due to the difference in the insulator material of the semi-rigid coaxial cable. FIG. 8 is a schematic diagram for explaining the semi-rigid coaxial cable and the connecting tip in the coaxial cable assembly according to the present invention, where the left part is the configuration of the step / spiral uneven processing connecting tip, and the right part is The structure of the cable is shown (a structure in which the outer periphery of the coaxial cable of Example 1 is covered with an insulating sheath). FIG. 9 is a schematic diagram for explaining the first embodiment (Example 3) of the coaxial cable assembly according to the present invention, in which a semi-rigid coaxial cable provided with a step / spiral unevenness connecting tip is provided with a flange / spiral. It is a principal part longitudinal cross-sectional view which shows the coaxial cable assembly of the shell mounting | wearing cable body mounted | worn with the metal shell with uneven | corrugated process, and the center contact connection plug type coaxial connector. FIG. 10 is a schematic view for explaining a second embodiment (Example 4) of the coaxial cable assembly according to the present invention, in which a semi-rigid coaxial cable provided with a step-processed connection tip is formed with a metal having a flange and an inner surface protrusion. It is a principal part longitudinal cross-sectional view which shows the connection structure of the shell mounting | wearing cable body with which the made-in-shell was mounted | worn, and a center contact switching jack type coaxial connector. FIG. 11 is a schematic view for explaining a third embodiment (Example 5) of the coaxial cable assembly according to the present invention, in which a semi-rigid coaxial cable provided with a step-processed connection tip is formed into a cylindrical shape without a flange. It is a principal part longitudinal cross-sectional view which shows the coaxial cable assembly of the shell mounting | wearing cable body with which the metal shell was mounted | worn, and a center contact connection plug type coaxial connector.
In these drawings, 1 is a central conductor, 2 is an insulator, 3 is an external conductor, 3a is a first external conductor (metal foil external conductor), 3b is a second external conductor (metal pipe external conductor), and 4 is an insulating sheath. 10a, 10b, 10c are high-performance semi-rigid coaxial cables of the present invention, 10t is a connecting tip (step / spiral uneven connecting tip) (step processed connecting tip), 11 is a metal shell, and 11a is a shell. Cable body, 12 is a metal clamp, 13 is a cable protection pipe part, 14 is a taper part, 15 is a coupling nut, 16 is a gasket, 17 is a retaining ring, 23a and 23b are heat shrinkable tubes, and 30 is a high performance semi-rigid Coaxial cable assembly (coaxial connector assembly of central contact switching plug type), 31 is a plug with a central contact switching portion Connector body, 32 is a center contact switching part, 40 is a high performance semi-rigid coaxial cable assembly (center contact switching jack type coaxial connector assembly), 41 is a jack connector body having a jack type conversion part, and 42 is a jack type. Conversion unit, 50 is a high performance semi-rigid coaxial cable assembly (coaxial connector assembly of central contact switching plug type), 51 is a plug connector body having a central contact switching unit, 52 is a central contact switching unit, and f is a flange. , G is the outer conductor front end surface, h is the center conductor fitting portion, i is the mating center contact fitting portion, j is the threaded portion, k is the center contact pin, r is the spiral uneven surface, r 'is the spiral Concavo-convex processing, s is an adhesive, and t is a protrusion.
−セミリジッド同軸ケーブル−
本発明のセミリジッド同軸ケーブルの実施例１について図１を用いて説明する。
外径0.510mmの銀めっき銅被覆鋼線（SPCP）を中心導体１とし、中心導体１の外周に多孔質未焼結PTFE樹脂（気孔率35％）の絶縁体２を厚さ0.49mmで形成し、その外側に外部導体３として、先ず、幅W(mm)と厚さＴ(mm)が前記(1)、(2)式を満足するテープ状の金属箔、即ち、幅2.0mm厚さ0.033mmの銀めっき圧延軟銅テープを、定テンションテーピングマシンを用い、重なりおよそ37%にて一定の巻き張力、例えば500g±30gで螺旋巻きして第一外部導体（金属箔外部導体）３ａを設け、更にその外側にアルミ製パイプを被せダイス引きして該外部導体３ａに密着させ、厚さ0.29mmの第二外部導体（金属パイプ外部導体）３ｂを設け外径2.19mmの高性能セミリジッド同軸ケーブル１０ａを得た。本実施例の同軸ケーブル１０ａは、電気特性に優れ、軽量化が計られているので高周波機器類用として好適である。
ここで、中心導体１には外径0.510mmの銀めっき銅被覆鋼線を用いたが、用途に合わせ他の外径サイズや構成、材質、めっき品でも良い。絶縁体２は多孔質未焼結PTFE樹脂以外の電気特性に優れた絶縁材料に変更可能で、適用方法は押し出し被覆の他、テープ巻きでも良い。また、第一外部導体３ａの金属箔はスリット品や良導電性の他のめっき品、蒸着品、金属箔にプラスチックフィルムをラミネートした片面・両面金属ラミネートテープ、金属めっきテープでも良い。また、第一外部導体３aの金属箔は螺旋巻き以外に縦添えでも良い。また、第二外部導体３ｂのサイズや材質の変更も可能である。更に必要に応じ第二外部導体３ｂの外周に絶縁シースを施してもよい。
-Semi-rigid coaxial cable-
Example 1 of the semi-rigid coaxial cable of the present invention will be described with reference to FIG.
A silver-plated copper-clad steel wire (SPCP) with an outer diameter of 0.510 mm is used as the central conductor 1, and an insulator 2 of porous unsintered PTFE resin (porosity 35%) is formed on the outer periphery of the central conductor 1 to a thickness of 0.49 mm. As the outer conductor 3 on the outside, a tape-shaped metal foil whose width W (mm) and thickness T (mm) satisfy the above formulas (1) and (2), ie, a width of 2.0 mm The first outer conductor (metal foil outer conductor) 3a is provided by spirally winding 0.033mm silver-plated rolled anodized copper tape with a constant tension taping machine at a constant winding tension of approximately 37%, for example, 500g ± 30g. Further, an aluminum pipe is put on the outer side and the die is drawn and brought into close contact with the outer conductor 3a. A second outer conductor (metal pipe outer conductor) 3b having a thickness of 0.29 mm is provided, and a high performance semi-rigid coaxial cable having an outer diameter of 2.19 mm. 10a was obtained. The coaxial cable 10a of the present embodiment is suitable for high frequency equipment because of its excellent electrical characteristics and light weight.
Here, a silver-plated copper-coated steel wire having an outer diameter of 0.510 mm is used for the center conductor 1, but other outer diameter sizes, configurations, materials, and plated products may be used depending on the application. The insulator 2 can be changed to an insulating material excellent in electrical characteristics other than the porous unsintered PTFE resin, and the application method may be tape winding in addition to extrusion coating. The metal foil of the first outer conductor 3a may be a slit product, another plated product with good conductivity, a vapor-deposited product, a single-sided / double-sided metal laminated tape obtained by laminating a plastic film on the metal foil, or a metal plated tape. Further, the metal foil of the first outer conductor 3a may be vertically attached in addition to the spiral winding. Also, the size and material of the second outer conductor 3b can be changed. Furthermore, you may give an insulation sheath to the outer periphery of the 2nd outer conductor 3b as needed.
−セミリジッド同軸ケーブル−
本発明のセミリジッド同軸ケーブルの実施例２について図２を用いて説明する。
外径0.287mmの銀めっきベリリウム銅線（ベリリウム銅＋青化銅めっき下地処理0.5μm＋銀めっき5μm）を中心導体１とし、中心導体１の外周に多孔質未焼結PTFE樹脂の絶縁体２を厚さ0.27mmで形成し、その外側に外部導体３として、先ず、幅W(mm)と厚さＴ(mm)が前記(1)、(2)式を満足するテープ状の金属箔、即ち、幅0.8mm厚さ0.015mmの圧延銀めっき軟銅箔を、定テンションテーピングマシンを用い、重なりおよそ35%にて一定の巻き張力で均一に螺旋巻きして第一外部導体３ａを設け、更にその外側にステンレス製パイプを被せダイス引きして該外部導体３ａに密着させ厚さ0.16mmの第二外部導体３ｂを設け高性能セミリジッド同軸ケーブル１０ｂを得た。なお本実施例の同軸ケーブルは、高周波用途の細径の特殊なタイプで、極低温での使用、嫌磁性、耐腐食性、最大110GHzまでの超高周波且つ低損失要求の対応品として好適である。
-Semi-rigid coaxial cable-
A second embodiment of the semi-rigid coaxial cable of the present invention will be described with reference to FIG.
A silver-plated beryllium copper wire with an outer diameter of 0.287 mm (beryllium copper + copper bronze plating surface treatment 0.5 μm + silver plating 5 μm) is used as the central conductor 1, and a porous unsintered PTFE resin insulator 2 is provided around the center conductor 1. A tape-shaped metal foil having a thickness W (mm) and a thickness T (mm) satisfying the above formulas (1) and (2) is formed as an outer conductor 3 on the outer side thereof. A rolled silver-plated annealed copper foil having a width of 0.8 mm and a thickness of 0.015 mm is uniformly spirally wound at a constant winding tension with a constant tension taping machine to provide a first outer conductor 3a. A stainless steel pipe was put on the outside and the die was drawn to closely contact the outer conductor 3a to provide a second outer conductor 3b having a thickness of 0.16 mm to obtain a high performance semi-rigid coaxial cable 10b. The coaxial cable of this embodiment is a special type of small diameter for high frequency applications, and is suitable for use at extremely low temperatures, anaerobic, corrosion resistance, ultra high frequency up to 110 GHz and low loss requirements. .
―セミリジッド同軸ケーブルアセンブリ−
本発明の同軸ケーブルアセンブリの第１実施形態（実施例３）について図８、９を用いて説明する。なお本実施例はセミリジッド同軸ケーブルと中心コンタクト繋ぎ替えプラグタイプの同軸型コネクタとのアセンブリである。
先ず、段差・螺旋状凹凸加工接続先端部を設けたセミリジッド同軸ケーブルについて図８を用いて説明する。
実施例１（図１）に示す同軸ケーブル１０aの外周に絶縁シース４としてFEP（テトラフルオロエチレンヘキサフルオロプロピレン共重合体）を0.25mm厚さ被覆した構造の同軸ケーブル１０cの接続先端部を形成するため、シース４を剥離して第二外部導体３bを露出した。次いで、中心導体１が露出するよう段差剥離した。この際、第一外部導体３aと絶縁体２は第二外部導体３bと面一とした。次いで、第二外部導体３b表面には専用ねじ切りダイス（Groove
Dice）を用いた粗雄ねじ加工（Spiral Groove加工）を施して螺旋状凹凸加工面ｒを設けて段差・螺旋状凹凸加工接続先端部１０tとし、更に螺旋状凹凸加工面ｒには接着剤ｓを塗布した。該接着剤ｓとしては、エポキシ系接着剤、例えば、エポキシ・テクノロジー社（ビレリカ.マサチューセッツ）によって「EPO-TEK
353ND」の商品名で市販されている非導電性２液型接着剤などが好ましい。なお、接着剤ｓは第一外部導体３aと第二外部導体３bからなる外部導体３の先端面（フランジの内壁に突き当てる面）g付近には塗布しなかった。
-Semi-rigid coaxial cable assembly-
A first embodiment (Example 3) of the coaxial cable assembly of the present invention will be described with reference to FIGS. The present embodiment is an assembly of a semi-rigid coaxial cable and a central contact reconnecting plug type coaxial connector.
First, a semi-rigid coaxial cable provided with a step / spiral concavo-convex processed connection tip will be described with reference to FIG.
A connection tip of a coaxial cable 10c having a structure in which FEP (tetrafluoroethylene hexafluoropropylene copolymer) is coated to a thickness of 0.25 mm is formed as an insulating sheath 4 on the outer periphery of the coaxial cable 10a shown in Example 1 (FIG. 1). Therefore, the sheath 4 was peeled off to expose the second outer conductor 3b. Next, the step was peeled off so that the central conductor 1 was exposed. At this time, the first outer conductor 3a and the insulator 2 were flush with the second outer conductor 3b. Next, a dedicated threading die (Groove) is formed on the surface of the second outer conductor 3b.
A rough grooving process is applied to provide a spiral concavo-convex surface r to form a step / spiral concavo-convex connection tip 10t, and an adhesive s is applied to the spiral concavo-convex surface r. Applied. As the adhesive s, an epoxy adhesive, for example, “EPO-TEK” by Epoxy Technology (Billerica, Massachusetts) is used.
Non-conductive two-component adhesives marketed under the trade name “353ND” are preferred. The adhesive s was not applied to the vicinity of the front end surface (surface that abuts against the inner wall of the flange) g of the outer conductor 3 composed of the first outer conductor 3a and the second outer conductor 3b.
続いて図９に示すように、先端部が内側に向かって延設されたフランジfを有し且つ内面に螺旋状凹凸加工r’がなされた金属製シェル１１に、前記接着剤sが塗布された段差・螺旋状凹凸加工接続先端部１０tを、前記フランジfの内壁に外部導体３の先端面gが突き当たり圧着されるまで回転挿入し、フランジｆ内壁と先端面gの突き当たり圧着部を電気的接続部とした。続いて、塗布された接着剤ｓを70℃×60分の硬化条件で硬化し、前記加工接続先端部１０tと金属製シェル１１を機械的に固着してシェル装着ケーブル体１１ａとした。なお、該シェル装着ケーブル体１１ａのケーブル部１０cには金属製クランプ１２を予め装着しておいた。次いで、シェル装着ケーブル体１１ａは、カップリングナット１５、リティニングリング１７、ガスケット１６を備え、別の片側に中心コンタクトピンkを有する中心コンタクト繋ぎ替え部３２を備えたプラグコネクタ本体３１（中心コンタクト繋ぎ替えプラグタイプの同軸型コネクタ（Plug(male)connector））に挿入し、金属製クランプ１２にてきつく締め付け固定して機械的・電気的に確実に接続し、高性能セミリジッド同軸ケーブルアセンブリ３０を完成させた。
なお、上記螺旋状凹凸接合のみでも金属製シェル１１先端部のフランジf内壁にケーブルの外部導体先端面gが圧着するため、良好な伝送特性は得られるが、機械的強度を確保する意味で接着剤は必要である。また上記エポキシ系接着剤「EPO-TEK
353ND」の硬化条件は、70℃×60分の他150℃×1分、60℃×90分が選択可能である。むろん接着剤には「EPO-TEK 353ND」以外の、これと同等性能以上の機械的強度や耐環境性を有するエポキシ系接着剤（２液タイプの他、１液タイプや導電性タイプ）、その他の接着剤を用いても何ら問題はない。ただし、導電タイプは非導電タイプに比べ一般的に接着強度は劣るうえに、本発明の接着箇所は導電性能を必要としない。
Subsequently, as shown in FIG. 9, the adhesive s is applied to the metal shell 11 having a flange f with the tip portion extending inwardly and the inner surface of which has a spiral unevenness r ′. Then, the step 10t is connected to the inner wall of the flange f until the front end surface g of the outer conductor 3 is pressed against the inner wall of the flange f. It was set as the connection part. Subsequently, the applied adhesive s was cured under a curing condition of 70 ° C. × 60 minutes, and the processed connection tip 10t and the metal shell 11 were mechanically fixed to form a shell-attached cable body 11a. A metal clamp 12 was previously attached to the cable portion 10c of the shell attachment cable body 11a. Next, the shell-attached cable body 11a includes a coupling connector 15, a retaining ring 17, and a gasket 16, and a plug connector body 31 (center contact) including a center contact switching portion 32 having a center contact pin k on another side. Insert into the reconnecting plug type coaxial connector (Plug (male) connector)), and tighten and fix it firmly to the metal clamp 12 to ensure a mechanical and electrical connection. The high-performance semi-rigid coaxial cable assembly 30 Completed.
In addition, since the outer conductor front end face g of the cable is crimped to the inner wall of the flange f at the front end of the metal shell 11 even with only the above-described helical concavo-convex joint, good transmission characteristics can be obtained, but bonding is performed to ensure mechanical strength. Agent is necessary. In addition, the epoxy adhesive “EPO-TEK”
The curing conditions for “353ND” can be selected from 70 ° C. × 60 minutes, 150 ° C. × 1 minute, and 60 ° C. × 90 minutes. Of course, for adhesives other than “EPO-TEK 353ND”, epoxy adhesives with mechanical strength and environmental resistance equal to or better than this (two-component type, one-component type and conductive type), and others There is no problem even if this adhesive is used. However, the conductive type is generally inferior in adhesive strength to the non-conductive type, and the bonded portion of the present invention does not require conductive performance.
―セミリジッド同軸ケーブルアセンブリ−
本発明の同軸ケーブルアセンブリの第２実施形態（実施例４）について図10を用いて説明する。なお本実施例はセミリジッド同軸ケーブルとジャックタイプの同軸型コネクタとの接続構造である。なお上述の実施例３のプラグタイプに対してジャックタイプは、ケーブル装着シェル体１１ａを、片側に中心導体１の嵌合部ｈを備え、別の片側に相手側プラグコネクタの中心コンタクトの嵌合部ｉを有するジャックタイプ変換部４２をコネクタ本体中に備えたジャックコネクタ本体４１とした構造である。
先ず図８のセミリジッド同軸ケーブル１０cの接続先端部を形成するため、上記実施例３と同様にして第二外部導体３bと中心導体１が露出するよう段差加工し、螺旋状凹凸加工は施さずに段差加工接続先端部１０tとし、また実施例３と同様、露出した第二外部導体３bの外周表面に接着剤sを塗布し、先端部が内側に向かって延設されたフランジfを有し且つ内面に突起tを備えた金属製シェル１１に前記フランジfの内壁に外部導体３の先端面gが突き当たり圧着されるまで挿入し、フランジｆ内壁と先端面gの突き当たり圧着部を電気的接続部とした。続いて、塗布された接着剤ｓを70℃×60分の硬化条件で硬化し、前記段差加工接続先端部１０tと金属製シェル１１を機械的に固着してシェル装着ケーブル体１１ａとした。次いで、シェル装着ケーブル体１１ａは、別の片側に相手側中心コンタクト嵌合部iを有するジャックタイプ変換部４２を備えたジャックコネクタ本体４１（Jack(female)connector）に挿入し、金属製クランプ１２にてきつく締め付け固定し、そして、ジャックコネクタ本体４１の片端に施されたねじ山部jにより、相手側プラグコネクタのカップリングナット（図示せず）とねじ嵌合して機械的・電気的に確実に接続可能な、高性能セミリジッド同軸ケーブルアセンブリ４０を完成させた。なおこれ以外については、前記実施例３と同様とした。
-Semi-rigid coaxial cable assembly-
A second embodiment (Example 4) of the coaxial cable assembly of the present invention will be described with reference to FIG. This embodiment is a connection structure between a semi-rigid coaxial cable and a jack-type coaxial connector. The jack type of the plug type of the third embodiment described above includes the cable mounting shell body 11a, the fitting portion h of the center conductor 1 on one side, and the fitting of the center contact of the mating plug connector on the other side. The jack connector body 41 includes a jack type converter 42 having a portion i in the connector body.
First, in order to form the connecting tip of the semi-rigid coaxial cable 10c of FIG. 8, the step is processed so that the second outer conductor 3b and the center conductor 1 are exposed in the same manner as in the third embodiment, and the spiral unevenness is not performed. and step processing connection tip 10t, also similarly to example 3, the adhesive s was applied to the outer circumferential table surface of the second outer conductor 3b exposed, a flange f the tip is extended inward The inner surface of the flange f is inserted into the metal shell 11 having the protrusion t on the inner surface until the front end surface g of the outer conductor 3 comes into contact with the inner wall of the flange f and is electrically connected to the contact portion between the inner wall of the flange f and the front end surface g. The part. Subsequently, the applied adhesive s was cured under a curing condition of 70 ° C. × 60 minutes, and the step processed connection tip 10t and the metal shell 11 were mechanically fixed to form a shell-attached cable body 11a. Next, the shell-attached cable body 11a is inserted into a jack connector body 41 (Jack (female) connector) having a jack type conversion part 42 having a mating center contact fitting part i on another side, and the metal clamp 12 The screw connector j is attached to one end of the jack connector body 41 and is screwed with a coupling nut (not shown) of the mating plug connector to mechanically and electrically. A high performance semi-rigid coaxial cable assembly 40 that can be securely connected was completed. Other than this, it was the same as in Example 3.
―セミリジッド同軸ケーブルアセンブリ−
本発明の同軸ケーブルアセンブリの第３実施形態（実施例５）について図11を用いて説明する。なお本実施例は実施例３と同様、セミリジッド同軸ケーブルと中心コンタクト繋ぎ替えプラグタイプの同軸型コネクタとの接続構造である。但し、フランジを有しない筒状の金属製シェル１１を用い、先ず図８のセミリジッド同軸ケーブル１０cの接続先端部を形成するため、上記実施例３と同様にして第二外部導体３bと中心導体１が露出するよう段差加工し、螺旋状凹凸加工を施し、段差螺旋状凹凸加工接続先端部１０tとし、また実施例３と同様、露出した第二外部導体３bの外周表面に接着剤sを塗布し、金属製シェル１１先端面よりも外部導体３の先端面gが若干突き出た状態で塗布された接着剤ｓを70℃×60分の硬化条件で硬化し、前記段差加工接続先端部１０tと金属製シェル１１を機械的に固着してシェル装着ケーブル体１１ａとした。次いでシェル装着ケーブル体１１ａを、中心コンタクト繋ぎ替え部５２を備えたプラグコネクタ本体５１（Plug(male)connector）に装着し、金属製クランプ１２にてきつく締め付け固定して機械的・電気的に確実に接続し、高性能セミリジッド同軸ケーブルアセンブリ５０とした。なおこれ以外については、前記実施例３と同様とした。
-Semi-rigid coaxial cable assembly-
A third embodiment (Example 5) of the coaxial cable assembly of the present invention will be described with reference to FIG. As in the third embodiment, the present embodiment is a connection structure between a semi-rigid coaxial cable and a center contact switching plug type coaxial connector. However, in order to form the connection tip of the semi-rigid coaxial cable 10c of FIG. 8 using a cylindrical metal shell 11 having no flange, the second outer conductor 3b and the center conductor 1 are formed in the same manner as in the third embodiment. There was step processing to expose performs helical roughened, and stepped spiral roughened connecting tip 10t, also similarly to example 3, the adhesive s applied to the outer circumferential table surface of the second outer conductor 3b exposed Then, the adhesive s applied with the tip surface g of the outer conductor 3 protruding slightly from the tip surface of the metal shell 11 is cured under a curing condition of 70 ° C. × 60 minutes, and the step processed connection tip portion 10t A metal shell 11 was mechanically fixed to form a shell mounting cable body 11a. Next, the shell mounting cable body 11a is mounted on a plug connector main body 51 (Plug (male) connector) having a center contact switching portion 52, and is firmly tightened and fixed to the metal clamp 12 to ensure mechanical and electrical reliability. To provide a high performance semi-rigid coaxial cable assembly 50. Other than this, it was the same as in Example 3.
―特性試験―
本発明実施例の高性能セミリジッド同軸ケーブルと、外部導体の構成が異なる従来型のセミリジッド同軸ケーブルとの電気特性を比較して試験した。なお試験方法は、上記同軸ケーブルをベクトル・ネットワーク・アナライザのport１およびport２に接続し、セミリジッド同軸ケーブルの外部導体材質、絶縁体材質の違いによる挿入損失特性試験（図６）、およびセミリジッド同軸ケーブルの絶縁体材質の違いによる温度変化に伴う位相変動試験（図７）を行ったものである。
第６図の結果から、本発明実施例１のセミリジッド同軸ケーブルは第二外部導体３ｂにアルミ材を使用し同軸ケーブルの軽量化を図ったが、比較例２の外部導体に銅材を用いたタイプと同等以上の優れた特性が得られたことが分かる。また外部導体にアルミ材を使用した比較例３のセミリジッド同軸ケーブルと比較すると、実施例１のセミリジッド同軸ケーブルは約0.5dB／m（at65GHz）低減衰であることが分かる。また第７図の結果から、本発明実施例１のセミリジッド同軸ケーブルは比較例２のセミリジッド同軸ケーブルとほぼ同等の安定した好特性が得られたことが分かる。一方、絶縁体材質がPTFEの充実体である比較例１は、温度変化に対する絶縁体の体積変動が大きく、温度変化に伴う位相変動が非常に大きいことが分かる。
―Characteristic test―
The electrical characteristics of the high performance semi-rigid coaxial cable according to the embodiment of the present invention were compared with those of a conventional semi-rigid coaxial cable having a different external conductor configuration and tested. The test method consists of connecting the coaxial cable to the port 1 and port 2 of the vector network analyzer, inserting loss characteristics test (Fig. 6) due to differences in the outer conductor material and insulator material of the semi-rigid coaxial cable, and the semi-rigid coaxial cable. The phase fluctuation test (FIG. 7) accompanying the temperature change due to the difference in the insulator material was performed.
From the results of FIG. 6, the semi-rigid coaxial cable of Example 1 of the present invention used an aluminum material for the second outer conductor 3b to reduce the weight of the coaxial cable, but a copper material was used for the outer conductor of Comparative Example 2. It can be seen that excellent characteristics equivalent to or better than the type were obtained. Further, it can be seen that the semi-rigid coaxial cable of Example 1 has a low attenuation of about 0.5 dB / m (at 65 GHz) as compared with the semi-rigid coaxial cable of Comparative Example 3 in which an aluminum material is used for the outer conductor. From the results of FIG. 7, it can be seen that the semi-rigid coaxial cable of Example 1 of the present invention obtained stable good characteristics substantially equivalent to the semi-rigid coaxial cable of Comparative Example 2. On the other hand, it can be seen that Comparative Example 1 in which the insulator material is PTFE has a large volume fluctuation of the insulator with respect to the temperature change, and the phase fluctuation accompanying the temperature change is very large.
本発明による高性能セミリジッド同軸ケーブルにおいては、絶縁体として温度特性に優れた多孔質未焼結ＰＴＦＥ樹脂を用い、その上に金属箔の螺旋巻きからなる第一外部導体を設けているので温度変化に伴う電気特性の変動が小さくなり、また絶縁体上に直接アルミやステンレスパイプなどを被せた場合よりも格段に挿入損失特性が向上する。その結果、セミリジッド同軸ケーブルの適用周波数が広帯域化でき、数十GHz，例えば65GHzを越える高周波帯域まで良好な伝送特性が得られる。また高周波機器類の小型化や軽量化に好適となり、高温から極低温までの使用環境にも適合できる。この際、第二外部導体は電気特性に影響しないので、用途により第二外部導体にあらゆる金属が対応可能になり、ケーブルに新たな付加価値を持たせることが出来る。
また本発明による同軸ケーブルアセンブリにおいても、上記セミリジッド同軸ケーブルと同様、数十GHz，例えば65GHzを越える高周波帯域まで良好な伝送特性が得られる。また高周波機器類の小型化や軽量化等に好適となり、高温から極低温までの使用環境に適合できる。
In the high-performance semi-rigid coaxial cable according to the present invention, a porous unsintered PTFE resin excellent in temperature characteristics is used as an insulator, and a first outer conductor made of a spiral winding of a metal foil is provided on the porous unsintered PTFE resin. As a result, the variation in electrical characteristics is reduced, and the insertion loss characteristics are significantly improved as compared with the case where an aluminum or stainless steel pipe is directly covered on the insulator. As a result, the applicable frequency of the semi-rigid coaxial cable can be widened, and good transmission characteristics can be obtained up to a high frequency band exceeding several tens of GHz, for example, 65 GHz. In addition, it is suitable for miniaturization and weight reduction of high-frequency devices, and can be adapted to use environments from high temperatures to extremely low temperatures. At this time, since the second outer conductor does not affect the electrical characteristics, any metal can be used for the second outer conductor depending on the application, and a new added value can be given to the cable.
Also in the coaxial cable assembly according to the present invention, as in the semi-rigid coaxial cable, good transmission characteristics can be obtained up to a high frequency band exceeding several tens of GHz, for example, 65 GHz. In addition, it is suitable for reducing the size and weight of high-frequency devices, and can be adapted to the use environment from high temperature to very low temperature.
１ １中心導体
２ 絶縁体（多孔質未焼結PTFE樹脂）
３ 外部導体
３ａ 第一外部導体（金属箔外部導体）
３ｂ 第二外部導体（金属パイプ外部導体）
４ 絶縁シース
１０a、１０b、１０c 本発明の高性能セミリジッド同軸ケーブル
１０’a、１０’b、１０’c 比較例のセミリジッド同軸ケーブル
１０t 接続先端部（段差・螺旋状凹凸加工接続先端部）（段差加工接続先端部）
１１ 金属製シェル
１１ａ シェル装着ケーブル体
１２ 金属製クランプ
１３ ケーブル保護パイプ部
１４ テーパー部
１５ カップリングナット
１６ ガスケット
１７ リティニングリング
２３ａ、２３ｂ 熱収縮チューブ
３０ 高性能セミリジッド同軸ケーブルアセンブリ（中心コンタクト繋ぎ替えプラグタイプの同軸型コネクタアセンブリ）
３１ 中心コンタクト繋ぎ替え部を備えたプラグコネクタ本体
３２ 中心コンタクト繋ぎ替え部
４０ 高性能セミリジッド同軸ケーブルアセンブリ（ジャックタイプの同軸型コネクタアセンブリ）
４１ ジャックタイプ変換部を備えたジャックコネクタ本体
４２ ジャックタイプ変換部
５０ 高性能セミリジッド同軸ケーブルアセンブリ（中心コンタクト繋ぎ替えプラグタイプの同軸型コネクタアセンブリ）
５１ 中心コンタクト繋ぎ替え部を備えたプラグコネクタ本体
５２ 中心コンタクト繋ぎ替え部
f フランジ
g 外部導体先端面
h 中心導体嵌合部
i 相手側中心コンタクト嵌合部
j ねじ山部
k 中心コンタクトピン
r 螺旋状凹凸加工面
r’ 螺旋状凹凸加工
s 接着剤
t 突起
1 1 Center conductor 2 Insulator (Porous unsintered PTFE resin)
3 outer conductor 3a first outer conductor (metal foil outer conductor)
3b Second outer conductor (metal pipe outer conductor)
4 Insulating sheath 10a, 10b, 10c High-performance semi-rigid coaxial cable 10'a, 10'b, 10'c of the present invention Semi-rigid coaxial cable of comparative example 10t Connection tip (step / spiral uneven processing connection tip) (step Processing connection tip)
DESCRIPTION OF SYMBOLS 11 Metal shell 11a Shell installation cable body 12 Metal clamp 13 Cable protection pipe part 14 Taper part 15 Coupling nut 16 Gasket 17 Retaining ring 23a, 23b Heat-shrinkable tube 30 High performance semi-rigid coaxial cable assembly (center contact switching plug) Type coaxial connector assembly)
31 Plug connector body with central contact switching part 32 Central contact switching part 40 High performance semi-rigid coaxial cable assembly (jack type coaxial connector assembly)
41 Jack connector body with jack type conversion section 42 Jack type conversion section 50 High performance semi-rigid coaxial cable assembly (coaxial connector assembly with central contact switching plug type)
51 Plug connector body provided with a central contact switching part 52 Central contact switching part
f Flange
g Outer conductor tip
h Center conductor fitting part
i Mating center contact fitting part
j Thread
k Center contact pin
r Spiral uneven surface
r 'Spiral uneven processing
s adhesive
t Protrusion
Claims (9)
前記絶縁体は、多孔質の未焼結ポリテトラフルオロエチレン樹脂の押し出し被覆からなり、また外部導体は、先ず絶縁体の外周に良導電性の金属箔を螺旋巻きした第一の外部導体（金属箔外部導体）と、次いでその外側に金属製パイプを被せダイス引きにより該パイプを第一の外部導体に密着させた第二の外部導体（金属パイプ外部導体）の二層の外部導体からなることを特徴とする高性能セミリジッド同軸ケーブル。 A semi-rigid coaxial cable comprising a center conductor, an insulator coated on the outside of the center conductor, and an outer conductor formed on the outside of the insulator,
The insulator is made of an extruded coating of porous unsintered polytetrafluoroethylene resin, and the outer conductor is first a first outer conductor (metal) spirally wound with a highly conductive metal foil around the outer periphery of the insulator. Foil outer conductor), and then a two-layer outer conductor comprising a metal pipe on the outside and a second outer conductor (metal pipe outer conductor) in which the pipe is brought into close contact with the first outer conductor by die drawing. High performance semi-rigid coaxial cable featuring
幅W＝1.2×ｌｎ(X)＋1.6 （許容値±50%） −−(1)
厚さＴ＝0.013×ｌｎ(X)＋0.02（許容値±50%） −−(2)
但し、0.5＜X＜4.5 When the outer diameter of the insulator is X (mm), the width W (mm) and the thickness T (mm) as the highly conductive metal foil of the first outer conductor are the following formulas (1) and (2) A tape-shaped metal foil satisfying the above conditions is used, and the overlap of the tape-shaped metal foil when spirally wound is 27-48% of the width of the metal foil and is uniformly wound with a constant winding tension. The high-performance semi-rigid coaxial cable according to claim 1.
Width W = 1.2 x l n (X) + 1.6 (allowable value ± 50%)--(1)
Thickness T = 0.01 3 × l n (X) +0.02 (allowable value ± 50%) −− (2)
However, 0.5 <X <4.5
前記セミリジッド同軸ケーブルのコネクタ接続先端部は、中心導体、第二の外部導体（第一の外部導体および絶縁体とは面一（それぞれの端面が同一面））が所定長、順次露出するよう段差加工され、また第二外部導体の外周表面は螺旋状凹凸加工が施されて段差・螺旋状凹凸加工接続先端部とされ、また第一外部導体と第二外部導体からなる外部導体の先端面付近を除いた螺旋状凹凸加工外周表面に接着剤が塗布され、先端部が内側に向かって延設されたフランジを有し且つ内面に螺旋状凹凸加工が施された金属製シェルの該フランジ内壁に、前記段差・螺旋状凹凸加工接続先端部の外部導体先端面が突き当たり圧着されるまで回転挿入され、フランジ内壁と該先端面の突き当たり圧着部を電気的接続部とし、前記塗布された接着剤が硬化され、段差・螺旋状凹凸加工接続先端部および金属製シェルが機械的に固着され、電気的に接続されたシェル装着ケーブル体とし、これを同軸型コネクタ本体に装着した事を特徴とする高性能セミリジッド同軸ケーブルアセンブリ。 A semi-rigid coaxial cable assembly having a structure in which the high-performance semi-rigid coaxial cable according to claim 1, 2, 3, or 4 and 5 is connected to a coaxial connector,
The connector connecting tip of the semi-rigid coaxial cable is stepped so that the center conductor and the second outer conductor (the first outer conductor and the insulator are flush with each other (the same end face)) are successively exposed for a predetermined length. It is processed and the distal end surface of the second outer peripheral surface of the outer conductor is a is subjected spiral roughened stepped-helical roughened connection tip, the outer conductor consisting of the first outer conductor and the second outer conductor was or adhesive helically roughened outer peripheral table surface excluding the vicinity is applied, tip the flange of the metallic shell with a helical roughened it is subjected to and the inner face has a flange which extends inwardly Rotated and inserted into the inner wall until the outer conductor tip surface of the step / spiral concavo-convex machining connection tip is abutted and crimped, the flange inner wall and the abutting crimp portion of the tip surface as an electrical connection, and the applied adhesion Agent is cured This is a high-performance, characterized in that the step / spiral uneven connection tip and the metal shell are mechanically fixed and electrically connected to the shell-attached cable body, which is attached to the coaxial connector body. Semi-rigid coaxial cable assembly.
前記セミリジッド同軸ケーブルのコネクタ接続先端部は、中心導体、第二の外部導体（第一の外部導体および絶縁体とは面一（それぞれの端面が同一面））が所定長、順次露出するよう段差加工され、また第二外部導体の外周表面は未加工のままで段差加工接続先端部とされ、また第一外部導体と第二外部導体からなる外部導体の先端面付近を除いた第二外部導体の外周表面に接着剤が塗布され、先端部が内側に向かって延設されたフランジを有し且つ内面に突起を備え、好ましくはフランジに向かって先細りとなるテーパー付きの穴を有する金属製シェルの該フランジ内壁に、前記段差加工接続先端部の外部導体先端面が突き当たるまで圧入され、フランジ内壁と該先端面の突き当たり圧着部を電気的接続部とし、前記塗布された接着剤が硬化され、段差加工接続先端部および金属製シェルが機械的に固着され、電気的に接続されたシェル装着ケーブル体とし、これを同軸型コネクタ本体に装着した事を特徴とする高性能セミリジッド同軸ケーブルアセンブリ。 A semi-rigid coaxial cable assembly having a structure in which the high-performance semi-rigid coaxial cable according to claim 1, 2, 3, or 4 and 5 is connected to a coaxial connector,
The connector connecting tip of the semi-rigid coaxial cable is stepped so that the center conductor and the second outer conductor (the first outer conductor and the insulator are flush with each other (the same end face)) are successively exposed for a predetermined length. It is processed and the second outer peripheral surface of the outer conductor is a step processing connection tip remains unprocessed, the second external, except for the vicinity of the front end surface of the outer conductor consisting of the first outer conductor and the second outer conductor was or is adhesive coated on the outer peripheral table surface of the conductor, with a and projections on the inner surface has a flange tip is extended inward the metal preferably having a hole with a taper tapers toward the flange The flange inner wall of the shell is press-fitted until the front end surface of the outer conductor of the step processed connection tip abuts, the crimping portion of the inner wall of the flange and the front end surface is an electrical connection portion, and the applied adhesive is High-performance semi-rigid coaxial cable, characterized in that a step mounting connection tip and a metal shell are mechanically fixed and electrically connected to a shell mounting cable body, which is mounted on a coaxial connector body assembly.
前記セミリジッド同軸ケーブルのコネクタ接続先端部は、中心導体、第二の外部導体（第一の外部導体および絶縁体とは面一（それぞれの端面が同一面））が順次露出するよう段差加工され、また第二の外部導体の外周表面は螺旋状凹凸加工が施されて段差・螺旋状凹凸加工接続先端部とされ、また第一外部導体と第二外部導体からなる外部導体の先端面付近を除いた第二外部導体の外周表面に接着剤が塗布され、フランジを有しない筒状の内面に螺旋状凹凸加工が施された金属製シェルの該シェル先端面よりも第二外部導体の先端面が若干突き出る状態まで回転挿入され、塗布された接着剤が硬化され、前記段差加工接続先端部および金属製シェルが機械的に固着され、シェル装着ケーブル体とし、これを同軸型コネクタ本体に装着した事を特徴とする高性能セミリジッド同軸ケーブルアセンブリ。 The semi-rigid coaxial cable connector connection tip is stepped so that the central conductor and the second outer conductor (the first outer conductor and the insulator are flush with each other (the end faces are the same)) are sequentially exposed. Also, the outer peripheral surface of the second outer conductor is subjected to a spiral concavo-convex process to form a stepped / spiral concavo-convex connecting tip, except for the vicinity of the tip of the outer conductor composed of the first outer conductor and the second outer conductor. The outer peripheral surface of the second outer conductor is coated with an adhesive, and the tip surface of the second outer conductor is more than the shell tip surface of the metal shell having a cylindrical inner surface that is not provided with a flange and is subjected to spiral concavo-convex processing. Inserted into a slightly protruding state, the applied adhesive was cured, the stepped connection tip and the metal shell were mechanically secured to form a shell-attached cable body, and this was attached to the coaxial connector body High-performance semi-rigid coaxial cable assembly according to claim.
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| JP5935701B2 (en) * | 2013-01-22 | 2016-06-15 | 日立金属株式会社 | Connection method of differential signal transmission cable to circuit board |
| CN113000617A (en) * | 2021-01-25 | 2021-06-22 | 四川东钢新材料股份有限公司 | Cable cladding layer thickness design method and aluminum-clad steel wire aluminum layer thickness design method |
| CN115642002B (en) * | 2022-11-14 | 2023-09-19 | 江苏云舟通信科技有限公司 | High-strength semi-rigid cable and processing technology thereof |
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