JP2692643B2 - Mobile communication system for dead areas using superconducting cable - Google Patents
Mobile communication system for dead areas using superconducting cableInfo
- Publication number
- JP2692643B2 JP2692643B2 JP7092219A JP9221995A JP2692643B2 JP 2692643 B2 JP2692643 B2 JP 2692643B2 JP 7092219 A JP7092219 A JP 7092219A JP 9221995 A JP9221995 A JP 9221995A JP 2692643 B2 JP2692643 B2 JP 2692643B2
- Authority
- JP
- Japan
- Prior art keywords
- conductor
- inner conductor
- outer conductor
- mobile communication
- communication system
- 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.)
- Expired - Lifetime
Links
- 238000010295 mobile communication Methods 0.000 title claims description 15
- 239000004020 conductor Substances 0.000 claims description 48
- 239000003507 refrigerant Substances 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 17
- 239000002887 superconductor Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 18
- 239000000463 material Substances 0.000 description 18
- 230000003287 optical effect Effects 0.000 description 15
- 230000000694 effects Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000003321 amplification Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 5
- 238000003199 nucleic acid amplification method Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Description
【０００１】[0001]
【産業上の利用分野】本発明は移動通信システムに関
し、特に移動通信システムの不感地対策に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system, and more particularly, to a dead zone countermeasure for the mobile communication system.
【０００２】[0002]
【従来の技術】従来、この種の移動通信システムの不感
地対策は、光ケーブルを利用し、伝搬ロスを低減するこ
とを目的として行われている。2. Description of the Related Art Conventionally, measures against dead areas in this type of mobile communication system have been carried out for the purpose of reducing propagation loss by using an optical cable.
【０００３】図３は、従来の光ケーブルを用いた不感地
対策の一例を示す移動通信システムの構成図である。親
基地局１には、回線網により交換局と接続された伝送装
置２と送受信装置３と増幅装置４が収納され、増幅装置
４には空中線５1が接続されている。送受信装置３より
増幅器１５1を介して接続された光・電気変換装置（Ｅ
／Ｏ）１６1は、光ケーブル１７によって、子基地局１
８に収納された光・電気変換装置１６2に連結されてい
る。子基地局１８には増幅器１５2を介して不感地対策
用の空中線５2が接続されている。FIG. 3 is a block diagram of a mobile communication system showing an example of conventional measures against dead areas using an optical cable. The parent base station 1 accommodates a transmission device 2, a transmission / reception device 3, and an amplification device 4 which are connected to a switching center by a circuit network, and the amplification device 4 is connected to an antenna 5 1 . An optical / electrical converter (E) connected to the transmitter / receiver 3 via an amplifier 15 1.
/ O) 16 1 is connected to the child base station 1 by the optical cable 17.
8 is connected to the optical / electrical converter 16 2 . The slave base station 18 is connected to an antenna 5 2 for dead zone countermeasures via an amplifier 15 2 .
【０００４】この従来の移動通信システムは次のように
動作する。伝送装置２によって回線網より受信した制御
および通話回線データは、送受信装置３により変調さ
れ、増幅装置４を介してセル構成に配置された空中線５
1によって端末８1へ送信される。また、空中線５1によ
って端末８1より受信した制御および通話データは、増
幅装置４で増幅された後、送受信装置３によって復調さ
れ、伝送装置２を介して回線網上に送出される。This conventional mobile communication system operates as follows. The control and communication line data received from the line network by the transmission device 2 is modulated by the transmission / reception device 3 and is transmitted via the amplification device 4 to the antenna 5 arranged in a cell configuration.
1 is sent to the terminal 8 1 . The control and call data received from the terminal 81 by the antenna 5 1 is amplified by amplifier 4, demodulated by the transceiver unit 3, it is sent over the network via the transmission device 2.
【０００５】一方、親基地局１と不感地に配置された子
基地局１８との間の信号の送受は、増幅器１５1、１
５2、光・電気変換装置１６1、１６2、光ケーブル１７
によって、電気信号を光信号に変換し、さらに光信号を
電気に変換して行われる。子基地局１８とその周辺の端
末８2との間の通信は不感地の空中線５2を介して行われ
る。On the other hand, transmission / reception of signals between the parent base station 1 and the child base station 18 arranged in a dead zone is carried out by amplifiers 15 1 and 1 1.
5 2 , optical / electrical conversion device 16 1 , 16 2 , optical cable 17
By converting the electric signal into an optical signal and further converting the optical signal into electricity. Communication between the child base station 18 and the peripheral terminal 8 2 is performed via the aerial line 5 2 in the dead zone.
【０００６】また、従来の移動通信システムの他の例と
して、移動体と統制装置とが、その移動体の軌道に沿っ
て布設された漏洩ケーブルを介して無線通信する無線通
信装置が、特開平０１−１３０６３７号公報に記載され
ている。以下、この装置を公報記載の装置と記す。この
装置の特徴は、漏洩ケーブルが、内部導体とその外側に
設けられた超電導体の外被から成り、移動体に搭載され
た外部制御装置が超電導物質層を超電導状態および常電
導状態のいずれかに切り換え制御する点にある。図４
は、公報記載の装置のシステム構成図である。参照番号
１９は車両などの移動体を表し、この移動体１９は軌道
２０上を通る。複数の地上装置２１および超電導材料に
て表面被覆された漏洩ケーブル２５が軌道２０に沿って
布設され、それぞれの漏洩ケーブル２５は各地上装置２
１に接続されている。統制装置２２は伝送回線２３に接
続されている。As another example of the conventional mobile communication system, there is a wireless communication device in which a moving body and a control device wirelessly communicate with each other via a leakage cable laid along the orbit of the moving body. No. 01-130637. Hereinafter, this device will be referred to as the device described in the publication. The feature of this device is that the leaky cable consists of an inner conductor and a jacket of a superconductor provided outside the inner conductor, and an external control device mounted on the moving body makes the superconducting material layer in either a superconducting state or a normal conducting state. The point is to control switching. FIG.
FIG. 1 is a system configuration diagram of the device described in the publication. Reference numeral 19 represents a moving body such as a vehicle, and the moving body 19 passes on a track 20. A plurality of ground devices 21 and a leaky cable 25 whose surface is coated with a superconducting material are laid along the track 20, and each leaky cable 25 is connected to each ground device 2.
1 connected. The control device 22 is connected to the transmission line 23.
【０００７】次に、この漏洩ケーブルを用いたシステム
の動作を説明する。軌道２０に沿って運行する移動体１
９は外部制御装置２４を有し、この外部制御装置は、超
電導材料を超電導状態から常電導状態に遷移させる。外
部制御装置２４は移動体１９が漏洩ケーブル２５に近づ
くに従って、超電導材料を超電導状態から常電導状態に
遷移させる。このため、超電導材料は単なる絶縁物とし
て作用し、移動体１９と漏洩ケーブル２５との間で信号
電波の送受が行われる。移動体１９が漏洩ケーブル２５
から遠ざかると、超電導材料は超電導状態となる。その
結果、超電導材料は、マイスナー効果によって内部導体
をシールドをし、信号電波の送受を抑制する。このよう
にして、移動体１９の通過点に近い地上装置を介して、
移動体１９と統制装置２２との間で、データの交換が行
われる。Next, the operation of the system using this leaky cable will be described. Mobile 1 operating along track 20
9 has an external control device 24, which makes the superconducting material transition from the superconducting state to the normal conducting state. The external control device 24 causes the superconducting material to transition from the superconducting state to the normal conducting state as the moving body 19 approaches the leakage cable 25. Therefore, the superconducting material acts as a mere insulator, and signal radio waves are transmitted and received between the moving body 19 and the leakage cable 25. The moving body 19 is a leaky cable 25.
When it is moved away from the superconducting material, the superconducting material becomes superconducting. As a result, the superconducting material shields the inner conductor by the Meissner effect and suppresses transmission and reception of signal radio waves. In this way, via the ground device near the passing point of the moving body 19,
Data is exchanged between the mobile unit 19 and the control device 22.
【０００８】[0008]
【発明が解決しようとする課題】前掲の従来の光ケーブ
ルを用いた不感地対策は、光・電気変換装置と光・電気
変換装置専用の増幅器が必要であるため、親基地局が大
きくなるばかりではなく、その受け側の子基地局を設置
する必要がある。そのため、基地局建設コスト、ランニ
ングコストが高価になるという問題点がある。The above-mentioned conventional measures against dead zones using the optical cable require an optical / electrical conversion device and an amplifier dedicated to the optical / electrical conversion device, so that the parent base station is not only large in size. No, it is necessary to install a child base station on the receiving side. Therefore, there is a problem that base station construction cost and running cost are high.
【０００９】また、従来の公報記載の超電導を用いた移
動通信システムは、移動体が運行する軌道をあらかじめ
予測し、そこに超電導材料にて表面被覆した漏洩ケーブ
ルを布設することを基本としているため、設置自由度が
少ないという問題点がある。さらに、このシステムは、
超電導体の電気抵抗ゼロという性質を利用するのではな
く、マイスナー効果によるシールド作用を利用するのみ
であるため、長距離伝送という目的とは離れているとい
う問題点がある。Further, the conventional mobile communication system using superconductivity described in the publication is based on predicting the trajectory of the moving body in advance and installing a leaky cable whose surface is coated with a superconducting material. However, there is a problem that the installation flexibility is low. In addition, this system
There is a problem that it is far from the purpose of long-distance transmission because it does not use the property of the superconductor having zero electric resistance but only uses the shield effect by the Meissner effect.
【００１０】本発明の目的は、不感地対策によるサービ
スエリアの拡大、通話品質の向上、及び基地局建設コス
ト、ランニングコストを削減することにある。An object of the present invention is to expand the service area by improving the dead area, improve the call quality, and reduce the base station construction cost and running cost.
【００１１】[0011]
【課題を解決するための手段】本発明の不感地用移動通
信システムは、基地局と、不感地用の空中線と、超電導
ケーブル手段と、冷却手段を備えている。超電導ケーブ
ル手段は、不感地用の空中線と基地局の増幅器との間に
接続され、臨界温度以下の温度で超電導性をもつ内部導
体と、前記内部導体の外側に該内部導体と同軸に配置さ
れ、臨界温度以下の温度で超電導性をもつ外部導体を有
し、内部導体と外部導体が同軸ケーブルを構成してい
る。冷却手段は、超電導ケーブル手段の内部導体と外部
導体とを臨界温度以下の温度に冷却する。A mobile communication system for a dead zone of the present invention comprises a base station, an antenna for a dead zone, a superconducting cable means, and a cooling means. The superconducting cable means is connected between the antenna for a dead zone and the amplifier of the base station, and has an inner conductor having superconductivity at a temperature equal to or lower than a critical temperature, and is arranged coaxially with the inner conductor outside the inner conductor. The outer conductor has superconductivity at a temperature below the critical temperature, and the inner conductor and the outer conductor form a coaxial cable. The cooling means cools the inner conductor and the outer conductor of the superconducting cable means to a temperature below the critical temperature.
【００１２】冷却手段は、内部導体と外部導体とを冷却
する冷媒を循環させる冷却装置を有し、超電導ケーブル
手段は、内部導体と外部導体との間、および外部導体の
外側に同軸状に形成された冷媒の循環路を有する。The cooling means has a cooling device for circulating a cooling medium for cooling the inner conductor and the outer conductor, and the superconducting cable means is formed coaxially between the inner conductor and the outer conductor and outside the outer conductor. And a circulation path for the generated refrigerant.
【００１３】超電導ケーブル手段は外部導体の外側にあ
る冷媒の循環路の更に外側に内部導体に同軸に配置され
た超電導材料でなるシールド層を有する。[0013] Superconducting cable means that having a shielding layer made of a further superconducting material arranged coaxially to the inner conductor to the outside of the circulation path of the refrigerant on the outside of the outer conductor.
【００１４】[0014]
【作用】基地局と不感地用の空中線との間に接続された
超電導ケーブルを臨界温度以下に保つことにより、超電
導の電気抵抗ゼロという性質を利用し、電気信号のまま
無損失の伝送をすることができる。それによって、従来
の技術で行われているように、光・電気変換の必要がな
くなり、光・電気変換に要する装置を削減することがで
きる。[Operation] By keeping the superconducting cable connected between the base station and the aerial line for dead zones at a critical temperature or lower, the property of superconducting electric resistance of zero is used to transmit lossless electric signals. be able to. As a result, there is no need for optical-electrical conversion as in the conventional technique, and the number of devices required for optical-electrical conversion can be reduced.
【００１５】内部導体と外部導体との間、および外部導
体の外側に同軸状の冷媒の循環路を設けることにより、
冷媒の消耗を少なくして、効果的に超電導ケーブル手段
を冷却することができる。By providing a coaxial refrigerant circulation path between the inner conductor and the outer conductor and outside the outer conductor,
The consumption of the refrigerant can be reduced and the superconducting cable means can be cooled effectively.
【００１６】シールド層を設けたことにより、マイスナ
ー効果によるシールド作用によって、外部への電波漏洩
を防止することができる。By providing the shield layer, it is possible to prevent the electric wave from leaking to the outside due to the shield function by the Meissner effect.
【００１７】[0017]
【実施例】次に、本発明の実施例を図面を参照して説明
する。Next, an embodiment of the present invention will be described with reference to the drawings.
【００１８】図１は、本発明の一実施例を示すシステム
構成図である。回線網により交換局と接続された伝送装
置２、送受信装置３、増幅装置４は親基地局１に収納さ
れ、空中線５1が設けられている。増幅装置４には、冷
却装置６にて冷却された超電導同軸ケーブル７を介し
て、不感地対策用の空中線５2が接続されている。FIG. 1 is a system configuration diagram showing an embodiment of the present invention. The transmission device 2, the transmission / reception device 3, and the amplification device 4, which are connected to the exchange through the line network, are housed in the parent base station 1 and provided with the antenna 5 1 . The amplifying device 4 is connected with an aerial line 5 2 for dead zone countermeasures via a superconducting coaxial cable 7 cooled by a cooling device 6.
【００１９】次に、動作を説明する。伝送装置２にて回
線網から受信された制御および通話回線データは、図３
の装置と同様に送受信装置３により変調され、増幅装置
４を介してセル構成に配置された空中線５1によって端
末８1へ送信される。増幅装置４を介して空中線５1によ
って端末８1から受信された制御および通話データは、
送受信装置３により復調され、伝送装置２によって回線
網状に送信される。不感地に設置された空中線５2と増
幅装置４との間の通信は超電導同軸ケーブル７によっ
て、電気信号のまま無損失で行われる。このようにし
て、親基地局１と、空中線５2の周辺にある端末８2との
間の通信が行われる。Next, the operation will be described. The control and call line data received from the line network by the transmission device 2 is shown in FIG.
Similar to the above device, it is modulated by the transmitting / receiving device 3 and transmitted to the terminal 8 1 via the amplifying device 4 by the antenna 5 1 arranged in the cell configuration. The control and call data received from the terminal 8 1 by the antenna 5 1 via the amplifier 4 are:
The signal is demodulated by the transmission / reception device 3 and transmitted by the transmission device 2 in a network form. Communication between the antenna 5 2 installed in the dead zone and the amplifying device 4 is performed by the superconducting coaxial cable 7 without loss as an electric signal. In this way, communication is performed between the parent base station 1 and the terminal 8 2 around the antenna 5 2 .
【００２０】図２は、本発明の超電導同軸ケーブルの一
実施例を示す断面図である。超電導材料を用いた内部導
体１４の外側には液体ヘリウム、液体窒素などの冷媒が
流れる冷媒層１３、及び冷媒層１１がある。内部導体１
４の外側に冷媒層１３、１１にて挟み込まれた外部導体
１２が内部導体１４に同軸に設けられていて、さらに全
体を包み込むように冷却層１０、シールド層２６、及び
断熱層９が内部導体１４に同軸に設けられている。外部
導体１２もまた超電導材料より構成されている。内部導
体１４の外側の冷媒層１３には、超電導同軸ケーブル７
側から冷却装置６へ上る冷媒が流れ、外部導体１２の外
側の冷媒層１１には、冷却装置６から超電導同軸ケーブ
ル側へ下がる冷媒が流れる。それによって、冷媒が半永
久的に循環し、必要な冷媒のみで冷却が可能な構成とな
っている。シールド層２６も超電導材料で出来ており、
この層に生ずるマイスナー効果によって、外部への電波
漏洩が防止される。FIG. 2 is a sectional view showing an embodiment of the superconducting coaxial cable of the present invention. Outside the inner conductor 14 made of a superconducting material, there are a refrigerant layer 13 and a refrigerant layer 11 in which a refrigerant such as liquid helium or liquid nitrogen flows. Inner conductor 1
4, an outer conductor 12 sandwiched between refrigerant layers 13 and 11 is provided coaxially with an inner conductor 14, and a cooling layer 10, a shield layer 26, and a heat insulating layer 9 are provided so as to wrap the whole inside. 14 is provided coaxially. The outer conductor 12 is also made of a superconducting material. The refrigerant layer 13 outside the inner conductor 14 has a superconducting coaxial cable 7
The refrigerant flowing from the side to the cooling device 6 flows, and the refrigerant flowing from the cooling device 6 to the superconducting coaxial cable side flows in the refrigerant layer 11 outside the outer conductor 12. As a result, the refrigerant circulates semipermanently and can be cooled with only the necessary refrigerant. The shield layer 26 is also made of a superconducting material,
Due to the Meissner effect generated in this layer, electric wave leakage to the outside is prevented.
【００２１】[0021]
【発明の効果】以上説明したように、本発明の超電導を
用いた移動通信システムは次の効果を有する。 １） 電気抵抗０の同軸ケーブルで不感地をカバーでき
るため、サービスエリアの拡大、通話品質を向上するこ
とができる。 ２） 従来の不感地対策に必要な子基地局を廃止し、光
・電気変換装置を使用しないので、親基地局を小型化す
ることができる。その結果、基地局建設コスト、ランイ
ングコストを大幅に削減できる。 ３） 電気抵抗ゼロの超伝導材料を使用するため、伝送
品質を格段に向上することができる。４）超電導材料でなるシールド層に生ずるマイスナー効
果によって、外部への電波漏洩が防止される。 As described above, the mobile communication system using superconductivity according to the present invention has the following effects. 1) Since a dead zone can be covered with a coaxial cable having an electric resistance of 0, the service area can be expanded and the call quality can be improved. 2) The parent base station can be miniaturized because the child base station required for the conventional measures against dead areas is abolished and no optical-electrical conversion device is used. As a result, base station construction costs and running costs can be significantly reduced. 3) Since the superconducting material having zero electric resistance is used, the transmission quality can be remarkably improved. 4) Meissner effect that occurs in the shield layer made of superconducting material
As a result, electric wave leakage to the outside is prevented.
【図１】本発明の超電導を用いた移動通信システムの一
実施例を示すシステム構成図である。FIG. 1 is a system configuration diagram showing an embodiment of a mobile communication system using superconductivity of the present invention.
【図２】本発明の超電導同軸ケーブルの一実施例の断面
を示す図である。FIG. 2 is a view showing a cross section of an embodiment of the superconducting coaxial cable of the present invention.
【図３】光ケーブルを用いて不感地対策を実施している
移動通信システムの従来例の構成図である。[Fig. 3] Fig. 3 is a configuration diagram of a conventional example of a mobile communication system in which a measure against a dead zone is implemented using an optical cable.
【図４】超電導を用いた移動通信システムの従来例を示
す構成図である。FIG. 4 is a configuration diagram showing a conventional example of a mobile communication system using superconductivity.
１ 親基地局 ２ 伝送装置 ３ 送受信装置 ４ 増幅装置 ５1、５2 空中線 ６ 冷却装置 ７ 超電導同軸ケーブル ８1、８2 端末 ９ 断熱層 １０ 冷却層 １１ 冷媒層（外部導体冷却用） １２ 外部導体（超電導材料） １３ 冷媒層（内部導体冷却用） １４ 内部導体（超電導材料） １５ 増幅器 １６ 光・電気変換装置 １７ 光ケーブル １８ 子基地局 １９ 移動体 ２０ 軌道 ２１ 地上装置 ２２ 統制装置 ２３ 伝送装置 ２４ 外部制御装置 ２５ 漏洩ケーブル ２６ シールド層（超電導材料）1 parent base station 2 transmission device 3 transmission / reception device 4 amplification device 5 1 , 5 2 antenna 6 cooling device 7 superconducting coaxial cable 8 1 , 8 2 terminal 9 heat insulation layer 10 cooling layer 11 refrigerant layer (for cooling outer conductor) 12 outer conductor (Superconducting material) 13 Refrigerant layer (for cooling inner conductor) 14 Inner conductor (superconducting material) 15 Amplifier 16 Optical / electrical converter 17 Optical cable 18 Sub-base station 19 Mobile unit 20 Track 21 Ground device 22 Control device 23 Transmission device 24 External Control device 25 Leakage cable 26 Shield layer (superconducting material)
Claims (1)
用の空中線と基地局の増幅器との間に接続され、臨界温
度以下の温度で超電導性をもつ内部導体と、前記内部導
体の外側に該内部導体と同軸に配置され、臨界温度以下
の温度で超電導性をもつ外部導体を有し、内部導体と外
部導体が同軸ケーブルを構成する超電導ケーブル手段
と、前記超電導ケーブル手段の内部導体と外部導体とを
臨界温度以下の温度に冷却する冷却手段とを有し、前記
冷却手段は、前記内部導体と外部導体とを冷却する冷媒
を循環させる冷却装置を有し、前記超電導ケーブル手段
は、内部導体と外部導体との間、および外部導体の外側
に同軸状に形成された冷媒の循環路を有する移動通信シ
ステムにおいて、 前記超電導ケーブル手段は外部導体の外側にある前記冷
媒の循環路の更に外側に内部導体に同軸に配置された超
電導材料でなるシールド層を有することを特徴とする、
移動通信システム。 And 1. A base station, and antenna for dead spots, is connected between the amplifier of the antenna and the base station for the dead spots, and an internal conductor having a superconductive critical temperature below the temperature, the inner conductor Superconducting cable means arranged coaxially with the inner conductor on the outer side of the outer conductor and having an outer conductor having superconductivity at a temperature below a critical temperature, the inner conductor and the outer conductor constituting a coaxial cable
And a cooling means for cooling the inner conductor and the outer conductor of the superconducting cable means to a temperature below a critical temperature ,
The cooling means is a refrigerant that cools the inner conductor and the outer conductor.
A superconducting cable means having a cooling device for circulating
Between the inner and outer conductors and outside the outer conductor
A mobile communication system having a refrigerant circulation path coaxially formed in the
In the stem, the superconducting cable means is located outside the outer conductor.
A superconductor placed coaxially with the inner conductor further outside the medium circulation path.
Characterized by having a shield layer made of a conductive material,
Mobile communication system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7092219A JP2692643B2 (en) | 1995-04-18 | 1995-04-18 | Mobile communication system for dead areas using superconducting cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7092219A JP2692643B2 (en) | 1995-04-18 | 1995-04-18 | Mobile communication system for dead areas using superconducting cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08289351A JPH08289351A (en) | 1996-11-01 |
| JP2692643B2 true JP2692643B2 (en) | 1997-12-17 |
Family
ID=14048342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7092219A Expired - Lifetime JP2692643B2 (en) | 1995-04-18 | 1995-04-18 | Mobile communication system for dead areas using superconducting cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2692643B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4880229B2 (en) * | 2005-01-31 | 2012-02-22 | 株式会社ワイ・ワイ・エル | Superconducting power transmission cable and power transmission system |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62246228A (en) * | 1986-04-18 | 1987-10-27 | Toshiba Corp | Coaxial waveguide structure |
| JPS648701A (en) * | 1987-07-01 | 1989-01-12 | Sharp Kk | Waveguide device |
| JPS6419618A (en) * | 1987-07-15 | 1989-01-23 | Hitachi Ltd | Superconductive bus-bar |
| JPS6450601A (en) * | 1987-08-21 | 1989-02-27 | Toshiba Corp | Superconductive high frequency transmission line |
| JPH01128315A (en) * | 1987-11-12 | 1989-05-22 | Mitsubishi Cable Ind Ltd | Superconductive coaxial cable |
| JP2856738B2 (en) * | 1988-01-13 | 1999-02-10 | 日本原子力研究所 | Coaxial current introduction terminal |
| JPH01300602A (en) * | 1988-05-30 | 1989-12-05 | Japan Atom Energy Res Inst | High frequency waveguide and high frequency coaxial pipe |
| JP3077338B2 (en) * | 1991-12-12 | 2000-08-14 | 日本電気株式会社 | Incoming call control system and telephone system |
| JPH05259958A (en) * | 1992-03-13 | 1993-10-08 | Kokusai Electric Co Ltd | Radio repeater |
| JP2879840B2 (en) * | 1992-11-05 | 1999-04-05 | エヌ・ティ・ティ移動通信網株式会社 | Optical fiber transmission equipment for wireless signals |
| JPH0779105A (en) * | 1993-09-07 | 1995-03-20 | Nec Corp | Coaxial wiring board |
-
1995
- 1995-04-18 JP JP7092219A patent/JP2692643B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08289351A (en) | 1996-11-01 |
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