JPH0795701B2 - Superconducting receiver converter - Google Patents
Superconducting receiver converterInfo
- Publication number
- JPH0795701B2 JPH0795701B2 JP2176716A JP17671690A JPH0795701B2 JP H0795701 B2 JPH0795701 B2 JP H0795701B2 JP 2176716 A JP2176716 A JP 2176716A JP 17671690 A JP17671690 A JP 17671690A JP H0795701 B2 JPH0795701 B2 JP H0795701B2
- Authority
- JP
- Japan
- Prior art keywords
- superconducting
- antenna
- frequency conversion
- conversion element
- local oscillator
- 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 - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/005—Transference of modulation from one carrier to another, e.g. frequency-changing by means of superconductive devices
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Superconductor Devices And Manufacturing Methods Thereof (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Superheterodyne Receivers (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は超伝導応用技術である弱電界受信装置および周
波数変換装置などの超伝導受信変換装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superconducting receiving and converting device such as a weak electric field receiving device and a frequency converting device, which are superconducting applied techniques.
従来の技術 従来、超伝導体としては、鉛（Pb）またはニオブ（Nb）
等の金属超伝導体、窒化ニオブ（NbN）、ニオブ３ゲル
マニウム（Nb3Ge）またはシェブレル（PbMo6.4S8）など
の金属化合物あるいはBPBO（Ba−Pb−Bi−Ｏ）の組成を
持つ金属酸化物に限られていた。Conventional Technology Conventionally, as a superconductor, lead (Pb) or niobium (Nb) has been used.
Etc., metal superconductors, niobium nitride (NbN), niobium 3 germanium (Nb 3 Ge), chevrel (PbMo 6.4 S 8 ) or other metal compounds, or metal oxides having a composition of BPBO (Ba-Pb-Bi-O). It was limited to things.
また最近では、BKBO（Ba−Ｋ−Bi−Ｏ）の金属酸化物も
超伝導体であることが発見された。Recently, it was discovered that a metal oxide of BKBO (Ba-K-Bi-O) is also a superconductor.
これらの超伝導体において、その超伝導遷移温度（以下
Tcと称する）は合金系では最高でもNb3Geの23.6Kであ
り、BPBOやBKBO等の金属酸化物でも30K程度であり、超
伝導装置として動作させるためには冷却材として高価で
取扱いのむずかしい液体ヘリウム（沸点4.2K）を用いな
くてはならなかった。これに対して近年発見されたCuを
含む酸化物超伝導体の中にはTcが100Kを超えるものがあ
り、それら超伝導体は安価で取扱いの容易な液体窒素
（沸点77.3K）で冷却するだけで超伝導状態に遷移す
る。このCuを含む酸化物超伝導体を用いて超伝導装置を
製造すると、冷却材として液体ヘリウムの代わりに安価
な液体窒素で動作可能な超伝導装置が可能となり、応用
範囲が拡大する。In these superconductors, their superconducting transition temperatures (below
Tc) is 23.6K of Nb 3 Ge at maximum in alloy system, and about 30K even in metal oxides such as BPBO and BKBO. It is expensive and difficult to handle as a coolant to operate as a superconducting device. Liquid helium (boiling point 4.2K) had to be used. On the other hand, some recently discovered oxide superconductors containing Cu have a Tc of over 100K, and these superconductors are cooled with liquid nitrogen (boiling point 77.3K) that is cheap and easy to handle. It just transitions to the superconducting state. When a superconducting device is manufactured using this oxide superconductor containing Cu, a superconducting device that can operate with inexpensive liquid nitrogen instead of liquid helium as a coolant becomes possible, and the range of application is expanded.
電波の受信装置としてアンテナおよび検出器が用いられ
るが、従来の超伝導体を用いたものでは、オーム'88/5
誌、40頁（「高温超伝導体の電気通信への応用」猪股秀
行、OHM'88、５、pp.38〜42）にSi基板上にNb超伝導体
を用いて形成したλ/2ダイポールアンテナの出力部に並
列に５段直列ジョセフソン接合を設けて一体化検出器を
構成した例が報告されている。また同文献の39頁には、
Nb空洞を共振器として用いて発振周波数を安定化した発
振器の例が報告されている。さらに高温超伝導体を用い
たものでは、スタブチューニングを施した短ダイポール
アンテナの導体材料にYBa2Cu3Oxを用いることにより銅
を用いたものに比べて感度が増加することがエレクトロ
ニクス・レターズ24巻460〜461頁（“High−Tc Superc
onducting Short Dipole Antenna",S.K.Khamas et
al.,Electronics Letters Vol.24 pp.460〜461,、
1988）に報告されている。Antennas and detectors are used as radio wave receivers, but with conventional superconductors, Ohm '88 / 5
Pp.40 ("Application of high temperature superconductors to telecommunications" Hideyuki Inomata, OHM'88, 5 , pp.38-42), λ / 2 dipole formed by using Nb superconductor on Si substrate. There has been reported an example in which an integrated detector is configured by providing five-stage series Josephson junctions in parallel at the output part of the antenna. Also, on page 39 of the same document,
An example of an oscillator in which the oscillation frequency is stabilized by using an Nb cavity as a resonator has been reported. Furthermore, in the case of using a high-temperature superconductor, the sensitivity is increased by using YBa 2 Cu 3 O x as the conductor material of the short dipole antenna with stub tuning, compared with the one using copper. Volume 24 Pages 460-461 ("High-Tc Superc
onducting Short Dipole Antenna ", SKKhamas et
al., Electronics Letters Vol.24 pp.460 ~ 461 ,,
1988).
発明が解決しようとする課題 従来の超伝導受信変換装置ではアンテナと周波数変換素
子と前置増幅器とを単一基板上に形成した例はない。ま
た単にアンテナと周波数変換素子を一体化した例ではNb
等の超伝導体を用いているため4K程度の低温が必要であ
る。一方前置増幅器には半導体デバイスを用いるので4K
程度の極低温で動作させた時のキャリアの凍結を防止す
るために特殊な構成が必要であり非常に高価なものとな
っていた。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In a conventional superconducting receiver conversion device, there is no example in which an antenna, a frequency conversion element and a preamplifier are formed on a single substrate. In the example where the antenna and frequency conversion element are simply integrated, Nb
A low temperature of about 4K is required because a superconductor such as On the other hand, since a semiconductor device is used for the preamplifier, 4K
A special structure is required to prevent the carrier from freezing when operated at a very low temperature, and it is very expensive.
また前置増幅器の動作温度を例えば液体窒素温度（77.3
K）とすると前置増幅器の制限条件は緩和されるが、周
波数変換素子と前置増幅器とを例えば銅のような常伝導
体で接続しなければならなかった。この接続導体で発生
する熱雑音が受信装置全体のS/N比の劣化をもたらすこ
とになる。In addition, the operating temperature of the preamplifier is set to, for example, the liquid nitrogen temperature (77.3
K) relaxes the limiting condition of the preamplifier, but the frequency conversion element and the preamplifier had to be connected by a normal conductor such as copper. The thermal noise generated in this connecting conductor causes deterioration of the S / N ratio of the entire receiver.
またアンテナ一体化周波数変換素子と前置増幅器とを別
々に構成する場合は受信変換装置の容積が大きくなり、
冷却器の能力に負担がかかり冷却装置が大型化する。ま
た従来の超伝導周波数変換素子を用いて微弱電波を検出
する場合にはヘテロダイン検波が通常よく用いられる
が、局部発振器の発振周波数の安定度が受信変換装置全
体の安定度を決定してしまう。Further, when the antenna integrated frequency conversion element and the preamplifier are separately configured, the volume of the reception conversion device increases,
The capacity of the cooler is burdened and the cooling device becomes large. Although heterodyne detection is often used when detecting weak radio waves using a conventional superconducting frequency conversion element, the stability of the oscillation frequency of the local oscillator determines the stability of the entire reception conversion device.
また従来局部発振器に超伝導空洞共振器を用いて周波数
の安定化を図った例がある。しかし、このような超伝導
空洞共振器を用いた局部発振器はその容積が大きくなり
冷却装置が大型化する。また局部発振器の出力を超伝導
周波数変換素子に結合させる途中で損失が発生し、結合
度のゆらぎ等が発生して過剰雑音を発生することにな
る。In addition, there is an example in which a frequency is stabilized by using a superconducting cavity resonator in a conventional local oscillator. However, the local oscillator using such a superconducting cavity has a large volume and a large cooling device. In addition, a loss occurs during the coupling of the output of the local oscillator to the superconducting frequency conversion element, which causes fluctuations in the degree of coupling and causes excessive noise.
課題を解決するための手段 上記従来の課題を解決するために本発明の超伝導受信変
換装置では、単一基板上に、超伝導薄膜で構成されたア
ンテナと、そのアンテナの出力部に接続されたジョセフ
ソン素子で構成された周波数変換素子と、その周波数変
換素子の出力端に接続された前置増幅器と、結合部を介
してその出力の一部をアンテナに結合させた局部発振器
とを形成した構成を有している。Means for Solving the Problems In order to solve the above-mentioned conventional problems, in the superconducting receiver conversion device of the present invention, on a single substrate, an antenna composed of a superconducting thin film, and connected to the output part of the antenna. A frequency conversion element composed of a Josephson element, a preamplifier connected to the output terminal of the frequency conversion element, and a local oscillator in which a part of the output is coupled to an antenna via a coupling section. It has a configuration.
超伝導薄膜の材料、ジョセフソン素子の材料、局部発振
器の共振器の材料として銅（Cu）を含む酸化物超伝導薄
膜を用いた場合は特に有効である。It is particularly effective when an oxide superconducting thin film containing copper (Cu) is used as the material of the superconducting thin film, the material of the Josephson element, and the material of the resonator of the local oscillator.
作用 この構成によって、超伝導受信変換装置が小型軽量化で
き、微弱電波の検出感度およびS/N比を向上できる。こ
の理由として、第一に超伝導アンテナの極めて低い交流
抵抗に基づく低損失性と周波数変換素子の超伝導現象に
基づく強い非線形性により効率よく周波数変換して信号
検出できること、第二に超伝導アンテナと周波数変換素
子との接続を超伝導体で行ない、かつ信号伝送距離を物
理的に短くすることにより過剰雑音の発生が抑圧される
ことが挙げられる。また前置増幅器の温度がアンテナと
ほぼ等しい温度に保たれるために増幅器の過剰雑音の増
加が抑制される。さらに、超伝導体にCuを含む酸化物超
伝導薄膜を用いた場合には液体窒素温度で動作が可能と
なり、前置増幅器に課せられる制約条件が緩和されて低
コスト化できる。また局部発振器本体のケースが不要と
なり小型化でき、局部発振波のアンテナへの結合が基板
上において安定に実現できるため結合係数のゆらぎによ
る過剰雑音が避けられる。また局部発振器の共振器に超
伝導薄膜を用いた場合は共振器のＱ値を高くすることが
でき、冷却による温度安定性と相まって発振周波数の安
定度が向上する。このように、アンテナ、周波数変換素
子および前置増幅器を単一基板上に集積化することによ
りケースの共用化が可能である。Operation With this configuration, the superconducting receiver conversion device can be made smaller and lighter, and the detection sensitivity and S / N ratio of weak radio waves can be improved. The reason for this is that firstly, it is possible to efficiently perform frequency conversion to detect signals by low loss due to the extremely low AC resistance of the superconducting antenna and strong non-linearity due to the superconducting phenomenon of the frequency conversion element. It is possible to suppress the generation of excess noise by connecting the frequency converter and the frequency converter with a superconductor and physically shortening the signal transmission distance. Further, since the temperature of the preamplifier is maintained at a temperature almost equal to that of the antenna, increase of excess noise of the amplifier is suppressed. Furthermore, when an oxide superconducting thin film containing Cu is used as the superconductor, it can operate at the liquid nitrogen temperature, and the constraints imposed on the preamplifier can be relaxed and the cost can be reduced. Further, since the case of the local oscillator body is not required, it can be miniaturized, and the coupling of the local oscillation wave to the antenna can be stably realized on the substrate, so that the excessive noise due to the fluctuation of the coupling coefficient can be avoided. When a superconducting thin film is used for the resonator of the local oscillator, the Q value of the resonator can be increased, and the stability of the oscillation frequency is improved in combination with the temperature stability due to cooling. In this way, the case can be shared by integrating the antenna, the frequency conversion element, and the preamplifier on a single substrate.
実施例 以下本発明の一実施例について図面を参照しながら説明
する。Embodiment One embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明の超伝導受信変換装置の一実施例の構成
を示す平面図である。FIG. 1 is a plan view showing the configuration of an embodiment of the superconducting receiver / converter of the present invention.
基板１の上に超伝導薄膜からなるアンテナ２、アンテナ
２の出力部３、周波数変換素子４、前置増幅器５、局部
発振器６が形成されている。アンテナ２の出力部３近傍
には周波数変換素子４が接続されており、アンテナ２の
出力部３は超伝導ストリップラインにより前置増幅器５
の入力部にインピーダンス整合されて接続されている。
周波数変換素子４は超伝導薄膜で形成され、一部に細く
短い弱結合部を有する弱結合型ジョセフソン素子、２つ
の超伝導薄膜間を常伝導体で接続した近傍効果型ジョセ
フソン素子または２つの超伝導薄膜間を絶縁体で接続し
たトンネル型ジョセフソン素子から構成される。なおト
ンネル型ジョセフソン素子を用いてSISミキサーとして
動作させる場合には、ジョセフソン電流によるノイズの
ダウンコンバージョンを抑止することが可能となり更に
低雑音化が可能となる。周波数変換素子としてのジョセ
フソン素子は１つでもよいが、ジョセフソン素子のイン
ピーダンスがストリップラインの特性インピーダンスに
比べて極端に小さい場合には直列に２つ以上接続してイ
ンピーダンスマッチングを行なうことにより変換効率が
改善できる。局部発振器６の局部発振波出力は結合部７
において電磁結合によりアンテナ２に給電される。他
方、空間伝播て来た信号波はアンテナ２により受信さ
れ、局部発振波とともに周波数変換素子４に給電され
る。ここで周波数変換素子４が超伝導現象を利用してい
るため高感度であり、極めて微弱な信号波の検出が可能
で必要な局部発振波入力パワーが僅かで済むことから、
アンテナ２と結合部７との結合を両者の干渉が起こらな
い程度に弱く設定しておくことが可能である。したがっ
て局部発振器６の共振器のＱ値を高く設定することがで
きるため、安定した局部発振波出力が得られる。特に局
部発振器の共振器を基板１上に形成した超伝導薄膜を用
いたストリップライン型共振器等とすることにより、超
高周波においても損失が銅等の常伝導金属を用いた場合
に比べて桁違いに小さくでき極めて高いＱ値が実現でき
る。また局部発振器６の出力の結合部７とアンテナ２と
の結合が基板１上で固定されているために安定な結合が
得られる。周波数変換素子４により周波数変換された中
間周波信号波は出力部３のストリップラインにより前置
増幅器５に供給されて増幅された後、前置増幅器５の出
力部８から出力され同軸ケーブルにより次段へ伝送され
る。前置増幅器５や局部発振器６は半導体デバイスを用
いて容易に構成することができるが、前置増幅器５には
超伝導パラメトリック増幅器等を使用することも可能で
あり、局部発振器６にはジョセフソン線路発振器等も使
用することが可能である。前置増幅器５の出力部８のス
トリップラインは銅などの常伝導金属で構成しても良い
が、超伝導薄膜で構成することにより出力信号の減衰が
軽減される。An antenna 2, which is a superconducting thin film, an output section 3 of the antenna 2, a frequency conversion element 4, a preamplifier 5, and a local oscillator 6 are formed on a substrate 1. A frequency conversion element 4 is connected near the output portion 3 of the antenna 2, and the output portion 3 of the antenna 2 is connected to the preamplifier 5 by a superconducting strip line.
Is connected to the input part of the device with impedance matching.
The frequency conversion element 4 is formed of a superconducting thin film, and has a weak coupling type Josephson element having a thin and short weak coupling part, and a proximity effect type Josephson element or 2 in which two superconducting thin films are connected by a normal conductor. It consists of a tunnel-type Josephson device in which two superconducting thin films are connected by an insulator. When a tunnel type Josephson device is used to operate as a SIS mixer, it is possible to suppress noise down-conversion due to Josephson current and further reduce noise. Only one Josephson element may be used as a frequency conversion element, but if the Josephson element has an impedance that is extremely smaller than the characteristic impedance of the strip line, then two or more in series should be connected to perform impedance matching. Efficiency can be improved. The local oscillator wave output of the local oscillator 6 is output to the coupling unit 7.
At 2, the antenna 2 is fed by electromagnetic coupling. On the other hand, the signal wave propagating in space is received by the antenna 2, and is fed to the frequency conversion element 4 together with the local oscillation wave. Since the frequency conversion element 4 uses the superconducting phenomenon, it has high sensitivity, can detect extremely weak signal waves, and requires only a small amount of local oscillation wave input power.
It is possible to set the coupling between the antenna 2 and the coupling portion 7 to be weak enough so that they do not interfere with each other. Therefore, the Q value of the resonator of the local oscillator 6 can be set high, and a stable local oscillation wave output can be obtained. In particular, by forming the resonator of the local oscillator as a stripline resonator using a superconducting thin film formed on the substrate 1, the loss is higher than that in the case of using a normal conducting metal such as copper even at a high frequency. The difference can be made small and an extremely high Q value can be realized. Further, since the coupling between the coupling section 7 for the output of the local oscillator 6 and the antenna 2 is fixed on the substrate 1, stable coupling can be obtained. The intermediate frequency signal wave whose frequency has been converted by the frequency conversion element 4 is supplied to the preamplifier 5 by the stripline of the output section 3 and amplified, and then output from the output section 8 of the preamplifier 5 and output to the next stage by the coaxial cable. Transmitted to. The preamplifier 5 and the local oscillator 6 can be easily configured by using a semiconductor device, but it is also possible to use a superconducting parametric amplifier or the like for the preamplifier 5, and the local oscillator 6 is a Josephson amplifier. A line oscillator or the like can also be used. The stripline of the output section 8 of the preamplifier 5 may be made of a normal conductive metal such as copper, but the use of a superconducting thin film reduces the attenuation of the output signal.
このように一体化された超伝導受信変換装置の電気的入
出力はダウンコンバートされた中間周波信号波と電源の
みとなり、アンテナで受信された受信信号波を直接伝送
するよりも周波数の低くなった分だけ信号波の伝送損失
は少なくなりS/N比の劣化が防止できる。また、周波数
変換素子４にジョセフソン素子を用いることにより、強
い非線形性による大きな変換ゲインが実現でき、また極
微弱信号電波の低雑音化が可能となる。さらにケースの
共用化により小型軽量化、低コスト化できる。また冷却
装置の負荷が軽減でき、冷却装置とそのランニングコス
トを含めたコストパーフォーマンスの向上が可能とな
る。The electrical input and output of the superconducting receiver converter integrated in this way is only the down-converted intermediate frequency signal wave and power supply, and the frequency is lower than that of directly transmitting the received signal wave received by the antenna. As a result, the transmission loss of the signal wave is reduced and deterioration of the S / N ratio can be prevented. Further, by using the Josephson element as the frequency conversion element 4, a large conversion gain due to strong non-linearity can be realized, and the noise of the extremely weak signal radio wave can be reduced. Further, by sharing the case, it is possible to reduce the size, weight and cost. Further, the load on the cooling device can be reduced, and the cost performance including the cooling device and its running cost can be improved.
特に超伝導薄膜として例えばY1Ba2Cu3OyやBi2Sr2Ca2Cu3
OyのようなCuを含む酸化物超伝導体を用いることによ
り、液体窒素温度（77.3K）での動作が可能となる。こ
の場合には前置増幅器５や局部発振器６を半導体デバイ
スで構成することが容易となり、低コスト化できる。ま
た周波数変換素子４として、例えばBi2Sr2Ca2Cu3Oy/Bi2
Sr2Cu1Oy/Bi2Sr2Ca2Cu3Oyの積層構造近接効果型ジョセ
フソン素子等が使用できる。超伝導体と半導体デバイス
等の常伝導金属リード線との接続は、バッファ層として
金や銀等の貴金属薄膜を酸化物超伝導薄膜上に堆積し、
バッファ層とリード線を半田付けすることにより実現で
きる。このことにより酸化物超伝導薄膜と常伝導金属ま
たは半田金属との酸化反応による酸化物超伝導薄膜の劣
化を防止することが可能である。Especially as a superconducting thin film, for example, Y 1 Ba 2 Cu 3 O y or Bi 2 Sr 2 Ca 2 Cu 3
By using an oxide superconductor containing Cu such as O y , it is possible to operate at liquid nitrogen temperature (77.3K). In this case, the preamplifier 5 and the local oscillator 6 can be easily configured by a semiconductor device, and the cost can be reduced. Further, as the frequency conversion element 4, for example, Bi 2 Sr 2 Ca 2 Cu 3 O y / Bi 2
Laminated structure of Sr 2 Cu 1 O y / Bi 2 Sr 2 Ca 2 Cu 3 O y A proximity effect type Josephson device or the like can be used. To connect a superconductor to a normal-conducting metal lead wire such as a semiconductor device, a noble metal thin film such as gold or silver is deposited as a buffer layer on the oxide superconducting thin film,
It can be realized by soldering the buffer layer and the lead wire. This makes it possible to prevent deterioration of the oxide superconducting thin film due to the oxidation reaction between the oxide superconducting thin film and the normal conducting metal or the solder metal.
発明の効果 以上のように本発明は、単一基板上に超伝導薄膜で構成
されたアンテナと、アンテナの出力部に接続されたジョ
セフソン素子で構成された周波数変換素子と、周波数変
換素子の出力端に接続された前置増幅器と、結合部を介
してその出力の一部をアンテナに結合させた局部発振器
とを形成することにより、小型軽量化、低コスト化、安
定化、高感度化および低雑音化できる優れた超伝導受信
変換装置を実現できるものである。EFFECTS OF THE INVENTION As described above, the present invention provides an antenna composed of a superconducting thin film on a single substrate, a frequency conversion element composed of a Josephson element connected to the output part of the antenna, and a frequency conversion element By forming a preamplifier connected to the output end and a local oscillator in which a part of the output is coupled to the antenna through a coupling part, downsizing, weight reduction, cost reduction, stabilization, and high sensitivity are achieved. Further, it is possible to realize an excellent superconducting receiving and converting device which can reduce noise.
第１図は本発明の超伝導受信変換装置の一実施例の構成
を示す平面図である。 １……基板、２……アンテナ、３……アンテナの出力
部、４……周波数変換素子、５……前置増幅器、６……
局部発振器、７……結合部。FIG. 1 is a plan view showing the configuration of an embodiment of the superconducting receiver / converter of the present invention. 1 ... Substrate, 2 ... Antenna, 3 ... Antenna output section, 4 ... Frequency conversion element, 5 ... Preamplifier, 6 ...
Local oscillator, 7 ... Coupling section.
Claims (4)
ンテナと、前記アンテナの出力部に接続されたジョセフ
ソン素子で構成された周波数変換素子と、前記周波数変
換素子の出力端に接続された前置増幅器と、結合部を介
してその出力の一部を前記アンテナに結合させた局部発
振器とを形成したことを特徴とする超伝導受信変換装
置。1. An antenna composed of a superconducting thin film, a frequency conversion element composed of a Josephson element connected to an output part of the antenna, and an output end of the frequency conversion element on a single substrate. A superconducting receiver / transducer comprising a connected preamplifier and a local oscillator having a part of its output coupled to the antenna through a coupling section.
超伝導体であることを特徴とする請求項１記載の超伝導
受信変換装置。2. The superconducting receiver / transducer according to claim 1, wherein the material of the superconducting thin film is an oxide superconductor containing copper (Cu).
u）を含む酸化物超伝導体であることを特徴とする請求
項１記載の超伝導受信変換装置。3. The material forming the Josephson element is copper (C
The superconducting receiver / transducer according to claim 1, which is an oxide superconductor containing u).
物超伝導体を用いたことを特徴とする請求項１、請求項
２または請求項３記載の超伝導受信変換装置。4. The superconducting receiver / transducer according to claim 1, wherein an oxide superconductor containing copper (Cu) is used for the resonator of the local oscillator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2176716A JPH0795701B2 (en) | 1990-07-04 | 1990-07-04 | Superconducting receiver converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2176716A JPH0795701B2 (en) | 1990-07-04 | 1990-07-04 | Superconducting receiver converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0468717A JPH0468717A (en) | 1992-03-04 |
| JPH0795701B2 true JPH0795701B2 (en) | 1995-10-11 |
Family
ID=16018518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2176716A Expired - Fee Related JPH0795701B2 (en) | 1990-07-04 | 1990-07-04 | Superconducting receiver converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0795701B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0915657D0 (en) * | 2009-09-08 | 2009-10-07 | Siemens Ag | Amplifier |
-
1990
- 1990-07-04 JP JP2176716A patent/JPH0795701B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0468717A (en) | 1992-03-04 |
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