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    • 3. 发明授权
    • Josephson junction in a wiring pattern of a superconductor oxide
    • 约瑟夫逊结在超导体氧化物的布线图中
    • US5534715A
    • 1996-07-09
    • US148277
    • 1993-11-08
    • Christian NeumannKatsumi SuzukiYouichi EnomotoShoji Tanaka
    • Christian NeumannKatsumi SuzukiYouichi EnomotoShoji Tanaka
    • H01L39/22H01L39/24
    • H01L39/2496
    • A Josephson junction is disclosed which includes a substrate of a single crystal having a substantially flat surface, a wiring pattern of an oxide superconductor formed on the flat surface of the substrate, and an altered region formed having a width of 300 nm or less and formed in the wiring pattern to intersect the wiring pattern, the crystal orientations of the wiring pattern on both sides of the altered region being equal to each other. The Josephson junction may be prepared by a process including the steps of: (a) coating a surface of a substrate of a single crystal with a normal metal to form a protecting layer over the surface of the substrate; (b) irradiating a predetermined portion of the protecting layer with a focused ion beam so that an irradiated portion is formed in the substrate; (c) removing the protecting layer from the substrate; and (d) forming a wiring pattern of an oxide superconductor on the surface of the substrate from which the protecting layer has been removed such that the wiring pattern crosses the irradiated portion of the substrate, thereby forming an altered portion in the wiring pattern at a position above the irradiated portion.
    • 公开了一种约瑟夫逊结,其包括具有基本上平坦的表面的单晶的衬底,形成在衬底的平坦表面上的氧化物超导体的布线图案和形成为具有300nm或更小的宽度的改变区域 在与布线图案相交的布线图案中,改变区域两侧的布线图案的晶体取向彼此相等。 约瑟夫逊结可以通过包括以下步骤的方法来制备:(a)用普通金属涂覆单晶的衬底的表面以在衬底的表面上形成保护层; (b)用聚焦离子束照射保护层的预定部分,使得在基板中形成照射部分; (c)从衬底上去除保护层; 以及(d)在已经去除了保护层的基板的表面上形成氧化物超导体的布线图案,使得布线图案与基板的照射部分交叉,从而在布线图案中形成改变部分 位于照射部分上方。
    • 5. 发明授权
    • Superconductor mixer and phase control method therefor
    • 超导体混合器及其相位控制方法
    • US5920811A
    • 1999-07-06
    • US876244
    • 1997-06-16
    • Katsumi SuzukiYouichi EnomotoShoji Tanaka
    • Katsumi SuzukiYouichi EnomotoShoji Tanaka
    • H01L39/22H03D7/12H04B1/28H04B1/26
    • H04B1/28H03D7/005
    • In a superconductor mixer, a non-linear element is provided on a substrate. The non-linear element comprises at least one Josephson junction connected in series. An antenna pattern of superconductor, an intermediate frequency output pattern of superconductor, and a bias current pattern of superconductor are connected to the non-linear element. A signal high frequency wave (RF) and a local reference frequency wave (LO) are received by the antenna pattern and then absorbed in the non-linear element to obtain an intermediate frequency (IF) signal. Then, with applying a current to the series connected Josephson junction in the non-linear element from the bias current pattern, the intermediate frequency (IF) signal as a frequency signal of a difference between the signal high frequency wave (RF) and the local reference frequency wave (LO) is output to the intermediate frequency output pattern. At this time, by varying the current supplied from the bias current pattern, a phase of the output intermediate frequency (IF) signal is varied.
    • 在超导体混合器中,在衬底上提供非线性元件。 非线性元件包括至少一个串联连接的约瑟夫逊结。 超导体的天线图案,超导体的中频输出图案和超导体的偏置电流图案被连接到非线性元件。 信号高频(RF)和局部参考频率波(LO)由天线方向接收,然后被吸收在非线性元件中以获得中频(IF)信号。 然后,通过从偏置电流模式向非线性元件中的串联连接的约瑟夫逊结施加电流,将中频(IF)信号作为信号高频波(RF)与本地 参考频率波(LO)被输出到中频输出模式。 此时,通过改变从偏置电流模式提供的电流,改变输出中频(IF)信号的相位。
    • 6. 发明授权
    • High frequency band high temperature superconductor mixer antenna which
allows a superconductor feed line to be used in a low frequency region
    • 高频高温超导体混频器天线,允许在低频区域使用超导体馈线
    • US5812943A
    • 1998-09-22
    • US706800
    • 1996-09-03
    • Katsumi SuzukiYouichi EnomotoShoji Tanaka
    • Katsumi SuzukiYouichi EnomotoShoji Tanaka
    • H01L39/22H01Q1/24H01Q1/36H01Q13/08H01Q21/00H04B1/18H04B1/26
    • H01Q1/247H01Q1/364
    • The invention provides a wide frequency band high temperature superconductor mixer antenna which allows a superconductor feed line, which exhibits a high resistance loss in a high frequency region, to be used in a low frequency region with a low loss and which is provided with a same structure as a mixer which has a wide band twice or more the frequency of a millimeter or more wave while keeping a characteristic of a high integration array antenna, which makes most of the high integrity of superconductor feed lines. The wide frequency band high temperature superconductor mixer antenna includes one or a plurality of planar structure antenna patterns of the log-periodical type or the log-spiral type and a plurality of oxide superconductor thin film feed line wiring patterns formed on a same face of a main surface of a substrate, a central portion of each of the planar structure antenna patterns being formed from an oxide superconductor thin film on which a non-linear element part is provided.
    • 本发明提供了一种宽带高温超导体混频器天线,其允许在高频区域表现出高电阻损耗的超导体馈电线用于具有低损耗的低频区域并且具有相同的 结构作为混频器,其具有两倍或更多的毫米波或更多波的频率,同时保持高集成阵列天线的特性,这使得超导体馈线的大部分高度完整性。 宽频带高温超导体混频器天线包括对数周期型或对数螺旋型的一个或多个平面结构天线图案,以及形成在同一面上的多个氧化物超导体薄膜馈送线布线图案 基板的主表面,每个平面结构天线图案的中心部分由其上设置有非线性元件部分的氧化物超导薄膜形成。