Abstract: A monitoring system for high-frequency circuits which minimizes the insertion loss of additional monitoring circuits while requiring only a small space. An input coupler is placed at the input of a high-frequency circuit whose frequency response is to be monitored. The input coupler has a space where a given high-frequency probing signal can propagate, and it combines this propagating signal with a given electrical input signal. The combined signal is processed by the high-frequency circuit, and the resulting signal is supplied to an output coupler. The output coupler has a space for propagation of a high-frequency probing signal component contained in the received combined signal. The output coupler extracts this propagating signal component for the purpose of monitoring.

Abstract: In a package mounting structure for mounting a package on a case, wherein the package internally incorporates at least one of a high-frequency transistor, MIC and MMIC used in the microwave to millimeter-wave band, and a base thereof is formed of metal and serves as ground, an electrically conductive sheet having excellent thermal conductivity and exhibiting restorability and having a size identical with that of the base of the package is laid on the case at a package-bearing location, the package and sheet are fastened together by two or more screws, and the sheet is mounted on the case while it is pressed by a pressing force of 10 N/cm2 or greater owing to fastening.

Abstract: A coaxial connector 10 to be connected to a coaxial cable comprising a surface coating layer 20 of indium or an indium alloy being formed on the surface of a terminal 12 which is a central conductor. Since indium similar to an indium-based solder material is used as the material of the surface coating layer 20, a reaction product is prevented from being produced in indium-based solder by the reaction between the material of the surface coating layer 20 and the material of the indium-based solder material. Accordingly, deterioration of the flexibility of the indium-based solder can be prevented, and a superconducting device which can endure the repeated temperature changes between the room temperature and lower temperatures can be provided.

Abstract: A resonator is formed by forming a microstrip line having an electrical length corresponding to a ?/2 wavelength on a dielectric substrate, forming both side portions of the microstrip line from the center thereof into spiral shapes, making the orientations of the spirals' opposite each other, making outer-side portions of the spiral shapes on both sides, inclusive of the central portion of the microstrip line, linear in shape overall, and making linear in shape a portion of prescribed range from the end portion of each spiral shape.

Abstract: A gas turbine has a cooling air system supplying air for cooling a high temperature part of the gas turbine and a spray air system supplying air for spraying fuel into a combustor and is formed so that a part of high-pressure air compressed by a gas turbine compressor is used as air of the cooling air system and spray air system, wherein a heat exchanger and a boost compressor are arranged downstream of the outlet of compressed air of the gas turbine compressor, and the boost compressor is composed of a parallel connection of a compressor driven by the turbine shaft and ae compressor driven by a driven source other than the turbine shaft, and pressurized air from the boost compressor is used as air for the cooling air system and the spray air system.

Abstract: A superconducting microstrip filter capable of achieving an improvement of power resistance without enlarging the overall size and while maintaining steep cut characteristics. This filter has a resonator section including at least one resonator. This resonator forms a current density reduction part in one part of its line pattern. Also, the filter has an input line section arranged adjoining the resonator of an initial stage. Current density reduction parts are formed in one part of this input line section. Alternatively, the input line section is comprised of a normal conductor.

Abstract: An antenna coupling module for electromagnetically coupling a planar antenna and a planar type oxide superconductive high frequency circuit not reducing the antenna effective area and sharply reducing the signal loss due to coupling, comprised of a planar antenna and a substrate forming a planar superconductive high frequency circuit arranged in a perpendicular direction with respect to the element surface of the planar antenna and having the planar antenna and the superconductive high frequency circuit electromagnetically coupled.

Abstract: It is the object of the present invention to feed cooling air suitable for cooling the high-temperature part of the gas turbine. The present invention comprises a compressor, a combustor, and a turbine. Further, a turbine-cooling system to feed the gas from the compressor to the turbine is provided, and the turbine-cooling system comprises a heat exchanger to cool the gas compressed by the compressor, and a means for separating liquid from the gas cooled by the heat exchanger. Thus, according to the present invention, it becomes possible to feed cooling air suitable for cooling the high-temperature part of the gas turbine and to achieve higher reliability of the gas turbine unit.

Abstract: A gas turbine has a cooling air system supplying air for cooling a high temperature part of the gas turbine and a spray air system supplying air for spraying fuel into a combustor and is formed so that a part of high-pressure air compressed by a gas turbine compressor is used as air of the cooling air system and spray air system, wherein a heat exchanger and a boost compressor are arranged downstream of the outlet of compressed air of the gas turbine compressor, and the boost compressor is composed of a parallel connection of a compressor driven by the turbine shaft and ae compressor driven by a driven source other than the turbine shaft, and pressurized air from the boost compressor is used as air for the cooling air system and the spray air system.

Abstract: A monitoring system for high-frequency circuits which minimizes the insertion loss of additional monitoring circuits while requiring only a small space. An input coupler is placed at the input of a high-frequency circuit whose frequency response is to be monitored. The input coupler has a space where a given high-frequency probing signal can propagate, and it combines this propagating signal with a given electrical input signal. The combined signal is processed by the high-frequency circuit, and the resulting signal is supplied to an output coupler. The output coupler has a space for propagation of a high-frequency probing signal component contained in the received combined signal. The output coupler extracts this propagating signal component for the purpose of monitoring.

Abstract: A dielectric waveguide which comprises a first single crystal magnesium oxide block having a surface of face (001), (100) or (010) and a first copper oxide superconducting film formed on the above-described surface in a c-axis crystal orientation perpendicular to the surface, and a method of production thereof are provided.

Abstract: A high temperature superconductor film which is Y—Ba—Cu—O-based and formed on a dielectric substrate 10, and has a Cu composition ratio to the Ba near the upper surface of the film which is higher than a Cu composition ratio to the Ba inside the film. The YBCO-based high temperature superconductor film is formed with a Cu composition on the film surface maintained higher with respect to the stoichiometric composition, whereby the Cu oxide can be easily produced while the production of the yttrium oxides can be depressed. The yttrium oxides cannot be easily produced, which makes it difficult for pores and crystal strains to be generated while the Cu oxide functions as a flux for advancing the crystal growth, whereby the YBCO-based high temperature superconductor film can have good film quality and single crystal. The superconducting elements can be formed of the YBCO-based high temperature superconducting film of such good film quality.

Abstract: A gas turbine comprising a compressor, combustor and turbine further comprises (1) a cooling air system for supplying part of air compressed by a compressor to the high temperature section of the turbine, (2) a heater exchanger for exchanging heat of part of air compressed by the compressor, this heater being mounted on the cooling air system, and (3) a system for adjusting the air temperature downstream from the heater exchanger in conformity to the operation period of the turbine.

Abstract: A gas turbine has a cooling air system supplying air for cooling a high temperature part of the gas turbine and a spray air system supplying air for spraying fuel into a combustor and is formed so that a part of high-pressure air compressed by a gas turbine compressor is used as air of the cooling air system and spray air system, wherein a heat exchanger and a boost compressor are arranged downstream of the outlet of compressed air of the gas turbine compressor, and the boost compressor is composed of a parallel connection of a compressor driven by the turbine shaft and ae compressor driven by a driven source other than the turbine shaft, and pressurized air from the boost compressor is used as air for the cooling air system and the spray air system.

Abstract: A high temperature superconductor film which is Y—Ba—Cu—O-based and formed on a dielectric substrate 10, and has a Cu composition ratio to the Ba near the upper surface of the film which is higher than a Cu composition ratio to the Ba inside the film. The YBCO-based high temperature superconductor film is formed with a Cu composition on the film surface maintained higher with respect to the stoichiometric composition, whereby the Cu oxide can be easily produced while the production of the yttrium oxides can be depressed. The yttrium oxides cannot be easily produced, which makes it difficult for pores and crystal strains to be generated while the Cu oxide functions as a flux for advancing the crystal growth, whereby the YBCO-based high temperature superconductor film can have good film quality and single crystal. The superconducting elements can be formed of the YBCO-based high temperature superconducting film of such good film quality.

Abstract: A gas turbine has a cooling air system supplying air for cooling a high temperature part of the gas turbine and a spray air system supplying air for spraying fuel into a combustor and is formed so that a part of high-pressure air compressed by a gas turbine compressor is used as air of the cooling air system and spray air system, wherein a heat exchanger and a boost compressor are arranged downstream of the outlet of compressed air of the gas turbine compressor, and the boost compressor is composed of a parallel connection of a compressor driven by the turbine shaft and ae compressor driven by a driven source other than the turbine shaft, and pressurized air from the boost compressor is used as air for the cooling air system and the spray air system.

Abstract: A superconducting microstrip filter capable of achieving an improvement of power resistance without enlarging the overall size and while maintaining steep cut characteristics. This filter has a resonator section including at least one resonator. This resonator forms a current density reduction part in one part of its line pattern. Also, the filter has an input line section arranged adjoining the resonator of an initial stage. Current density reduction parts are formed in one part of this input line section. Alternatively, the input line section is comprised of a normal conductor.

Abstract: A superconducting signal transmission apparatus provided with a vacuum container 11, a superconducting electronic device 12 provided in the vacuum container 11, an input side transmission line 13 and output side transmission line 14 for connection to the superconducting electronic device 12 through the vacuum container 11, and a cooling mechanism (15, 16, 17) for cooling the superconducting electronic device 12 and further having a heat cutoff signal transmission unit 20 inserted at least at part of the input side and output side transmission lines 13 and 14. The heat cutoff signal transmission unit 20 is comprised of a substrate 31 and a flat circuit body 30 provided with a signal transmission line 32 and ground layer (33, 33-1, 33-2). The substrate 31 is comprised of a dielectric material having a small heat conductivity. The conductor portions forming the signal transmission line 32 and the ground layer are formed with thin thicknesses enabling suppression of the inflow of heat from the outside.

Abstract: A gas turbine has a cooling air system supplying air for cooling a high temperature part of the gas turbine and a spray air system supplying air for spraying fuel into a combustor and is formed so that a part of high-pressure air compressed by a gas turbine compressor is used as air of the cooling air system and spray air system, wherein a heat exchanger and a boost compressor are arranged downstream of the outlet of compressed air of the gas turbine compressor, and the boost compressor is composed of a parallel connection of a compressor driven by the turbine shaft and ae compressor driven by a driven source other than the turbine shaft, and pressurized air from the boost compressor is used as air for the cooling air system and the spray air system.

Abstract: A gas turbine has a cooling air system supplying air for cooling a high temperature part of the gas turbine and a spray air system supplying air for spraying fuel into a combustor and is formed so that a part of high-pressure air compressed by a gas turbine compressor is used as air of the cooling air system and spray air system, wherein a heat exchanger and a boost compressor are arranged downstream of the outlet of compressed air of the gas turbine compressor, and the boost compressor is composed of a parallel connection of a compressor driven by the turbine shaft and ae compressor driven by a driven source other than the turbine shaft, and pressurized air from the boost compressor is used as air for the cooling air system and the spray air system.