摘要:
According to an embodiment, a control apparatus includes a shaper and a compensator. The shaper receives a first target value in position control of a controlled object and generates a second target value which changes substantially rampwise over a time equal to or shorter than a period corresponding to one of resonance frequencies of the controlled object until the second target value becomes equal the first target value. The compensator compensates for a control signal, used for controlling the controlled object, based on the second target value.
摘要:
A filter according to embodiments includes n resonators, an input line, and an output line. Each of the resonators includes a first comb-like structure, a second comb-like structure, and a connection line that connect the first and the second comb-like structure. The first and second comb-like structures have a plurality of first lines and a second line that is connected to one end of the first lines. The first lines of the first and the second comb-like structures are arranged parallel to each other. The connection line has bending portions. Further, a second comb-like structure of a k-th resonator and a first comb-like structure of a (k+1)-th resonator are arranged so as to have an interlaced arrangement, and a second comb-like structure of the (k+1)-th resonator and a first comb-like structure of a (k+2)-th resonator are arranged so as to have an interlaced arrangement.
摘要:
A heat insulating transmission line includes a first waveguide with a first aperture end, a second waveguide with a second aperture end, and a reflector. The second waveguide is arranged coaxially with the first waveguide. The second aperture end faces the first aperture end through an air gap. The reflector is provided outside the air gap, and controls radiation power from the air gap. In addition, the reflector is substantially parallel to a portion of a virtual plane connecting an inner wall of the first aperture end of the first waveguide and an inner wall of the second aperture end of the second waveguide. When a mean frequency of a signal transmitting through the heat insulating transmission line is expressed as λ, a distance between the virtual surface and the reflector is not less than N×λ/2−0.05λ and not more than N×λ/2+0.2λ (N is a positive integer).
摘要:
A displacement conversion mechanism of an embodiment is a displacement conversion mechanism which is provided with a base, a displacement element which is in contact with the base and is displaced in a first direction, a first displacement portion which is in contact with the displacement element and can be displaced in the first direction, a second displacement portion which connects to an end of the first displacement portion at a first connection portion, and connects to the base at a second connection portion, and a third displacement portion which connects to the other end of the first displacement portion, connects to an end portion of the second displacement portion at a fourth connection portion, and can be displaced in a second direction intersecting with the first direction.
摘要:
According to one embodiment, a screening device includes a first antenna configured to transmit a first microwave to a subject to generate a second microwave and a third microwave, the second microwave being generated by a diffraction of the first microwave at the subject, the third microwave being a part of the first microwave passing the subject, and a second antenna configured to receive the second microwave in a first period and to receive the third microwave in a second period.
摘要:
A magnetic resonance imaging apparatus of an embodiment includes a housing, a static magnet field source having a superconducting coil or a permanent magnet, and a superconducting array antenna which are provided inside of the housing. The superconducting array antenna includes an A/D conversion element configured to convert a received analog signal into a digital signal.
摘要:
A magnetic resonance imaging apparatus of an embodiment includes a housing, a static magnetic field source having a superconducting coil or a permanent magnet inside the housing, and a superconducting array antenna inside the housing.
摘要:
A superconducting filter device of an embodiment includes: a high-frequency filter includes a superconducting element, and a dielectric member; and a drive tool configured to adjust a distance between the superconducting element and the dielectric member. The dielectric member and the drive tool take both a connection state and a separation state.
摘要:
A heat insulating transmission line includes a first waveguide with a first aperture end, a second waveguide with a second aperture end, and a reflector. The second waveguide is arranged coaxially with the first waveguide. The second aperture end faces the first aperture end through an air gap. The reflector is provided outside the air gap, and controls radiation power from the air gap. In addition, the reflector is substantially parallel to a portion of a virtual plane connecting an inner wall of the first aperture end of the first waveguide and an inner wall of the second aperture end of the second waveguide. When a mean frequency of a signal transmitting through the heat insulating transmission line is expressed as λ, a distance between the virtual surface and the reflector is not less than N×λ/2−0.05λ and not more than N×λ/2+0.2λ (N is a positive integer).
摘要:
According to one embodiment, an antenna apparatus includes an antenna, a duplexer, a reception circuit, a phase controller, a combining unit, a thermally insulating container and a cooling unit. A reception circuit configured to separate a frequency of a signal received by the antenna into a plurality of reception pathways via BPFs (Band Pass Filters) corresponding to the number of transmittable frequencies, extract the reception signals, amplify with low noise the extracted reception signals by an LNA (Low Noise Filter) for the separated reception pathways, select a reception pathway corresponding to the transmission frequency from the separated reception pathways, and output the reception signal amplified with low noise to the selected reception pathway.