Abstract: In a battery power supply apparatus for low-noise measurement systems or ultra high-sensitivity sensor elements (ultra-sensitive light or microwave sensors, or SQUID, SIS/SNS or other Josephson effect devices, etc.), the power supply device that supplies power to the outside and the control device that controls the power supply device perform bidirectional communications by means of an optical communications circuit, and thus it is possible to prevent noise arising in the control device from reaching the power supply device. In addition, it is possible to prevent the introduction of noise from the optical communications circuit into the power supply device within a shield case. Accordingly, it is possible to control the operation of the power supply device enclosed within the shield case from the control device outside of the shield case without having external noise affecting the power supply device.

Abstract: Roadside wireless devices (1) are installed at roadside positions corresponding to the traffic lanes entering an intersection. Roadside wireless devices (1) are also installed at roadside positions corresponding to the traffic lanes exiting an intersection. The roadside wireless devices (1) on the entrance side receive an identification number from vehicle-mounted wireless ID devices (3) of vehicles entering the intersection and transmit them to a roadside traffic monitoring device (2). Thereafter, the roadside wireless devices (1) on the exit side receive an identification number from the vehicle-mounted wireless ID devices (3) of vehicles exiting the intersection and transmit them to the roadside traffic monitoring device (2). From the identification numbers received, the roadside traffic monitoring device (2) is able to determine the entrance from which a vehicle judged to be the same one had entered and the exit from which it exited, along with the type of vehicle.

Abstract: In a battery power supply apparatus for low-noise measurement systems or ultra high-sensitivity sensor elements (ultra-sensitive light or microwave sensors, or SQUID, SIS/SNS or other Josephson effect devices, etc.), the power supply device that supplies power to the outside and the control device that controls the power supply device perform bidirectional communications by means of an optical communications circuit, and thus it is possible to prevent noise arising in the control device from reaching the power supply device. In addition, it is possible to prevent the introduction of noise from the optical communications circuit into the power supply device within a shield case. Accordingly, it is possible to control the operation of the power supply device enclosed within the shield case from the control device outside of the shield case without having external noise affecting the power supply device.

Abstract: A method is provided for measuring harmonic load-pull for frequency multiplication to obtain a load impedance and a source impedance for which frequency multiplication performance of a frequency multiplication device is optimized. A fundamental frequency signal is supplied to a frequency multiplication device under test from a source measurement system that includes a source mechanical tuner for adjusting a fundamental source impedance of an input signal. A load impedance frequency is obtained at which multiplication performance of the frequency multiplication device is optimum from a load measurement system that includes a load mechanical tuner for adjusting a load impedance of a target even-order multiplied signal among harmonics included in signal output of the frequency multiplication device.

Abstract: A planar radiating oscillator apparatus for micro- and milliwaves includes a pair of conductor patches disposed with their pointed portions in proximity and their far edges on opposite sides, a high-frequency transistor disposed between and connected to the conductor patches, a conductor planar surface disposed under and parallel to the fan-shaped conductor patches from which it is separated by a distance equal to between one-fifteenth and one-fifth the generated wavelength therefrom, and at least one direct current power source connected to the conductor patches and having a ground potential in common with a source potential of the high-frequency transistor.

Abstract: A lower resist film, which is made of PMMA for EB exposure and has a thickness of about 200 nm, is applied onto a substrate, and then an upper resist film to be exposed to i-rays is applied on the lower resist film. Thereafter, a mixed layer, in which the upper and lower resist films are mixed, is formed in the interface between the upper and lower resist films. Next, the upper resist film, except for the head-forming region thereof, is exposed to i-rays and developed, thereby forming an upper-layer opening. And then the mixed layer and a leg-forming region of the lower resist film are exposed to EB and developed, thereby forming a lower-layer opening having an upper part like a taper progressively expanding upward.

Abstract: A radiating oscillator apparatus for micro- and millimeter waves includes paired fan-shaped conductor patches disposed with their pointed portions in proximity and their arcuate portions on opposite sides, at least one high-frequency transistor disposed between and connected to the fan-shaped conductor patches, a conductor planar surface disposed under and parallel to the fan-shaped conductor patches at an interval of between one-fifteenth and one-fifth the generated wavelength therefrom, and a pair of direct current power supplies connected to the fan-shaped conductor patches separately with a common ground potential.

Abstract: A Gaussian-beam antenna invention comprises a transmitting circuit or a receiving circuit, a resonator consisting of a pair of reflecting mirrors, which consist of a spherical mirror and a planar mirror or two spherical mirrors, and a transmission line which transmits a high-frequency signal between the aforesaid transmitting circuit or receiving circuit and the resonator, one reflecting mirror of the resonator having an electromagnetic wave coupling region constituted as a circular partially transparent mirror surface region having its center on the optical axis.

Abstract: A Gaussian-beam oscillator for microwave and millimeter wave comprising a negative resistance amplifier circuit which produces and amplifies a high-frequency signal, a resonator consisting of a pair of reflecting mirrors, which consist of a spherical mirror and a planar mirror or two spherical mirrors, and a wave path which transmits the high-frequency signal between said resonator and said negative resistance amplifier circuit, one reflecting mirror of said resonator having an electromagnetic wave coupling region constituted as a circular partially transparent mirror surface region having its center on the optical axis, the other reflecting mirror having a strip element provided at the center of the optical axis and on the rear surface of said strip element having a coupling region for coupling with said wave path, said one reflecting mirror constituting said resonator and having the electromagnetic wave coupling region having a higher reflectance than the reflectance of the other reflecting mirror.

Abstract: The surface characteristics with respect to a high-frequency electromagnetic field of a material to be tested are measured by placing opposite a flat mirror material to be tested one of a pair of concave spherical reflection mirrors fabricated in the same way and formed with high-reflectance circular coupling regions, placing the other spherical reflection mirror at a position symmetrical to the one reflection mirror with respect to the flat mirror material as the plane of symmetry, measuring the Q value of the open resonator formed by the one reflection mirror and the flat mirror material, removing the flat mirror material from the optical axis, measuring the Q value of the open resonator formed by the pair of spherical reflection mirrors, calculating the absolute value of the reflectance of the flat mirror material to be tested from the difference between the two measured Q values, and calculating the phase of the reflected wave at the surface of the flat mirror material to be tested from the measured reson

Abstract: A superconducting weak link device includes a plurality of interconnected small superconducting regions and a plurality of conductive bridges which connect adjacent the small superconducting regions in which the length of the bridges is in the range from 1 to 5.31 times the coherence length.

Abstract: An open resonator comprises two concave spherical reflectors or one spherical and one plane reflectors positioned so as to form a resonant structure and each being provided at an electromagnetic coupling region thereof with a large number of conductor stripes disposed in parallel at a spacing sufficiently small in comparison with the wavelength of an incident electromagnetic wave. The diameter of the circular coupling region can be made very large in comparison with the wavelength. An ultra-high Q value can be obtained with the open resonator with very high excitation efficiency to a resonator mode. The Q value of the open resonator can be varied with the angle between the directions of the conductor stripes of the two reflecting mirrors.