Abstract: A power supply system for a floating mobile body or an underwater mobile body moving on or under water in a water channel or a water tank is configured to supply, in a non-contact manner, power from a power transmission apparatus to a power reception apparatus. The power transmission apparatus includes an AC power source that includes a first terminal and a second terminal and outputs an AC power wave, a power transmission inductance element having one terminal connected to the first terminal, and a first power transmission electrode provided in the water channel or the water tank and having an end portion connected to another terminal of the power transmission inductance element. The power reception apparatus includes a first power reception electrode, a second power reception electrode provided apart from the first power reception electrode, and a power reception inductance element connected to the first power reception electrode.

Abstract: Provided is a power feeding device capable of performing wireless power feeding at a joint of elongated objects and mitigating a decline in transmission efficiency even through a long elongated object multistage-connected body. A power feeding device 1 includes an elongated object multistage-connected body in which elongated objects 3 each provided with a power feed circuit 30 are connected in multiple stages, wherein the power feed circuit 30 of one elongated object 3 is provided with a power-receiving coil 31 which wirelessly receives power from the power feed circuit 30 of another elongated object 3, a power feed line 32, and a power-transmitting coil 33 which wirelessly transmits power to the power feed circuit 30 of another elongated object 3, and the plurality of power feed circuits 30 constitute a periodic circuit.

Abstract: A resonator having a dielectric element, a metal housing accommodating the dielectric element, and a low relative permittivity material holding the dielectric element so as to have a predetermined clearance generated between a dielectric element surface of the dielectric element to which a generated electric field is substantially orthogonal and a housing surface of the metal housing opposed to the dielectric element surface.

Abstract: A notch filter made up from laminated dielectric, which attenuates a specific frequency of a signal to be transmitted, comprises two terminals for input or output a signal to be transmitted, a line connected between those terminals, two resonators each having one end connected to ground and an other end, two first coupling capacitors, and a second coupling capacitor. Each end of the line is connected to the other end of the resonator through the first capacitor. The second capacitor couples said two resonators each other.

Abstract: In a dual-mode filter, this invention is capable of optionally setting an attenuation pole frequency with maintaining a passbandwidth of the filter by selecting a combination of an angle between input/output ports and a size of a stub perturbation. The dual-mode filter includes a circular resonator formed on a dielectric substrate, a pair of input/output ports connected to the circular resonator through a capacitance formed on the substrate at a symmetrical position with respect to a symmetry plane passing through a center of the circular shape of the circular resonator, and stub poles are formed on the substrate radially extending along the symmetry plane from opposite positions of the circular resonator in the diametrical direction with each other. The pair of input/output ports are formed with defining an angle different from a right angle therebetween.

Abstract: A half-wavelength resonator type high frequency filter has N half-wavelength resonators (where N is an integer not smaller than 2); an input terminal; an output terminal; first matching part for matching the first of the resonators to the input terminal; second matching part for matching the N-th of the resonators to the output terminal; and (N−1) interstage coupling part for coupling the resonators with one another, and wherein excitation positions of the first of the resonators and the N-th of the resonators are displaced from the center positions of the respective resonators toward an end thereof, and at least one of the interstage coupling part is electrically connected to its associated resonators at positions other than both ends thereof.

Abstract: A dielectric waveguide-type filter is fabricated by vapor depositing or coating all but one of the four sides extending in the axial direction of a six-sided dielectric block that is long in its axial direction lying perpendicular to its width and height with a conductive material and either leaving the fourth side surface open or forming it with a conductive pattern depending on whether the filter characteristics to be obtained are high-pass characteristics, band-pass characteristics or band-rejection characteristics, the conductive pattern, if formed, being formed in a configuration and distribution depending on the filter characteristics to be obtained. A pair of electrode patterns for electrical connection with an exterior circuit are provided by patterning of conductive material on the opposite axial end surfaces of the dielectric block or on the open surface at positions near the opposite axial end surfaces.

Abstract: A compact resonant wave filter capable of selectively propagating an electromagnetic wave of a prescribed frequency with excellent band-pass wave filter characteristics comprises a TM mode resonator disposed perpendicularly to the direction of propagation of electromagnetic wave energy, a pair of TEM mode resonators disposed one on either side or said TM mode resonator in the direction of propagation of electromagnetic wave energy, and a pair of cutoff waveguides disposed one between said TEM mode resonator and each of said TM mode resonators to couple said TEM mode resonator with said TM mode resonators in evanescent mode.