Abstract: A electric wire includes a central conductor 1 made of aluminum or an aluminum alloy, a cover layer 2 made of copper and covering the central conductor 1, and a ferromagnetic layer 3 covering the cover layer 2 and blocking the external magnetic field. The thickness of the ferromagnetic layer 3 is in a range from 0.04 ?m to 14 ?m, the total diameter of the central conductor 1 and the cover layer 2 is in a range from 0.05 mm to 0.4 mm, and the cross-sectional area of the central conductor 1 is in a range from 85% to 95% of the total cross-sectional area of the central conductor 1 and the cover layer 2.

Abstract: A electric wire includes a central conductor 1 made of aluminum or an aluminum alloy, a cover layer 2 made of copper and covering the central conductor 1, and a ferromagnetic layer 3 covering the cover layer 2 and blocking the external magnetic field. The thickness of the ferromagnetic layer 3 is in a range from 0.04 ?m to 14 ?m, the total diameter of the central conductor 1 and the cover layer 2 is in a range from 0.05 mm to 0.4 mm, and the cross-sectional area of the central conductor 1 is in a range from 85% to 95% of the total cross-sectional area of the central conductor 1 and the cover layer 2.

Abstract: A dipole antenna in accordance with the present invention includes a first antenna element provided in a two-dimensional surface and having a linear shape and a second antenna element provided in the two-dimensional surface and having a spiral shape that circles around the first antenna element.

Abstract: A loop antenna in accordance with the present invention has an antenna element having a shape that traces a closed curve, the antenna element including (i) a first projection section which projects from one of two end sections of the antenna element toward an inside of the closed curve and (ii) a second projection section which projects from the other of the two end sections of the antenna element toward the inside of the closed curve, each of the first projection section and the second projection section including a feed point.

Abstract: An electric wire includes a conductive portion 11 made of a material having a volume resistivity higher than that of copper, wherein the volume resistivity of the conductive portion is specified so that, in a frequency range in which the electric wire is used, a ratio of AC resistance of the conductive portion 11 to AC resistance of reference copper wire is less than 1.

Abstract: A electric wire includes a central conductor 1 made of aluminum or an aluminum alloy, a cover layer 2 made of copper and covering the central conductor 1, and a ferromagnetic layer 3 covering the cover layer 2 and blocking the external magnetic field. The thickness of the ferromagnetic layer 3 is in a range from 0.04 ?m to 14 ?m, the total diameter of the central conductor 1 and the cover layer 2 is in a range from 0.05 mm to 0.4 mm, and the cross-sectional area of the central conductor 1 is in a range from 85% to 95% of the total cross-sectional area of the central conductor 1 and the cover layer 2.

Abstract: An electric wire includes a conductive portion 11 made of a material having a volume resistivity higher than that of copper, wherein the volume resistivity of the conductive portion is specified so that, in a frequency range in which the electric wire is used, a ratio of AC resistance of the conductive portion 11 to AC resistance of reference copper wire is less than 1.

Abstract: A electric wire includes a central conductor 1 made of aluminum or an aluminum alloy, a cover layer 2 made of copper and covering the central conductor 1, and a ferromagnetic layer 3 covering the cover layer 2 and blocking the external magnetic field. The thickness of the ferromagnetic layer 3 is in a range from 0.04 ?m to 14 ?m, the total diameter of the central conductor 1 and the cover layer 2 is in a range from 0.05 mm to 0.4 mm, and the cross-sectional area of the central conductor 1 is in a range from 85% to 95% of the total cross-sectional area of the central conductor 1 and the cover layer 2.

Abstract: There is provided a planar optical waveguide element in which an optical waveguide core comprises an inner side core having protruding portions that form a rib structure, and an outer side core that is provided on top of the inner side core and that covers circumferential surfaces of the protruding portions, wherein a refractive index of the outer side core is lower than an average refractive index of the inner side core. The structure of the planar optical waveguide element can be applied even when the core is formed from a material having a higher refractive index than that of a silica glass-based material such as silicon (Si) or silicon nitride (SixNy).

Abstract: An antenna device (10) includes: an antenna (100) including a radiating element (101) and an internal ground (103); a coaxial cable (200) whose internal conductor (204) is connected with the radiating element (101) and whose external conductor (203) is connected with the internal ground (103); and an external ground (500) capacitive-coupled with the external conductor (203) of the coaxial cable (200).

Abstract: An antenna (1) including a dielectric substrate (10), an antenna element (11), a feed line (12), and a ground plate (13) is configured such that the feed line (12) and the ground plate (13) which face each other via the dielectric substrate (10) constitute a microstrip line which functions as a BRF.

Abstract: An antenna device (10) includes: an antenna (100) including a radiating element (101) and an internal ground (103); a coaxial cable (200) whose internal conductor (204) is connected with the radiating element (101) and whose external conductor (203) is connected with the internal ground (103); and an external ground (500) connected with the external conductor (203) of the coaxial cable (200).

Abstract: An electric wire includes a conductive portion 11 made of a material having a volume resistivity higher than that of copper, wherein the volume resistivity of the conductive portion is specified so that, in a frequency range in which the electric wire is used, a ratio of AC resistance of the conductive portion 11 to AC resistance of reference copper wire is less than 1.

Abstract: There is provided an optical fiber communication system restricting enlargement of the diameter of an optical fiber as well as enabling achievement of a large-capacity optical communication with a small number of optical fibers. An optical fiber communication system 100 includes an optical transmitter 10 transmitting a plurality of optical signals in parallel, a multicore fiber 20 in which outer circumferences of a plurality of cores are covered with a common clad, and the respective optical signals transmitted in parallel from the optical transmitter 10 are input into the cores, and an optical receiver 30 receiving the optical signals output in parallel from the respective cores of the multicore fiber, wherein the optical transmitter 10 and the optical receiver 30 perform a MIMO communication.

Abstract: An antenna integrated harness in accordance with an embodiment of the present invention includes: a wire harness formed by bundling a plurality of electric cables; an antenna element which is two-dimensional planar and is provided on, while conforming to, a surface of the wire harness; and a feed line connected with the antenna element and bundled with the plurality of electric cables.

Abstract: An antenna device includes: a plate-like antenna having an electrically conductive path arranged in a two-dimensional manner, the electrically conductive path having a meander shape which is made up of at least one return pattern; and a base member, while causing the antenna to be spaced away from an outer surface of a body containing an electrically conductive material layer of a movable body, holding the antenna in such a manner as to conform to the outer surface, the base member being made from a dielectric material.

Abstract: There is provided a planar optical waveguide element including a core, the core including first and second portions and a gap portion that is positioned in a center of a width direction of the core between the first and second portions so as to extend in a light waveguide direction. The gap portion has a lower refractive index than that of the first and second portions, and a single mode propagated in the waveguide element has a span crossing the first and second portions.

Abstract: An electric wire includes a conductive portion 11 made of a material having a volume resistivity higher than that of copper, wherein the volume resistivity of the conductive portion is specified so that, in a frequency range in which the electric wire is used, a ratio of AC resistance of the conductive portion 11 to AC resistance of reference copper wire is less than 1.

Abstract: An electric wire includes a conductive portion 11 made of a material having a volume resistivity higher than that of copper, wherein the volume resistivity of the conductive portion is specified so that, in a frequency range in which the electric wire is used, a ratio of AC resistance of the conductive portion 11 to AC resistance of reference copper wire is less than 1.

Abstract: A method for manufacturing a planar optical waveguide device of which a core includes a plurality of alternatively arranged fin portions and valley portions to form a grating structure, in which the core widths of the valley portions vary along the longitudinal direction, the method including: a high refractive index material layer forming step of forming a high refractive index material layer; a photoresist layer forming step of forming a photoresist layer on the high refractive index material layer; a first exposure step of forming shaded portions on the photoresist layer using a phase-shifting photomask; a second exposure step of forming shaded portions on the photoresist layer using a binary photomask; a development step of developing the photoresist layer; and an etching step of etching the high refractive index material layer using the photoresist pattern resulted from the development step.