Patent application number | Description | Published |
20080238577 | REFLECTION-TYPE BANDPASS FILTER - A reflection-type bandpass filter for ultra-wideband wireless data communication is provided. The filter comprises two conductors extending in a first direction on the surface of a dielectric substrate at a first distance from each other, the surface of the dielectric substrate between the conductors defining a non-conducting portion, wherein the width of the two conductors or the first distance, or both, varies in a length direction of the two conductors. Furthermore, a reflection-type bandpass filter comprising a dielectric substrate; a first conductor provided on the surface of the dielectric substrate; and a side conductor provided next to the first conductor at a first distance from the first conductor, with a non-conducting portion intervening a portion between the first and side conductors, wherein the first conductor width or the distance between the first and side conductors, or both, varies along the length direction of the first conductor, is provided. | 10-02-2008 |
20080247721 | PHOTONIC BAND GAP FIBER AND METHOD OF PRODUCING THE SAME - A photonic band gap fiber is provided having multiple air holes in a silica portion extending in the longitudinal direction of the fiber. The fiber includes a cladding containing an air hole periodic structure in an extended triangular lattice configuration, wherein first rows each having a number of air holes at a first pitch are arranged alternately in the cross section of the fiber with multiple second rows of air holes each with multiple air holes at a second pitch which is twice the first pitch. The fiber further includes an air hole core. | 10-09-2008 |
20090072928 | REFLECTION-TYPE BANDPASS FILTER - This invention provides a reflection-type bandpass filter for ultra-wideband wireless data communication, in which are provided, on the surface of a dielectric substrate, a center conductor and side conductors, provided on both sides of the center conductor, securing a prescribed distance between conductors with non-conducting portions intervening therebetween. The center conductor width or the distances between conductors, or both, are distributed non-uniformly in a length direction of the center conductor. | 03-19-2009 |
20090208176 | EXTENDED TRIANGULAR LATTICE TYPE PHOTONIC BANDGAP FIBER - An extended triangular lattice type photonic bandgap fiber, includes a cladding and a capillary core, the cladding having a plurality of holes disposed within a silica glass portion in a longitudinal direction of the fiber and arranged in an extended triangular lattice shape, the capillary core having a plurality of holes arranged in a triangular lattice shape, wherein the cross-sectional area of the respective holes in the capillary core is smaller than that of the respective holes in the cladding. | 08-20-2009 |
20100254656 | OPTICAL WAVEGUIDE, METHOD FOR MANUFACTURING THE OPTICAL WAVEGUIDE, AND OPTICAL DEVICE PROVIDED WITH THE OPTICAL WAVEGUIDE - An optical waveguide comprising a cladding and a core embedded in the cladding. An equivalent refractive index of the core changes unevenly along a light propagation direction by changing physical dimensions of the core. | 10-07-2010 |
20100316341 | OPTICAL WAVEGUIDE-TYPE WAVELENGTH DISPERSION COMPENSATION DEVICE AND MANUFACTURING METHOD THEREOF - The optical waveguide-type wavelength dispersion compensation device of the present invention has an optical waveguide as a reflection-type wavelength dispersion compensation device. The equivalent refractive index of a core changes unevenly along a light propagation direction by changing physical dimensions of the core that is embedded in a cladding. The core is designed by (a) setting a first desired reflection spectrum, ignoring transmission losses of the optical waveguide, and designing an optical waveguide that is capable of compensating the wavelength dispersion of an optical fiber to be compensated; (b) deriving a wavelength dependency characteristic of a transmission loss amount of the optical waveguide from an effective length of the optical waveguide designed in process (a); and (c) adding a reverse dependency characteristic of the wavelength dependency characteristic to the first reflection spectrum to correct it to a second reflection spectrum, and redesigning an equivalent refractive index distribution of the optical waveguide designed in the process (a) by using this second reflection spectrum. | 12-16-2010 |
20100322558 | OPTICAL WAVEGUIDE ELEMENT, CHROMATIC DISPERSION COMPENSATOR, METHODS FOR DESIGNING CHROMATIC DISPERSION COMPENSATOR, OPTICAL FILTER, METHODS FOR DESIGNING OPTICAL FILTER, OPTICAL RESONATOR AND METHODS FOR DESIGNING OPTICAL RESONATOR - There is provided an optical waveguide element comprises: a core of an optical waveguide; and a Bragg grating pattern that is provided on the core, wherein a pitch of the Bragg grating pattern takes a value from among three or more predetermined discrete values; the pitches that take the respective discrete values are present in a plurality of locations over an entire length of the optical waveguide respectively; and if a value from among all of the discrete values which has the highest distribution frequency is taken as M, and if the closest value to the M which is larger than the M is taken as A, and if the closest value to the M which is smaller than the M is taken as B, then a difference expressed as A−M is equal to a difference expressed as M−B. | 12-23-2010 |
20100322559 | PLANAR OPTICAL WAVEGUIDE ELEMENT, CHROMATIC DISPERSION COMPENSATOR, OPTICAL FILTER, OPTICAL RESONATOR AND METHODS FOR DESIGNING THE ELEMENT, CHROMATIC DISPERSION COMPENSATOR, OPTICAL FILTER AND OPTICAL RESONATOR - There is provided a planar optical waveguide element in which an optical waveguide comprises a core, and a gap portion that is positioned in a center of a width direction of the core so as to extend in a propagation direction of guided light, and that has a lower refractive index than that of the core; and wherein the core comprises two areas that are separated by the gap portion, and a single mode optical waveguide, in which a single mode is propagated span crossing these two areas, is formed. | 12-23-2010 |
20100329608 | PLANAR OPTICAL WAVEGUIDE ELEMENT, CHROMATIC DISPERSION COMPENSATOR, METHODS FOR DESIGNING CHROMATIC DISPERSION COMPENSATOR, OPTICAL FILTER, METHODS FOR DESIGNING OPTICAL FILTER, OPTICAL RESONATOR AND METHODS FOR DESIGNING OPTICAL RESONATOR - There is provided a planar optical waveguide element comprises a core of an optical waveguide; and first Bragg grating pattern and second Bragg grating pattern that are provided on the core, wherein the first Bragg grating pattern and the second Bragg grating pattern are mutually parallel along a propagation direction of guided light. | 12-30-2010 |
20110013269 | PLANAR OPTICAL WAVEGUIDE ELEMENT, CHROMATIC DISPERSION COMPENSATOR, OPTICAL FILTER, OPTICAL RESONATOR AND METHODS FOR DESIGNING THE ELEMENT, CHROMATIC DISPERSION COMPENSATOR, OPTICAL FILTER AND OPTICAL RESONATOR - 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 (Si | 01-20-2011 |
20110049735 | MANUFACTURING METHOD OF PLANAR OPTICAL WAVEGUIDE DEVICE WITH GRATING STRUCTURE - 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. | 03-03-2011 |
20110053095 | MANUFACTURING METHOD OF PLANAR OPTICAL WAVEGUIDE DEVICE WITH GRATING STRUCTURE - A method for manufacturing a planar optical waveguide device including a core of which a top face is provided with a groove section filled with a groove section filler made of a low refractive index material having a refractive index lower than that of the core, the method including; a first high refractive index material layer forming step of forming a high refractive index material layer; a low refractive index material layer forming step of forming a low refractive index material layer made of the low refractive index material on the high refractive index material layer; a groove section filler forming step of forming the groove section filler by trimming both lateral portions of the low refractive index material layer; and a second high refractive index material layer forming step of forming a high refractive index material layer so as to fill the both sides of the lateral portions of the groove section filler. | 03-03-2011 |
20120119966 | DIPOLE ANTENNA - A dipole antenna of the present invention is more compact and has a wider bandwidth as compared with a conventional dipole antenna. A dipole antenna (DP) includes antenna elements (E | 05-17-2012 |
20120163801 | OPTICAL FIBER COMMUNICATION SYSTEM - 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. | 06-28-2012 |
20120195563 | MULTICORE FIBER - The multicore fiber comprises 7 or more cores, wherein diameters of the adjacent cores differ from one another, wherein each of the cores performs single-mode propagation, wherein a relative refractive index difference of each of the cores is less than 1.4%, wherein a distance between the adjacent cores is less than 50 μm, wherein, in a case where a transmission wavelength of each of the cores is λ, the distance between the adjacent cores is | 08-02-2012 |
20120229344 | ANTENNA DEVICE - An antenna device ( | 09-13-2012 |
20120268332 | ANTENNA DEVICE AND ANTENNA SYSTEM - An antenna element ( | 10-25-2012 |
20130129293 | PLANAR OPTICAL WAVEGUIDE ELEMENT, CHROMATIC DISPERSION COMPENSATOR, OPTICAL FILTER, OPTICAL RESONATOR AND METHODS FOR DESIGNING THE ELEMENT, CHROMATIC DISPERSION COMPENSATOR, OPTICAL FILTER AND OPTICAL RESONATOR - 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. | 05-23-2013 |
20130183440 | OPTICAL WAVEGUIDE-TYPE WAVELENGTH DISPERSION COMPENSATION DEVICE AND MANUFACTURING METHOD THEREOF - The optical waveguide-type wavelength dispersion compensation device of the present invention has an optical waveguide as a reflection-type wavelength dispersion compensation device. The equivalent refractive index of a core changes unevenly along a light propagation direction by changing physical dimensions of the core that is embedded in. a cladding. The core is designed by (a) setting a first desired reflection spectrum, ignoring transmission losses of the optical waveguide, and designing an optical waveguide that is capable of compensating the wavelength dispersion of an optical fiber to be compensated; (b) deriving a wavelength dependency characteristic of a transmission loss amount of the optical waveguide from an effective length of the optical waveguide designed in process (a); and (c) adding a reverse dependency characteristic of the wavelength dependency characteristic to the first reflection spectrum to correct it to a second reflection spectrum, and redesigning an equivalent refractive index distribution of the optical waveguide designed in the process (a) by using this second reflection spectrum. | 07-18-2013 |
20130249748 | ANTENNA DEVICE, AND MOVING BODY EQUIPPED WITH ANTENNA DEVICE - 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. | 09-26-2013 |
20130249749 | ANTENNA INTEGRATED HARNESS - 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. | 09-26-2013 |
20140132471 | ANTENNA DEVICE AND ANTENNA MOUNTING METHOD - An antenna device ( | 05-15-2014 |
20140132474 | ANTENNA - An antenna ( | 05-15-2014 |
20140176391 | ANTENNA DEVICE AND ANTENNA MOUNTING METHOD - An antenna device ( | 06-26-2014 |
20140354500 | DIPOLE ANTENNA - 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. | 12-04-2014 |
20140354509 | LOOP ANTENNA - 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. | 12-04-2014 |