Patent application number | Description | Published |
20080196929 | Optical transmitter module - An optical transmitter module is described. The optical transmitter module includes a lead pin for electrically connecting the inside and outside of a housing, and a flexible printed circuit board connected to the lead pin. The flexible printed circuit board has a signal pattern and two ground conductor patterns to be connected to an optical modulation element, a laser terminal pattern to be connected to a semiconductor laser, a Peltier terminal pattern to be connected to a Peltier element, and two covering conductive layers in addition to a layer on which such patterns are formed. The covering conductive layers cover all the patterns except for the signal pattern. | 08-21-2008 |
20090161329 | SEMICONDUCTOR DEVICE - In a semiconductor device such as a high-frequency power amplifier module, a plurality of amplifying means are formed on a semiconductor chip which is mounted on a main surface of a wiring substrate, and electrodes of the semiconductor chip are electrically connected by wires to electrodes of the wiring substrate. In order to make the high-frequency power amplifier module small in size, a substrate-side bonding electrode electrically connected to a wire set at a fixed reference electric potential is place at a location farther from a side of the semiconductor chip than a substrate-side output electrode electrically connected to an output wire. A substrate-side input electrode electrically connected to an input wire is located at a distance from the side of the semiconductor chip about equal to the distance from the side of the semiconductor chip to the substrate-side output electrode, or at a location farther from the side of the semiconductor chip than the substrate-side bonding electrode is. | 06-25-2009 |
20090243946 | HIGH FREQUENCY WAVE GLASS ANTENNA FOR AN AUTOMOBILE AND WINDOW GLASS SHEET FOR AN AUTOMOBILE WITH THE SAME - A high frequency wave glass antenna for an automobile includes an antenna conductor formed in a loop shape and disposed in or an automobile window glass sheet, the antenna conductor having a discontinuity and feeding portions at both ends of the discontinuity or in the vicinity of said both ends, the discontinuity being formed of a portion of the loop shape cut by a length. The antenna conductor includes a detour in a portion of the loop shape, the detour being formed of a single or a plurality of detour elements, the detour being disposed in a position, which satisfies that a rate of a distance from a center of the discontinuity of the original loop shape to a center of the detour of the original loop shape with respect to a length of an inner peripheral edge or an outer peripheral edge of the original loop shape ranges from 0.18 to 0.4. | 10-01-2009 |
20090263140 | OPTICAL COMMUNICATION MODULE AND FLEXIBLE PRINTED CIRCUIT BOARD - A flexible printed circuit board includes: a signal wiring pattern including: a transmission line for connecting an end of an optical device with an end of a signal generation circuit; and another transmission line for connecting another end of the optical device with another end of the signal generation circuit; a thin film resistor layer formed in a region including a region facing the signal wiring pattern so as to constitute a first microstrip line together with each of the transmission lines; a ground conductor formed in a region except a part of a region facing the thin film resistor layer within a region including a region facing the signal wiring pattern so as to constitute a second microstrip line together with each of the transmission lines; and an insulating layer formed between each two of the signal wiring pattern, the thin film resistor layer, and the ground conductor. | 10-22-2009 |
20100124423 | PRINTED CIRCUIT BOARD AND OPTICAL TRANSMISSION DEVICE - To reduce emission of an unintentional electromagnetic wave even if a frequency of a clock signal being output is high, a printed circuit board ( | 05-20-2010 |
20100231304 | SEMICONDUCTOR DEVICE - In a semiconductor device such as a high-frequency power amplifier module, a plurality of amplifying means are formed on a semiconductor chip which is mounted on a main surface of a wiring substrate, and electrodes of the semiconductor chip are electrically connected by wires to electrodes of the wiring substrate. In order to make the high-frequency power amplifier module small in size, a substrate-side bonding electrode electrically connected to a wire set at a fixed reference electric potential is place at a location farther from a side of the semiconductor chip than a substrate-side output electrode electrically connected to an output wire. A substrate-side input electrode electrically connected to an input wire is located at a distance from the side of the semiconductor chip about equal to the distance from the side of the semiconductor chip to the substrate-side output electrode, or at a location farther from the side of the semiconductor chip than the substrate-side bonding electrode is. | 09-16-2010 |
20100232806 | OPTICAL TRANSMITTER DEVICE AND OPTICAL TRANSMITTER MODULE - Provided are an optical transmitter device and an optical transmitter module which are capable of reducing the optical transmitter module size while maintaining a state where an excellent optical transmission waveform quality is obtained over a wide range of frequencies. The optical transmission module ( | 09-16-2010 |
20110188108 | OPTICAL MODULE - To achieve a size-reduction of an optical module having a circuit that generates a high-frequency clock signal for controlling optical modulation by an optical modulator and to suppress radiation of electromagnetic waves from the optical module. A through-hole via is formed on a multilayer printed circuit board so as to be insulated from a plurality of grounded wiring layers by an anti-pad. A coaxial connector and an intensity modulation control IC that generates a high-frequency clock signal are provided on the multilayer printed circuit board. The high-frequency clock signal is input to the coaxial connector through a micro-strip line formed on the multilayer printed circuit board. An open stub connected to the through-hole via is provided on a wiring layer between a first wiring layer and a second wiring layer among the plurality of wiring layers. | 08-04-2011 |
20120154229 | WINDOWPANE FOR VEHICLE AND ANTENNA - A vehicle window glass has a glass plate, a conductive film laminated on the glass plate and an antenna structured with a feeding structure placed on the conductive film, and is characterized in that the feeding structure has a dielectric and a pair of electrodes, that the conductive film has a slot one end of which makes an upper edge of the conductive film an open end, and is disposed between the glass plate and the dielectric, and that the pair of electrodes are disposed on the opposite side of the side of the conductive film with the dielectric in between so that the slot is sandwiched between the pair of electrodes when the pair of electrodes are projected onto the conductive film, and are capacitively coupled to the conductive film. | 06-21-2012 |
20120229998 | DIFFERENTIAL TRANSMISSION CIRCUIT, OPTICAL MODULE, AND INFORMATION PROCESSING SYSTEM - A differential transmission circuit includes a pair of transmission line conductors and a ground conductor layer, wherein the pair of transmission line conductors include a first straight line region where both the pair of transmission line conductors extend in parallel to each other in a first direction with a first width in a first layer, a first cross region where one of the pair of transmission line conductors is formed in the first layer, the other thereof is formed in a second layer, and the pair of transmission line conductors cross the each other in a three-dimensional manner, the first cross region being disposed on the front side of the first straight line region, and wherein each of the widths of the pair of transmission line conductors in the first cross region is smaller than the first width. | 09-13-2012 |
20130163996 | Printed Circuit Board and Optical Transmission Device - A printed circuit board includes a substrate, a signal output circuit formed on the substrate for outputting a clock signal, a shield for covering the signal output circuit, a power supply wiring for connecting the signal output circuit and a power source, and a trap filter provided to the power supply wiring and provided inside the shield, for attenuating a frequency component corresponding to a frequency of clock signal. The trap filter includes a resonance circuit having one portion of the power supply wiring, an inner-layer wiring of the substrate located below the one portion of the power supply wiring, an inner-layer ground wiring of the substrate located below the inner-layer wiring, and a via hole for connecting the one portion of the power supply wiring and the inner-layer wiring. | 06-27-2013 |
20130257664 | WINDOW GLASS FOR VEHICLE AND ANTENNA - Window glass for vehicle may include an antenna conductor having electrodes provided on a surface of a dielectric on a side opposite from a conductive film. The conductive film may include a slot with a first end part that opens at a peripheral edge part of the conductive film. The antenna conductor may include a loop-shaped antenna element which electrodes serve as a feeding point, and projections of the electrodes onto a glass plate are located at positions not overlapping the conductive film, and a projection of the loop-shaped antenna element onto the glass plate forms a crossover part that crosses the slot. | 10-03-2013 |
20130285861 | ANTENNA APPARATUS - An antenna apparatus includes a glass plate that is fixed to a flange of a vehicle body at a window opening portion of the vehicle body; a dielectric material; a conductive film provided between the glass plate and the dielectric material; and a monopolar feeding portion provided on the dielectric material at a surface opposite to a glass plate side and at a position capable of being capacitively coupled to the conductive film, the antenna apparatus being configured such that a clearance between an end portion of the flange of the vehicle body and an outer edge of the conductive film functions as a slot antenna, the conductive film being provided with a notch having one end as an open end at the outer edge of the conductive film in the vicinity of the feeding portion. | 10-31-2013 |
20140022734 | OPTICAL MODULE - An optical module includes: an optical receiving module | 01-23-2014 |
20140133108 | DIFFERENTIAL TRANSMISSION CIRCUIT, OPTICAL MODULE, AND INFORMATION PROCESSING SYSTEM - A differential transmission circuit includes a pair of transmission line conductors and a ground conductor layer, wherein the pair of transmission line conductors include a first straight line region where both the pair of transmission line conductors extend in parallel to each other in a first direction with a first width in a first layer, a first cross region where one of the pair of transmission line conductors is formed in the first layer, the other thereof is formed in a second layer, and the pair of transmission line conductors cross the each other in a three-dimensional manner, the first cross region being disposed on the front side of the first straight line region, and wherein each of the widths of the pair of transmission line conductors in the first cross region is smaller than the first width. | 05-15-2014 |