Abstract: A module and system are provided for reducing or suppressing ringing occurring in a digital signal to be transmitted. A transmission module Ma includes a transmitter 200a configured to transmit a digital signal, a transmission antenna 100a constituted by a metal plate, or by a conductor formed on an insulator, the transmission antenna 100a being configured to be electromagnetically or magnetically coupled to a reception antenna 100b of a non-contact reception module Mb for digital communication, and a resistor 400a connected in series between the transmitter 200a and the transmission antenna 100a. The resistor 400a has such a resistance value that the resistor 400a entirely blunts a waveform of the digital signal outputted from the transmitter 200a so as to reduce or suppress ringing occurring in the digital signal. The blunted digital signal is to be inputted into the transmission antenna 100a.

Abstract: The coil component includes a coil, a first core having a first magnetic permeability, and a second core having a second magnetic permeability lower than the first magnetic permeability. The first core and the second core form a magnetic path. The coil forms two or more winding windows. The first core contacts with an entirety of one side line extending in a second direction of each of the winding windows, and protrudes from both ends of one side line of at least one of the winding windows. The second core contacts with three side lines other than the one side line of each of the winding windows. A surface resistance of the first core between two points that are 20 mm away from each other is not less than 5 ? after a high-temperature storage test. A drive frequency of the coil component is not less than 20 kHz.

Abstract: A connector including a body having an insulating property, at least one terminal, a circuit board fixed to the body, and at least one current sensor mounted on the circuit board. The or each terminal includes a distal portion, an externally connectable lead portion, and a body portion therebetween. The distal portion protrudes from the body to one side in the first direction or is exposed from the body. The body portion is at least partly held by the body, and includes a measurement target extending in first and second directions and being disposed inside the body. The circuit board is spaced from the measurement target or targets of the at least one terminal in a third direction. The or each current sensor is disposed near the or a corresponding measurement target and configured to perform a non-contact detection of a current flowing through the or a corresponding terminal.

Abstract: A lens including a lens body and a support. The lens body includes at least one lens portion and at least one holding hole for holding at least one optical fiber. A central axis of the or each holding hole is positioned on a phantom line extending through an optical axis of the or a corresponding lens portion. The support includes a support body fixed to the lens body. With a first portion of the or each optical fiber securely received in the or a corresponding holding hole, a bottom face of the or each holding hole abuts an end face of the first portion of the or a corresponding optical fiber, a peripheral face of the or each holding hole partly abuts an outer peripheral face of the first portion of the or a corresponding optical fiber, and the support body supports a second portion of the or each optical fiber.

Abstract: A polycrystal having a physical property that enables an AC resistance value to drop sharply is used to reduce transmission loss of a high frequency signal being transmitted. A high frequency transmission device D1 is provided that includes a dielectric 100 and a transmission line 200 adapted for transmitting therethrough high frequency signals. At least part of the transmission line 200 is located on or inside the dielectric 100. At least part of the transmission line 200 is composed of a polycrystal composed of conductor fine particles. The polycrystal has a physical property such that, when a high frequency signal to be transmitted through the transmission line 200 is of frequencies within one or more specific frequency bands, the AC resistance value drops sharply.

Abstract: The shield member includes a plurality of first elastic portions made of a conductive material and arranged annularly in a plate shape at an inner circumferential part of the shield member; a plurality of second elastic portions arranged annularly at an outer circumferential part of the shield member; and an intermediate portion between the plurality of first elastic portions and the plurality of second elastic portions. The plurality of first elastic portions are defined by a plurality of first slits each extending from an inner circumferential edge of the shield member in a radial direction of the shield member. The plurality of second elastic portions are defined by a plurality of second slits each extending from an outer circumferential edge of the shield member in the radial direction.

Abstract: The invention provides a shield shell that allows easy insertion of a circuit board or other insulator into the shield shell. A shield shell 300 includes a shell body 310 and first and second position restrictors 320a and 320b. The first position restrictor 320a is provided at an edge portion 315 of an insertion port 310 of the shell body 310 and is located inside the insertion port 315. The second position restrictor 320b is provided in the shell body 310 so as to oppose the first position restrictor 320b with a spacing in a Z-Z? direction. A distance in the Z-Z? direction from the first position restrictor 320a to the second position restrictor 320b is substantially equal to, or slightly larger than, a distance in the Z-Z? direction from a first face 101 to a second face 102 of a circuit board 100.

Abstract: A polycrystal having a physical property that enables an AC resistance value to drop sharply is used to reduce transmission loss of a high frequency signal being transmitted. A high frequency transmission device D1 is provided that includes a dielectric 100 and a transmission line 200 adapted for transmitting therethrough high frequency signals. At least part of the transmission line 200 is located on or inside the dielectric 100. At least part of the transmission line 200 is composed of a polycrystal composed of conductor fine particles. The polycrystal has a physical property such that, when a high frequency signal to be transmitted through the transmission line 200 is of frequencies within one or more specific frequency bands, the AC resistance value drops sharply.

Abstract: Provided are a shield member, a shield unit, and a connector module each of which allows easy alignment with a connection target instrument. The shield member includes a plurality of first elastic portions made of a conductive material and arranged annularly in a plate shape at an inner circumferential part of the shield member; a plurality of second elastic portions arranged annularly at an outer circumferential part of the shield member; and an intermediate portion between the plurality of first elastic portions and the plurality of second elastic portions. The plurality of first elastic portions are defined by a plurality of first slits each extending from an inner circumferential edge of the shield member in a radial direction of the shield member. The plurality of second elastic portions are defined by a plurality of second slits each extending from an outer circumferential edge of the shield member in the radial direction.

Abstract: A module and system are provided for reducing or suppressing ringing occurring in a digital signal to be transmitted. A transmission module Ma includes a transmitter 200a configured to transmit a digital signal, a transmission antenna 100a constituted by a metal plate, or by a conductor formed on an insulator, the transmission antenna 100a being configured to be electromagnetically or magnetically coupled to a reception antenna 100b of a non-contact reception module Mb for digital communication, and a resistor 400a connected in series between the transmitter 200a and the transmission antenna 100a. The resistor 400a has such a resistance value that the resistor 400a entirely blunts a waveform of the digital signal outputted from the transmitter 200a so as to reduce or suppress ringing occurring in the digital signal. The blunted digital signal is to be inputted into the transmission antenna 100a.

Abstract: A contactless communication module with improved communication accuracy is provided. A module M1 includes a base 100, an antenna 200, a semiconductor component 300, an internal connection 400, and an external connection 500. A partner communication device can be disposed at a short distance from, and on the Z-direction side relative to, the base 100. The antenna 200 is provided at the base 100, at a first height position such as to be able to contactlessly communicate with the partner communication device. The semiconductor component 300 is provided at the base 100, at the first height position or a second height position. The second height position is located on the Z?-direction side relative to the first height position. The internal connection 400 electrically connects the antenna 200 and the semiconductor component 300. The first portion 510 of the external connection 500 is provided at the base 100 and electrically connected to the semiconductor component 300.

Abstract: Ringing occurring in a digital signal to be transmitted, is reduced or suppressed. A transmission module Ma includes a transmitter 200a configured to transmit a digital signal, a transmission antenna 100a constituted by a metal plate, or by a conductor formed on an insulator. The transmission antenna 100a is configured to be electromagnetically or magnetically coupled to a reception antenna 100b of a non-contact reception module Mb for digital communication. A resistor 400a is connected in series between the transmitter 200a and the transmission antenna 100a. The resistor 400a has such a resistance value that the resistor 400a entirely blunts a waveform of the digital signal outputted from the transmitter 200a so as to reduce or suppress ringing occurring in the digital signal. The blunted digital signal can be inputted into the transmission antenna 100a.

Abstract: The invention provides a shield shell that allows easy insertion of a circuit board or other insulator into the shield shell. A shield shell 300 includes a shell body 310 and first and second position restrictors 320a and 320b. The first position restrictor 320a is provided at an edge portion 315 of an insertion port 310 of the shell body 310 and is located inside the insertion port 315. The second position restrictor 320b is provided in the shell body 310 so as to oppose the first position restrictor 320b with a spacing in a Z-Z? direction. A distance in the Z-Z? direction from the first position restrictor 320a to the second position restrictor 320b is substantially equal to, or slightly larger than, a distance in the Z-Z? direction from a first face 101 to a second face 102 of a circuit board 100.

Abstract: A male connector includes a male body, a male communication antenna, and a first male circuit board. The male communication antenna is provided inside the male body and is configured to wirelessly communicate a signal. The first male circuit board is electrically connected to the male communication antenna. The invention also provides a female connector including a female body, a female communication antenna, and a first female circuit board. The female communication antenna is provided inside the female body and configured to wirelessly communicate a signal. The first female circuit board is electrically connected to the female communication antenna.

Abstract: A connector assembly including a case, a second connector, and a sealing member. The case is combinable with a circuit board on which a first connector is mounted. The case and the circuit board are adapted to define a space. The second connector passes through the case in a direction substantially perpendicular to the circuit board. The second connector is connectable to the first connector within the space and includes an accommodatable portion to be disposed within the space. The sealing member has a tuboid shape, extends in the direction, and includes first and second portions respectively on one and the other sides in the direction. The first portion fits around the accommodatable portion of the second connector. The second portion is positioned on the other side in the direction relative to the accommodatable portion of the second connector and adapted to abut the circuit board and cover the first connector.

Abstract: A connector including a shield case, a body housed in the shield case, at least one terminal held by the body, and a shield cover. The shield case includes a tube extending in a first direction and a pair of walls. The walls are located on one side in the first direction relative to the tube, face each other in a second direction orthogonal to the first direction, and extend to one side in a third direction. The third direction crosses the first and second directions. The body includes a first portion in the tube, and a second portion. The first portion includes a basal portion, which includes an exposed portion exposed to one side in the third direction between the walls. The second portion extends between the walls from the basal portion. The shield cover includes a cover portion disposed between the walls to cover at least part of the exposed portion.

Abstract: A connector including a shield case, a body housed in the shield case, at least one terminal held by the body, and a shield cover. The shield case includes a tube extending in a first direction and a pair of walls. The walls are located on one side in the first direction relative to the tube, face each other in a second direction orthogonal to the first direction, and extend to one side in a third direction. The third direction crosses the first and second directions. The body includes a first portion in the tube, and a second portion. The first portion includes a basal portion, which includes an exposed portion exposed to one side in the third direction between the walls. The second portion extends between the walls from the basal portion. The shield cover includes a cover portion disposed between the walls to cover at least part of the exposed portion.

Abstract: A multilayer printed wiring board including insulating layers, ground layers thereon, and at least one via hole. The ground layers include a wiring layer and a first impedance adjustment layer. The wiring layer includes a solid conductor and a conductive line. The conductive line is disposed inside an opening and a passage of the solid conductor. The first impedance adjustment layer includes a solid conductor having an opening. The via hole is located inside the openings of the wiring layer and the first impedance adjustment layer and is connected to the conductive line. A first distance is smaller than a second distance, where the first distance is a distance from an outline of the opening of the wiring layer to the via hole, and the second distance is a distance from an outline of the opening of the first impedance adjustment layer to the via hole.

Abstract: A connector including a shell, an inner body inside the shell, a terminal held by the inner body and disposed inside the shell, a ground terminal, and an outer body. The outer body includes a generally tubular first portion extending in a first direction, a second portion, and an accommodation space in the first and second portions securely accommodating the shell. The second portion is larger than the first portion in outer cross-sectional dimensions and/or wall thickness in the second direction orthogonal to the first direction. The second portion has a hole extending from an outer face of the second portion to the accommodation space. The ground terminal is in contact with, or contiguous with, the shell and is disposed in the hole of the outer body. The ground terminal includes a portion exposed from the outer body or partly located outside the outer body.