Abstract: A high-frequency module includes a first board on which an electronic device is mounted, a second board on which at least wiring is formed, and a radio-wave absorber disposed between the first board and the second board. Multiple slits are formed in the radio-wave absorber.

Abstract: A radio-frequency module includes a semiconductor device, a first signal line configured to transmit an electrical signal to the semiconductor device, a ground electrode, and a first discharge unit situated between the first signal line and the ground electrode, wherein the first discharge unit includes a first projection formed on the ground electrode and a second projection formed on the first signal line, and the first projection and the second projection are situated opposite each other, with a predetermined distance therebetween, and wherein when an effective wavelength of the transmitted electrical signal is denoted as ?g, and a length of the first projection is denoted as L, ?g and L are related as: 0<(L/?g)?0.1.

Abstract: A semiconductor module includes a first circuit board, a second circuit board, a first semiconductor device mounted on a first surface of the first circuit board, a second semiconductor device mounted on the second circuit board, and a radio wave absorber disposed between the first circuit board and the second circuit board.

Abstract: A flexible printed circuit board for coupling to a connector having a plurality of contacts includes a flexible film, a plurality of electrodes disposed on at least one face of the film and configured to come in contact with the contacts of the connector, and one or more slits formed in the film between adjacent electrodes among the plurality of electrodes.

Abstract: A high-frequency module includes a first board on which an electronic device is mounted, a second board on which at least wiring is formed, and a radio-wave absorber disposed between the first board and the second board. Multiple slits are formed in the radio-wave absorber.

Abstract: An optical module includes a board, a light emitter disposed on the board, a light receiver disposed on the board, and at least one radio-wave absorber disposed between the light emitter and the light receiver.

Abstract: A flexible printed circuit board for coupling to a connector having a plurality of contacts includes a flexible film, a plurality of electrodes disposed on at least one face of the film and configured to come in contact with the contacts of the connector, and one or more slits formed in the film between adjacent electrodes among the plurality of electrodes.

Abstract: An optical module for connecting a photoelectric conversion device on a substrate to a ferrule connected to an optical fiber includes a body configured to be mounted on the substrate, a first lens disposed on the body at a side thereof connectable to the ferrule, a second lens disposed on the body at a side thereof facing the substrate, and a core disposed in the body between the first lens and the second lens, wherein a refractive index of the core is higher than a refractive index of the body.

Abstract: An optical module for connecting photoelectric conversion device on a substrate to a ferrule connected to an optical fiber includes a body configured to be mounted on the substrate, a first lens disposed on the body at a side thereof connectable to the ferrule, a second lens disposed on the body at a side thereof facing the substrate, and a core disposed in the body between the first lens and the second lens, wherein a refractive index of the core is higher than a refractive index of the body.

Abstract: An optical module includes a light-emitting element, an optical waveguide configured to transmit light emitted by the light-emitting element, a temperature sensor, a housing that houses the light-emitting element and the temperature sensor, a first radiator disposed between the light-emitting element and the housing, and a second radiator disposed between the temperature sensor and the housing.

Abstract: An optical module includes a board; a photoelectric transducer disposed on the board; an optical waveguide that is connected to the board and transmits light entering or emitted from the photoelectric transducer; an optical connector including a first end connected to the optical waveguide and a second end to be connected to an optical cable; a housing that houses the board, the photoelectric transducer, the optical waveguide, and the optical connector; and a conductive part that is provided between the optical waveguide and the housing, in contact with the housing, and formed of an elastic conductive material or a radio absorbing material.

Abstract: An optical connector includes a board including an element that performs conversion between an electric signal and light, a first ferrule and a second ferrule that are butted against each other, an optical waveguide that optically connects the first ferrule with the element, and a guide that guides the optical waveguide disposed between the first ferrule and the element.

Abstract: An optical module for connecting a photoelectric conversion device on a substrate to a ferrule connected to an optical fiber includes a body configured to be mounted on the substrate, a first lens disposed on the body at a side thereof connectable to the ferrule, a second lens disposed on the body at a side thereof facing the substrate, and a core disposed in the body between the first lens and the second lens, wherein a refractive index of the core is higher than a refractive index of the body.

Abstract: An optical module for connecting photoelectric conversion device on a substrate to a ferrule connected to an optical fiber includes a body configured to be mounted on the substrate, a first lens disposed on the body at a side thereof connectable to the ferrule, a second lens disposed on the body at a side thereof facing the substrate, and a core disposed in the body between the first lens and the second lens, wherein a refractive index of the core is higher than a refractive index of the body.

Abstract: An optical module includes a board; a photoelectric transducer disposed on the board; an optical waveguide that is connected to the board and transmits light entering or emitted from the photoelectric transducer; an optical connector including a first end connected to the optical waveguide and a second end to be connected to an optical cable; a housing that houses the board, the photoelectric transducer, the optical waveguide, and the optical connector; and a conductive part that is provided between the optical waveguide and the housing, in contact with the housing, and formed of an elastic conductive material or a radio absorbing material.

Abstract: An optical waveguide module includes an optical waveguide sheet including multiple optical waveguides, and a light-emitting device and a light-receiving device each positioned over a surface of the optical waveguide sheet. At least one of the optical waveguides includes a first mirror, a second mirror, and a slit. The first mirror is configured to reflect light entering the corresponding optical waveguide from its first end to the light-receiving device or to reflect light emitted from the light-emitting device toward the first end of the corresponding optical waveguide. The second mirror is configured to reflect light entering the corresponding optical waveguide from its second end toward the surface of the optical waveguide sheet. The slit is provided between the second mirror and the second end of the corresponding optical waveguide. The corresponding optical waveguide is discontinuous across the slit.

Abstract: An optical module for connecting a photoelectric conversion device on a substrate to a ferrule connected to an optical fiber includes a body configured to be mounted on the substrate, a first lens disposed on the body at a side thereof connectable to the ferrule, a second lens disposed on the body at a side thereof facing the substrate, and a core disposed in the body between the first lens and the second lens, wherein a refractive index of the core is higher than a refractive index of the body.

Abstract: An optical waveguide module includes an optical waveguide sheet including multiple optical waveguides, and a light-emitting device and a light-receiving device each positioned over a surface of the optical waveguide sheet. At least one of the optical waveguides includes a first mirror, a second mirror, and a slit. The first mirror is configured to reflect light entering the corresponding optical waveguide from its first end to the light-receiving device or to reflect light emitted from the light-emitting device toward the first end of the corresponding optical waveguide. The second mirror is configured to reflect light entering the corresponding optical waveguide from its second end toward the surface of the optical waveguide sheet. The slit is provided between the second mirror and the second end of the corresponding optical waveguide. The corresponding optical waveguide is discontinuous across the slit.

Abstract: An optical connector includes a board including an element that performs conversion between an electric signal and light, a first ferrule and a second ferrule that are butted against each other, an optical waveguide that optically connects the first ferrule with the element, and a guide that guides the optical waveguide disposed between the first ferrule and the element.

Abstract: An optical waveguide module includes an optical waveguide sheet including multiple optical waveguides, and a light-emitting device and a light-receiving device each positioned over a surface of the optical waveguide sheet. At least one of the optical waveguides includes a first mirror, a second mirror, and a slit. The first mirror is configured to reflect light entering the corresponding optical waveguide from its first end to the light-receiving device or to reflect light emitted from the light-emitting device toward the first end of the corresponding optical waveguide. The second mirror is configured to reflect light entering the corresponding optical waveguide from its second end toward the surface of the optical waveguide sheet. The slit is provided between the second mirror and the second end of the corresponding optical waveguide. The corresponding optical waveguide is discontinuous across the slit.