Abstract: A wire-wound core includes a wound core portion and a first flange and a second flange provided on a first end portion and a second end portion, respectively. The first flange has a bottom surface facing a mounting substrate during mounting, a top surface facing away from the bottom surface, an inner end surface coupling the bottom surface with the top surface and facing the wound core portion, an outer end surface facing away from the inner end surface, and a first side surface and a second side surface that face away from each other and each couple the bottom surface with the top surface and the inner end surface with the outer end surface. In a region of the outer end surface close to the bottom surface, a first inclined surface inclined toward the inner end surface as the first inclined surface approaches the bottom surface is provided.

Abstract: A coil component includes a core including a winding core portion, and first and second flange portions at first and second ends, respectively, of the winding core portion. The coil component also includes first and second terminal electrodes on the first and second flange portions, respectively, and a wire wound around the winding core portion and including first and second end portions respectively connected to the first and second terminal electrodes. The first terminal electrode is at least on a first surface of the first flange portion. The first end portion of the wire is embedded in the first terminal electrode such that a part of the first end portion is exposed. The first terminal electrode includes a metal layer in which the first end portion is embedded and an alloy layer at least in a portion of a region between the metal layer and the first end portion.

Abstract: A coil component includes a core, and projection is on a lower main surface of a top plate and a recess for receiving the projection is in a top surface of a flange portion in the core. The projection has a frustoconical shape, for example, and the cavity formed by the recess has a conical inner peripheral surface. An outer surface of the projection and a wall surface that defines the recess form guide surfaces which guide the projection into the recess and form first and second abutment portions, respectively, that are brought into abutment against each other. The abutment between the first and second abutment portions defines the termination end of the projection inserted into the recess with a gap between the lower main surface of the top plate and the top surface of the flange portion and aligns the top plate relative to the core.

Abstract: Bonding strength between a core and a top plate is increased in a coil component. Surface roughnesses of a top surface of a flange portion of the core and a lower main surface of the top plate are different. For example, the surface roughness of the lower main surface is smaller than the surface roughness of the top surface. A protrusion protruding from the lower main surface having smaller surface roughness and in contact with the top surface of the flange portion of the core is in a region where the lower main surface of the top plate and the top surface of the flange portion of the core face each other with an adhesive interposed therebetween. The protrusion can increase a surface area of a bonding surface of the top plate having smaller surface roughness, and provide an anchor effect of the adhesive on the top plate.

Abstract: A coil component having a first flange portion connected to a first end of a winding core portion on a first positive direction side, a second flange portion connected to a second end of the winding core portion on a first negative direction side, and a top plate extending through a longer range in a direction along a center axis than the winding core portion and connected to the first and second flange portions via an adhesive which does not contact the winding core portion. A first presence area is where the adhesive is on a surface of the top plate. A second presence area consists of a second area where the adhesive is on a surface of the first flange portion and a fourth area where the adhesive is on a surface of the second flange portion. The first presence area is larger than the second presence area.

Abstract: In a coil component, a first end of a wire is connected to a first terminal electrode. Part of the wire extends in a spiral shape around a peripheral surface of a winding core portion with a center axis as an axis of helix. A region of the wire from a first point at which the wire is connected to the first terminal electrode to a second point at which the wire has been wound through one turn around the center axis is referred to as a first wire range. Within the first wire range, the wire has a first connection point at which the wire is connected to a top plate via adhesive. The wire is separated from the peripheral surface of the winding core portion at the first connection point.

Abstract: A wire-wound core includes a wound core portion and a first flange and a second flange provided on a first end portion and a second end portion, respectively. The first flange has a bottom surface facing a mounting substrate during mounting, a top surface facing away from the bottom surface, an inner end surface coupling the bottom surface with the top surface and facing the wound core portion, an outer end surface facing away from the inner end surface, and a first side surface and a second side surface that face away from each other and each couple the bottom surface with the top surface and the inner end surface with the outer end surface. In a region of the outer end surface close to the bottom surface, a first inclined surface inclined toward the inner end surface as the first inclined surface approaches the bottom surface is provided.

Abstract: A transmission line includes three wires formed on a substrate. Each of the transmission lines transmits a three-level signal. A common-mode choke coil is inserted into the transmission line. The common-mode choke coil includes three coils coupled to one another and three pairs of outer electrodes, each of the three pairs being connected to the corresponding two ends of the coils. The outer electrodes of the common-mode choke coil are connected to the transmission line such that the three coils are serially inserted into the respective three wires.

Abstract: An S-parameter of an object to be measured is measured, which includes (i) three transmission lines configured such that a ternary signal is transmitted through a corresponding one of the three transmission lines and (ii) six ports as total ports included in the three transmission lines each having a pair of ports. Based on the measured S-parameter, a parameter is calculated, which shows transparent characteristics in each mode among mixed-mode S-parameters in accordance with transition patterns of signal levels on the three transmission lines.

Abstract: An electronic apparatus includes a radio communication unit employing a WiGig method and a radio communication unit employing a Wi-Fi method. A bias T circuit is included in the radio communication unit employing the WiGig method. The bias T circuit includes inductors and a filter. The inductors are disposed between a signal line and a DC-DC converter, and are connected in series to each other. The filter has attenuation characteristics in a frequency band used by the radio communication unit employing the Wi-Fi method. One end of the filter is connected between the signal line and one of the inductors located at a first stage from the signal line.

Abstract: Three or more of n inductors are arranged inside an insulating member. Inside the insulating member, each of the inductors includes coil conductors that are contained in respective coil conductor layers that are stacked in a first direction and via conductors, each of which connects the coil conductors that are contained in the coil conductor layers adjoining in the first direction. Each of the coil conductor layers contains the n coil conductors of the inductors, and a pattern formed of the coil conductors contained in each of the coil conductor layers has n-fold rotational symmetry.

Abstract: A power supply circuit includes a plurality of power amplifiers for amplifying radio frequency signals, an envelope tracker for supplying a variable voltage based on an envelope signal to the power amplifiers, a common line connected to an output side of the envelope tracker, and a plurality of branch lines branching from a tip of the common line and connected to the power amplifiers, respectively. On the branch lines, sub-inductors are provided, respectively. On the common line, a main inductor and a capacitor are provided.

Abstract: A power supply circuit includes a plurality of power amplifiers for amplifying radio frequency signals, an envelope tracker for supplying a variable voltage based on an envelope signal to the power amplifiers, a common line connected to an output side of the envelope tracker, and a plurality of branch lines branching from a tip of the common line and connected to the power amplifiers, respectively. On the branch lines, sub-inductors are provided, respectively. On the common line, a main inductor and a capacitor are provided.

Abstract: An electronic apparatus includes a radio communication unit employing a WiGig method and a radio communication unit employing a Wi-Fi method. A bias T circuit is included in the radio communication unit employing the WiGig method. The bias T circuit includes inductors and a filter. The inductors are disposed between a signal line and a DC-DC converter, and are connected in series to each other. The filter has attenuation characteristics in a frequency band used by the radio communication unit employing the Wi-Fi method. One end of the filter is connected between the signal line and one of the inductors located at a first stage from the signal line.

Abstract: Three or more of n inductors are arranged inside an insulating member. Inside the insulating member, each of the inductors includes coil conductors that are contained in respective coil conductor layers that are stacked in a first direction and via conductors, each of which connects the coil conductors that are contained in the coil conductor layers adjoining in the first direction. Each of the coil conductor layers contains the n coil conductors of the inductors, and a pattern formed of the coil conductors contained in each of the coil conductor layers has n-fold rotational symmetry.

Abstract: An S-parameter of an object to be measured is measured, which includes (i) three transmission lines configured such that a ternary signal is transmitted through a corresponding one of the three transmission lines and (ii) six ports as total ports included in the three transmission lines each having a pair of ports. Based on the measured S-parameter, a parameter is calculated, which shows transparent characteristics in each mode among mixed-mode S-parameters in accordance with transition patterns of signal levels on the three transmission lines.

Abstract: A transmission line includes three wires formed on a substrate. Each of the transmission lines transmits a three-level signal. A common-mode choke coil is inserted into the transmission line. The common-mode choke coil includes three coils coupled to one another and three pairs of outer electrodes, each of the three pairs being connected to the corresponding two ends of the coils. The outer electrodes of the common-mode choke coil are connected to the transmission line such that the three coils are serially inserted into the respective three wires.