Tdk Corporation

Yasunori Sakisaka

Noriaki Ootsuka

Takeshi Kijima

Yuta Ashida

Yukitoshi Kagaya

Tetsuzo Goto

Shigemitsu Tomaki

Toshio Sakurai

Kiyoshi Hatanaka

Tomoaki Kawata

A directional coupler includes a first to a fourth port, a main line connecting the first port and the second port, a first and a second subline section configured to be electromagnetically coupled to the main line, and a phase shifter. The first subline section, the phase shifter, and the second subline section are arranged in this order in series between the third port and the fourth port. The phase shifter outputs a signal that is phase-delayed relative to an input signal. The phase delay amount of the output signal of the phase shifter relative to the input signal increases with increasing frequency of the input signal. A frequency twice as high as the frequency of the input signal at which the phase delay amount is 90 degrees is lower than the frequency of the input signal at which the phase delay amount is 180 degrees.

Directional coupler

A directional coupler includes: a main line connecting a first port and a second port; first to third subline sections each of which is formed of a line configured to be electromagnetically coupled to the main line; a first matching section provided between the first subline section and the second subline section; a second matching section provided between the second subline section and the third saline section; and a stack for integrating these components. The stack includes a plurality of dielectric layers and a plurality of conductor layers stacked on each other. Each of the first and second matching sections includes two inductors each formed using one or more of the conductor layers, and a capacitor formed using two or more of the conductor layers.

A directional coupler includes: a first to a fourth port; a main line connecting the first and second ports; a first to a fourth subline section electromagnetically coupled to the main line; a first to a third matching section; and a stack. The first subline, first matching, third subline, third matching, fourth subline, second matching, and second subline sections are arranged in this order between the third and fourth port. The first and second matching sections include an inductor connecting two subline sections located on opposite sides of the matching section. Each of one or more conductor layers used to form the inductor includes two connection portions for electrical connection to respective other elements, and a line portion connecting the two connection portions. The inductor excluding the connection portions does not include potions that overlap each other when viewed in the stacking direction of the stack.

A directional coupler includes: a main line connecting an input port and an output port; first to third subline sections each of which is formed of a line configured to be electromagnetically coupled to the main line; a first matching section provided between the first subline section and the second subline section; and a second matching section provided between the second subline section and the third subline section. The first and second matching sections are configured to cause changes in phase of high frequency signals passing therethrough, and have mutually different characteristics so as to create two attenuation poles in the frequency response of the coupling of the directional coupler.

A dielectric line includes a line portion and a surrounding dielectric portion. The line portion is formed of a first dielectric having a first relative permittivity. The surrounding dielectric portion is formed of a second dielectric having a second relative permittivity. The line portion propagates one or more electromagnetic waves of one or more frequencies within the range of 1 to 10 GHz. In a cross section orthogonal to the direction of propagation of the one or more electromagnetic waves through the line portion, the surrounding dielectric portion is present around the line portion. The first relative permittivity is 1,000 or higher. The second relative permittivity is lower than the first relative permittivity.

Dielectric line and electronic component

A directional coupler includes: a main line connecting an input port and an output port; a first subline section and a second subline section each of which is formed of a line configured to be electromagnetically coupled to the main line; and a matching circuit provided between the first subline section and the second subline section. The matching circuit includes a first path connecting the first subline section and the second subline section, and a second path connecting the first path and the ground. The first path includes a first inductor. The second path includes a first capacitor and a second inductor connected in series.

A layered low-pass filter includes: a layered substrate; an input terminal, an output terminal and a grounding terminal each disposed on a periphery of the layered substrate; first and second inductors connected in series and provided between the input terminal and the output terminal; first to fifth capacitors formed within the layered substrate; a grounding conductor layer provided within the layered substrate; and a conducting portion formed within the layered substrate. The conducting portion includes a conductor layer connected to the grounding terminal, and a conducting path formed of a plurality of through holes. The conducting portion connects the grounding conductor layer to the grounding terminal via a path longer than the shortest distance between the grounding conductor layer and the grounding terminal.

Layered low-pass filter having a conducting portion that connects a grounding conductor layer to a grounding terminal

A layered low-pass filter includes: a first inductor and a second inductor that are connected in series and are located between an input terminal and an output terminal; a first capacitor connected in parallel to the first inductor; a second capacitor connected in parallel to the second inductor; and third to fifth capacitors and third to fifth inductors. The output of the first inductor and the input of the second inductor are connected to the ground via the third capacitor and the third inductor connected in series. The input of the first inductor is connected to the ground via the fourth capacitor and the fourth inductor connected in series. The output of the second inductor is connected to the ground via the fifth capacitor and the fifth inductorconnected in series.

Layered low-pass filter capable of producing a plurality of attenuation poles

A layered low-pass filter includes: a first coil and a second coil that are connected in series and that are located between an input terminal and an output terminal in terms of circuit configuration; and a capacitor located between a ground and a node between the first and second coils in terms of circuit configuration. In terms circuit configuration, the first coil is located closer to the input terminal than is the second coil. Each of the first and second coils has an input and an output. The layered low-pass filter further includes: a first conducting path formed using at least one through hole and used for connecting the capacitor to the output of the first coil; and a second conducting path formed using at least one through hole and used for connecting the capacitor to the input of the second coil.

Growing community of inventors

Tokyo, Japan

Yasunori Sakisaka