Kyocera Corporation

Hiromichi Yoshikawa

Nobuki Hiramatsu

Katsuro Nakamata

Masafumi Horiuchi

Naoki Matsui

Tomoya Sugita

Hiroshi Uchimura

Sunao Hashimoto

Masamichi Yonehara

Hiroshi Ninomiya

Shinji Isoyama

Takanori Kubo

Satoshi Ishikawa

Susumu Kashiwase

Takanori Ikuta

Yasuhiko Fukuoka

Hikaru Nekozuka

Shuichi Yamamoto

Tetsuya Yuda

Katsurou Nakamata

Akira Nakayama

Akio Yamamoto

Tsukasa Tamakita

Soutarou Kukita

An antenna includes a first resonator extending in a first plane direction; a second resonator spaced apart from the first resonator in a first direction and extending in the first plane direction; a third resonator positioned between the first resonator and the second resonator in the first direction and magnetically or capacitively connected to or electrically connected to each of the first resonator and the second resonator; a reference conductor extending in the first plane direction, positioned between the first resonator and the second resonator in the first direction, and serving as a potential reference of the first resonator and the second resonator; and a feeder line connected to the first resonator. The reference conductor surrounds at least a part of the third resonator in the first plane direction.

Antenna and array antenna

An isolator comprises a substrate having a substrate surface; and first and second waveguides that are positioned at least partially side by side along the substrate surface. The first waveguide includes a first core, the second waveguide includes a second core, and the first and second cores are surrounded by a dielectric. The first waveguide includes first and second ends, and includes a port through which an electromagnetic wave is input and output at each of the first and second ends. The second waveguide includes a first portion extending along the first waveguide and a second portion that is not included in the first portion. The second waveguide includes a nonreciprocal member that is in contact with at least a part of the second core of the first portion, and the nonreciprocal member is in contact with at least a part of the second core of the second portion.

Isolator, method of manufacturing isolator, electromagnetic wave transmitter, and light transmitter

It is an object to provide an antenna that improves wireless communication with a plurality of communication devices disposed at different locations. The antenna includes an antenna body, a case including a bottom surface and side surfaces disposed around the bottom surface, the case supporting the antenna body on the bottom surface, the case being formed of metal, and a ceiling portion disposed in such a manner to face the bottom surface of the case, the ceiling portion being in contact with the side surfaces, the ceiling portion being formed of a dielectric body, and a distance between the ceiling portion and the antenna body is shorter than a half of a wavelength of a predetermined frequency serving as a frequency to be used.

Antenna

An antenna includes first and second antenna elements, and first and second coupling bodies. The first and second antenna elements respectively include first and second radiation conductors and first and second feed lines, and respectively resonate in first and second frequency bands. The first and second radiation conductors are arranged side-by-side at an interval equal to or shorter than ½ a resonance wavelength. The first and second radiation conductors are coupled under a first coupling mode in which one of capacitive coupling and magnetic field coupling is dominant. The first coupling body couples first end portions of the first and second radiation conductors under a second coupling mode different from the first coupling mode. The second coupling body couples second end portions of the first and second radiation conductors, opposite to the first end portions, under the second coupling mode.

Antenna, wireless communication module, and wireless communication device

To provide a novel antenna, wireless communication module, and wireless communication device excellent in long-term reliability. The antenna includes a first conductor, a second conductor facing the first conductor in a first direction, a third conductor, a fourth conductor, a power supply line configured to be electromagnetically connected to the third conductor, and a reinforcing member including a dielectric material. The third conductor extends along the first direction, is located between the first conductor and the second conductor, and is configured to capacitively connect the first conductor and the second conductor. The fourth conductor extends along the first direction and is configured to be electrically connected to the first conductor and the second conductor. The reinforcing member is located on at least a portion of any of the first conductor and the second conductor.

An isolator includes a first waveguide with a linear shape and a second waveguide with an annular shape on a substrate including a substrate surface, the first waveguide being positioned along the substrate surface. The first waveguide and the second waveguide each include a core and a cladding. The first waveguide includes a first end, a second end, and a port at each of the first end and the second end for input and output of electromagnetic waves. The core of the second waveguide includes a non-reciprocal member in at least a portion of a cross-section intersecting a direction in which the second waveguide extends.

Isolator, light source apparatus, optical transceiver, optical switch, optical amplifier, and data center

An optical isolatoraccording to the present disclosure includes a substrateand an optical waveguideprovided on the substrate. The optical waveguideincludes a first end part, a plurality of second end partsarranged in an array, and at least one branching partlocated between the first end partand the plurality of second end parts. The optical waveguidehas a portion having non-reciprocity and gives different non-reciprocal phase shift amounts between the first end partand at least two of the second end parts

Optical isolator and light source device

A brake lever and a transmission with a novel antenna are provided. The brake lever is attachable to the handlebar. The brake lever includes a long portion configured as including an electrically conductive material and an antenna located on the long portion. The antenna includes a first conductor, a second conductor facing the first conductor in a first direction, a third conductor, a fourth conductor, and a power supply line configured to be electromagnetically connected to the third conductor. The third conductor is located between the first conductor and the second conductor, is configured to capacitively connect the first conductor and the second conductor, and extends in the first direction. The fourth conductor is connected to the first conductor and the second conductor and extends in the first direction. The fourth conductor faces the long portion.

Brake lever and transmission

An antenna includes a housing, a first conductor group, and a power supply line. The housing includes a first surface including at least three first corner portions, a second surface including at least three second corner portions and facing the first surface, and a side surface connecting the first and second surfaces. A housing portion is surrounded by the first, second and side surfaces. The first conductor group includes a first conductor extending along the first surface, at least three second conductors separated from one another, and a second conductor group. The second conductors extend along the side surface from the first corner portions to the second corner portions and are electrically connected to the first conductor. The second conductor group extends along the second surface and capacitively couples the at least three second conductors. The power supply line is connected to any one portion of the second conductor group.

The present disclosure provides a novel antenna. An antenna according to an example of a plurality of embodiments of the present disclosure includes a radiation conductor, a ground conductor, a first feeding line, a second feeding line, and a connecting conductor. The first feeding line is electromagnetically connected to the radiation conductor and configured to excite the radiation conductor in a first direction. The second feeding line is electromagnetically connected to the radiation conductor and configured to excite the radiation conductor in a second direction. The connecting conductor is positioned apart from the center of the radiation conductor. The connecting conductor is spaced apart from the first feeding line by a first distance. The connecting conductor is spaced apart from the second feeding line by a second distance. The first distance is substantially equal to the second distance.

Antenna, array antenna, wireless communication module, and wireless communication device

An isolator includes a first core, a second core, a nonreciprocal member, and a magnetic body. The first core and the second core extend in a first direction and are positioned side by side with a cladding therebetween in a second direction that intersects the first direction. The nonreciprocal member is in contact with at least a part of the second core while being positioned side by side with the second core in the second direction. In a magnetic field generated by the magnetic body in a portion where the nonreciprocal member is positioned, a component in a third direction perpendicular to the first direction and the second direction is greater than any component other than the component in the third direction.

In an antenna, a first antenna element includes a first radiation conductor and a first feeder line. A second antenna element includes a second radiation conductor and a second feeder line. A second feeder line is coupled to the first feeder line such that a first component, which is a capacitance component or an inductance component, is dominant. A first coupler couples the first and second feeder lines such that a second component different from the first component is dominant. The first and second radiation conductors are arranged at interval of ½ or less of resonance wavelength. The second feeder line is coupled to the first radiation conductor such that a third component, which is the capacitance component or the inductance component, is dominant. The first coupling portion couples the first radiation conductor and the second feeder line such that a fourth component different from the third component is dominant.

A resonance structure includes a first conductor; a second conductor that faces the first conductor in a first direction; one or more third conductors that are positioned between the first conductor and the second conductor, and that extend along a first plane including the first direction; and a fourth conductor that is connected to the first conductor and the second conductor, and that extends along the first plane. The first conductor and the second conductor extend along a second direction that intersects with the first plane. The first conductor and the second conductor are configured to be capacitively coupled via the one or more third conductors. The one or more third conductors have asymmetry with respect to a third direction that intersects with the first direction in the first plane.

Structure, antenna, communication module, and wireless communication device

An antenna includes a housing of a resin, a first conductor group, and a power supply line. The housing includes first and second surfaces opposite in a first direction, third and fourth surfaces opposite in a second direction, and a housing portion surrounded by the first-fourth surfaces. The third surface connects the first and second surfaces. The first conductor group includes a first conductor, a second conductor, a second conductor group, and a third conductor. The first conductor is closer to the first surface than the second surface. The second conductor is closer to the second surface than the first surface. The second conductor group extends along the third surface and capacitively couples the first and second conductors. The third conductor extends along the fourth surface and electrically connects the first and second conductors. The power supply line is connected to any one portion of the second conductor group.

An antenna includes a radiation conductor, a ground conductor, first-fourth feeding lines, a first feeding circuit, and a second feeding circuit. The first feeding line to the fourth feeding line are configured to be electromagnetically connected to the radiation conductor. The first feeding circuit is configured to feed reversed-phased signals, which have mutually opposite phases, to the first feeding line and the third feeding line. The second feeding circuit is configured to feed reversed-phased signals, which have mutually opposite phases, to the second feeding line and the fourth feeding line. The radiation conductor is configured to be excited in a first direction due to the feed from the first feeding line and the third feeding line. The radiation conductor is configured to be excited in a second direction due to the feed from the second feeding line and the fourth feeding line.

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Kirishima, Japan

Hiromichi Yoshikawa