Murata Manufacturing Co., Ltd.

Kazutaka Higashi

Hideaki Yamada

Toru Tanizaki

Nobumasa Kitamori

Sadao Yamashita

Ikuo Takakuwa

Yohei Ishikawa

Tomohiro Nagai

Yasuaki Saitoh

A line transition device which intervenes between a non radiative dielectric waveguide and a hollow waveguide for example, includes a dielectric waveguide having a dielectric strip held by a pair of conductors which face each other, and a waveguide, wherein a part of the dielectric strip of the dielectric waveguide is adjacent to or inserted in the hollow waveguide.

Line transition device between dielectric waveguide and waveguide, and oscillator, and transmitter using the same

A first transmission line and a second transmission line are caused to be partially opposite to each other, and by use of the opposite portions of the first transmission line and the second transmission line, the first transmission line and the second transmission line are relatively shifted in parallel from their opposite state to their non-opposite state.

Directional Coupler, antenna device, and transmitting-receiving device

Directional coupler, antenna device, and transmitting-receiving device

A directional coupler including a first transmission line and a second transmission line adjacent to the first transmission line, the relative positions of the first transmission line and the second transmission line being changeable, an antenna element connected to a part of the directional coupler, and a driving mechanism for driving the directional coupler and the antenna element.

An antenna apparatus includes two substantially parallel conductor plates, a dielectric strip held between the two conductors, an aperture formed on the upper conductor plate above the dielectric strip, and a matching section for matching impedance between the dielectric strip and the aperture. The matching section is integrated with the dielectric strip below the aperture, thus continuously connecting the matching section to the dielectric strip.

Antenna apparatus and antenna and tranceiver using the same

Directional coupler having shiftable parallel dielectric transmission lines

A dielectric line has a conductor plate and dielectric strip on the side of a fixed portion and a dielectric line including a conductor plate and dielectric strip on the side of a moving portion. A directional coupler comprises the dielectric lines. On a dielectric plate of an array antenna portion a plurality of linear array antennas are formed and connected to a microstrip as a feed portion. By displacement of the moving portion, the feed point to the feed portion is changed and the feed phase to each linear array antenna and the feed power to each element antenna are changed. Thus, the direction of a beam is changed.

Array antenna device and radio equipment

The radiation directivity of radio waves can be controlled more easily over a wider range by using the disclosed dielectric lens. A dielectric lens element having a curved surface is bonded to one of the surfaces of a laminate element in the shape of a flat plate in which a plurality of dielectric layers whose relative dielectric constants are different for adjacent layers are laminated. By controlling the distribution mode of the relative dielectric constants in the laminate element, the radiation directivity for the entire dielectric lens apparatus can be controlled; therefore, the radiation directivity can be controlled more easily over a wider range. A focal point may be positioned within or at the surface of the laminate element, and a signal processing circuit may be formed within and/or at the surface of the laminate element.

Growing community of inventors

Hirakata, Japan

Kazutaka Higashi