Mitsubishi Electric Corporation

Mitsubishi Electric Corpotation

Motomi Watanabe

Hidenori Yukawa

Yu Ushijima

Naofumi Yoneda

Shinji Arai

Tomohiro Takahashi

Takeshi Oshima

Takuma Nishimura

Takeshi Yuasa

Jun Goto

Yukihiro Homma

Kenji Harauchi

Toru Okagaki

A high frequency filter includes: a multilayer substrate including a first substrate for which lands are provided, a second substrate for which lands are provided, and a third substrate for which lands are provided, the third substrate being sandwiched between the first substrate and the second substrate; a columnar conductor electrically connected to the lands in the multilayer substrate; and columnar conductors provided to surround the columnar conductor, electrically connected to a ground plane of the first substrate, and electrically connected to a ground plane of the second substrate. The spacing between the lands of the first substrate and the lands of the third substrate and the spacing between the lands of the second substrate and the lands of the third substrate are electrical lengths of 90 degrees or less at the cutoff frequency.

High frequency filter

Waveguide

A coaxial line is provided which includes: a first columnar conductor disposed inside a multilayer substrate such that one end thereof is coupled to a first stripline and that the other end thereof is coupled to a second stripline; and one or more second columnar conductors penetrating the multilayer substrate such that one end thereof is coupled to a ground layer and that the other end thereof is coupled to a ground layer, the first columnar conductor acting as an inner conductor, and the second columnar conductors acting as outer conductors. Each of the first and second striplines is coupled to an open stub acting as resonators and a matching conductor acting as capacitance matching elements.

A waveguide unit () is closed at one end thereof by a short circuit plane () provided with through holes (-to-). Radio wave absorbers (-to-) absorb a frequency signal being a non-reflective target in the state of being inserted through the through holes (-to-) toward the inside of the waveguide unit () and contacting inner surfaces ('-to&#x2032;-) of the through holes (-to-).

Waveguide non-reflective terminator and waveguide circuit

A square waveguide () has four ridges (). The cross section of the square waveguide () perpendicular to a waveguide axial direction is square. Inside the square waveguide (), two rectangular waveguide terminals () are formed by partitioning the inside along the waveguide axial direction. A septum phase plate () formed to get narrower stepwisely as its gets closer to a square waveguide terminal () opposite to the rectangular waveguide terminals () is provided. A projecting portion () is provided on a part of a ridge () formed on a ridge-side wall surface opposite to a wall surface, the septum phase plate () being joined to the wall surface in a part where the septum phase plate has largest width, the projecting portion () being larger than other parts of the ridge () in a cross-sectional shape perpendicular to the waveguide axial direction.

Polarization separation circuit

A substrate is used as one tube wall of a hollow waveguide, the substrate including a strip line wired in an inner layer, a first ground surface formed on a front surface, and a second ground surface formed on a part of a back surface. As a result of such a configuration, a waveguide strip line transducer having the same dimension as the external dimension of the hollow waveguide can be obtained.

Waveguide to strip line transducer including a waveguide wall forming substrate having an end surface bonded to a second conductor, and a power feed circuit formed therefrom

An input waveguide () having one end connected between an L-shaped waveguide () and an L-shaped waveguide () and another end connected to the PORT (); an output waveguide () having one end connected between the L-shaped waveguide () and a flat waveguide () and another end connected to the PORT (); an output waveguide () having one end connected between the flat waveguide () and an L-shaped waveguide () and another end connected to the PORT (); an output waveguide () having one end connected between the L-shaped waveguide () and an L-shaped waveguide () and another end connected to the PORT (); and a plurality of branching waveguides () each having one end connected to the output waveguide () and another end connected to the output waveguide () are provided.

Growing community of inventors

Tokyo, Japan

Motomi Watanabe