Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Nihon Kohden Corporation

Mitsubishi Electric Corpotation

Hidenori Yukawa

Yu Ushijima

Motomi Watanabe

Naofumi Yoneda

Shinji Arai

Tomohiro Takahashi

Takeshi Oshima

Tetsu Owada

Shuji Nuimura

Hiroto Ado

Akira Inoue

Atsushi Yamamoto

Toru Takahashi

Hiroyuki Okada

Moriyasu Miyazaki

Jun Goto

Tomohiro Mizuno

Hidehiro Hosaka

Takuma Nishimura

Takeshi Yuasa

Yukihiro Homma

Kazuhisa Yamauchi

Kenji Harauchi

Hideyuki Oh-Hashi

Hiromasa Nakajima

Harutoshi Terasawa

Michihiro Nakamura

Ryuya Seki

Koichi Fujisaki

Hiroomi Ueda

Takaaki Kimata

Masatoshi Nii

Toru Okagaki

A polarized waveguide filter is formed in which the polarized waveguide filter includes a first rectangular waveguide; a second rectangular waveguide; and a rectangular cavity resonator that has a first edge surface connected to an electromagnetic wave exit plane of the first rectangular waveguide via a coupling unit, and has a second edge surface facing the first edge surface and connected to an electromagnetic wave incident plane of the second rectangular waveguide via a coupling unit, and excites each of a TE10 mode and a TE20 mode of an electromagnetic wave, and the rectangular cavity resonator has two first wall surfaces and two second wall surfaces narrower in area than the first wall surfaces, and a protrusion that shifts a resonance frequency of the TE10 mode and a resonance frequency of the TE20 mode by respective amounts different from each other is provided on at least one of the two first wall surfaces, in such a way as to protrude outward from the rectangular cavity resonator.

Polarized waveguide filter and antenna feeding circuit

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 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.

Three-way power divider and multibeam forming circuit

A circularly polarized wave generator includes a rectangular hollow waveguide (), a plurality of first protrusions () that are provided on one pair of opposing wall surfaces in the waveguide (), have longitudinal directions orthogonal to an axial direction of the waveguide (), and are arranged at intervals along the axial direction, and a plurality of second protrusions () that are provided between the first protrusions () on the wall surfaces and are arranged with longitudinal directions thereof running along the axial direction.

Circularly polarized wave generator

A polarization coupler includes: connector waveguide that connects circular waveguide with quadrangular waveguide arranged in an axial direction of circular waveguide and having short side shorter than an inner diameter of circular waveguide; flat conductor wall formed over connector and circular waveguides, and dividing the inside of connector and circular waveguides arranged parallel to an extending direction of long side of quadrangular waveguide; first inclined surface formed on inner wall of connector waveguide at a position facing one surface of conductor wall, and inclined toward conductor wall as coming closer to quadrangular waveguide; second inclined surface formed on the inner wall of connector waveguide at a position facing the other surface of conductor wall, and inclined toward conductor wall as coming closer to quadrangular waveguide; and coupling hole, formed in circular waveguide, for extracting one polarization-divided by conductor wall out of electromagnetic waves propagated through circular waveguide.

Polarization coupler

A variable frequency amplifier includes a main amplifier systemfor amplifying one of signals into which an input signal is split by a directional couplerto output the amplified signal, and an injection amplifier systemfor adjusting at least one of the amplitude and phase of the other one of the signals into which the input signal is split by the directional coupleraccording to a setting provided thereto from outside the variable frequency amplifier, and for amplifying the other signal and injecting this amplified signal into an output side of the main amplifier system

Variable frequency amplifier

One end of a thin-tube type solid phase in which a receptor specific for a material or an organism to be measured which can induce a pH-change of substrate solution is immobilized is soaked in a sample solution and then taken out therefrom. The one end of the thin-tube type solid phase is disposed in a measurement cell and a sensing portion of a pH electrode disposed in the measurement cell is in the vicinity of the one end of the thin-tube type solid phase. The measurement cell and the thin-tube type solid phase are filled with a substrate solution so that a reaction takes place. Thereafter, the substrate solution in the thin-tube type solid phase is moved to the sensing portion by a solution feed pump. The output of the pH electrode at this timing is detected.

Measuring apparatus and method for material or organism inducing PH-change of substrate solution

An RF circuit module comprising a first RF semiconductor device mounted within a cavity surrounded by a wall of a first dielectric circuit board and a second RF semiconductor device mounted to a second dielectric circuit board placed on the wall A metal base is disposed on the first circuit board and a number of embedded conductors such as via holes are embedded within the wall and arranged to surround the cavity so that each having one end electrically connected to the metal base and the other end exposed and arranged to surround the cavity A metal cover is sealingly attached to the first circuit board to cover the second circuit board and the second RF semiconductor device and electrically connected at the upper surface of the wall Therefore, the first and second RF semiconductor devices are electrically shielded and hermetically sealed, providing an RF circuit module of small-sized and high-performance. The metal cover may have a plate-like shape, the first circuit board may be a high-temperature burned circuit board and the second circuit board may be a low-temperature burned circuit board, the electrical connection between the first circuit board and the second circuit board may be made through a solder bump or an anisotropic conductive sheet. The metal base may be exposed to the cavity, the first circuit board may have mounted thereon a transmission circuit and the second circuit board may have mounted thereon a reception circuit, and a high-frequency circuit device, which is not necessary to be hermetically sealed, may be mounted on the first circuit board outside of the metal cover.

RF circuit module

Growing community of inventors

Tokyo, Japan

Hidenori Yukawa