Mitsubishi Electric Corporation

Mitsubishi Electric Corpotation

Mitsuru Kirita

Shigeo Udagawa

Takashi Maruyama

Naofumi Yoneda

Akimichi Hirota

Hiroshi Sakamaki

Satoshi Kageme

Tai Tanaka

Makoto Koukuwano

Ryotaro Ohashi

A method for calibrating a phased array antenna is provided. The phased array antenna includes multiple transmission modules each including a phase shifter that changes a phase of a high frequency signal output from a signal source, an amplifier that amplifies an amplitude of the high frequency signal, and a transmission antenna that converts the high frequency signal into a radio wave, and a reception module including a reception antenna. The method includes a step of receiving, by the reception antenna, a reflected wave that is a radio wave transmitted from the transmission antenna of each of the multiple transmission modules and reflected outside the phased array antenna, and a step of adjusting the phase shifter and the amplifier of each of the multiple transmission modules based on an amplitude and a phase of the reflected wave received.

Phased array antenna calibration method and phased array antenna calibration system

A waveguide-microstrip line converter includes a waveguide having an open end, a dielectric substrate having a first surface facing the open end and a second surface facing the opposite direction to the first surface, a ground conductor provided on the first surface and connected to the open end, the ground conductor being provided with a slot in a region enclosed by the end face of the open end, and a line conductor provided on the second surface. The line conductor includes a conversion section that performs power conversion between the line conductor and the waveguide, a microstrip line-provided at a distance from the conversion section in a first direction, and an impedance transformer provided between the conversion section and the microstrip line, for performing impedance matching between the conversion section and the microstrip line. A hole is formed in the conversion section.

Waveguide-microstrip line converter having a conversion section with a hole therein

An antenna device includes a transmitting antenna including a transmission channel, a transmitting antenna including a transmission channel, a transmitting antenna including a transmission channel, a transmitting antenna including a transmission channel, and a receiving antenna including reception channels. An interval between the transmitting antenna and the transmitting antenna is wider than an overall width of the receiving antenna. An interval between the transmitting antenna and the transmitting antenna is narrower than an interval between adjacent channels among the reception channels.

Antenna device and radar apparatus

A waveguide microstrip line converter includes: a waveguide; a dielectric substrate; a ground conductor provided with a slot; a line conductor; and a conductor located at a distance from the line conductor and adjacent to the line conductor. The line conductor includes a microstrip line, a conversion unit, a first impedance transforming unit, a second impedance transforming unit, and a third impedance transforming unit, the microstrip line having a first line width, the conversion unit being located immediately above the slot and having a second line width larger than the first line width, the first impedance transforming unit, the second impedance transforming unit, and the third impedance transforming unit extending in a first direction from the conversion unit and having a role in impedance matching between the microstrip line and the conversion unit. The conductor is adjacent to at least part of the conversion unit of the line conductor.

Waveguide microstrip line converter

An antenna device is formed in such a manner that reception antennas are arranged at regular intervals between two transmission antennas adjacent to each other among transmission antennas, and a spacing between the transmission antenna and the transmission antenna has a width obtained by adding an integral multiple of a spacing dbetween each two of the reception antennas to a width obtained by dividing the spacing dby the number Nof the transmission antennas.

Antenna device and radar device

A radar signal processing device capable of performing a highly accurate object identification is obtained. A first feature quantity related to a relative distance and a relative speed to an object, the direction and the reflection intensity of the object, which are extracted by a first feature quantity extraction block, is made identical in time series in a data storage processing block; a second feature quantity is extracted by a second feature quantity extraction block; one in which an instant score is accumulated in a cycle direction to the distribution of the second feature quantity related to a predetermined category calculated by an attribution degree calculation block is calculated as an accumulation score by an accumulation/instant score calculation block; and a category of the object is determined by an object determination block on the basis of the accumulation score calculated by the accumulation/instant score calculation block.

Radar signal processing device

The radar signal processing device includes: a transmitter; a receiver configured to acquire a received signal based on a reflected wave received from the object; a detector unit configured to detect information to be used for type determination of the object from the received signal; an object determination unit configured to determine a type of the object; and a control unit configured to identify a weighting factor set for each piece of the information to be used for the type determination of the object based on a characteristic of the received signal. The object determination unit is configured to obtain a total sum value by multiplying the corresponding weighting factor identified by the control unit for each piece of the information detected by the detector unit, and to determine the type of the object based on the total sum value.

A feeder circuit includes: a first linehaving first and second ends; a second linehaving first and second ends; a third linehaving first and second ends; a first combinerconfigured to combine signals output from the second ends of the first and second linesand; a first coupling portionconfigured to electrically couple portions of the first and third lines to each other; and a second coupling portionconfigured to electrically couple portions of the second and third lines to each other in a manner that allows a signal reaching the first combiner from the first end of the third line through the first coupling portion and a signal reaching the first combiner from the first end of the third line through the second coupling portion, to be cancelled out.

Feeder circuit

An EMC shield apparatus has an antenna including a conductor part, a substrate, which is arranged to be separated from the antenna, and on which a circuit that processes a signal supposed to be transmitted by the antenna or a signal received by the antenna is mounted, and a shielded conductor that is connected to the conductor part of the antenna such that a closed loop circuit that surrounds the substrate is formed, and covers periphery of the substrate together with the antenna in a steric manner, keeping a distance from the substrate.

EMC shield apparatus

A coupling slotprovided in a wide wall shared by a first rectangular waveguideand a second rectangular waveguidearranged by stacking is formed by directing a longitudinal direction of the coupling slotto a tube axial direction, and a matching conductorprojecting to a waveguide near the coupling slotis provided on one sidewall of the second rectangular waveguide. A process of providing the matching conductoris easy, a structure that can be manufactured at low cost is obtained, and a power distribution ratio can be set at an arbitrary ratio.

Growing community of inventors

Tokyo, Japan

Mitsuru Kirita