Denso Corporation

Nippon Soken, Inc.

Toyota Jidosha Kabushiki Kaisha

Yamaha Corporation

Ichiro Shigetomi

Shiro Koide

Takafumi Nishi

Akira Takaoka

Yuji Sugimoto

Seishin Mikami

Keizoh Kawaguchi

Kunito Takahashi

Masaaki Hisada

Katsuhiro Ohara

Masayuki Nakabuchi

A microphone-loudspeaker integrated apparatus includes a plurality of microphones, a loudspeaker, and a synthesis unit. The loudspeaker is disposed between the plurality of microphones. The synthesis unit synthesizes sounds collected from the plurality of microphones. A distance between the plurality of microphones is set so as to fall within a range within which sound at a frequency needed for recognizing voice is collectable and within a range within which a noise amount due to vibration of the loudspeaker is allowable, when voice recognition is performed based on sound obtained through synthesis by the synthesis unit.

Microphone-loudspeaker integrated apparatus and vehicle

A tire theft alarming system includes a vehicular device mounted to a vehicle and a mobile device carried by a user of the vehicle. When a main power supply of the vehicle is in an OFF state, the vehicular device transmits a radio wave including a first alarm based on having a variation in air pressure or acceleration of a tire, which is mounted to the vehicle, detected by a sensor transmitter for detecting and transmitting the air pressure of the tire or the acceleration applied to the tire. The mobile device carries out a warning notification to a user based on having reception of a radio wave including a first alarm transmitted by the vehicular device.

Tire theft alarm system

In a U-shaped deformed folded dipole antenna, a first parallel section having a feeding point includes first and second L-shape sections, and a second parallel section without a feeding point includes first and second opposing side portions and a connecting side portion coupling ends of the first and second opposing side portions. Portions of the first and second L-shape sections arranged in parallel with the first and second opposing side portions have a width W. Portions of the first and second L-shape sections arranged in parallel with the connecting side portion have a width W. The first and second opposing side portions have a width W. The connecting side portion has a width W. An impedance of the deformed folded dipole antenna is controlled by setting the width Wto be larger than the widths W, W, and W

Deformed folded dipole antenna, method of controlling impedance of the same, and antenna device including the same

A multi-band antenna includes two conductive wirings and unit circuits cascaded along the conductive wirings. Each unit circuit includes a communication unit, a first capacitor and a second inductor. The communication unit connects between the conductive wirings through a first inductor and a second capacitor connected in series with the first inductor. The first capacitor and the second inductor are inserted in at least one of the conductive wirings. The second inductor is connected in parallel with the first capacitor. Alternatively, the unit circuit includes a communication unit connecting between the conductive wirings through a first inductor, and a first capacitor inserted in at least one of the conductive wirings. The first inductor, the first capacitor, a third capacitor disposed between the conductive wirings, and a third inductor disposed on at least one of the conductive wirings satisfy a relationship expressed by the expression 2.

Multi-band antenna

In an antenna device, a first helical part of a first antenna and a second helical part of a second antenna is disposed in a dielectric body on a ground plane. Each helical part is helically wound up in a direction perpendicular to the ground plane and includes a plurality of one-turn portions. Each one-turn portion of the first helical part has a peripheral length of M times a wavelength &#x3bb; of use, where M is a positive natural number. One of the one-turn portions of the second helical part closest to the ground plane has a peripheral length Ks that is N times the wavelength &#x3bb; of use, where N is a positive natural number greater than M. One of the one-turn portions of the second helical part farthest away from the ground plane has a peripheral length Ke, and (M&#xb7;&#x3bb;)&#x3c;Ke&#x3c;Ks(=N&#xb7;&#x3bb;).

Antenna device including helical antenna

A helical antenna includes a ground plate, a first helical portion spirally wound perpendicular to the plate, a second helical portion spirally wound perpendicular to the plate and surrounding the first helical portion radially outward of the first helical portion, and a feeder circuit. The circuit includes an oscillator, a divider connected to the oscillator, a first phase shifter connected between a first output terminal of the divider and a feeding point of the first helical portion, and a second phase shifter connected between a second output terminal of the divider and a feeding point of the second helical portion. Length of one turn of the first helical portion is equal to a result of multiplication of a wavelength of oscillation of the oscillator by N. Length of one turn of the second helical portion is equal to a result of multiplication of the wavelength by M (M&#x3e;N).

Growing community of inventors

Nagoya, Japan

Ichiro Shigetomi