Nec Corporation

Tokyo Shibaura Denki Kabushiki Kaisha

Shigeo Yamada

Seiji Tomita

Takamasa Kurafuzi

Hideo Yokoyama

Shigeharu Kitagawa

A radio apparatus () according to the present invention used in a line-of-sight (LOS) MIMO communication system includes a plurality of antennas () and a position adjustment unit (). The position adjustment unit () is configured to be able to adjust a relative position between at least one of the plurality of antennas () and an antenna included in another radio apparatus (other station). According to the present invention, it is possible to provide a radio apparatus capable of adjusting antennas to appropriate positions in the line-of-sight MIMO communication system.

Radio apparatus, radio communication system, and antenna position adjustment method

A communication apparatus according to the present invention comprises first communication means configured to transmit differential signals serving as first information over a first wire pair; second communication means configured to transmit differential signals serving as second information over a second wire pair; and third communication means configured to transmit third information by transmitting one of differential signals over the first wire pair and transmitting the other of the differential signals over the second wire pair. It is possible to provide a communication apparatus that spurious emission is suppressed.

Communication apparatus, signal superimposing circuit, and method for superimposing signals

A tape recorder using a magnetic erase head wherein the erase head is brought into contact with a tape in the record mode and is separated therefrom in the play mode. A record operating member determines whether or not the erase head is brought into contact with the tape. The movement of the erase head is controlled by the rotational force of the motor, thereby improving 'soft-' or 'feather-touch' operation.

Tape recorder having soft-touch control of an erase head

A tape player of small size and weight capable of detecting the end of the tape with a simple mechanism and automatically shutting off the tape player when the end of the tape is detected. The tape player includes a drive gear driven by a motor; a fast speed gear, which drives the tape during the rewind and fast forward modes; and a normal speed gear, which drives the tape during the record and playback modes. The drive gear, fast speed gear, and normal speed gear are mounted on the same spindle and are connected by coupling means that cause the gears to rotate together until the end of the tape is reached. The normal speed gear is connected via a friction coupling to a bias lever that forces cam following means on a shut-off lever to follow an eccentric cam on the drive gear. When the end of the tape is reached, one of the coupling means uncouples, the normal speed gear stops rotating, the bias lever releases the shut-off lever, the cam following means engages an engaging part on the drive gear, and the engaging part rotates the shut-off lever to a position where it engages a switch means, cutting off power to the tape player.

Growing community of inventors

Tokyo, Japan

Shigeo Yamada