Fujitsu Ten Limited

Nippon Pillar Packing Co., Ltd.

Eisuke Hayakawa

Takeshi Okunaga

Akira Nakatsu

Hiroaki Yoshitake

Takumi Moriuchi

Takaaki Fujita

Provided is a distributor capable of reducing insertion loss while suppressing a ratio in power distribution among output lines from being changed. The distributoris a distributor that is connected with an input line Lin and output lines Loto Lorespectively formed on a dielectric substrateas microstrip lines, and distributes to the output lines Loto Lohigh frequency power fed from a feeding point to a branching point through the input line Lin. In addition, the distributoris configured to include a stub areathat is formed in the input line Lin, is separated from the branching point, and has a rectangular shape wider than line widths of a first area La and a second area Lb of the input line Lin. The stub areais arranged in a position where the distance dbetween an edge on the feeding point side and lateral edgeson an input side of the output lines Loand Losubstantially perpendicular to the input line Lin is substantially equal to (&#x3bb;g/4)&#xd7;(2n+1) where &#x3bb;g is a guide wavelength and n is an integer.

Distributor and planar antenna

A radar apparatus includes: a transmitting antenna including a first antenna and a second antenna that transmit transmission waves; a signal processor configured to determine a mounted state of the radar apparatus on the vehicle; and a phase adjuster that adjusts at least one of phases of transmission signals output to the first antenna and the second antenna of the transmitting antenna. The signal processor controls the phase adjuster to adjust the at least one of the phases of the transmission signals based on the mounted state determined by the signal processor.

Radar apparatus

In an antenna, an antenna element interval is reduced without depending on an interval between converters, to widen the range of a phase folding angle to widen a detection angle range. The antenna includes a first antenna element including a feeder line extending from a first converter and a plurality of radiating elements. A second antenna element includes a feeder line extending from a second converter aligned together with the first converter and a plurality of radiating elements. The first and second antenna elements respectively include, at partial line portions of the feeder lines which extend from the converters to closest radiating elements, bend portions which are bent in directions which the bend portions come close to each other. The partial line portions of the first and second antenna elements are disposed so as to be linearly symmetrical about a virtual line.

Antenna

An antenna includes a plurality of transmitting antennas that are: a first transmitting antenna that transmits a transmission wave in a right-upward direction relative to a reference axis substantially parallel to a road surface; a second transmitting antenna that transmits a transmission wave in a left-upward direction relative to the reference axis; a third transmitting antenna that transmits a transmission wave in a right-downward direction relative to the reference axis; and a fourth transmitting antenna that transmits a transmission wave in a left-downward direction relative to the reference axis. A transmission range of the transmission wave transmitted from each of the first transmitting antenna, the second transmitting antenna, the third transmitting antenna and the fourth transmitting antenna partially overlaps with the transmission ranges of the transmission waves transmitted from the transmitting antennas located in vicinity.

An antenna device according to an embodiment includes a dielectric substrate, a housing, and an interference prevention unit. On the top surface side of the dielectric substrate, a plurality of antennas is formed, and on the bottom surface side, a ground is formed, each as a conductive thin film pattern, respectively. The housing is formed of a conductive material, and formed to have a shape configured to function as a waveguide, and the top surface side of the housing is bonded to the bottom surface side of the dielectric substrate. The interference prevention unit is formed between the neighboring antennas to include at least a groove provided on the top surface side of the housing and a slit provided on the ground in the portion corresponding to the groove.

Antenna device and radar device

There is provided an antenna. A third transmission antenna is provided at a position shifted in a short direction of a first transmission antenna. A second transmission antenna is provided at a position between the first and third transmission antennas so that a portion of the second transmission antenna in a longitudinal direction is overlapped with a portion of the first and third transmission antennas in the longitudinal direction. A fourth transmission antenna is provided at a position point-symmetrical with respect to the position of the second transmission antenna, about the position of the third transmission antenna. A plurality of reception antennas are provided so that a portion of each of the reception antennas in the longitudinal direction is overlapped with a portion of the second transmission antenna in the longitudinal direction.

Antenna, radar apparatus and signal processing method

An antenna which reduces the number of end faces and perpendicular corners, and suffers from little deterioration of performance even if used for high frequency transmission/reception, in particular a microstrip patch antenna which is comprised of a dielectric substrate on the bottom surface of which a conductive ground plate is formed and on the top surface of which a patch antenna part formed by a conductor and a feeder circuit connected to the same are provided, wherein the feeder circuit is connected to the antenna part while offset by exactly a predetermined distance to either end side from a center of one side of said antennas part to which said feeder circuit is to be connected so that a transmission loss of the antenna becomes a predetermined value or less. The predetermined distance can be made 20 to 70% of the longitudinal side of the patch antenna part.

Growing community of inventors

Kobe, Japan

Eisuke Hayakawa