公开(公告)号：US11824259B2

公开(公告)日：2023-11-21

申请号：US16794702

申请日：2020-02-19

Applicant: DENSO CORPORATION

Inventor： Toshiya Sakai ,  Kazumasa Sakurai ,  Asahi Kondo

IPC: H01Q1/38 ,  H01Q1/48 ,  H01Q1/52 ,  H01Q13/10

CPC classification number: H01Q1/38 ,  H01Q1/48 ,  H01Q1/521 ,  H01Q13/106

Abstract: An antenna device includes a dielectric substrate having a first surface on which an antenna part is formed and a second surface on which a base plate is formed. The antenna part has one or more antenna patterns configured to act as radiating elements. The antenna patterns resonate in one or more resonance directions to incident waves having an operating frequency of the antenna part, thereby generating emitted waves having polarized waves different from those of transmitted/received waves which are transmitted/received by the antenna part. For each of the resonance directions, the antenna patterns include at least one line pattern having a width which is narrower than the total width of the antenna patterns in a direction perpendicular to the resonance direction.

公开(公告)号：US11143741B2

公开(公告)日：2021-10-12

申请号：US16654395

申请日：2019-10-16

Applicant: DENSO CORPORATION ,  SOKEN, INC.

Inventor： Toshiya Sakai ,  Kazumasa Sakurai ,  Asahi Kondo

IPC: G01S7/03 ,  G01S13/04 ,  H01Q1/42 ,  H01Q3/36 ,  H01Q21/06

Abstract: A radar system detects an object using radar waves and includes an antenna surface and a cover part. The antenna surface is provided with at least one array antenna arranged on a collinear arrangement straight line. The cover part covers the front of an antenna of the array antenna, where the front of the antenna is the side away from which radar waves are radiated with respect to the antenna surface as a boundary. The at least one array antenna is provided with at least one unit antenna where a plurality of antenna elements that radiate radar waves of the same phase are arranged in the same direction as the arrangement straight line. The unit antenna is arranged in a direction perpendicular to the arrangement straight line along the antenna surface. The cover part is configured such that the incidence angle of the radar waves is equal to or less than a Brewster angle.

公开(公告)号：US11101552B2

公开(公告)日：2021-08-24

申请号：US16078590

申请日：2017-02-23

Applicant: DENSO CORPORATION

Inventor： Kazushi Kawaguchi ,  Kazumasa Sakurai ,  Toshiya Sakai ,  Asahi Kondo

IPC: H01Q1/32 ,  H01Q15/14 ,  H01Q21/06 ,  H01Q13/08 ,  G01S7/03 ,  G01S13/931

Abstract: An antenna device includes a dielectric substrate, a ground plane, an antenna unit, a reflection unit, and an interruption unit. The interruption unit includes a plurality of second conductor patches disposed around the antenna unit, and a plurality of through-holes permitting electrical conduction between each of the second conductor patches and the ground plane, and interrupts a surface current flowing on a surface of the dielectric substrate.

公开(公告)号：US20180224542A1

公开(公告)日：2018-08-09

申请号：US15748090

申请日：2016-07-11

Applicant: DENSO CORPORATION

Inventor： Kazumasa Sakurai ,  Kazushi Kawaguchi ,  Toshiya Sakai ,  Yuji Sugimoto ,  Asahi Kondo

IPC: G01S13/93 ,  H01Q15/12 ,  G01S7/02

Abstract: An antenna apparatus has an antenna unit. The antenna unit transmits or receives a probe wave made of an electromagnetic wave. A magnet is disposed at a location through which the probe wave to be received by the antenna unit passes. The magnet works to generate a magnetic field along a direction in which the probe wave propagates. A polarizing filter is arranged on an opposite side of a magnetic body to the antenna unit. This minimizes the interference between an emitted wave and a reflected wave created by a cover, such as a bumper, regardless of the configuration of the cover.

公开(公告)号：US12300881B2

公开(公告)日：2025-05-13

申请号：US17646032

申请日：2021-12-27

Applicant: DENSO CORPORATION

Inventor： Kazumasa Sakurai ,  Toshiya Sakai

IPC: H01Q1/42 ,  G01S7/02 ,  G01S7/03 ,  G01S13/931 ,  H01Q1/52

Abstract: A radar device comprises an antenna portion, a radome, and a housing. The antenna portion includes an antenna surface provided with one or more antennas, the antenna emitting a radio wave. The radome is made of a material allowing passage of the radio wave emitted by the antenna portion, and is disposed to face the antenna surface. The housing forms, together with the radome, a space for accommodating the antenna portion. The housing includes a peripheral edge which surrounds the antenna surface and is in contact with the radome, at least part of the peripheral edge includes a barrier part which protrudes outward from the radome along the antenna surface.

公开(公告)号：US11121461B2

公开(公告)日：2021-09-14

申请号：US16659914

申请日：2019-10-22

Applicant: DENSO CORPORATION ,  SOKEN, INC.

Inventor： Toshiya Sakai ,  Kazumasa Sakurai ,  Asahi Kondo

IPC: H01Q1/52 ,  H01Q1/28 ,  H01Q15/24 ,  H01Q1/48

Abstract: An antenna device includes a dielectric substrate, a ground plane, an antenna unit, and an additional functional unit. The dielectric substrate includes a plurality of pattern formation layers. The ground plane is formed on a first pattern formation layer included in the plurality of pattern formation layers, and acts as an antenna grounding surface. The antenna unit is formed on a pattern formation layer that is included in the plurality of pattern formation layers and that is different from the first pattern formation layer. The antenna unit includes one or more antenna patterns configured to act as radiation elements. The additional functional unit includes one or more parasitic patterns provided on a propagation path for a surface propagating over the dielectric substrate, and causes the surface wave to generate a radiation wave with polarization different from polarization of a radio wave transmitted and received by the antenna unit.

公开(公告)号：US12276748B2

公开(公告)日：2025-04-15

申请号：US17495261

申请日：2021-10-06

Applicant: DENSO CORPORATION

Inventor： Kazumasa Sakurai ,  Toshiya Sakai

IPC: G01S7/02 ,  G01S7/03 ,  G01S13/93 ,  G01S13/931 ,  H01Q15/18

Abstract: A radar device configured to emit radio waves and detects an object present in a prescribed detection region includes an antenna unit and a radio wave reflector. The antenna unit is configured to emit the radio waves. The radio wave reflector is disposed in a region around the antenna unit and outside the detection region and includes a reflection surface having a height gradually changed with respect to an installation surface of the radar device.

公开(公告)号：US11575196B2

公开(公告)日：2023-02-07

申请号：US16061836

申请日：2016-12-15

Applicant: DENSO CORPORATION ,  SOKEN, INC.

Inventor： Kazushi Kawaguchi ,  Kazumasa Sakurai ,  Toshiya Sakai ,  Asahi Kondo

IPC: H01Q1/38 ,  H01Q19/00 ,  H01Q21/06 ,  H01Q1/32 ,  H01Q1/48 ,  H01Q15/00 ,  H01Q9/04 ,  G01S13/931

Abstract: An antenna device includes a dielectric substrate, a ground plate arranged on a first surface of the dielectric substrate, an antenna part arranged on a second surface of the dielectric substrate, and a reflecting part. The reflecting part is arranged around the antenna part and has a plurality of conductor patches each functioning as a reflecting plate. The plurality of conductor patches form a plurality of blocks aligned along a predetermined block arrangement direction. The plurality of blocks are configured such that phases of reflected waves at an operating frequency are different for each of the blocks and phase differences of reflected waves between adjacent blocks are non-uniformly different for each of the adjacent blocks.

公开(公告)号：US11353546B2

公开(公告)日：2022-06-07

申请号：US16303935

申请日：2017-05-17

Applicant: DENSO CORPORATION

Inventor： Toshiya Sakai ,  Kazumasa Sakurai ,  Kazushi Kawaguchi ,  Takuya Koya

IPC: G01S7/03 ,  H01Q1/42 ,  G01S13/931 ,  H01Q1/32 ,  B60R19/48 ,  H01Q15/08 ,  G01S7/02

Abstract: A radar apparatus includes an antenna unit and a cover unit. The cover unit is arranged at a position through which an electromagnetic wave sent and received by the antenna unit passes. The cover unit has, in an order from closer to the antenna unit, a first dielectric layer formed of a dielectric and a second dielectric layer formed of a dielectric having a dielectric constant different from that of the first dielectric layer. The first dielectric layer is configured to have a thickness not more than that for a maximum external transmittance. The external transmittance indicates a transmittance of an electromagnetic wave, which is emitted in a direction of an incidence angle with respect to the first dielectric layer, which is equal to a maximum sensing angle, when the electromagnetic wave is transmitted through the cover unit.

公开(公告)号：US11336024B2

公开(公告)日：2022-05-17

申请号：US17038625

申请日：2020-09-30

Applicant: DENSO CORPORATION

Inventor： Kazumasa Sakurai ,  Toshiya Sakai

IPC: H01Q15/02 ,  H01Q15/24 ,  H01Q1/48 ,  H01Q1/52 ,  H01Q21/06 ,  H01Q21/24

Abstract: A reflection reducing apparatus includes a dielectric base plane (30), a first patch group, a second patch group, and a ground plate (40). A plurality of first conductive patches (10) each resonate in a first direction (α) and a second direction (β) which are different in resonant length from each other. A plurality of second conductive patches include a first direction-oriented patch (20a) and a second direction-oriented patch (20b) which are different in resonant length from each other. The second conductive patches are arranged along an outer periphery of the first patch group at an interval away from the first patch group.