公开(公告)号：AU599293B2

公开(公告)日：1990-07-12

申请号：AU1677888

申请日：1988-05-30

Applicant: NEC CORP

Inventor： YAMANE TOSHINOBU ,  KURAMOTO AKIO ,  SHIMIZU RYUJI ,  NAKAYAMA MAKOTO

IPC: G01S3/20 ,  G01S3/42 ,  H01Q3/08 ,  H01Q3/24 ,  G01S3/38 ,  H01Q3/02 ,  H01Q3/34

公开(公告)号：EP2058902A4

公开(公告)日：2013-03-20

申请号：EP08740234

申请日：2008-04-11

Applicant: NEC CORP

Inventor： KURAMOTO AKIO ,  YUSA HIROYUKI

IPC: H01Q21/24 ,  H01Q1/38 ,  H01Q7/02 ,  H01Q9/16 ,  H01Q9/20 ,  H01Q9/26 ,  H01Q9/42 ,  H04B7/10

CPC classification number: H01Q9/16 ,  H01Q7/02 ,  H01Q9/20 ,  H01Q9/265 ,  H01Q21/24 ,  H04B7/10

公开(公告)号：EP2251929A4

公开(公告)日：2011-06-08

申请号：EP09712240

申请日：2009-02-17

Applicant: NEC CORP

Inventor： KURAMOTO AKIO

IPC: H01Q9/16 ,  H01Q1/22 ,  H01Q5/10 ,  H01Q9/40

CPC classification number: H01Q9/285 ,  H01Q1/273 ,  H01Q5/25 ,  H01Q5/364

公开(公告)号：DE602004010047D1

公开(公告)日：2007-12-27

申请号：DE602004010047

申请日：2004-12-22

Applicant: NEC CORP

Inventor： KURAMOTO AKIO

IPC: H01Q9/28 ,  H01Q1/22 ,  H01Q1/24 ,  H01Q1/36 ,  H01Q1/38 ,  H01Q3/00 ,  H01Q9/40 ,  H01Q21/30

Abstract: In an antenna, a first flat radiating element is placed longitudinally. A second flat radiating element is located opposite to the first flat radiating element. The first and the second radiating element are connected to each other at their lower end portions. A third flat radiating element is longitudinally located below the second flat radiating element. A central conductor of a coaxial cable is connected to the lower end portions of the first and the second flat radiating elements. An outer conductor of the coaxial cable is connected to an upper end portion of the third flat radiating element. The coaxial cable is located parallel to the third flat radiating element.

公开(公告)号：DE69816701D1

公开(公告)日：2003-09-04

申请号：DE69816701

申请日：1998-05-05

Applicant: NEC CORP

Inventor： KURAMOTO AKIO ,  TANABE KOSUKE

IPC: H01Q1/38 ,  H01Q11/08

Abstract: A helical antenna comprising a cylindrical dielectric member 1, four spiral conductors 2a to 2d which are wound around the outer wall of the cylindrical dielectric member 1, four spiral conductors 3a to 3d which are attached to the inner wall of the cylindrical dielectric member 1, and power supply circuits 4, 5 for supplying high-frequency power to the spiral conductors 2a to 2d and the spiral conductors 3a to 3d respectively. That is, the spiral conductors serving as radiation elements are disposed at the outside and inside of the cylindrical dielectric member, and the outer and inner conductors are operated as independent helical antennas. These spiral conductors are connected to the power supply circuits for supplying the high-frequency power having desired amplitude and phase.

公开(公告)号：AU5191101A

公开(公告)日：2001-12-20

申请号：AU5191101

申请日：2001-06-14

Applicant: NEC CORP

Inventor： KURAMOTO AKIO

IPC: G07B15/00 ,  G08G1/09 ,  H01Q1/00 ,  H01Q1/32 ,  H01Q21/06

Abstract: In an antenna apparatus and the electronic toll collection (hereinafter, abbreviated to an ETC) system using it, an antenna apparatus (2) is provided in a space over a lane (3) through which an automobile (1) having ETC on-vehicle equipment (10) passes. An antenna which the antenna apparatus has radiates a radio wave having a radio beam emitted area (21) of a radio wave to communicate with the ETC on-vehicle equipment and, thereby, electronic toll collection is performed for the passing automobile. It is an object of the present invention to provide an antenna apparatus which is controllable so that the ETC on-vehicle equipment is in the center of the radio beam emitted area of the antenna apparatus, and also to provide an ETC system using it. The antenna apparatus integrates an antenna and a light emitting unit. The light emitting unit emits a visible light (31) to the radio beam emitted area for communicating with the ETC on-vehicle equipment 10 mounted on the automobile along the center line within the radio beam emitted area. A sensor (40) can detect the automobile and can determine an emitted period of the visible light.

公开(公告)号：CA2350317A1

公开(公告)日：2001-12-14

申请号：CA2350317

申请日：2001-06-13

Applicant: NEC CORP

Inventor： KURAMOTO AKIO

IPC: G07B15/00 ,  G08G1/09 ,  H01Q1/00 ,  H01Q1/32 ,  H01Q21/06 ,  H01Q19/00

Abstract: In an antenna apparatus and the electronic toll collection (hereinafter, abbreviated to an ETC) system using it, an antenna apparatus (2) is provided in a space over a lane (3) through which an automobile (1) having ETC on-vehicle equipment (10) passes. An antenna which the antenna apparatus has radiates a radio wave having a radio beam emitted area (21) of a radio wave to communicate with the ETC on-vehicle equipment and, thereby, electronic toll collection is performed for the passing automobile. It is an object of the present invention to provide an antenna apparatus which is controllable so that the ETC on-vehicle equipment is in the center of the radio beam emitted area of the antenna apparatus, and also to provide an ETC system using it. The antenna apparatus integrates an antenna and a light emitting unit. The light emitting unit emits a visible light (31) to the radio beam emitted area for communicating with the ETC on-vehicle equipment 10 mounted on the automobile along the center line within the radio beam emitted area. A sensor (40) can detect the automobile and can determine an emitted period of the visible light.

公开(公告)号：CA2199581C

公开(公告)日：2000-05-02

申请号：CA2199581

申请日：1997-03-10

Applicant: NEC CORP

Inventor： KURAMOTO AKIO ,  TANABE KOSUKE

IPC: H01Q13/08 ,  B29C65/60 ,  H01Q1/40 ,  H01Q9/04 ,  H01Q13/26

Abstract: A patch antenna has: a driven patch fed with a high-frequency signal to radiate a high-frequency electromagnetic field from its one surface; a parasitic patch receives the high-frequency electromagnetic field from the driven patch at a first surface and reradiates the high-frequency electromagnetic field from a second surface; and a radome which positively holds the driven patch and the parasitic patch inside of the radome; wherein the parasitic patch is held by the inner surface of the radome which contacts the second surface of the parasitic patch and by a holder which protrudes from the inner surface of the radome and covers a part of the first surface of the parasitic patch.

公开(公告)号：AU688419B2

公开(公告)日：1998-03-12

申请号：AU8182594

申请日：1994-12-29

Applicant: NEC CORP

Inventor： OHMURO NORIHIKO ,  KURAMOTO AKIO ,  TANABE KOSUKE

IPC: H01Q1/36 ,  H01Q11/08

公开(公告)号：CA2206443A1

公开(公告)日：1997-11-30

申请号：CA2206443

申请日：1997-05-29

Applicant: NEC CORP

Inventor： TANABE KOSUKE ,  KURAMOTO AKIO

IPC: H01Q15/02 ,  H01Q13/02 ,  H01Q15/08 ,  H01Q19/08 ,  H01Q3/46

Abstract: A lens antenna is disclosed which comprises a conical horn and a lens attached to an aperture of the horn. The lens has a first planar surface at a first side which faces free space and a hyperboloid of revolution at a second side opposite the first side and is made of a dielectric material with relative permittivity ranging from 2 to 4. The lens is provided with a cylindrical portion which has a second planar surface parallel to the first planar surface and displaced from the first planar surface by a predetermined distance. The cylindrical portion being concentric with the lens.