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公开(公告)号：AU3562802A
公开(公告)日：2002-10-31
申请号：AU3562802
申请日：2002-04-24
Applicant: NEC CORP
Inventor： KURAMOTO AKIO
Abstract: A cylindrical reflector having a through hole in conformity with the shape of an elemental portion is fitted to the elemental portion in a LAN antenna in which the elemental portion encloses a linear conductor therein and projects from a base table, and further, the reflector is turned to be set at a position at which the directivity is formed in a specific direction. A flat plate or a curved plate forming a reflecting surface of the reflector is arbitrarily set, thus forming a desired radiation pattern of a beam.
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公开(公告)号：DE69708358T2
公开(公告)日：2002-07-18
申请号：DE69708358
申请日：1997-03-10
Applicant: NEC CORP
Inventor： KURAMOTO AKIO , TANABE KOSUKE
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公开(公告)号：AU749832B2
公开(公告)日：2002-07-04
申请号：AU6479198
申请日：1998-05-07
Applicant: NEC CORP
Inventor： KURAMOTO AKIO , TANABE KOSUKE
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.
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公开(公告)号：DE69708358D1
公开(公告)日：2002-01-03
申请号：DE69708358
申请日：1997-03-10
Applicant: NEC CORP
Inventor： KURAMOTO AKIO , TANABE KOSUKE
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公开(公告)号：AU716231B2
公开(公告)日：2000-02-24
申请号：AU2372097
申请日：1997-05-30
Applicant: NEC CORP
Inventor： KURAMOTO AKIO , TANABE KOSUKE
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.
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Patent Agency Ranking
公开(公告)号：CA2232064A1
公开(公告)日：1998-09-14
申请号：CA2232064
申请日：1998-03-13
Applicant: NEC CORP
Inventor： KURAMOTO AKIO
Abstract: A small helical antenna with broad fan radiation pattern provides easy impedance matching and high radiation efficiency. It is composed of a dielectric cylinder, a plurality of radiation conductors arranged on the outer surface of the dielectric cylinder, a matching conductor arranged on the upper inner surface of the dielectric cylinder that cancels inductive reactance, and a plurality of feeder conductors arranged near the radiation conductors on the lower inner surface of the dielectric cylinder and lowering the impedance of the helical antenna.
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公开(公告)号：CA2139198C
公开(公告)日：1998-08-18
申请号：CA2139198
申请日：1994-12-28
Applicant: NEC CORP
Inventor： OHMURO NORIHIKO , KURAMOTO AKIO , TANABE KOSUKE
Abstract: In a helical antenna where a helical conductor is spirally wound on a coaxial cable, spacings between turns of the helical conductor are changed in accordance with the positions of the turns.
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公开(公告)号：CA2199581A1
公开(公告)日：1997-09-11
申请号：CA2199581
申请日：1997-03-10
Applicant: NEC CORP
Inventor： KURAMOTO AKIO , TANABE KOSUKE
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公开(公告)号：CA1321640C
公开(公告)日：1993-08-24
申请号：CA587856
申请日：1989-01-10
Applicant: NEC CORP
Inventor： KURAMOTO AKIO , YAMANE TOSHINOBU , ICHIYOSHI OSAMU , KOSUKEGAWA KAZUO
Abstract: In an antenna device comprising an antenna block which can electrically control a direction of a radio wave transmitted or received by the antenna device, a phase shift unit is connected to the antenna block to phase shift an external electric signal or an internal electric signal given to or from the antenna device. The phase shift unit has variable and discrete phase shifts switched from one to another in response to a control signal supplied from a controller and supplies a phase shifted external signal to the antenna block or a phase shifted internal signal to an external device. The antenna block comprises a plurality of antenna elements and a plurality of phase shifters which are connected to the antenna elements to send the phase shifted external signal to the respective antenna elements or to send the internal electric signal to the phase shift unit.
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公开(公告)号：JP2008113336A
公开(公告)日：2008-05-15
申请号：JP2006295913
申请日：2006-10-31
Inventor： KURAMOTO AKIO
Abstract: PROBLEM TO BE SOLVED: To provide an antenna element having a wide-band omnidirectional radiation pattern.
SOLUTION: The antenna has two radiation elements of plate type conductors. One radiation element is in a key-like shape and the inside of a bent portion forming the key-like shape is formed with arbitrary straight lines or curved lines. The other radiation element is in an L shape, and the inside of a bent portion forming the L shape is formed with arbitrary straight lines or curved lines.
COPYRIGHT: (C)2008,JPO&INPITAbstract translation: 要解决的问题：提供具有宽带全向辐射图案的天线元件。
解决方案：天线具有两个板式导体的辐射元件。 一个辐射元件为键状，形成键状的弯曲部分的内部形成有任意的直线或曲线。 另一个辐射元件是L形，并且形成L形的弯曲部分的内部形成有任意的直线或曲线。 版权所有（C）2008，JPO＆INPIT
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