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公开(公告)号：JP2002076736A
公开(公告)日：2002-03-15
申请号：JP2000263760
申请日：2000-08-31
Applicant: NEC CORP
Inventor： KURAMOTO AKIO
Abstract: PROBLEM TO BE SOLVED: To provide a chip antenna that can improve the effective gain of the antenna and a communication line quality. SOLUTION: A chip antenna comprise; an electrode terminal 3 arranged on a side of a ground conductor of a substrate of a dielectric 4; an antenna element 5 arranged on a face opposite to the ground conductor of the substrate; a conductive element 6 whose one end is connected to the antenna element 5 and which is arranged in the substrate between the antenna element 5 and the electrode terminal 3 and arranged vertically to the ground conductor and the face opposite to the ground conductor; power feeder lines 7, 8 having an extended part parallel to the antenna element 5 connected to a position between the conductor element 6 and the electrode terminal 3. The antenna element 5 can be changed to a predetermined shape. For example, the other element can be arranged bear the antenna element 5 and the conductor element 6.
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公开(公告)号：JP2002050918A
公开(公告)日：2002-02-15
申请号：JP2000233606
申请日：2000-08-01
Applicant: NEC CORP
Inventor： KURAMOTO AKIO
Abstract: PROBLEM TO BE SOLVED: To provide a chip antenna which can improve effective antenna gain and improve circuit quality by enabling transmission/reception of plural kinds of linearly polarized wave. SOLUTION: A chip antenna 1 is formed in a rectangular parallelepiped dielectric block 4. A first linear radiating element 6 is formed on one side (the upper surface) of the dielectric block 4. A second radiating element 5 is bent and connected to one end G of the radiating element 6 and on one side of the dielectric block 4. The dielectric block 4 has a ground conductor 2 on the other side (the bottom surface). A third radiating element 8 connects the ground conductor 2 and the other end C of the radiating element 6 approximately vertically to the ground conductor 2. The other side of the dielectric block 4 has a first electrode 3 for insulation from the ground conductor 2. A feeder line is connected between the electrode 3 and a point P of the radiating element 6. Elements 5 and 6 transmit/receive horizontally polarized waves, while the element 8 and an element 7 of the feeder line transmit/receive vertically polarized waves.
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公开(公告)号：JPH10224140A
公开(公告)日：1998-08-21
申请号：JP2135797
申请日：1997-02-04
Applicant: NEC CORP
Inventor： KURAMOTO AKIO
Abstract: PROBLEM TO BE SOLVED: To provide a tubular radiation element antenna which has a surface radiation element that can make an antenna exterior into a pole shape. SOLUTION: A radiation element 1A is a tubular plane radiation element, in which one end part of a cylinder 12A that is cylindrical conductive material is closed by a top board 11. A coaxial line 2 is arranged on a central axis (z) of the element 1A. A feeding part that includes an electric supply line 31 that extends a central conductor 21 of the line 2 energizes a high-frequency signal between the conductor 21 of the line 2 and a feeding point 32 of a radiation element. Various antenna characteristics are acquired by working the other end part 13A of the cylinder 12A into various shapes.
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公开(公告)号：JPH0878945A
公开(公告)日：1996-03-22
申请号：JP21247794
申请日：1994-09-06
Applicant: NEC CORP
Inventor： KURAMOTO AKIO , TANABE KOSUKE
IPC: H01Q11/08
Abstract: PURPOSE: To improve the durability of a helical pattern and to facilitate electric matching by winding a flexible substrate and a conductor to form the helical pattern around a dielectric cylinder using a pressure sensitive adhesive double coated tape, and short-circuiting respective pattern terminal parts each other through a metal conductor. CONSTITUTION: Two lead wires to form a flexible substrate 7 and a helical pattern 1 are wound around a dielectric cylinder 4 to be a core by a pressure sensitive adhesive double coated tape 3, the terminal parts of the pattern 1 are connected to a U-shaped, etc., metal conductor 6, whose length to pass through the cylinder 4 is variable and impedance can be adjusted, and short- circuited each other, and the helical antenna is formed. Thus, the durability of the helical pattern is improved even in the environment of a wider temperature range in comparison with the case of winding the printed flexible substrate around the dielectric cylinder and fixing it to the projecting part of the dielectric cylinder by the lead wire and the helical antenna easy to adjust electrically can be provided.
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公开(公告)号：JPH07202550A
公开(公告)日：1995-08-04
申请号：JP33480893
申请日：1993-12-28
Applicant: NEC CORP
Inventor： OOMURO MUNEHIKO , KURAMOTO AKIO , TANABE KOSUKE
IPC: H01Q11/08
Abstract: PURPOSE:To obtain a high gain in a wide elevation range by increasing or reducing the radius of an antenna by numbers of turns or increasing or reducing the density of lines by numbers of turns. CONSTITUTION:A diameter D of winding of helical conductors 5 and 6 is fixed, and the density of lines of helical conductors is changed by numbers of turns. That is, pitch intervals Lp1, Lp2,... are made longer accrding as going downward from the upper part or the antenna. In this antenna consisting of two helical conductors 5 and 6, the high frequency power supplied from the lower part of the antenna by a coaxial cable is converted from an unbalanced power to a balanced power through a U balun 2, and currents having opposite phases flow to two helical conductors. Currents supplied from the upper end part of the antenna are attenuated while radiating circularly polarized waves in desired directions on the way of flow to the lower end. Consequently, a high circularly polarized wave gain is obtained in a wide range.
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Patent Agency Ranking
公开(公告)号：JPS6436202A
公开(公告)日：1989-02-07
申请号：JP19211587
申请日：1987-07-31
Applicant: NEC CORP
Inventor： KURAMOTO AKIO , KOSUKEGAWA KAZUO
Abstract: PURPOSE:To attain satellite tracking simply and inexpensively by providing a bias line provided to impress a bias voltage to a diode and turning on/off the diode so as to switch a forming direction of a pencile beam. CONSTITUTION:In impressing a bias voltage to the base, a diode 7 is turned on/off and the tip of both the stubs 6 is short-circuited or opened. The impedance of both the stubs 6 viewed from a transformer 9 in this state is capacitive for one and inductive for the other. The line impedances Zs, Zk of both the stubs 6 are selected so that the absolute value of the capacitive and inductive impedances is equal to each other and the impedance Zt based thereupon is used to allow the transformer 9 to take matching the impedance Z0 of main lines 12a, 12b. That is, the diode 7 is driven by the switch to obtain two different exciting phase quantity and the maximum radiation direction of the antenna (forming direction of pencil beam) is switched into +theta and -theta with respect to the reference axis without moving the antenna of its own. Then the switching drive of the diode 7 is applied at a high speed, then high speed switching is attained.
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公开(公告)号：JPS63207206A
公开(公告)日：1988-08-26
申请号：JP3976587
申请日：1987-02-23
Applicant: NEC CORP
Inventor： KURAMOTO AKIO
Abstract: PURPOSE:To make a using frequency band width into a wide band by providing a conductor at the prescribed forward position of an annular radiator and widening the flat area of a return loss characteristic. CONSTITUTION:An annular frame part 7a is the one in which the outer circumference shape is the same as the outer circumference shape of a radiator 1 and the size of the outer shape is the same or a little smaller. A shorting shaft part 7b shorts and connects the prescribed inner circumferential position section as the annular frame part 7 is divided into two and the shaft width comes to be the approximately equal width as the frame width of the frame part 7a. An annular conductor 7 composed of such the annular frame part 7a and the shorting shaft part 7b causes the forming direction of the shorting shaft part 7b to be consistent with the electric field direction of the radiation electromagnetic field and is provided at the prescribed forward position of the said radiator, for example, the position of an about 0.6 wave length. As the result, since the annular conductor 7 works as a compensating circuit to suppress the quick change of the reactance of an input impedance, the flat area of the return loss characteristic is extended.
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公开(公告)号：JPS63127608A
公开(公告)日：1988-05-31
申请号：JP27429886
申请日：1986-11-18
Applicant: NEC CORP
Inventor： KURAMOTO AKIO
Abstract: PURPOSE:To facilitate the installation of a simple mobile station by tilting a floor of a bed of a car body at a free angle to ground and fixing a plane antenna to the bed so as to eliminate the need for a direction adjustment of the antenna. CONSTITUTION:The plane antenna 2 is fitted fo the front (seat side) of a bed 3 whose elevating angle to ground is varied. An array antenna of a microstrip punch antenna using a printed circuit board in pace of a parabolic antenna is used. As to the direction of the antenna, the bed 3 is tilted by a desired angle with respect to ground and the antenna has only to be matched in the direction of a satellite, then the azimuth direction is the direction of the driver's seat of the truck 1 and the elevating angle of the bed is adjusted with respect to the elevating direction.
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公开(公告)号：JP2009212660A
公开(公告)日：2009-09-17
申请号：JP2008051881
申请日：2008-03-03
Applicant: Nec Corp , Shibaura Institute Of Technology , 学校法人 芝浦工業大学 , 日本電気株式会社
Inventor： TAMAOKI NAOYA , YAMAMOTO SHIO , HARADA TAKASHI , KURAMOTO AKIO , IWASAKI HISAO
Abstract: PROBLEM TO BE SOLVED: To provide an antenna which has affinity with the body higher than those of conventional types, and further, suppresses loss due to the body.
SOLUTION: Plane conductive cloth 20 having flexibility has an arrow-shaped slit 10 and includes a bottom edge open portion 12, where a bottom end of a base line portion 13 of the slit 10 is made open and a tip umbrella-shaped portion formed of an umbrella-shaped portion 14 at a tip portion 11 of the base line portion 13. The conductive cloth 20 has the bottom edge open portion 12 and a short-circuit portion 21, the short-circuit portion 21 is outside the tip umbrella-shaped portion of the arrow-shaped slit 10 and is shaped that short-circuits both-side portions of the base line portion 13 of the arrow-shaped portion to a width equal to or smaller than the slit width. The antenna has a power reception/feeding portion 30 receiving and feeding electric power between conductive materials on both sides of the base line portion 13 of the arrow-shaped slit 10 so as to exhibit an antenna function.
COPYRIGHT: (C)2009,JPO&INPITAbstract translation: 要解决的问题：提供一种与常规类型相比具有高于人体亲和力的天线，并且进一步抑制由于身体造成的损失。 解决方案：具有柔性的平面导电布20具有箭形狭缝10，并且包括底边开口部分12，其中狭缝10的基线部分13的底端被打开，并且尖端的伞形 在基线部分13的尖端部分11处由伞形部分14形成的部分。导电布20具有底部边缘开口部分12和短路部分21，短路部分21在尖端 形状为箭形狭缝10的伞形部分，并且成形为将箭头形部分的基线部分13的两侧部分短于等于或小于狭缝宽度的宽度。 天线具有在箭头状狭缝10的基线部分13的两侧的导电材料之间接收和馈送电力以便呈现天线功能的受电/馈送部分30。 版权所有（C）2009，JPO＆INPIT
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公开(公告)号：JP2009194832A
公开(公告)日：2009-08-27
申请号：JP2008036025
申请日：2008-02-18
Inventor： KURAMOTO AKIO
Abstract: PROBLEM TO BE SOLVED: To provide an antenna which has a planar thin shape and a wideband, is capable of power feeding without using direct soldering and keeps a matching characteristic excellent even near a human body. SOLUTION: The antenna includes two radiation elements 10, 30 which have approximately the same shape and are plate-shaped and a band-like element 50 of which one terminal portion is connected to at least one of the two radiation elements. The two radiation elements are disposed while being deviated in such a way that a first side of one radiation element and a second side of the other radiation element are made parallel and both the sides are partially opposed to each other. The two radiation elements become approximately line-symmetric when moved parallely from the layout so that the first and second sides are opposed to each other parallely. One terminal part of the band-like element is connected to a side, other than the first or second side of at least one of the two radiation element, another terminal part is opened, and the two radiation elements are supplied with power at such predetermined positions that the first and second sides are partially opposed to each other. COPYRIGHT: (C)2009,JPO&INPIT
Abstract translation: 要解决的问题：为了提供具有平面薄形状和宽带的天线，能够在不使用直接焊接的情况下进行供电，并且在人体附近保持优异的匹配特性。 解决方案：天线包括具有大致相同形状并且是板形的两个辐射元件10,30和一个端子部分连接到两个辐射元件中的至少一个的带状元件50。 两个辐射元件被布置成同时偏离，使得一个辐射元件的第一侧和另一个辐射元件的第二侧被制成平行并且两个侧面彼此部分地相对。 当从布局平行移动时，两个辐射元件变得大致线对称，使得第一和第二侧彼此平行地相对。 带状元件的一个端子部分连接到除了两个辐射元件中的至少一个辐射元件的第一或第二侧之外的另一个端子部分打开的一侧，并且两个辐射元件以这种预定的功率被供电 第一和第二面彼此部分相对的位置。 版权所有（C）2009，JPO＆INPIT
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