公开(公告)号：US5969690A

公开(公告)日：1999-10-19

申请号：US896976

申请日：1997-07-18

申请人： Masaaki Yamabayashi ,  Koichi Ogawa ,  Naoki Yuda

发明人： Masaaki Yamabayashi ,  Koichi Ogawa ,  Naoki Yuda

IPC分类号： H01Q1/24 ,  H01Q3/26 ,  H01Q5/15 ,  H01Q9/16 ,  H01Q21/10 ,  H01Q19/00

CPC分类号： H01Q21/10 ,  H01Q1/246 ,  H01Q3/2641 ,  H01Q5/40 ,  H01Q9/16

摘要： Although conventional antennas have characteristics suitable for mobile radio base stations, their vertical dimension is large, and locations of their installation are limited. A radiator for an first upper antenna 32 is arranged in a hollow nonconductive radome 2, using an internal conductor 7a and a metal pipe 10. A radiator for a second lower antenna 34 is arranged in the radome 2, using metal pipes 14 and 15. Two parasitic elements 31 are installed substantially in parallel with the first antenna 32 below a feeding point 9. Two parasitic elements 33 are installed substantially in parallel with the second antenna 34 above a feeding point 13. These allow the tilt angle to be freely set between -10.degree. and +10.degree. by adjusting the parasitic element length and the antenna to be reduced in size.

摘要翻译： 虽然常规天线具有适合于移动无线电基站的特征，但其垂直尺寸大，并且其安装位置受到限制。 第一上天线32的散热器使用内部导体7a和金属管10布置在中空非导电天线罩2中。第二下天线34的散热器使用金属管14和15布置在天线罩2中。 两个寄生元件31在馈电点9的下方与第一天线32基本上平行地安装。两个寄生元件33基本上与馈电点13上方的第二天线34平行地安装。这允许倾斜角度在 -10°和+10°，通过调整寄生元件长度和天线尺寸来减小。

公开(公告)号：US06177911B1

公开(公告)日：2001-01-23

申请号：US08800804

申请日：1997-02-18

申请人： Naoki Yuda ,  Koichi Ogawa ,  Yasuhiro Otomo ,  Hiroyuki Nakamura ,  Masaaki Yamabayashi

发明人： Naoki Yuda ,  Koichi Ogawa ,  Yasuhiro Otomo ,  Hiroyuki Nakamura ,  Masaaki Yamabayashi

IPC分类号： H01Q1900

CPC分类号： H01Q21/10 ,  H01Q1/246 ,  H01Q5/40 ,  H01Q9/145 ,  H01Q9/16

摘要： A narrow and light mobile radio antenna that requires convenient supporting metal fittings provided in a base station is provided. An inner conductor of a coaxial feed line extends upward by a length of ¼ wavelength from the upper end of an outer conductor. This extended inner conductor forms an antenna element. Outside the coaxial feed line, a ¼-wavelength sleeve-like metal pipe made of brass is located with one end connected to the upper end of the outer conductor. On a part of the inner surface of the open end of the metal pipe, an internal thread is formed by tapping. In the open end of the metal pipe, an insulating spacer having an external thread formed around its periphery is inserted. In other words, the insulating spacer is located between the inner wall of the metal pipe and the outer conductor of the coaxial feed line. At the lower end of the coaxial feed line, a coaxial connector for connection with an external circuit is provided.

摘要翻译： 提供了一种需要在基站中提供方便的支撑金属配件的窄而轻的移动无线电天线。 同轴馈线的内导体从外导体的上端向上延伸1/4波长的长度。 该延伸的内部导体形成天线元件。 在同轴馈线以外，由黄铜制成的1/4波长套管状金属管位于一端连接到外导体的上端。 在金属管的开口端的内表面的一部分上，通过攻丝形成内螺纹。 在金属管的开口端插入有围绕其周边形成有外螺纹的绝缘垫片。 换句话说，绝缘间隔件位于金属管的内壁和同轴馈电线的外导体之间。 在同轴馈电线的下端提供用于与外部电路连接的同轴连接器。

公开(公告)号：US09084568B2

公开(公告)日：2015-07-21

申请号：US13387827

申请日：2010-08-05

申请人： Akitoshi Katsumata ,  Koichi Ogawa ,  Tsutomu Yamakawa ,  Masahiro Tsujita ,  Tatsuya Nagano ,  Kazuhide Kitou

发明人： Akitoshi Katsumata ,  Koichi Ogawa ,  Tsutomu Yamakawa ,  Masahiro Tsujita ,  Tatsuya Nagano ,  Kazuhide Kitou

IPC分类号： A61B6/14 ,  A61B6/00 ,  A61B6/03

CPC分类号： A61B6/14 ,  A61B6/037 ,  A61B6/4028 ,  A61B6/469 ,  A61B6/5223

摘要： A radiation imaging apparatus is provided. The apparatus has moving means moving a pair of an X-ray tube and a detector relatively to an object. The apparatus further has means which acquire digital frame data outputted from the detector. The frame data are acquired from the same portion being imaged of the same object at different time points. The apparatus has means which use the frame data to produce a plurality of three-dimensional optimally focused images at the respective time points, an actual position and shape of the portion being imaged being reflected in the images, and means which estimate changes of the plural three-dimensional optimally focused images.

摘要翻译： 提供了一种放射线成像装置。 该装置具有相对于物体移动一对X射线管和检测器的移动装置。 该装置还具有获取从检测器输出的数字帧数据的装置。 从在不同时间点对同一对象成像的相同部分获取帧数据。 该装置具有使用帧数据在各个时间点产生多个三维最佳聚焦图像的装置，被成像部分的实际位置和形状被反映在图像中，以及估计多个图像的变化的装置 三维最佳聚焦图像。

公开(公告)号：US20130170530A1

公开(公告)日：2013-07-04

申请号：US13823428

申请日：2011-09-02

申请人： Yoshishige Yoshikawa ,  Koichi Ogawa

发明人： Yoshishige Yoshikawa ,  Koichi Ogawa

IPC分类号： H04L1/00

CPC分类号： H04L1/0036 ,  H04B7/0682 ,  H04B7/084

摘要： A radio communication device of the present invention comprises a first antenna, a second antenna, a phase varying section which varies a phase of a first RF signal received by or transmitted from the first antenna, and a phase control means which causes the phase varying section to vary a phase amount which is a varied amount of the phase of the first RF signal received by or transmitted from the first antenna. Thus, it is possible to prevent that a size of a device configuration increases and avoid that a reception electric field level is lowered in a localized area.

摘要翻译： 本发明的无线电通信装置包括第一天线，第二天线，改变由第一天线接收或发送的第一RF信号的相位的相变部分，以及相位控制装置，其使相位变化部分 改变作为由第一天线接收或从第一天线发送的第一RF信号的相位的变化量的相位量。 因此，可以防止设备配置的大小增加，并避免局部区域中的接收电场电平降低。

公开(公告)号：US20070182634A1

公开(公告)日：2007-08-09

申请号：US10577685

申请日：2004-10-28

申请人： Atsushi Yamamoto ,  Hiroshi Iwai ,  Koichi Ogawa ,  Shotaro Nishimura ,  Hirotaka Ishihara

发明人： Atsushi Yamamoto ,  Hiroshi Iwai ,  Koichi Ogawa ,  Shotaro Nishimura ,  Hirotaka Ishihara

IPC分类号： H01Q1/38

CPC分类号： H01Q3/242 ,  H01Q3/28 ,  H01Q3/36 ,  H01Q13/06 ,  H01Q21/205

摘要： Four antenna units arranged adjacent to each other are respectively connected to switches, and are connected to load impedance elements via the switches, or connected to an output terminal and a comparator via a switch. Another ends of the load impedance elements are grounded. The comparator judges which antenna unit receives a radio signal having the maximum signal level among the antenna units. A controller controls the switches and the switch so that the antenna unit that receives the radio communication signal having the maximum signal level is connected to the output terminal and the other antenna units are connected to the load impedance elements.

摘要翻译： 彼此相邻布置的四个天线单元分别连接到开关，并且经由开关连接到负载阻抗元件，或者经由开关连接到输出端子和比较器。 负载阻抗元件的另一端接地。 比较器判断哪个天线单元在天线单元中接收到具有最大信号电平的无线电信号。 控制器控制开关和开关，使得接收具有最大信号电平的无线电通信信号的天线单元连接到输出端，而其它天线单元连接到负载阻抗元件。

公开(公告)号：US07161555B2

公开(公告)日：2007-01-09

申请号：US10937621

申请日：2004-09-10

申请人： Takeshi Ohno ,  Koichi Ogawa

发明人： Takeshi Ohno ,  Koichi Ogawa

IPC分类号： H01Q15/08 ,  H01Q13/00

CPC分类号： H01Q9/0485 ,  H01Q21/0075 ,  H01Q21/061

摘要： A dielectric antenna of the present invention includes a pillar-shaped dielectric section for radiating an electromagnetic wave being fed thereto. The dielectric section includes a depressed portion in an upper portion thereof. The vertical cross section of the depressed portion has such a shape that the height of the dielectric section gradually increases toward the side surface of the dielectric section. For example, the depressed portion is a notch having a V-shaped vertical cross section. Alternatively, the depressed portion includes a flat surface portion.

摘要翻译： 本发明的电介质天线包括：柱状电介质部，用于照射供给的电磁波。 电介质部分包括在其上部的凹陷部分。 凹陷部的垂直截面具有这样的形状：电介质部分的高度朝向电介质部分的侧表面逐渐增加。 例如，凹部是具有V形垂直截面的凹口。 或者，凹部包括平坦表面部分。

公开(公告)号：US07088290B2

公开(公告)日：2006-08-08

申请号：US10649723

申请日：2003-08-28

申请人： Takeshi Ohno ,  Koichi Ogawa

发明人： Takeshi Ohno ,  Koichi Ogawa

IPC分类号： H01Q1/38 ,  H01Q5/00 ,  H01Q9/04

CPC分类号： H01Q1/1221 ,  H01Q1/38 ,  H01Q3/24 ,  H01Q9/0485 ,  H01Q13/06 ,  H01Q13/10 ,  H01Q19/06 ,  H01Q21/064

摘要： A dielectric loaded antenna apparatus has a column-shaped loaded dielectric which is loaded on an end portion of a feeding line of the dielectric loaded antenna apparatus. The loaded dielectric has an inclined radiation surface which is inclined from a surface perpendicular to an axial direction of the loaded dielectric. A cross section of the loaded dielectric perpendicular to the axial direction of the loaded dielectric has a shape of one of a circle, ellipse and polygon. The feeding line is a waveguide which includes a radiation waveguide and a feeding waveguide. The radiation waveguide has an axis parallel to the axial direction of the loaded dielectric and includes an opening for feeding an electromagnetic wave to the loaded dielectric. The feeding waveguide feeds the electromagnetic wave to the radiation waveguide.

摘要翻译： 介质负载天线装置具有装载在介质负载天线装置的馈电线的端部上的列状负载电介质。 负载的电介质具有倾斜的辐射表面，其从垂直于所加载的电介质的轴向方向的表面倾斜。 垂直于负载的电介质的轴向的负载介质的横截面具有圆形，椭圆形和多边形之一的形状。 馈电线是包括辐射波导和馈电波导的波导。 辐射波导具有平行于负载的电介质的轴向的轴线，并且包括用于将电磁波馈送到负载的电介质的开口。 馈电波导将电磁波馈送到辐射波导。

公开(公告)号：US07045789B2

公开(公告)日：2006-05-16

申请号：US10381601

申请日：2001-10-01

申请人： Koichi Ogawa ,  Takuzo Takayama

发明人： Koichi Ogawa ,  Takuzo Takayama

IPC分类号： G01T1/164 ,  G01T1/24

CPC分类号： G01T1/2985 ,  A61B6/037 ,  A61B6/4258

摘要： In case of performing so-called “PET acquisition”, a nuclear medical diagnosis apparatus according to the present invention does not set only gamma rays which imparted predetermined energy values (for example, energy values of and above a Compton edge), as subjects for coincidental counting acquisition (coincidence acquisition), but it discriminates also further gamma rays which caused a photoelectric effect after having undergone Compton scattering once in a radiation detection unit, so as to set them as subjects for the coincidental counting acquisition. Concretely, if the added value of energy values observed in two detection elements is “near 511 keV”, the existence of the further gamma ray is presumed, and the acquisition thereof is possible. Besides, that one of the two detection elements as to which energy near the Compton edge is observed can be specified as the incident position of the gamma ray on the radiation detection unit.

摘要翻译： 在进行所谓的“PET采集”的情况下，根据本发明的核医学诊断装置不能仅设定赋予预定能量值（例如，康普顿边缘以上的能量值）的伽马射线，作为 巧合计数采集（重合获取），但是在放射线检测单元中经历了康普顿散射一次之后，还鉴别出引起光电效应的另外的伽马射线，从而将它们设置为重合计数采集的对象。 具体地说，如果在两个检测元件中观察到的能量值的附加值为“接近511keV”，则推测存在另外的伽马射线，并且其获取是可能的。 此外，观察到康普顿边缘附近的能量的两个检测元件中的一个可以被指定为伽马射线在放射线检测单元上的入射位置。

公开(公告)号：US06919845B2

公开(公告)日：2005-07-19

申请号：US10419813

申请日：2003-04-22

申请人： Akihiro Ozaki ,  Koichi Ogawa ,  Yoshio Koyanagi ,  Yutaka Saito ,  Shoichi Kajiwara ,  Yoshitaka Asayama ,  Atsushi Yamamoto

发明人： Akihiro Ozaki ,  Koichi Ogawa ,  Yoshio Koyanagi ,  Yutaka Saito ,  Shoichi Kajiwara ,  Yoshitaka Asayama ,  Atsushi Yamamoto

IPC分类号： G01R29/08 ,  H04B1/38 ,  H02J1/00 ,  G01N22/00 ,  H03C1/52

CPC分类号： G01R29/0857 ,  G01R29/0814 ,  H04B1/3838

摘要： In an apparatus for measuring a specific absorption rate (SAR) for use in a radio apparatus, a first near magnetic field of a radio wave radiated from a reference radio apparatus is measured in free space, and an SAR of the radio wave radiated from the reference radio apparatus by using a predetermined phantom according to a predetermined measurement method. A transformation factor α is calculated by dividing the measured SAR by a square value of the measured first near magnetic field, and a second near magnetic field of a radio wave radiated from a radio apparatus to be measured is measured in free space. Then an SAR of the radio wave radiated from the radio apparatus to be measured is estimated and calculated by multiplying a square value of the measured second near magnetic field by the calculated transformation factor α.

摘要翻译： 在无线电设备中用于测量特定吸收率（SAR）的设备中，在自由空间中测量从参考无线电设备辐射的无线电波的第一近似磁场，并且从所述无线电设备辐射的无线电波的SAR 参考无线电设备，根据预定的测量方法使用预定的体模。 通过将测量的SAR除以测量的第一近似磁场的平方值，并且在自由空间中测量从待测量的无线电设备辐射的无线电波的第二近似磁场来计算变换因子α。 然后通过将测量的第二近似磁场的平方值乘以计算出的变换因子α来估计和计算从待测量的无线电设备辐射的无线电波的SAR。

公开(公告)号：US06917341B2

公开(公告)日：2005-07-12

申请号：US10457482

申请日：2003-06-10

申请人： Hirotaka Ishihara ,  Koichi Ogawa ,  Susumu Inatsugu ,  Tomoyuki Maeda ,  Atsushi Yamamoto

发明人： Hirotaka Ishihara ,  Koichi Ogawa ,  Susumu Inatsugu ,  Tomoyuki Maeda ,  Atsushi Yamamoto

IPC分类号： H01Q9/04 ,  H01Q9/36 ,  H01Q9/00

CPC分类号： H01Q9/36 ,  H01Q9/0421

摘要： A top-loading monopole antenna apparatus having a feeding point is provided for use in a communication system such as a mobile communication system or the like. The top-loading monopole antenna apparatus includes a grounding conductor, a top-loading electrode, a linear conductor element, and a short-circuit conductor. The grounding conductor is provided so as to oppose the grounding conductor. The linear conductor element electrically connects the feeding point with the top-loading electrode, and the short-circuit conductor electrically connects the top-loading electrode through a reactive element. This antenna structure leads to a height which is lower than that of prior art, and easy impedance matching.

摘要翻译： 具有馈电点的顶层负载单极天线装置被提供用于诸如移动通信系统等的通信系统中。 顶装单极天线装置包括接地导体，顶装电极，线导体元件和短路导体。 接地导体设置为与接地导体相对。 线性导体元件将馈电点与顶部负载电极电连接，短路导体通过反应元件将顶部负载电极电连接。 该天线结构导致比现有技术低的高度，并且容易的阻抗匹配。