公开(公告)号：US07557761B2

公开(公告)日：2009-07-07

申请号：US12015005

申请日：2008-01-16

申请人： Hiroshi Iwai ,  Atsushi Yamamoto ,  Tsutomu Sakata ,  Toshiteru Hayashi ,  Kenichi Yamada

发明人： Hiroshi Iwai ,  Atsushi Yamamoto ,  Tsutomu Sakata ,  Toshiteru Hayashi ,  Kenichi Yamada

IPC分类号： H01Q1/24

CPC分类号： H01Q1/521 ,  H01Q5/321 ,  H01Q9/30 ,  H01Q21/28

摘要： An array antenna apparatus includes a first feeding element having a first feed point, a second feeding element having a second feed point, and a first parasitic element electrically connected to the respective first and second feeding elements. In a first frequency band, respective resonances in the feeding elements occur independent of each other, by eliminating electromagnetic mutual coupling between the feeding elements, and exciting the first feeding element through the first feed point as well as exciting the second feeding element through the second feed point. In a second frequency band lower than the first frequency band, a loop antenna having a certain electrical length is formed by the first and second feeding elements and the first parasitic element, and a resonance of the loop antenna substantially occurs by exciting the first feeding element through the first feed point.

摘要翻译： 阵列天线装置包括具有第一馈电点的第一馈电元件，具有第二馈电点的第二馈电元件以及电连接到相应的第一和第二馈电元件的第一寄生元件。 在第一频带中，通过消除馈电元件之间的电磁互耦，并且通过第一馈电点激励第一馈电元件以及通过第二馈电元件激励第二馈电元件，馈送元件中的相应谐振彼此独立地发生， 饲料点 在低于第一频带的第二频带中，具有一定电长度的环形天线由第一和第二馈电元件和第一寄生元件形成，并且环形天线的谐振基本上通过激励第一馈电元件 通过第一个饲料点。

公开(公告)号：US07528674B2

公开(公告)日：2009-05-05

申请号：US10594522

申请日：2006-01-24

申请人： Akira Kato ,  Koichi Ogawa ,  Hiroshi Iwai ,  Atsushi Yamamoto

发明人： Akira Kato ,  Koichi Ogawa ,  Hiroshi Iwai ,  Atsushi Yamamoto

IPC分类号： H03H7/38

CPC分类号： H04B1/18

摘要： There is provide a mobile radio apparatus capable of suppressing a mismatching loss, and increasing a transmission/reception sensitivity by means of instantly and adaptively matching the impedance between the antenna and the transmission/reception circuit whatever situation a mobile radio apparatus, such as a mobile phone or the like, may be. In a mobile radio apparatus (1), when starting control of the matching circuit (102), a control section (105) evaluates an initial chromosome stored in a storage section (106), and if there is an initial chromosome for providing an impedance matching, controls the matching circuit (102) so as to have a load value corresponding to this initial chromosome. If there is no initial chromosome for providing the impedance matching, the control section (105) evolves the initial chromosome with a genetic algorithm, derives a chromosome for providing the impedance matching, and controls the matching circuit (102) so as to have a load value corresponding to the derived chromosome.

摘要翻译： 提供一种能够抑制失配损失的移动无线电设备，并且通过立即且自适应地匹配天线和发送/接收电路之间的阻抗来增加发送/接收灵敏度，无论移动无线电设备如移动 电话等，可能是。 在移动无线电设备（1）中，当启动匹配电路（102）的控制时，控制部分（105）评估存储在存储部分（106）中的初始染色体，并且如果存在用于提供阻抗的初始染色体 匹配，控制匹配电路（102）以具有对应于该初始染色体的负载值。 如果没有用于提供阻抗匹配的初始染色体，则控制部分（105）用遗传算法演化初始染色体，导出染色体以提供阻抗匹配，并且控制匹配电路（102）以具有负载 对应于衍生染色体的值。

公开(公告)号：US20080062065A1

公开(公告)日：2008-03-13

申请号：US11889742

申请日：2007-08-16

申请人： Atsushi Yamamoto ,  Hiroshi Iwai ,  Tsutomu Sakata

发明人： Atsushi Yamamoto ,  Hiroshi Iwai ,  Tsutomu Sakata

IPC分类号： H01Q1/50

CPC分类号： H01Q19/30 ,  H01Q1/243 ,  H01Q19/32

摘要： A MIMO antenna apparatus includes a plurality of feeding antenna elements, a parasitic element electromagnetically coupled to each feeding antenna element, and a variable impedance load element connected to the parasitic element. A signal level comparator circuit detects received signal levels of received wireless signals and compares the received signal levels with each other, and thus detects the minimum received signal level. A controller controls an impedance value of the variable impedance load element based on the received signal levels detected by the signal level comparator circuit, such that the received signal level of the wireless signal having the minimum received signal level is substantially maximized.

摘要翻译： MIMO天线装置包括多个馈电天线元件，电磁耦合到每个馈电天线元件的寄生元件和连接到寄生元件的可变阻抗负载元件。 信号电平比较器电路检测接收到的无线信号的接收信号电平，并将接收信号电平彼此进行比较，从而检测最小接收信号电平。 控制器基于由信号电平比较器电路检测到的接收信号电平来控制可变阻抗负载元件的阻抗值，使得具有最小接收信号电平的无线信号的接收信号电平基本上最大化。

公开(公告)号：US20070280297A1

公开(公告)日：2007-12-06

申请号：US11806821

申请日：2007-06-04

申请人： Toshifumi Nakatani ,  Hiroshi Iwai

发明人： Toshifumi Nakatani ,  Hiroshi Iwai

IPC分类号： H04H1/04

CPC分类号： H04B7/0822

摘要： Reception signals received by first to fourth antennas 11 to 14 are sequentially selected one by one repeatedly in accordance with first to fourth switches 31 to 34 being controlled by first to fourth switch control circuits 41 to 44, respectively, so as to be inputted to a signal shaping section 60. The reception signals having been shaped by the signal shaping section 60 are sampled by a sample-and-hold section 71 and AD-converted by an AD converter 72 in accordance with a time at which the reception signals are sequentially selected. The resultant signals are converted into parallel signals by a serial-parallel conversion section 73. Thus, the parallel signals are obtained as the reception signals of the first to the fourth antennas 11 to 14.

摘要翻译： 根据第一至第四开关31至34分别由第一至第四开关控制电路41至44控制的第一至第四天线11至14接收的接收信号被依次逐个选择，以被输入到 信号整形部60。 已经由信号整形部分60整形的接收信号由采样保持部分71采样，并且由AD转换器72根据接收信号被依次选择的时间进行AD转换。 所得到的信号通过串行 - 并行转换部分73转换成并行信号。 因此，获得并行信号作为第一至第四天线11至14的接收信号。

公开(公告)号：US06906677B2

公开(公告)日：2005-06-14

申请号：US09866996

申请日：2001-05-25

申请人： Atsushi Yamamoto ,  Hiroshi Iwai ,  Koichi Ogawa

发明人： Atsushi Yamamoto ,  Hiroshi Iwai ,  Koichi Ogawa

IPC分类号： H01Q1/00 ,  H01Q9/04 ,  H01Q9/30 ,  H01Q13/18 ,  H01Q19/00 ,  H01Q21/29 ,  H01Q1/42

CPC分类号： H01Q9/0457 ,  H01Q1/007 ,  H01Q9/0407 ,  H01Q9/30 ,  H01Q13/18 ,  H01Q19/00 ,  H01Q21/29

摘要： An antenna has a conductive bottom member; a conductive side member; and a conductive member arranged in a space surrounded by the bottom member and the side member, wherein the conductive member is connected to a signal line for transmission and/or reception.

摘要翻译： 天线具有导电底部构件; 导电侧构件; 以及布置在由所述底部构件和所述侧部构件包围的空间中的导电构件，其中所述导电构件连接到用于发射和/或接收的信号线。

公开(公告)号：US06850205B2

公开(公告)日：2005-02-01

申请号：US10629786

申请日：2003-07-30

申请人： Atsushi Yamamoto ,  Hiroshi Iwai ,  Koichi Ogawa

发明人： Atsushi Yamamoto ,  Hiroshi Iwai ,  Koichi Ogawa

IPC分类号： H01Q13/02 ,  H01Q13/08 ,  H01Q13/18 ,  H01Q19/00 ,  H01Q13/00

CPC分类号： H01Q13/08 ,  H01Q13/02 ,  H01Q13/18 ,  H01Q19/005

摘要： A waveguide antenna apparatus is provided including a rectangular waveguide having one end short-circuited by a terminating conductor and another end opened. The rectangular waveguide includes a grounding conductor and a ceiling conductor opposed to each other, and includes two side surface conductors joining the grounding conductor with the ceiling conductor and being opposed to each other. An antenna element has one end and another end, where one end thereof is connected with a position in the ceiling conductor in a vicinity of opened another end of the rectangular waveguide, and another end thereof is connected with a feeding portion located in the grounding conductor. The ceiling conductor includes a removed portion on the side of opened another end of the rectangular waveguide. Then an electromagnetic wave of a fed radio signal is radiated from the removed portion and opened another end of the rectangular waveguide.

摘要翻译： 提供了一种波导天线装置，包括一个矩形波导，其一端由端接导体短路，另一端打开。 矩形波导包括彼此相对的接地导体和天花板导体，并且包括将接地导体与天花板导体接合并且彼此相对的两个侧面导体。 天线元件具有一端和另一端，其一端与矩形波导的开放的另一端附近的天花板导体中的位置连接，另一端与位于接地导体中的馈电部分连接 。 天线导体包括在矩形波导的另一端开放侧的去除部分。 然后从去除部分辐射馈送的无线电信号的电磁波，并打开矩形波导的另一端。

公开(公告)号：US06744163B2

公开(公告)日：2004-06-01

申请号：US10053879

申请日：2002-01-24

申请人： Hidetoshi Kajiwara ,  Hiroshi Iwai

发明人： Hidetoshi Kajiwara ,  Hiroshi Iwai

IPC分类号： H02K706

CPC分类号： H02K7/06

摘要： A vibration type brushless motor A1 in a structure of brushless motor having an outer rotor type core is composed of a shaft 3 of which a bottom end 3a is held by a bearing member 6 so as to rotate freely and a top end 3b is fixed to a center of rotation of a rotor yoke 1, a ring core 4 arranged around the shaft 3 and a rotor yoke 1 having a side section 1b of which a part is cut off radially to the outer circumference direction from the center fixed with the top end 3b of the shaft 3, wherein a semi-annular magnet 2 is fixed to the rotor yoke 1 along the side section 1b with facing the ring core 4.

摘要翻译： 具有外转子型铁心的无刷电动机的结构中的振动型无刷电动机A1由轴3构成，轴3的下端3a被轴承部件6保持以自由旋转，顶端3b固定在 转子轭铁1的旋转中心，绕轴3配置的环形铁心4和转子轭铁1，转子轭铁1具有侧面部分1b，该侧面部分1b从固定有顶端的中心沿着外周方向径向切除 3b，其中半环形磁体2沿着侧面1b与环形铁芯4相对固定到转子轭铁1上。

公开(公告)号：US06633261B2

公开(公告)日：2003-10-14

申请号：US09988716

申请日：2001-11-20

申请人： Hiroshi Iwai ,  Atsushi Yamamoto ,  Koichi Ogawa ,  Shinji Kamaeguchi ,  Tsukasa Takahashi ,  Kenichi Yamada

发明人： Hiroshi Iwai ,  Atsushi Yamamoto ,  Koichi Ogawa ,  Shinji Kamaeguchi ,  Tsukasa Takahashi ,  Kenichi Yamada

IPC分类号： H01Q138

CPC分类号： H01Q1/243 ,  H01Q9/0421

摘要： An antenna is provided which can reconcile a low antenna resonance frequency and broadband frequency characteristics, while attaining stable impedance characteristics and enhanced design flexibility. A conductive plate is coupled to a conductive base plate via a first metal lead. A voltage is applied to the conductive plate from a supply point via a second metal lead. A conductive wall is electrically coupled to the conductive plate at one end thereof. An electromagnetic field coupling adjustment plate is electrically coupled to the other end of the conductive wall. The electromagnetic field coupling adjustment plate is disposed so as to leave a predetermined interspace between itself and the conductive base plate, thereby creating a capacitor in conjunction with the conductive base plate. The conductive wall and the electromagnetic field coupling adjustment plate are disposed so as to maximize a path length from a shot-circuiting portion (at which the conductive plate is coupled to the first metal lead) to an open end of the electromagnetic field coupling adjustment plate. Preferably, a current path extending from a supply portion (at which the conductive plate is coupled to the second metal lead) to the short-circuiting portion has a length equal to a ½ wavelength for a desired resonance frequency.

摘要翻译： 提供一种能够调和低天线谐振频率和宽带频率特性的天线，同时获得稳定的阻抗特性和增强的设计灵活性。 导电板通过第一金属引线耦合到导电基板。 电压通过第二金属引线从供电点施加到导电板。 导电壁在其一端电耦合到导电板。 电磁场耦合调节板电耦合到导电壁的另一端。 电磁场耦合调节板被设置成在其与导电基板之间留出预定的间隙，从而与导电基板一起形成电容器。 导电壁和电磁场耦合调节板被设置成使从射出电路部分（导电板耦合到第一金属引线的）到电磁场耦合调节板的开口端的路径长度最大化 。 优选地，从供电部分（其中导电板耦合到第二金属引线）延伸到短路部分的电流路径具有等于所需谐振频率的1/2波长的长度。

公开(公告)号：US06538618B2

公开(公告)日：2003-03-25

申请号：US09975517

申请日：2001-10-12

申请人： Atsushi Yamamoto ,  Hiroshi Iwai ,  Koichi Ogawa

发明人： Atsushi Yamamoto ,  Hiroshi Iwai ,  Koichi Ogawa

IPC分类号： H01Q142

CPC分类号： H01Q13/18 ,  H01Q9/0421 ,  H01Q9/30 ,  H01Q9/38 ,  H01Q13/10 ,  H01Q13/106

摘要： An antenna is provided having a relatively simple structure as arranged capable of operating at desired frequencies. The antenna has a chassis having a grounding conductor provided as a bottom surface, a ceiling conductor provided as a top surface opposite to the grounding conductor, and side conductors provided as antenna sides. At least one opening is provided in a part of said chassis, which opens for radiation of electric waves. A feeding point provided on the grounding conductor for connection to a power supply via a predetermined feeding line from the outside. An antenna element connected to the feeding point at one end while being connected to the ceiling conductor via a frequency selectable circuit at the other end, and surrounded by the side conductors.

摘要翻译： 提供具有相对简单结构的天线，其布置能够以期望的频率运行。 该天线具有底架，其具有设置为底面的接地导体，设置为与接地导体相对的顶表面的天花板导体，以及设置为天线侧的侧导体。 至少一个开口设置在所述底盘的一部分中，该开口用于电波的辐射。 馈电点设置在接地导体上，用于经由外部经过预定馈线从电源连接。 天线元件在一端连接到馈电点，同时通过另一端的频率可选择电路连接到天花板导体，并被侧导体包围。

公开(公告)号：US06114911A

公开(公告)日：2000-09-05

申请号：US275385

申请日：1999-03-24

申请人： Hiroshi Iwai ,  Kaoru Ishida ,  Hiroaki Kosugi ,  Takashi Enoki ,  Youichi Morinaga

发明人： Hiroshi Iwai ,  Kaoru Ishida ,  Hiroaki Kosugi ,  Takashi Enoki ,  Youichi Morinaga

IPC分类号： H01P5/10 ,  H03F3/195 ,  H03F3/21 ,  H03F3/26 ,  H03F3/60 ,  H03F3/68

CPC分类号： H03F3/602 ,  H03F3/211

摘要： A power amplifier has an input signal splitting part for splitting the input signal into two output signals each having equal power and phase difference of 180 degrees with respect to each other. A first signal on-off selection part for switching conduction of one of the output signals. A first amplifying part for amplifying the signal from the first signal on-off selection part. A second signal on-off selection part for switching conduction of the signal outputted from the first amplifying part. A second amplifying part for amplifying the other of the output signals from the input signal splitting part. An output signal combining part for providing a phase difference of 180 degrees between the output of the second signal on-off selection part and the output of the second amplifying part and combining them. A bias on-off part for switching on and off at least the first amplifying part, wherein, when the output level is high, the first and second signal on-off selection parts are turned on and, at the same time, the first and second amplifying parts are turned on by the bias on-off part, so that push-pull operation is performed, and when the output level is low, the first and second signal on-off selection parts are turned off and the first amplifying part is turned off by the bias on-off part and the second amplifying part performs single-ended operation.

摘要翻译： 功率放大器具有用于将输入信号分离成两个输出信号的输入信号分离部件，每个输出信号具有彼此相等的功率和相位差为180度的相位差。 第一信号开关选择部分，用于切换输出信号之一的导通。 用于放大来自第一信号开 - 关选择部分的信号的第一放大部分。 第二信号开关选择部分，用于切换从第一放大部分输出的信号的导通。 第二放大部分，用于放大来自输入信号分离部分的另一个输出信号。 输出信号组合部分，用于在第二信号开关选择部分的输出和第二放大部分的输出之间提供180度的相位差，并将它们组合。 用于至少对第一放大部分进行导通和截止的偏压开关部分，其中，当输出电平较高时，第一和第二信号开 - 关选择部分被接通，同时第一和第 第二放大部分由偏置开 - 关部分导通，从而执行推挽操作，并且当输出电平低时，第一和第二信号开 - 关选择部分被关断，第一放大部分是 由偏置开 - 关部分关断，第二放大部分执行单端操作。