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公开(公告)号：US4991228A
公开(公告)日：1991-02-05
申请号：US500215
申请日：1990-03-28
申请人： Tomozo Ohta , Masao Miyazaki , Naoki Okamoto
发明人： Tomozo Ohta , Masao Miyazaki , Naoki Okamoto
CPC分类号： H03D9/06 , H05K1/0284 , H05K1/05 , H05K1/14 , H05K1/181
摘要： A microwave converter comprises circuit components formed on the outer surfaces of a three-dimensional body. The inner surfaces of the body constitute a grounding surface. A local oscillator is disposed on one of the inner surfaces. The three-dimensional body may be an electrically conductive body having a hollow space in which the local oscillator is disposed.
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2.发明授权System for measuring position by using global positioning system and receiver for global position system 失效通过使用全球定位系统和全球定位系统接收器测量位置的系统
公开(公告)号：US5434787A
公开(公告)日：1995-07-18
申请号：US866021
申请日：1992-04-08
申请人： Naoki Okamoto , Takeshi Okamoto , Masao Miyazaki , Tomozo Ohta
发明人： Naoki Okamoto , Takeshi Okamoto , Masao Miyazaki , Tomozo Ohta
IPC分类号： G01S19/09 , G07C5/00 , G07C5/08 , G06F165/00
CPC分类号： G01S19/09 , G07C5/008 , G07C5/0858
摘要： A GPS position measuring system includes at least one mobile station and a base station associated with the mobile station. The mobile station is provided with an antenna for receiving one or more GPS signals from the corresponding GPS satellites, an amplifying and frequency converting circuit for amplifying the received signal and converting the amplified GPS signal into a signal on an IF band, an analog-to-digital converter for converting the signal on the IF band into a digital signal, and a writing unit for writing the digital signal into a memory card in order to transfer the digital signal to the base station.
摘要翻译： GPS位置测量系统包括至少一个移动站和与移动站相关联的基站。 移动台设置有用于从相应的GPS卫星接收一个或多个GPS信号的天线，放大和频率转换电路，用于放大接收到的信号并将放大的GPS信号转换成IF频带上的信号，模拟到 用于将IF频带上的信号转换为数字信号的数字转换器，以及用于将数字信号写入存储卡以将数字信号传送到基站的写入单元。
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公开(公告)号：US5228036A
公开(公告)日：1993-07-13
申请号：US683454
申请日：1991-04-10
申请人： Naoki Okamoto , Masao Miyazaki , Tomozo Ohta
发明人： Naoki Okamoto , Masao Miyazaki , Tomozo Ohta
CPC分类号： H04J3/0608
摘要： A frame synchronization stabilizer for stabilizing frame synchronization of received data has a generation circuit for generating a reference pattern which is the same as a predetermined frame synchronization pattern contained in data being transmitted. The stabilizer further has a comparison circuit for comparing, bit by bit, a data pattern in a synchronization pattern area of each frame of the received data with the reference pattern from the generation circuit. The comparison circuit outputs a mismatch pulse each time when a mismatch bit is detected by the comparison, and outputs a match pulse each time when it is detected that the data pattern is fully matched with the reference pattern. The number of the mismatch pulses from the comparison circuit is counted by a first counter. The first counter outputs an out-of frame detection signal when a counted value exceeds a particular value and is reset based upon the match pulse from the comparison circuit.
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公开(公告)号：US5025261A
公开(公告)日：1991-06-18
申请号：US464141
申请日：1990-01-16
申请人： Tomozo Ohta , Hiroshi Nakano , Masao Miyazaki
发明人： Tomozo Ohta , Hiroshi Nakano , Masao Miyazaki
CPC分类号： G08G1/13 , G01C21/26 , G01S19/42 , G01S5/0009 , G08G1/137
摘要： A mobile navigation system using a communication system between at least one mobile object and a key station. The navigation system includes a unit mounted on the mobile object for determining the position of the mobile object, and a unit mounted on the mobile object for transmitting data representative of the determined position to the key station via the communication system. The navigation system further includes a data base unit mounted in the key station for storing map data, a unit mounted in the key station for deriving map data of an area including the position of the mobile object from the data base unit, in response to the transmitted position data, a unit mounted in the key station for transmitting data including the derived map data to the mobile object via the communication system, and a unit mounted on the mobile object for displaying a composite image composed of the position data of the mobile object and the map data, in response to the transmitted data from the key station.
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公开(公告)号：US5289506A
公开(公告)日：1994-02-22
申请号：US842540
申请日：1992-02-27
IPC分类号： H03J7/06 , H04L27/00 , H04L27/227 , H04L27/06
CPC分类号： H04L27/2273 , H03J7/065 , H04L2027/003 , H04L2027/0073
摘要： An AFC circuit stabilizes the frequency of an intermediate frequency signal to be applied to a demodulation circuit. A frequency conversion circuit responds to a local oscillation signal generated from a voltage-controlled oscillation circuit to convert the frequency of a digital modulation signal and applies the converted frequency to the demodulation circuit. A carrier reproduction circuit in the demodulation circuit reproduces the carrier of the intermediate frequency signal to output a synchronizing detection signal. The frequency of the reproduced carrier is frequency-divided by a frequency dividing circuit. A frequency division output thereof is counted by a counter for a definite period. Data is outputted from a microprocessor in response to a count output of the counter and the synchronizing detection signal, and the data is then converted into an AFC voltage by a D/A converter. The converted voltage is supplied as a control voltage to the voltage-controlled oscillation circuit. A stable intermediate frequency signal can be obtained by frequency-dividing the frequency of the carrier and counting the frequency division output thereof.
摘要翻译： AFC电路使要施加到解调电路的中频信号的频率稳定。 频率转换电路响应于从压控振荡电路产生的本地振荡信号，以转换数字调制信号的频率，并将转换的频率应用于解调电路。 解调电路中的载波再现电路再现中频信号的载波以输出同步检测信号。 再现载波的频率由分频电路分频。 其分频输出由计数器计数一定时间。 响应于计数器的计数输出和同步检测信号，从微处理器输出数据，然后通过D / A转换器将数据转换成AFC电压。 将转换的电压作为控制电压提供给压控振荡电路。 可以通过对载波的频率进行分频并对其分频输出进行计数来获得稳定的中频信号。
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公开(公告)号：US5278514A
公开(公告)日：1994-01-11
申请号：US935118
申请日：1992-08-27
申请人： Takahiro Chihara , Masao Miyazaki , Tomozo Ohta
发明人： Takahiro Chihara , Masao Miyazaki , Tomozo Ohta
IPC分类号： H04L27/14 , H04L27/227 , H04L27/233
CPC分类号： H04L27/2338 , H04L27/227
摘要： An MSK signal demodulating circuit including a carrier reproducing circuit for reproducing a carrier phase-synchronized with a component of a mark frequency or a space frequency of an MSK signal, a detector for performing synchronous detection of the MSK signal by means of the reproduced carrier, an identification circuit for converting an analog output from this detector into serial digital data, and a serial-parallel conversion circuit for converting the serial digital data into I, Q parallel data.
摘要翻译： 一种MSK信号解调电路，包括用于再现与MSK信号的标记频率或空间频率的分量相位同步的载波的载波再现电路，用于通过再现的载波执行MSK信号的同步检测的检测器， 用于将来自该检测器的模拟输出转换为串行数字数据的识别电路，以及用于将串行数字数据转换成I，Q并行数据的串并转换电路。
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公开(公告)号：US5107522A
公开(公告)日：1992-04-21
申请号：US650016
申请日：1991-02-04
申请人： Takamitsu Kitayama , Masao Miyazaki , Tomozo Ohta
发明人： Takamitsu Kitayama , Masao Miyazaki , Tomozo Ohta
CPC分类号： H03J7/065 , H04L2027/003 , H04L2027/0073
摘要： An AFC circuit stabilizes the frequency of an intermediate frequency signal to be applied to a demodulation circuit. A frequency conversion circuit responds to a local oscillation signal generated from a voltage-controlled oscillation circuit to convert the frequency of a digital modulation signal and applies the converted frequency to the demodulation circuit. A carrier reproduction circuit in the demodulation circuit reproduces the carrier of the intermediate frequency signal to output a synchronizing detection signal. The frequency of the reproduced carrier is frequency-divided by a frequency dividing circuit. A frequency division output thereof is counted by a counter for a definite period. Data is outputted from a microprocessor in response to a count output of the counter and the synchronizing detection signal, and the data is then converted into an AFC voltage by a D/A converter. The converted voltage is supplied as a control voltage to the voltage-controlled oscillation circuit. A stable intermediate frequency signal can be obtained by frequency-dividing the frequency of the carrier and counting the frequency division output thereof.
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公开(公告)号：US4712111A
公开(公告)日：1987-12-08
申请号：US813535
申请日：1985-12-26
申请人： Tomozo Ohta , Kazutada Higashi , Hirohiko Yamamoto
发明人： Tomozo Ohta , Kazutada Higashi , Hirohiko Yamamoto
CPC分类号： H01Q25/001 , H01Q19/132
摘要： An antenna system includes a reflector which is a part of a paraboloid of revolution or parabolic cylinder, a primary radiator for clockwise circularly polarized wave, and a primary radiator for counterclockwise circularly polarized wave. The reflector is of geometrically asymmetrical shape to effect different reflection properties for clockwise and counterclockwise circular polarizations. The primary radiators are fixed at two different positions in the vicinity of the focus of the paraboloid reflector.
摘要翻译： 天线系统包括反转器，其是旋转抛物面抛物面抛物面的一部分，用于顺时针圆偏振波的主辐射器和用于逆时针圆偏振波的初级辐射器。 反射器具有几何不对称的形状，以实现顺时针和逆时针圆偏振的不同反射特性。 主辐射器固定在抛物面反射器焦点附近的两个不同位置。
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公开(公告)号：US4527187A
公开(公告)日：1985-07-02
申请号：US413386
申请日：1982-08-23
申请人： Tomozo Ohta
发明人： Tomozo Ohta
摘要： The present invention relates to the improved demodulation system which improves the noise characteristics for the demodulation of a wideband television FM signal. An adapter for improving the ratio C/N is provided at the output of a bandpass filter (7), and the output of said adapter is applied to a discriminator (14) which demodulates the FM signal, through a limiter (13). The adapter has a variable bandpass filter (8), the center frequency and the bandwidth of which are controllable, and said variable bandpass filter (8) is inserted in an FM signal path. The bandwidth of the variable bandpass filter (8) is controlled so that said bandwidth is wide when the input carrier level is high, and said bandwidth is narrow when the input carrier level is low. The center frequency of the variable bandwidth filter (8) is controlled so that said center frequency follows to the instantaneous frequency of the color sub-carrier component (3.58 MHz). A phase detector (10) is coupled with the input and the output of said variable bandpass filter (8) in order to derive the color sub-carrier component, and the output of said phase detector controls said variable bandpass filter through a narrow-band bandpass filter.
摘要翻译： PCT No.PCT / JP81 / 00207 Sec。 371日期1982年8月23日 102（e）日期1982年8月23日PCT提交1981年8月31日PCT公布。 出版物WO83 / 00974 日本1983年3月17日。本发明涉及改进用于解调宽带电视FM信号的噪声特性的改进的解调系统。 在带通滤波器（7）的输出处提供用于提高比率C / N的适配器，并且所述适配器的输出被施加到通过限幅器（13）解调FM信号的鉴频器（14）。 适配器具有可变带通滤波器（8），其中心频率和带宽是可控的，并且所述可变带通滤波器（8）插入FM信号路径中。 控制可变带通滤波器（8）的带宽，使得当输入载波电平高时，所述带宽宽，并且当输入载波电平低时，所述带宽窄。 控制可变带宽滤波器（8）的中心频率，使得所述中心频率遵循彩色副载波分量（3.58MHz）的瞬时频率。 相位检测器（10）与所述可变带通滤波器（8）的输入端和输出端耦合，以便导出彩色副载波分量，并且所述相位检测器的输出通过窄带控制所述可变带通滤波器 带通滤波器
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公开(公告)号：US4926182A
公开(公告)日：1990-05-15
申请号：US55363
申请日：1987-05-29
CPC分类号： G01S13/765 , G01S13/78 , G01S13/825 , G06K19/0723 , G06K7/0008 , G07C3/00 , G07C9/00111
摘要： A microwave data transmission apparatus adapted to transmit and receive information by microwaves, which the identification tag is made smaller in size and lighter in weight to considerably improve the convenience in setting operation for use in many applications, can be applied for the production control within the factory or the control for entering and leaving the room by a person having an identification tag.
摘要翻译： 一种微波数据传输装置，其适用于通过微波发送和接收信息，识别标签的尺寸更小，重量更轻，从而大大提高了许多应用中使用的设置操作的便利性，可应用于内部的生产控制 工厂或由具有识别标签的人进出房间的控制。
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