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公开(公告)号：US5406224A
公开(公告)日：1995-04-11
申请号：US111120
申请日：1993-08-24
申请人： Seishin Mikami , Masao Kodera , Junshi Utsu
发明人： Seishin Mikami , Masao Kodera , Junshi Utsu
CPC分类号： H03F1/56 , H03F1/086 , H03F3/1935
摘要： A high-frequency amplifier has a semiconductor element for amplifying a high-frequency signal, an input matching circuit connected to an input side of the semiconductor element, and an output matching circuit connected to an output side of the semiconductor element. A stabilizing circuit is connected to at least one of a signal input path between the input matching circuit and the semiconductor element, and a signal output path between the semiconductor element and the output matching circuit. The stabilizing circuit includes a first element having a first end which is short-circuited with respect to a high frequency, a parallel resonant circuit connected in series with a second end of the first element and performing parallel resonance at an operating frequency of the high-frequency amplifier, and a second element connected to a side of the parallel resonant circuit which is opposite to the first element. Values of the first element and the second element are chosen so that an admittance of the high-frequency amplifier which occurs at a frequency of possible oscillation of the high-frequency amplifier will be within a constant-conductance circle in a Smith chart which denotes a stable condition of the high-frequency amplifier.
摘要翻译： 高频放大器具有用于放大高频信号的半导体元件，连接到半导体元件的输入侧的输入匹配电路和连接到半导体元件的输出侧的输出匹配电路。 稳定电路连接到输入匹配电路和半导体元件之间的信号输入路径中的至少一个以及半导体元件和输出匹配电路之间的信号输出路径。 稳定电路包括第一元件，第一元件具有相对于高频短路的第一端，与第一元件的第二端串联连接的并联谐振电路，并以高频率的工作频率执行并联谐振， 频率放大器和连接到与第一元件相对的并联谐振电路的一侧的第二元件。 选择第一元件和第二元件的值，使得在高频放大器的可能振荡的频率处出现的高频放大器的导纳将在史密斯圆图中位于恒定电导圈内，该史密斯圆图表示 高频放大器的稳定状态。
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2.发明授权Variable reactance circuit for microwave or millimeter wave band and variable matching circuit using variable reactance circuit 失效用于微波或毫米波段的可变电抗电路和使用可变电抗电路的可变匹配电路
公开(公告)号：US5343172A
公开(公告)日：1994-08-30
申请号：US997305
申请日：1992-12-23
申请人： Junsi Utsu , Seishin Mikami , Masao Kodera
发明人： Junsi Utsu , Seishin Mikami , Masao Kodera
摘要： Series reactance elements constituted by capacitors are connected to an input side corresponding to the gate electrode of an amplifying FET and an output side corresponding to the drain electrode of the amplifying FET, respectively. Parallel variable reactance circuits are connected to the input and output sides, respectively. Each variable reactance circuit includes a FET, where the source electrodes of the FET are connected to the input and output sides through MIM capacitors, respectively. Additionally, drain electrodes of the FETs are grounded through inductive loads which are constituted by spiral inductors, respectively. The source electrodes of the FETs constituting the variable reactance circuits are grounded through choke coils, respectively. The drain electrodes of the FETs receive control bias voltages through the choke coils, respectively. In this case, each of the resistive components of the spiral inductors is set to have a value which can cancel the negative resistive component of the corresponding FET.
摘要翻译： 由电容器构成的串联电抗元件分别连接到与放大FET的栅电极对应的输入侧和与放大FET的漏电极对应的输出侧。 并联可变电抗电路分别连接到输入和输出侧。 每个可变电抗电路包括FET，其中FET的源电极分别通过MIM电容器连接到输入和输出侧。 此外，FET的漏极分别通过由螺旋电感器构成的感性负载接地。 构成可变电抗电路的FET的源电极分别通过扼流线圈接地。 FET的漏电极分别通过扼流线圈接收控制偏置电压。 在这种情况下，螺旋电感器的电阻分量中的每一个被设定为具有能够抵消对应的FET的负电阻分量的值。
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公开(公告)号：US4893129A
公开(公告)日：1990-01-09
申请号：US284730
申请日：1988-12-15
申请人： Masao Kodera , Seishin Mikami
发明人： Masao Kodera , Seishin Mikami
CPC分类号： H01Q21/065 , H01Q21/0075
摘要： In a planar array antenna in which radio frequency power fed by a feeder line is radiated from a plurality of radiation elements disposed in a planar state on one surface of a dielectric substrate on the other surface of which the feeder line is disposed, the feeder line has a first feeder part and a second feeder part. The first feeder part is spaced apart by a predetermined distance from the marginal contour of one of the radiation elements in the planar direction of the dielectric substrate, while the second feeder part is located within the width of the marginal contour of another one of the radiation elements and directly beneath the latter radiation element, and the second feeder part is divided into two parts with respective ends thereof confronting each other, the power coupling coefficient between the second feeder part and said another one radiation element is selected to be larger than that between the first feeder part and said one of the radiation elements, thereby making the planar array antenna operate with high radiation efficiency and small side lobes.
摘要翻译： 在平面阵列天线中，馈电线路所馈送的射频功率是从设置在平面状态的多个辐射元件辐射在介质基片的一个表面上的另一个表面上放置馈电线的馈电线 具有第一馈送部分和第二馈送部分。 第一馈电部分在电介质基板的平面方向上与辐射元件之一的边缘轮廓隔开预定的距离，而第二馈电部分位于另一个辐射的边缘轮廓的宽度内 并且第二馈送部分被分成两部分，其相应的端部彼此面对，第二馈送部分和所述另一个辐射元件之间的功率耦合系数被选择为大于第二馈送部分之间的功率耦合系数 第一馈电部分和所述一个辐射元件，从而使得平面阵列天线以高辐射效率和小的旁瓣工作。
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公开(公告)号：US5016017A
公开(公告)日：1991-05-14
申请号：US447905
申请日：1989-12-08
申请人： Masao Kodera , Kunihiko Sasaki , Seishin Mikami , Jyunshi Utsu
发明人： Masao Kodera , Kunihiko Sasaki , Seishin Mikami , Jyunshi Utsu
CPC分类号： G01S13/60
摘要： A Doppler radar speed detecting method in which periods of a Doppler signal are measured within a predetermined sampling time, and frequency data corresponding to the thus obtained period data are obtained. Upper and lower limit values are set based on the previous Doppler frequency F(k-1). The frequency data are compared with these limit values. Frequency data within a low region lower than the lower limit value, and intermedaite region between the lower and upper limit values, and a high region higher than the upper limit value are respectively counted in accordance with the comparison. Further, for the frequency data between the lower and upper limits, an integrated value of differences between these data and the previous Doppler frequency is obtained. From these integrated value and the numbers of frequency data, the change from the previous to the present Doppler frequency is calculated. By adding this change and the previous Doppler frequency together, the present Doppler frequency is obtained.
摘要翻译： 一种多普勒雷达速度检测方法，其中在预定采样时间内测量多普勒信号的周期，并且获得与由此获得的周期数据相对应的频率数据。 上下限值基于先前的多普勒频率F（k-1）来设定。 频率数据与这些极限值进行比较。 根据比较，分别对低于下限值的低区域内的频率数据和下限值和上限值之间的中间区域以及高于上限值的高区域进行计数。 此外，对于下限和上限之间的频率数据，获得这些数据与先前多普勒频率之间的差的积分值。 从这些积分值和频率数据的数量，计算从先前到现在的多普勒频率的变化。 通过将该改变和先前的多普勒频率相加，获得当前的多普勒频率。
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公开(公告)号：US4636997A
公开(公告)日：1987-01-13
申请号：US697006
申请日：1985-01-31
申请人： Keiichiro Toyama , Masao Kodera , Kunihiko Sasaki
发明人： Keiichiro Toyama , Masao Kodera , Kunihiko Sasaki
CPC分类号： G01S15/931 , B60Q9/008 , G01S7/521 , G10K11/28 , Y10S367/909
摘要： An ultrasonic transducer comprises a cylindrical housing embedded within a rear bumper of a vehicle and opening backward, a reflecting plate having a parabolic reflecting surface provided within the cylindrical housing along a closed end thereof and facing an open end thereof, and an ultrasonic vibrator provided in an upper wall of the housing at the focus of the reflecting plate for emitting and receiving ultrasonic waves. The ultrasonic transducer transmits ultrasonic waves behind the vehicle and receives ultrasonic waves reflected from an obstacle. The ultrasonic transducer further comprises a projecting member provided on the inner wall of the housing along the open end thereof for dispersing and cancelling the ultrasonic waves entering the housing at angles with respect to the axis of the housing. The projecting member has a smoothly curving cross section having a radius of substantially one fourth to five times the wavelength of the ultrasonic waves emitted by the ultrasonic vibrator.
摘要翻译： 一种超声波换能器包括嵌入在车辆的后保险杠内并向后打开的圆柱形壳体，反射板具有抛物面反射表面，该抛物面反射表面沿其封闭端设置在圆柱形壳体内并面向其开口端;以及超声波振动器， 在反射板的焦点处的壳体的上壁用于发射和接收超声波。 超声波换能器在车辆后方传递超声波，接收从障碍物反射的超声波。 超声波换能器还包括沿着开口端设置在壳体的内壁上的突出构件，用于以相对于壳体的轴线成角度分散和抵消进入壳体的超声波。 突出构件具有平滑弯曲的横截面，该横截面的半径大致是由超声波振动器发射的超声波的波长的四分之一至五倍。
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公开(公告)号：US4404541A
公开(公告)日：1983-09-13
申请号：US279014
申请日：1981-06-30
申请人： Masao Kodera , Sigeyuki Akita , Yasuhisa Yoshino
发明人： Masao Kodera , Sigeyuki Akita , Yasuhisa Yoshino
CPC分类号： G01S15/931 , B60Q9/008 , Y10S367/909
摘要： A rear obstacle detecting system for automotive vehicles includes an ultrasonic transmitter/receiver unit, distance detecting unit and an indicator for measuring distance to an obstacle while a vehicle is in backward movement. The ultrasonic transmitter/receiver unit having a ultrasonic vibrator is always energized as long as the vehicle is in an operating condition irrespective of whether the vehicle is in a backward movement or not, in order to maintain the ultrasonic vibrator being vibrated to achieve a self-cleaning function. The indicator is energized only when the vehicle is in backward movement.
摘要翻译： 用于机动车辆的后部障碍物检测系统包括超声波发射器/接收器单元，距离检测单元和用于在车辆向后移动时测量与障碍物的距离的指示器。 具有超声波振动器的超声波发射器/接收器单元总是通电，只要车辆处于工作状态，无论车辆是否处于向后运动，为了保持超声波振动器的振动， 清洁功能。 仅当车辆向后运动时，指示器才通电。
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公开(公告)号：US5311186A
公开(公告)日：1994-05-10
申请号：US71619
申请日：1993-06-04
申请人： Jyunshi Utsu , Masao Kodera , Kunihiko Sasaki
发明人： Jyunshi Utsu , Masao Kodera , Kunihiko Sasaki
CPC分类号： G07C9/00111 , G01S13/825 , G06K7/0008
摘要： The invention relates to a transponder for a vehicle identification device in which a radio wave including vehicle information returned from transponders provided in a vehicle is received by an interrogator. The vehicle transponder receives a query radio wave and uses a detection device to generate a previously memorized coded signal train in response to a received wave. The coded signal train varies an amount of bias voltage of the detection device so that a reflection coefficient of the detection device is varied to modulate the reflection wave of the query radio wave and the modulated wave is transmitted back to the interrogator.
摘要翻译： 本发明涉及一种用于车辆识别装置的应答器，其中包括从车辆中提供的转发器返回的车辆信息的无线电波由询问器接收。 车辆应答器接收询问无线电波，并且使用检测装置响应于接收到的波而产生先前存储的编码信号序列。 编码信号串改变检测装置的偏置电压量，使得检测装置的反射系数发生变化，以调制查询无线电波的反射波，并将调制波传送回询问器。
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公开(公告)号：US4467313A
公开(公告)日：1984-08-21
申请号：US320568
申请日：1981-11-12
申请人： Yasuhisa Yoshino , Masao Kodera , Hajime Ito , Hisatoshi Ohta
发明人： Yasuhisa Yoshino , Masao Kodera , Hajime Ito , Hisatoshi Ohta
CPC分类号： G08G1/16 , Y10S367/909
摘要： An automotive rear safety checking apparatus which comprises a plurality of obstacle detectors mounted on the rear part of the automobile for radiating ultrasonic wave on the watching areas smaller in width than the width of the automobile respectively and detecting the ultrasonic wave reflected from an obstacle. The ultrasonic wave is radiated from the obstacle detectors in time division. Pulse signals in the number associated with the distance between the obstacle detector and the obstacle are generated in response to the detection of the ultrasonic wave reflected from the obstacle, so that the relative positions of the automobile and the obstacle, are indicated two-dimensionally in accordance with the pulse signal.
摘要翻译： 一种汽车后部安全检查装置，其包括安装在汽车后部的多个障碍物检测器，用于在比汽车宽度小的观察区域上散发超声波，并且检测从障碍物反射的超声波。 超声波从障碍物检测器以时分方式辐射。 响应于从障碍物反射的超声波的检测，生成与障碍物检测器和障碍物之间的距离相关联的数字中的脉冲信号，使得汽车和障碍物的相对位置被二维地指示 符合脉冲信号。
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公开(公告)号：US4524356A
公开(公告)日：1985-06-18
申请号：US401023
申请日：1982-07-22
申请人： Masao Kodera , Shigeyuki Akita , Yasuhisa Yoshino
发明人： Masao Kodera , Shigeyuki Akita , Yasuhisa Yoshino
CPC分类号： G01S15/931 , Y10S367/909
摘要： An obstacle monitoring device for the rear of a vehicle comprising a plurality of ultrasonic obstacle detectors which are operated sequentially at a predetermined time interval, and an electronic monitor for supplying the obstacle detectors with their operational timing sequences at the predetermined time intervals and for determining distance information for each detector based on the changing pulse width of electric currents for each of the obstacle detectors within a particular time interval, which pulse widths correspond to the distance between an obstacle and the rear of the vehicle. A single transmission line connects the obstacle detectors with the monitor so that the number of wires in a wire-harness is reduced between the obstacle detectors (outside the vehicle) and the monitor (inside the vehicle).
摘要翻译： 一种用于车辆后部的障碍物监视装置，包括以预定时间间隔顺序操作的多个超声波障碍物检测器，以及电子监视器，用于以预定时间间隔向障碍物检测器提供其操作定时序列，并用于确定距离 基于在特定时间间隔内针对每个障碍物检测器的电流的脉冲宽度变化的每个检测器的信息，哪个脉冲宽度对应于障碍物与车辆后部之间的距离。 单个传输线将障碍物检测器与监视器连接，使得在障碍物检测器（车辆外部）和监视器（车辆内部）之间线束中的电线数量减少。
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公开(公告)号：US4486868A
公开(公告)日：1984-12-04
申请号：US305358
申请日：1981-09-24
申请人： Masao Kodera , Sigeyuki Akita
发明人： Masao Kodera , Sigeyuki Akita
CPC分类号： B06B1/06
摘要： An ultrasonic wave conversion apparatus comprises electrodes, a support member for supporting the electrodes, a vibrator secured to the support member by a securing member, and a moving diaphragm fixed to the vibrator by a fixing member. The surface of portions of the electrodes, the vibrator, the moving diaphragm and the fixing member are coated with an insulating film of a predetermined thickness. The coating with this insulating film provides the apparatus with an excellent insulating and anticorrosive property and further an excellent damping characteristic for the vibration of the vibrating members of the apparatus.
摘要翻译： 超声波转换装置包括电极，用于支撑电极的支撑构件，通过固定构件固定到支撑构件的振动器和通过固定构件固定到振动器的移动振动器。 电极，振动器，移动隔膜和固定构件的部分的表面涂覆有预定厚度的绝缘膜。 具有这种绝缘膜的涂层为设备提供优异的绝缘和防腐性能，并且对于装置的振动部件的振动进一步具有优异的阻尼特性。
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