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公开(公告)号：US4890076A
公开(公告)日：1989-12-26
申请号：US183983
申请日：1988-04-20
申请人： Kazutada Higashi , Masamori Tokuda , Hiroshi Nakano , Tomozo Ohta
发明人： Kazutada Higashi , Masamori Tokuda , Hiroshi Nakano , Tomozo Ohta
CPC分类号： H03C1/60 , H03C7/027 , H03C2200/0033 , H03C2200/007
摘要： The SSB modulator according to the present invention is comprised of a driving voltage generator, a diode, a bias supply circuit, an impedance transformation circuit and an input/output terminal. The SSB modulator is arranged such that the impedance of the diode is changed by changing the driving voltage impressed across the diode, resulting in the mismatching of the impedance, which leads to generation of a reflected wave. Therefore, by changing the amplitude and the phase of the above-obtained reflected wave, SSB modulation is effected. Accordingly, the SSB modulator of the present invention, requiring no particular side band filter, is compact in size, light in weight and low in manufacturing cost, with a simple structure of the circuit.
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公开(公告)号：US5346300A
公开(公告)日：1994-09-13
申请号：US907137
申请日：1992-07-01
CPC分类号： H01Q11/08
摘要： A first radiation member 165 includes radiation conductors 166 and 167, an arm 168 and a lower connection piece 169 all integrally formed by blanking. A stub 170 is likewise integrally formed on radiation conductor 166. A second radiation member 171 includes radiation conductors 172 and 173, an arm 174 and a lower connection piece 175 all integrally formed by blanking. A stub 176 is likewise integrally formed on radiation conductor 173. A first loop comprised of radiation conductors 167 and 172, arms 168 and 174 and lower connection pieces 169 and 175 exhibits capacitive impedance at a wavelength for use. The overall length of a second loop comprised of radiation conductors 166 and 173, arms 168 and 174 and lower connection pieces 169 and 175 is set equal to that of the first loop. The second loop, however, exhibits inductive impedance at the wavelength for use by adjustment of the length of stubs 170 and 176. Adjusting stubs 170 and 176 enable control of a phase of a current flowing through the second loop.
摘要翻译： 第一辐射构件165包括通过消隐一体形成的辐射导体166和167，臂168和下连接件169。 短截线170同样整体地形成在辐射导体166上。第二辐射构件171包括辐射导体172和173，臂174和下连接件175，所述臂174和下连接片175通过消隐整体形成。 短截线176同样整体地形成在辐射导体173上。由辐射导体167和172，臂168和174以及下连接片169和175组成的第一回路在使用的波长处表现出电容性阻抗。 包括辐射导体166和173，臂168和174以及下连接件169和175的第二回路的总长度被设定为等于第一回路的总长度。 然而，第二回路在波长处显示出通过调整短截线170和176的长度来使用的电感阻抗。调节短线170和176使得能够控制流经第二回路的电流的相位。
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公开(公告)号：US4654888A
公开(公告)日：1987-03-31
申请号：US735753
申请日：1985-05-20
申请人： Tomozo Ohta , Hiroshi Nakano
发明人： Tomozo Ohta , Hiroshi Nakano
CPC分类号： H03D9/0616
摘要： An image suppression mixer of the waveguide type is disclosed which includes a waveguide signal input terminal at one end of a waveguide, a local oscillation input terminal at the other end of the waveguide, a mixer diode inserted within the waveguide and an IF signal output terminal connected to the mixer diode. At least the width of the waveguide on the side of the waveguide signal input terminal is selected to be a cutoff dimension for the image frequencies f.sub.m and the local oscillation frequency f.sub.1 the waveguide signal frequencies f.sub.2, the local oscillation frequency f.sub.1 and the image frequencies f.sub.m are correlated as f.sub.m
摘要翻译： 公开了一种波导型图像抑制混频器，其包括在波导的一端处的波导信号输入端，波导另一端的本地振荡输入端，插入波导内的混频二极管和IF信号输出端 连接到混频二极管。 至少波导信号输入端侧波导的宽度被选择为图像频率fm和本地振荡频率f1的截止尺寸，波导信号频率f2，本地振荡频率f1和图像频率fm 与fm
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公开(公告)号：US4594556A
公开(公告)日：1986-06-10
申请号：US632105
申请日：1984-07-18
申请人： Tomozo Ohta
发明人： Tomozo Ohta
IPC分类号： H03D3/00
CPC分类号： H03D3/005
摘要： A demodulation circuit for frequency modulated signals according to this invention comprises a variable phase shifter supplied with inputted FM signals, a narrow band pass filter having a band width narrower than that of the Curson band for the FM signals, a frequency discriminator, a filter allowing specific frequency components among the FM detected signals detected by the frequency discriminator to pass, and a phase adjuster to said frequency components, wherein said inputted FM signals are passed through said variable phase shifter said narrow band pass filter and then FM detected by said frequency discriminator, a portion of the detected output signals is passed through said filter allowing to pass the specific frequency components and the phase adjuster, thereafter, the phase shifter is controlled by said signals, the phase of the FM signals is controlled by the phase shifter in the direction of compressing the frequency deviation for said specific demodulated frequency components in the FM signals, and detected signals from said frequency discriminator are taken out.
摘要翻译： 根据本发明的用于频率调制信号的解调电路包括提供输入的FM信号的可变移相器，具有比用于FM信号的Curson频带窄的带宽的窄带通滤波器，频率鉴别器，允许 由鉴频器检测的FM检测信号中的特定频率分量通过，以及相位调节器到所述频率分量，其中所述输入的FM信号通过所述可变移相器的所述窄带通滤波器，然后由所述频率鉴别器检测到的FM 检测到的输出信号的一部分通过所述滤波器允许通过特定频率分量和相位调节器，此后，移相器由所述信号控制，FM信号的相位由相位移器在 压缩所述特定解调频率分量的频率偏差的方向 在FM信号中，并且从所述鉴频器检测到的信号被取出。
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公开(公告)号：US20050156806A1
公开(公告)日：2005-07-21
申请号：US10505129
申请日：2003-02-20
申请人： Tomozo Ohta , Hiroshi Nakano , Tohru Izaki
发明人： Tomozo Ohta , Hiroshi Nakano , Tohru Izaki
CPC分类号： G06K7/10346 , G06K7/10178 , G06K7/10336
摘要： An RFID system (10) has an interrogator (11), an interrogator antenna (12) connected to the interrogator (11), for transmitting a signal, a radio wave reflecting plate (21) reflecting the signal transmitted from the interrogator antenna (12) and including a part of a parabolic curve or a curve similar thereto, and a radio frequency tag (13) responding an receiving the signal from the interrogator antenna (12) via at least the radio wave reflecting plate (21) and communicating with the interrogator (11). A signal having passed without being applied to the radio frequency tag (13) is reflected toward the inside of the radio wave reflecting plate (21) by the radio wave reflecting plate (21). Therefore, the signal is prevented from scattering, so that the signal from the interrogator antenna (12) is effectively utilized.
摘要翻译： RFID系统（10）具有询问器（11），连接到询问器（11）的询问器天线（12），用于发送信号;电波反射板（21）反映从询问器天线（12 ），并且包括抛物线曲线或类似曲线的一部分，以及响应于至少通过无线电波反射板（21）从询问器天线（12）接收信号并与其通信的射频标签（13） 询问器（11）。 没有施加到射频标签（13）的信号已被无线电波反射板（21）反射到无线电波反射板（21）的内部。 因此，防止信号散射，从而有效地利用来自询问器天线（12）的信号。
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公开(公告)号：US5642103A
公开(公告)日：1997-06-24
申请号：US267291
申请日：1994-06-14
申请人： Masamori Tokuda , Hiroshi Nakano , Tomozo Ohta
发明人： Masamori Tokuda , Hiroshi Nakano , Tomozo Ohta
IPC分类号： G01S13/74 , G01S7/02 , G01S13/75 , G06K17/00 , G06K19/07 , G06K19/077 , G07B15/06 , G07C9/00 , H04B1/59 , H04B7/26 , H04W4/04 , H04Q7/00
CPC分类号： G07B15/063 , G01S13/756 , G01S7/024 , G06K19/0723 , G06K19/07703 , G07C9/00111
摘要： A transponder used in a remote identification system requiring an interrogator and a transponder. The transponder which is thin and compact includes a transmit/receive antenna which is thin for receiving an interrogating signal and a rewrite signal emitted from the interrogator, and for emitting a response signal towards the interrogator. There is a modulator/demodulator for modulating a signal according to a code inherent in the transponder to emit the same from the antenna as the response signal without newly applying energy to the interrogating signal, and for demodulating the rewrite signal. A controller for applying a modulating signal generated according to the inherent code to the modulator/demodulator and for storing a signal demodulated by the modulator/demodulator. A liquid crystal display is used for displaying data including bar codes which can be read by a bar code reader. The bar code can be rewritten.
摘要翻译： 用于需要询问器和应答器的远程识别系统中的应答器。 薄而紧凑的应答器包括发送/接收天线，该发射/接收天线很薄以用于接收询问信号和从询问器发射的重写信号，并且向询问器发射响应信号。 存在用于根据应答器固有的代码来调制信号的调制器/解调器，从天线发射相同的响应信号，而不向接收信号新施加能量，并且解调重写信号。 一种用于将根据固有码产生的调制信号施加到调制器/解调器并用于存储由调制器/解调器解调的信号的控制器。 液晶显示器用于显示可由条形码读取器读取的包括条形码的数据。 条形码可以重写。
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17.发明授权Portable data processing device capable of transmitting processed data on a radio by reflection of unmodulated carrier signal externally applied 失效便携式数据处理装置能够通过外部未调制载波信号的反射在无线电装置上发送处理的数据
公开(公告)号：US5313211A
公开(公告)日：1994-05-17
申请号：US741608
申请日：1991-08-07
申请人： Masamori Tokuda , Hiroshi Nakano , Tomozo Ohta
发明人： Masamori Tokuda , Hiroshi Nakano , Tomozo Ohta
CPC分类号： G01S13/756 , G01S13/825 , G01S7/024 , G06F15/0225 , G06K7/0008
摘要： A detachable IC card applicable to a portable data processing device referred to as an "electronic organizer" is disclosed. The IC card is formed of microstrip lines formed on a dielectric substrate. An antenna receives an externally applied unmodulated carrier signal and guides the received signal to microstrip lines for impedance conversion. Cathode potential of a diode is varied in response to a data signal outputted from a CPU, so that the barrier capacitance of the diode varies. Accordingly, the carrier is reflected according to the data signal and radiated toward the electronic organizer main body through the antenna. An oscillator for data transmission is not required in the IC card, so that an internal battery having a large capacitance is not required, either. As a result, without increasing the size and weight of the device, radio transmission of data from the IC card can be accomplished.
摘要翻译： 公开了适用于称为“电子管理器”的便携式数据处理装置的可拆卸IC卡。 IC卡由形成在电介质基板上的微带线形成。 天线接收外部施加的未调制载波信号，并将接收到的信号引导到微带线以进行阻抗转换。 二极管的阴极电位响应于从CPU输出的数据信号而变化，使得二极管的势垒电容变化。 因此，载体根据数据信号反射并通过天线朝向电子组织器主体辐射。 IC卡不需要用于数据传输的振荡器，因此也不需要具有大电容的内部电池。 结果，在不增加设备的尺寸和重量的情况下，可以实现来自IC卡的数据的无线电传输。
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公开(公告)号：US5021790A
公开(公告)日：1991-06-04
申请号：US522581
申请日：1990-05-14
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, in which an identification tag is made smaller in size and lighter in weight to considerably improve the convenience in a setting operation for use in many applications. The apparatus can be applied for production control within a factory or can be used to recognize whether a person wearing an identification tag has entered or left a room.
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公开(公告)号：US4563651A
公开(公告)日：1986-01-07
申请号：US370795
申请日：1982-04-22
申请人： Tomozo Ohta , Yoshio Tsutsumi , Yoshihiro Konishi
发明人： Tomozo Ohta , Yoshio Tsutsumi , Yoshihiro Konishi
摘要： The threshold level for demodulating an FM signal, for instance a television picture signal, has been improved or lowered by adaptively restricting the bandwidth of the signal using an adaptive bandpass filter, and therefore, the picture quality and/or S/N ratio of the demodulated television signal has been improved. The adaptive bandpass filter has enough bandwidth when the signal level is sufficiently higher than the threshold level, but is narrow when the signal level is close to or lower than the threshold level. The bandwidth of the adaptive bandpass filter is adjusted according to the total power of the input FM signal and C/N (the carrier signal to noise) ratio. The improvement of the threshold level is almost 2 dB.
摘要翻译： 通过使用自适应带通滤波器自适应地限制信号的带宽，已经改善或降低了用于解调FM信号（例如电视图像信号）的阈值电平，因此，图像质量和/或S / N比 解调后的电视信号得到改善。 当信号电平足够高于阈值电平时，自适应带通滤波器具有足够的带宽，而当信号电平接近或低于阈值电平时，该带宽较窄。 自适应带通滤波器的带宽根据输入FM信号的总功率和C / N（载波信号对噪声）的比例进行调整。 阈值水平的提高几乎为2 dB。
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公开(公告)号：US4531148A
公开(公告)日：1985-07-23
申请号：US474677
申请日：1983-02-18
申请人： Tomozo Ohta , Yoshio Tsutsumi , Motoshi Sugano
发明人： Tomozo Ohta , Yoshio Tsutsumi , Motoshi Sugano
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. A variable bandpass filter (8), the center frequency and the bandwidth of which are controllable, for improving C/N, is inserted at the output of a reference bandpass filter (7) 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). Said color sub-carrier component is derived by a narrow-band bandpass filter (10) coupled with the output of said discriminator (9) for controlling the center frequency of the variable bandpass filter (8).
摘要翻译： PCT No.PCT / JP81 / 00206 Sec。 371日期1983年2月18日 102（e）1983年2月18日日期PCT提交1981年8月31日PCT公布。 出版物WO83 / 00973 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FM信号路径中的参考带通滤波器（7）的输出处插入用于改善C / N的中心频率和带宽可控的可变带通滤波器（8）。 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。 所述彩色副载波分量由与所述鉴频器（9）的输出耦合的窄带带通滤波器（10）导出，用于控制可变带通滤波器（8）的中心频率。
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