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1. 发明申请

US20180337016A1 SLOW WAVE CIRCUIT AND TRAVELING WAVE TUBE 审中-公开
公开(公告)号：US20180337016A1
公开(公告)日：2018-11-22
申请号：US15777977
申请日：2016-12-14
申请人： NEC Network and Sensor Systems, Ltd.
发明人： Norio MASUDA , Takashi NAKANO
IPC分类号： H01J23/24 , H01J25/42 , H01P3/123 , H01P11/00
CPC分类号： H01J23/24 , H01J23/28 , H01J25/42 , H01P3/123 , H01P11/002
摘要： Provided are a slow wave circuit and a traveling wave tube suitable for an increase in fineness with regard to processing beam holes, and suitable for higher frequencies. A slow wave circuit (10) includes a meandering waveguide (1) and a beam hole (2) that pierces the meandering waveguide (1), and the cross-section of the beam hole (2) in the direction orthogonal to the long direction is in the shape of a polygon having a larger number of sides than a quadrilateral.

2. 发明申请

US20160293376A1 TRAVELING WAVE TUBE 审中-公开
标题翻译：旅行波纹管
公开(公告)号：US20160293376A1
公开(公告)日：2016-10-06
申请号：US14868522
申请日：2015-09-29
申请人： NEC Network and Sensor Systems, Ltd.
发明人： Takashi NAKANO
IPC分类号： H01J23/24 , H01J25/34
CPC分类号： H01J23/24 , H01J25/34
摘要： When a plurality of amplifiers for transmission source are used, a related traveling wave tube requires a large space for arranging a plurality of the traveling wave tubes. In this respect, a traveling wave tube of an exemplary embodiment of the present invention includes two meander-shaped waveguides formed to have the same meander pitch, wherein the meander-shaped waveguides are assembled together such that beam holes of one of the meander-shaped waveguides and those of the other one are arranged on the same axis, and one of the meander-shaped waveguides is shifted with respect to the other one by a quarter folding period in the wave traveling direction.
摘要翻译：当使用多个用于发送源的放大器时，相关的行波管需要用于布置多个行波管的大的空间。在这方面，本发明的示例性实施例的行波管包括形成为具有相同曲折间距的两个曲折形波导，其中曲折形波导组装在一起，使得曲折形状波导波导管和另一个的波导管布置在相同的轴线上，并且其中一个曲折波导相对于另一个弯曲波导在波浪传播方向上相移四分之一的折叠周期。

3. 发明申请

US20160127156A1 ADAPTIVE EQUALIZATION PROCESSING CIRCUIT AND ADAPTIVE EQUALIZATION PROCESSING METHOD 有权
标题翻译：自适应均衡处理电路和自适应均衡处理方法
公开(公告)号：US20160127156A1
公开(公告)日：2016-05-05
申请号：US14889652
申请日：2014-05-23
申请人： NEC NETWORK AND SENSOR SYSTEMS, LTD.
发明人： Noriaki SUMITA
IPC分类号： H04L25/03
CPC分类号： H04L25/03057 , H04L25/03885 , H04L27/01 , H04L27/38 , H04L2025/03745
摘要： Provided is an adaptive equalization processing circuit with which an adaptive equalization process converges in a stable manner without reducing the transmission efficiency. This adaptive equalization processing circuit is characterized by being equipped with: a demodulation means that demodulates a received signal, and generates and outputs a training signal; an adaptive equalization processing means that uses a tap coefficient (generated using the received signal or the training signal) to perform an adaptive equalization process for removing waveform distortion in the received signal, and then outputs an equalization output signal; and a selection means that selects the training signal when the adaptive equalization processing means is in a non-convergent state, and inputs the training signal to the adaptive equalization processing means.
摘要翻译：提供了一种自适应均衡处理电路，其中自适应均衡处理以稳定的方式收敛而不降低传输效率。该自适应均衡处理电路的特征在于配备有：解调装置，对接收到的信号进行解调，生成并输出训练信号; 使用抽头系数（使用接收信号或训练信号生成）的自适应均衡处理装置执行用于去除接收信号中的波形失真的自适应均衡处理，然后输出均衡输出信号; 以及选择装置，其在自适应均衡处理装置处于非收敛状态时选择训练信号，并将训练信号输入到自适应均衡处理装置。

4. 发明授权

US12062517B2 Slow-wave circuit, traveling wave tube, and method for manufacturing traveling wave tube 有权
公开(公告)号：US12062517B2
公开(公告)日：2024-08-13
申请号：US16969647
申请日：2019-03-06
申请人： NEC NETWORK AND SENSOR SYSTEMS, LTD.
发明人： Takashi Nakano
IPC分类号： H01J23/16 , H01J23/24 , H01J25/34
CPC分类号： H01J23/24 , H01J23/165 , H01J25/34
摘要： A slow-wave circuit comprises: a waveguide comprising a meander-shaped part that transmits an electromagnetic wave and alternately repeats a first folded part and a second folded part folded onto the opposite side to the first folded part; and a beam hole that transmits an electron beam, extends in a predetermined direction, and penetrates the meander-shaped part, wherein the beam hole penetrates the meander-shaped part so that a part of the beam hole protrudes from the first folded part.

5. 发明授权

US11411744B2 Encryption communication method, information processing apparatus, and program 有权
公开(公告)号：US11411744B2
公开(公告)日：2022-08-09
申请号：US16615543
申请日：2018-05-23
申请人： NEC NETWORK AND SENSOR SYSTEMS, LTD.
发明人： Yuusuke Watanabe
IPC分类号： H04L29/06 , H04L9/32 , H04L9/08 , H04L9/40 , H04L9/14
摘要： (A) An individual one of two or more terminals prepares a set of a first public key and a first private key. (B) One of the two or more terminals creates a set of a second public key and a second private key and distributes the second public key and the second private key to the other terminal(s). (C) One of the two or more terminals creates a shared key by using the corresponding first private key prepared in the (A) and the second public key shared in the (B). (D) A different terminal(s) of the two or more terminals creates a shared key used to communicate with the one terminal by using the second private key shared in the (B) and the first public key of the one terminal prepared in the (A). (E) The set of terminals performs an encryption communication(s) by using the shared keys.

6. 发明申请

US20200020999A1 HIGH FREQUENCY WINDOW AND MANUFACTURING METHOD THEREFOR 审中-公开
公开(公告)号：US20200020999A1
公开(公告)日：2020-01-16
申请号：US16494479
申请日：2018-03-23
申请人： NEC Network and Sensor Systems, Ltd.
发明人： Akihiko KASAHARA , Takashi NAKANO
IPC分类号： H01P1/08
摘要： An invention comprises: a circular waveguide that has a cylindrical section having a circular pipe conduit with a circular shaped cross section, and side wall sections joined to the both sides in an axial direction of the cylindrical section; a first rectangular waveguide that has a first rectangular pipe conduit with a rectangular shaped cross section and that is joined to one of the side wall sections so that the first rectangular pipe conduit communicates with the circular pipe conduit; a second rectangular waveguide that has a second rectangular pipe conduit with a rectangular shaped cross section and that is joined to the other of the side wall sections so that the second rectangular pipe conduit communicates with the circular pipe conduit; and a dielectric plate that is configured as a plate shape, is disposed in the circular pipe conduit, and is airtightly held to the cylindrical section, wherein the circular waveguide has a plastically deformable section that is plastically deformable so that at least the length in an axial direction of the circular waveguide can be changed.

7. 发明申请

US20190280653A1 LINEAR AMPLIFYING DEVICE, INPUT SIGNAL SUPPLYING METHOD, AND ORIGIN AVOIDING CIRCUIT USED THEREIN 审中-公开
公开(公告)号：US20190280653A1
公开(公告)日：2019-09-12
申请号：US16304726
申请日：2017-05-29
申请人： NEC Network and Sensor Systems, Ltd.
发明人： Yasutaka KURODA , Noriaki SUMITA , Takashi ISHIKAWA , Tomohiko OOHASHI , Kazuki KISHI
IPC分类号： H03F1/32 , H03F1/02
摘要： Ringing of a signal after passing through a low pass filter in an LINC type linear amplifier is remedied. A linear amplifying device includes the linear amplifier including the low pass filter for removing high-frequency components; and an origin avoiding circuit which receives an original input signal and is provided upstream of the linear amplifier. If the original input signal is sampled in the vicinity of an origin, the origin avoiding circuit modifies a sampled value so at to replace the sampled value with a fixed value, and supplies the modified input signal to the linear amplifier.

8. 发明授权

US10276339B2 Electron gun, electron tube and high-frequency circuit system 有权
公开(公告)号：US10276339B2
公开(公告)日：2019-04-30
申请号：US15762874
申请日：2016-09-16
申请人： NEC NETWORK AND SENSOR SYSTEMS, LTD.
发明人： Yukihira Nakazato , Eiji Fujiwara
IPC分类号： H01J23/02 , H01J23/08 , H01J23/04 , H01J23/34 , H01J23/065 , H01J23/087 , H01J23/027 , H01J23/06
摘要： The purpose is to make it possible to autonomously suppress a reduction in an electron beam without providing a means for supervising the electron beam intensity of a monitor or the like. An electron gun, provided with: a heater (12) in which one terminal serves as a heater terminal (H) and the other terminal serves as a shared terminal (HK), and in which a low-voltage power supply (21) is connected between the terminals, the heater (12) generating heat due to a current being supplied from the low-voltage power supply (21); and a cathode electrode (11) connected to the shared terminal (HK) and heated by the heater (12) to discharge thermal electrons. A cathode current (Ik) due to the thermal electrons discharged from the cathode electrode (11), and a current (Ih) due to the low-voltage power supply, flow in opposite directions through the heater (12).

9. 发明授权

US09559876B2 Adaptive equalization processing circuit and adaptive equalization processing method 有权
标题翻译：自适应均衡处理电路和自适应均衡处理方法
公开(公告)号：US09559876B2
公开(公告)日：2017-01-31
申请号：US14889652
申请日：2014-05-23
申请人： NEC Network and Sensor Systems, Ltd
发明人： Noriaki Sumita
IPC分类号： H03H7/30 , H04L25/03 , H04L27/01 , H04L27/38
CPC分类号： H04L25/03057 , H04L25/03885 , H04L27/01 , H04L27/38 , H04L2025/03745
摘要： Provided is an adaptive equalization processing circuit with which an adaptive equalization process converges in a stable manner without reducing the transmission efficiency. This adaptive equalization processing circuit is characterized by being equipped with: a demodulation means that demodulates a received signal, and generates and outputs a training signal; an adaptive equalization processing means that uses a tap coefficient (generated using the received signal or the training signal) to perform an adaptive equalization process for removing waveform distortion in the received signal, and then outputs an equalization output signal; and a selection means that selects the training signal when the adaptive equalization processing means is in a non-convergent state, and inputs the training signal to the adaptive equalization processing means.
摘要翻译：提供了一种自适应均衡处理电路，其中自适应均衡处理以稳定的方式收敛而不降低传输效率。该自适应均衡处理电路的特征在于配备有：解调装置，对接收到的信号进行解调，生成并输出训练信号; 使用抽头系数（使用接收信号或训练信号生成）的自适应均衡处理装置执行用于去除接收信号中的波形失真的自适应均衡处理，然后输出均衡输出信号; 以及选择装置，其在自适应均衡处理装置处于非收敛状态时选择训练信号，并将训练信号输入到自适应均衡处理装置。

10. 发明申请

US20220399178A1 MICROWAVE TUBE AND METHOD FOR CONTROLLING THE SAME 有权
公开(公告)号：US20220399178A1
公开(公告)日：2022-12-15
申请号：US17779342
申请日：2020-12-01
申请人： NEC NETWORK AND SENSOR SYSTEMS, LTD.
发明人： Tetsuo MACHIDA
IPC分类号： H01J23/087 , H01J23/06 , H01J23/027
摘要： A microwave tube comprises an electron gun that emits an electron beam; a magnetic circuit that focuses the electron beam emitted from the electron gun; a collector that captures the electron beam that has passed through the magnetic circuit; a high frequency circuit that is spirally arranged around the electron beam focused by the magnetic circuit and that transmits a high frequency; and a magnetic body part arranged around the electron gun so as to be movable in an emission direction of the electron beam, wherein a high frequency output from the high frequency circuit is controlled to be constant by moving the magnetic body part in an emission direction of the electron beam.

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