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公开(公告)号：US20110181460A1
公开(公告)日：2011-07-28
申请号：US10584560
申请日：2007-05-31
申请人： Frederik Olsson , Magnus Karlsson
发明人： Frederik Olsson , Magnus Karlsson
IPC分类号： G01S7/282
摘要： The invention relates to a device for generation of microwaves comprising a virtual cathode oscillator (1) in a coaxial embodiment with an outer cylindrical tube forming a cathode (2) and connected to a transmission line (14) for feeding the cathode (2) with voltage pulses, and an inner cylindrical tube, at least partially transparent for electrons, forming a anode (3) and connected to a waveguide (13) for outputting microwave radiation generated by the formation of a virtual cathode (4) inside an area enclosed by the anode. Through the introduction of electrically conductive structures (5 and 6) a device for generation of microwaves is achieved that demonstrates higher efficiency and higher peak output.
摘要翻译： 本发明涉及一种用于产生微波的装置，其包括在同轴实施例中的虚拟阴极振荡器（1），其中形成阴极（2）的外圆筒形管并连接到用于将阴极（2）馈送到 电压脉冲和内部圆柱形管，对于电子至少部分透明，形成阳极（3）并连接到波导（13），用于输出由虚拟阴极（4）形成的微波辐射，所述微波辐射在由 阳极。 通过引入导电结构（5和6），实现了产生微波的装置，其显示出更高的效率和更高的峰值输出。
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公开(公告)号：US20110050096A1
公开(公告)日：2011-03-03
申请号：US12551110
申请日：2009-08-31
IPC分类号： H01J29/46
摘要： An active electronically steered cathode (AESC) applies one or more electromagnetic modes to an input cavity, similar to that used in an inductive output tube. The structure and superposition of these modes creates local electric field maxima, causing the electron emission site or sites to move or be distributed across the surface of the cathode. Changing the amplitude, phase, or frequency of the modes provides time-variable control of the electric field profile, thereby generating electronically steered electron beams. One embodiment employs a pair of orthogonal TM modes driven out of phase, causing the electric field maximum to rotate around an annular cathode, producing a helical beam. Slots in the control grid may be used to segment the helical beam into discrete bunches to provide additional density modulation.
摘要翻译： 一个主动的电子控制阴极（AESC）将一个或多个电磁模式应用于输入腔，类似于感应输出管中使用的。 这些模式的结构和叠加产生局部电场最大值，导致电子发射位点或位点移动或分布在阴极表面。 改变模式的幅度，相位或频率提供对电场分布的时间变量控制，从而产生电子转向的电子束。 一个实施例采用一对相位驱动的正交TM模式，使电场最大值绕环形阴极旋转，产生螺旋波束。 可以使用控制网格中的槽来将螺旋束分割成离散的束以提供附加的密度调制。
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公开(公告)号：US07736210B2
公开(公告)日：2010-06-15
申请号：US11854416
申请日：2007-09-12
申请人： Robert H. Blick
发明人： Robert H. Blick
IPC分类号： H01J9/04
摘要： A microscale vacuum electronic device (10) provides for a mechanical modulation of cathode (12) position with respect to the anode position, the anode electrically biased with respect to the cathode and held in an evacuated housing with the cathode, allowing improved high-frequency modulation of an electron beam (24) useful for vacuum electronic devices such as klystrons, klystrodes, and high frequency triodes.
摘要翻译： 微型真空电子设备（10）提供相对于阳极位置的阴极（12）位置的机械调制，阳极相对于阴极电偏置并且与阴极保持在抽真空的壳体中，从而允许改进的高频 用于真空电子设备例如速调管，klystrodes和高频三极管的电子束（24）的调制。
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公开(公告)号：US06844860B2
公开(公告)日：2005-01-18
申请号：US10203493
申请日：2001-02-08
IPC分类号： H01J23/04 , H01J23/16 , H01J23/20 , H01J25/00 , H01J25/22 , H01J25/34 , H01J25/50 , H01Q13/10 , H01P11/00
CPC分类号： H01J25/00 , H01J23/04 , H01J23/165 , H01J23/20 , H01J25/22 , H01J25/34 , H01J25/50 , H01J2223/06 , Y10T29/49016 , Y10T29/49156 , Y10T29/49165
摘要： A transducer suitable for generating signals in the terahertz region has a resonant cavity (4) with apertures (6) aligned with cold cathode source (2) being a field emitter array. The resonant cavity (4) consists of an inner cylindrical region (8) and an outer toroid region (9) that includes a slot antenna (11). To achieve signal generation in the terahertz region, the cavity (4) is fabricated using an etched polymeric material.
摘要翻译： 适于在太赫兹区域中产生信号的换能器具有谐振腔（4），其中与冷阴极源（2）对准的孔（6）是场发射器阵列。 谐振腔（4）由包括缝隙天线（11）的内圆柱形区域（8）和外环形区域（9）组成。 为了在太赫兹区域中实现信号产生，使用蚀刻的聚合物材料制造空腔（4）。
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35.发明授权
公开(公告)号：US5327094A
公开(公告)日：1994-07-05
申请号：US989090
申请日：1992-12-11
摘要： A crossed-field amplifier is provided which has an anode and a cathode creating an electric field across a magnetic field formed in an interaction area. A field emitter is disposed within a slot formed on an outer surface of the cathode. The field emitter emits an electron current in response to the electric field to provide priming electrons for improving the start up time of the amplifier. The electron current produced by the field emitter has been shown to initiate secondary emissions of electrons from the cathode to reduce irregular start-up or "jitter" typically experienced with the amplifier at low pulse repetition frequencies. In an alternative embodiment of the invention, a thermionic emitting filament is disposed in a space between adjacent anode vanes of the amplifier. The filament emits electrons in response to an external power source. A portion of the emitted electrons tend to impact the anode vanes, creating x-rays which impact the cathode surface to initiate secondary emissions of electrons.
摘要翻译： 提供了一种交叉场放大器，其具有阳极和阴极，跨越在相互作用区域中形成的磁场产生电场。 场发射器设置在形成在阴极的外表面上的槽内。 场发射器响应于电场发射电子电流以提供引发电子以改善放大器的启动时间。 已经显示由场发射器产生的电子电流从阴极引发电子的二次发射，以减少通常在低脉冲重复频率下放大器遇到的不规则启动或“抖动”。 在本发明的替代实施例中，热离子发射灯丝设置在放大器的相邻阳极叶片之间的空间中。 灯丝响应于外部电源发射电子。 发射的电子的一部分倾向于撞击阳极叶片，产生影响阴极表面的X射线以引发电子的二次发射。
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公开(公告)号：US5132593A
公开(公告)日：1992-07-21
申请号：US773417
申请日：1991-10-09
申请人： Susumu Nishihara
发明人： Susumu Nishihara
摘要： A microwave electron gun for a linear accelerator uses microwave energy to impart an initial acceleration to electrons emitted from a lanthanum-hexaboride cathode. The microwave are contained in an electron-gun cavity, the upstream wall of which has a protruding part surrounding the entrance opening that accommodates the cathode, and the downstreams wall of which has a flat part surrounding an exit opening. The rest of the downstream wall has a radius of curvature equal to that of the other microwave cavities in the accelerating tube, and its center of curvature is aligned with theirs. The cathode is fused to a pair of carbon electrodes to form a cathode block, which is held by clamping between a pair of electrode bars, thus forming a cathode tube. The cathode tube is inserted into a sleeve upstream of the entrance opening in the electron-gun cavity, and is surrounded at a distance of one quarter-wavelength from the cathode by a disk-shaped choke cavity extending one quarter-wavelength from the cathode tube. This electron gun is easy to design and operate, and prevents loss of microwave energy.
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公开(公告)号：US5121031A
公开(公告)日：1992-06-09
申请号：US690569
申请日：1991-04-24
申请人： Susumu Nishihara
发明人： Susumu Nishihara
摘要： A microwave electron gun for a linear accelerator uses microwave energy to impart an initial acceleration to electrons emitted from a lanthanum-hexaboride cathode. The microwaves are contained in an electron-gun cavity, the upstream wall of which has a protruding part surrounding the entrance opening that accommodates the cathode, and the downstream wall of which has a flat part surrounding an exit opening. The rest of the downstream wall has a radius of curvature equal to that of the other microwave cavities in the accelerating tube, and its center of curvature is aligned with theirs. The cathode is fused to a pair of carbon electrodes to form a cathode block, which is held by clamping between a pair of electrode bars, thus forming a cathode tube. The cathode tube is inserted into a sleeve upstream of the entrance opening in the electron-gun cavity, and is surrounded at a distance of one quarter-wavelength from the cathode by a disk-shaped choke cavity extending one quarter-wavelength from the cathode tube. This electron gun is easy design and operate, and prevents loss of microwave energy.
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公开(公告)号：US4313072A
公开(公告)日：1982-01-26
申请号：US083484
申请日：1979-10-10
CPC分类号： H03B9/01 , H01J23/04 , H01J25/04 , H01J3/021 , H01J2201/342
摘要： The disclosure relates to a light modulated electron beam driven radiofrequency emitter. Pulses of light impinge on a photoemissive device which generates an electron beam having the pulse characteristics of the light. The electron beam is accelerated through a radiofrequency resonator which produces radiofrequency emission in accordance with the electron, hence, the light pulses.
摘要翻译： 本发明涉及一种光调制电子束驱动的射频发射器。 光的脉冲撞击产生具有光的脉冲特性的电子束的光发射装置。 电子束通过射频谐振器加速，该射频谐振器根据电子产生射频发射，因此产生光脉冲。
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公开(公告)号：US20240096583A1
公开(公告)日：2024-03-21
申请号：US18368940
申请日：2023-09-15
申请人： Elve Inc.
发明人： Colin Andrew McElroy , Michelle Gonzalez , Diana Gamzina Daugherty , Mikhail Kuffel , Danny Chan
摘要： A cathode heater assembly for use in a vacuum electronic device comprises a refractive cup having a bottom portion and side walls forming a container; a cathode secured in the container of the refractive cup; and a heater wire coupled to the refractive cup. The cathode heater assembly may be manufactured by providing a refractive cup having a bottom portion and side walls forming a container; inserting a cathode pellet in the container of the refractive cup; impregnating the cathode pellet with electron emissive materials while the cathode pellet is in the container of the refractive cup; and attaching a heater wire to the refractive cup.
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