公开(公告)号：US3812395A

公开(公告)日：1974-05-21

申请号：US33383473

申请日：1973-02-20

申请人： VARIAN ASSOCIATES

发明人： SCOTT A

IPC分类号： H01J23/24 ,  H01J25/38 ,  H01J25/34

CPC分类号： H01J25/38

摘要： A traveling wave tube is capable of operating over relatively wide bandwidths and with relatively high efficiency at one or the other of two different power output levels which are separated by as much as 10 db. The tube is switchable from one mode of operation to the other in a relatively short period of time, as of a few nanoseconds, by means of a control grid. In switching from the low power C.W. mode to the high power pulsed mode, the beam current is increased by a value of several times, as of five; the effective length of the output section of the slow wave circuit is automatically decreased; and the phase velocity on the output section of the slow wave circuit is decreased to maintain synchronism with the slow space charge wave of the beam.

公开(公告)号：US3787747A

公开(公告)日：1974-01-22

申请号：US3787747D

申请日：1972-08-07

申请人： VARIAN ASSOCIATES

发明人： SCOTT A

IPC分类号： H01J21/18 ,  H01J23/087 ,  H01J25/34

CPC分类号： H01J21/18 ,  H01J23/0873

摘要： The periodic magnet structure for a periodically focused beam tube is formed by a single pair of homogeneous slabs of magnetizable material that are permanently magnetized with a pattern of magnetic poles of alternating polarity taken along the direction of the beam path. In a sheet beam tube of preferred geometry, a pair of ceramic slabs are disposed to straddle the sheet beam and the internal planar faces of the ceramic slabs have circuits printed thereon for: electrical connections to all elements, beam forming electrodes, microwave interaction structure, edge focusing electrodes, and the beam collector electrode structure. The permanently magnetized slabs are disposed external to the vacuum envelope, straddling the printed circuit ceramic slabs, for focusing the beam.

摘要翻译： 用于周期性聚焦的光束管的周期性磁体结构由一对可磁化材料的均匀平板形成，其永久地磁化，沿着光束路径的方向具有交替极性的磁极的图案。 在优选几何形状的片材束管中，一对陶瓷板被设置成跨越片材梁，并且陶瓷板的内部平坦面具有印刷在其上的电路，用于：与所有元件的电连接，波束形成电极，微波相互作用结构， 边缘聚焦电极和束集电极结构。 永久磁化的板坯设置在真空外壳的外部，跨过印刷电路陶瓷板，用于聚焦光束。

公开(公告)号：US3755706A

公开(公告)日：1973-08-28

申请号：US3755706D

申请日：1972-03-20

申请人： VARIAN ASSOCIATES

发明人： SCOTT A

IPC分类号： H01J23/087 ,  H01J25/34

CPC分类号： H01J23/0873

摘要： A microwave beam tube operating above 4GHz is miniaturized by designing the electron gun to produce an electron beam having a microperveance within the range of 0.8 to 2.2. A periodic permanent magnet beam focusing structure is provided which employs ring-shaped permanent magnets having a coercive force in excess of 2,000 gauss, whereby the length, size, and weight of the tube, for a given gain and output power, are reduced substantially.

摘要翻译： 通过设计电子枪以产生具有在0.8至2.2范围内的微透镜的电子束，工作在4GHz以上的微波束管被小型化。 提供了一种周期性的永磁体聚焦结构，其采用具有超过2,000高斯的矫顽力的环形永磁体，由此对于给定的增益和输出功率，管的长度，尺寸和重量被显着减小。

公开(公告)号：US3809949A

公开(公告)日：1974-05-07

申请号：US33384473

申请日：1973-02-20

申请人： VARIAN ASSOCIATES

发明人： SCOTT A

IPC分类号： H01J23/24 ,  H01J25/34

CPC分类号： H01J23/24

摘要： The RF conversion efficiency of a vane loaded helix derived slow wave circuit, such as a ring and bar, meander line, double meander line, helix, cross wound helix, double ring and bar or a ladder line circuit, is increased while maintaining broad band operation; in a first embodiment, by increasing the degree of penetration of the vanes into the slow wave circuit at the output end of the tube for introducing a frequency dependent velocity taper and, in a second embodiment, by electrically isolating the aforementioned loading vanes for d.c. potential at the output end of the tube and applying a higher beam voltage to these circuit loading vanes.

摘要翻译： 叶片负载螺旋衍生的慢波电路的RF转换效率，如环和条，曲折线，双曲折线，螺旋线，交叉螺旋线，双环和条或梯形线电路，同时保持宽带 操作; 在第一实施例中，通过增加在用于引入频率相关速度锥度的管的输出端处的叶片进入慢波回路的程度，并且在第二实施例中，通过将上述加载叶片电隔离以用于直流。 在管的输出端处施加电压并向这些电路加载叶片施加更高的电压。