公开(公告)号：US5477107A

公开(公告)日：1995-12-19

申请号：US171292

申请日：1993-12-21

申请人： Ivo Tammaru ,  Christine G. Thoma ,  Roger S. Hollister ,  Robert G. Ripley

发明人： Ivo Tammaru ,  Christine G. Thoma ,  Roger S. Hollister ,  Robert G. Ripley

IPC分类号： H01J23/20 ,  H01J23/16 ,  H01J23/30 ,  H01P7/06 ,  H01J23/54 ,  H01J25/34

CPC分类号： H01J23/16 ,  H01J23/30

摘要： Lossy slabs are provided in linear-beam tubes such as coupled-cavity TWTs and klystrons to produce a more level tube response over its full operating band, and to eliminate oscillations at the upper cut-off frequency in the TWTs. The slab thicknesses are selected to produce a substantially non-resonant field of about one-quarter wavelength within the slab when the tube is operated within its passband. The slabs are formed from a dielectric material with a conductive mixture of at least about 15%.

摘要翻译： 在诸如耦合腔TWT和速调管之类的线性束管中提供有损的平板，以在其全部工作频带上产生更高级的管响应，并且消除TWT中上限截止频率处的振荡。 当管在其通带内操作时，选择板坯厚度以在板坯内产生约四分之一波长的基本非谐振场。 板状物由具有至少约15％的导电混合物的电介质材料形成。

公开(公告)号：US6060832A

公开(公告)日：2000-05-09

申请号：US924201

申请日：1997-07-24

申请人： E. Allen Adler ,  Ivo Tammaru ,  Robert G. Ripley

发明人： E. Allen Adler ,  Ivo Tammaru ,  Robert G. Ripley

IPC分类号： H01J23/027 ,  H01J23/02

CPC分类号： H01J23/0275

摘要： A self-biasing element is formed by coupling an electron accumulator to a collector stage of a linear-beam microwave tube with a base which has a selected resistance. The electron accumulator has a secondary emission coefficient less than one and is positioned to intercept a portion of the electrons in the electron beam of the linear-beam microwave tube. The electron accumulator thus acquires a negative voltage whose magnitude is controlled by selecting the base resistance and the radial and axial position of the self-biasing element within the collector. Various arrangements of self-biasing elements and collector stages are disclosed which improve the efficiency and RF performance of the microwave tube.

摘要翻译： 通过将电子存储器与具有选定电阻的基极的线性束微波管的集电极级耦合而形成自偏压元件。 电子蓄电器具有小于1的二次发射系数，并且被定位成截取线性束微波管的电子束中的一部分电子。 因此，电子蓄电器通过选择基极电阻和收集器内的自偏压元件的径向和轴向位置而获得其电压的大小。 公开了自偏压元件和收集器级的各种布置，其提高了微波管的效率和RF性能。

公开(公告)号：US5130206A

公开(公告)日：1992-07-14

申请号：US736844

申请日：1991-07-29

申请人： Sunder S. Rajan ,  Ivo Tammaru ,  Steve L. Bosma ,  John W. Eldridge

发明人： Sunder S. Rajan ,  Ivo Tammaru ,  Steve L. Bosma ,  John W. Eldridge

IPC分类号： C23C24/08 ,  H01J23/20 ,  H01J23/30

CPC分类号： H01J23/20 ,  C23C24/08 ,  H01J23/30 ,  Y10T428/12056 ,  Y10T428/12063

摘要： Extra loss is introduced in coupled cavity and klystron RF circuits by applying a surface coating to selected parts of circuit elements used in the circuits. The coating is applied in the form of a slurry, which is then sintered. The slurry comprises a mixture of an iron-base powder (such as a stainless steel) and a dielectric glass ceramic, suspended in a binder dissolved in a solvent. Circuits with the loss coating are easier to match than by other prior art techniques. The loss coating of the invention reduces the fabrication cost of coupled-cavity traveling wave tubes, while improving the performance by minimizing the gain ripple. Higher average power operation is possible, due to elimination of loss buttons previously employed in the prior art.

公开(公告)号：US06049249A

公开(公告)日：2000-04-11

申请号：US925930

申请日：1997-09-08

申请人： Ivo Tammaru ,  James W. Hansen

发明人： Ivo Tammaru ,  James W. Hansen

IPC分类号： H01J23/15 ,  H01J25/38 ,  H03F3/58 ,  H01J25/34

CPC分类号： H01J23/15 ,  H01J25/38 ,  H03F3/58

摘要： Apparatus compensating for gain variations versus frequency of a traveling wave tube (TWT) is disclosed. The apparatus provides an RF interaction circuit section designed with specified mismatches causing internal reflections of the RF waves, such that the overall gain response is flattened out or inverted.

摘要翻译： 公开了补偿行波管（TWT）的增益变化与频率的装置。 该装置提供设计成具有引起RF波的内部反射的指定失配的RF相互作用电路部分，使得整体增益响应被平坦化或反转。

公开(公告)号：US5162747A

公开(公告)日：1992-11-10

申请号：US657570

申请日：1991-02-19

申请人： Ivo Tammaru

发明人： Ivo Tammaru

IPC分类号： H01J25/10 ,  H01J25/34 ,  H01J25/61

CPC分类号： H01J25/61 ,  H01J25/10 ,  H01J25/34

摘要： Two or more signal interaction structures (16,18), which may be klystron or traveling wave structures (32,50), are axially disposed in series between an electron gun (12) and a collector (14) for selectively velocity modulating an electron beam (20) generated by the gun (12) with a microwave input signal (IN1,IN2) and extracting a resulting amplified microwave output signal (OUT1,OUT2) from the beam (20). The interaction structures (16,18) are designed to operate in different frequency bands, for example the X and Ku bands, with only one of the structures (16,18) having an input signal (IN1,IN2) applied thereto at any given time. The interaction structures (16,18) are further designed such that the structures (16,18) which are not being used do not affect the structure (16,18) which is being used.

公开(公告)号：US5162697A

公开(公告)日：1992-11-10

申请号：US563582

申请日：1990-08-06

申请人： Jon A. Davis ,  Ivo Tammaru

发明人： Jon A. Davis ,  Ivo Tammaru

IPC分类号： H01J23/24 ,  H01J25/38

CPC分类号： H01J23/24 ,  H01J25/38

摘要： A traveling wave tube (10) includes a coupled cavity type slow wave structure (100) having a driver stage (52) and an output section (101) with a primary section (64) and a velocity taper section (82) which in combinattion produce maximum signal gain at a predetermined frequency. A gain flattening section (104) is preferably disposed between the driver stage (52) and the primary section (64) of the output section (101), and is designed to operate at a reduced phase velocity selected to produce minimum or negative signal gain at approximately the predetermined frequency. The gain characteristics of the driver stage (52), gain flattening section (104), primary section (64), and velocity taper section (82) combine to produce minimum signal gain variation over an operating frequency range which spans the predetermined frequency, and expand the bandwidth of the traveling wave tube (10).

公开(公告)号：US4445071A

公开(公告)日：1984-04-24

申请号：US372520

申请日：1982-04-28

申请人： Tore Wessel-Berg ,  Ivo Tammaru

发明人： Tore Wessel-Berg ,  Ivo Tammaru

IPC分类号： H01J25/78 ,  H01J25/00

CPC分类号： H01J25/78

摘要： A gyrocon deflection system can provide circular beam deflection using a single RF coupler, without providing a phase difference between the two beam deflection signals to account for electron beam transit time between the two sets of deflection plates. The two sets of deflection plates are internally connected pairwise together so that both deflection regions are in RF phase, and the midplanes of the two sets are spaced 90.degree. apart electrically at the desired operating voltage and frequency.

摘要翻译： 陀螺仪偏转系统可以使用单个RF耦合器提供圆形光束偏转，而不在两个光束偏转信号之间提供相位差，以解决两组偏转板之间的电子束传播时间。 两组偏转板成对地内部连接在一起，使得两个偏转区域处于RF相位，并且两组的中间板在期望的工作电压和频率下电隔开90°。