公开(公告)号：US06420821B1

公开(公告)日：2002-07-16

申请号：US09489339

申请日：2000-01-21

Applicant: Kiyoshi Kishiki ,  Yukio Torikai ,  Toshihiko Yamashita ,  Hideyuki Obata

Inventor： Kiyoshi Kishiki ,  Yukio Torikai ,  Toshihiko Yamashita ,  Hideyuki Obata

IPC: H01J2305

CPC classification number: H01J23/05 ,  H01J2223/165

Abstract: A cathode for a magnetron having concave/convex portions on a surface of a cylindrical base metal with thermionic emitting materials being fixedly attached to concave portions from among the concave/convex portions. The convex portions of the concave/convex portions are arranged to be inclining. It is enabled to effectively protect thermionic emitting materials from inverse impulse of electrons or ions and from oscillation to thereby restrain consumption and omission of these thermionic emitting materials and to decrease higher harmonics of radiation.

Abstract translation: 一种用于磁控管的阴极，其具有在圆柱形基体金属表面上的凹/凸部分，其中热电子发射材料固定地附接到凹凸部分的凹部。 凹凸部的凸部配置成倾斜。 能够有效地保护热电子发射材料免受电子或离子的反冲和振荡，从而抑制这些热离子发射材料的消耗和省略，并降低辐射的高次谐波。

公开(公告)号：US06388379B1

公开(公告)日：2002-05-14

申请号：US09380248

申请日：1999-08-30

Applicant: Vladimir Makhov

Inventor： Vladimir Makhov

IPC: H01J2550

CPC classification number: H01J23/05 ,  H01J2225/52

Abstract: The present invention relates to magnetrons and is aimed to improve effectiveness of using a working surface of field-electron emitters, to improve reliability of devices under conditions of increased mechanical action. These objects are solved in the design of a magnetron, comprising an anode and a cathode disposed co-axially inside the anode, the cathode comprising a secondary-electron emitter; a field-electron emitter and lateral flanges functioning as focusing shields, wherein at least one of the focusing shields is located from the secondary-electron emitter and comprises at least one field-electron emitter with a working end-face thereof facing the surface of the secondary-electron emitter.

Abstract translation: 本发明涉及磁控管，其目的在于提高使用场致电子发射器的工作表面的有效性，以提高机械作用条件下的装置的可靠性。 在磁控管的设计中解决了这些目的，其包括在阳极内同轴设置的阳极和阴极，阴极包括二次电子发射体; 场电子发射器和用作聚焦屏蔽的侧向凸缘，其中聚焦屏蔽中的至少一个位于二次电子发射器处，并且包括至少一个场电子发射器，其工作端面面向 二次电子发射体。

公开(公告)号：US06329753B1

公开(公告)日：2001-12-11

申请号：US09380247

申请日：1999-08-30

Applicant: Vladimir Makhov

Inventor： Vladimir Makhov

IPC: H01J2542

CPC classification number: H01J23/05 ,  H01J25/50

Abstract: The present invention relates to M-type microwave devices and is aimed to improve effectiveness of using a working surface of field-electron emitters, to improve their reliability while increasing stability of field emission and service life of the device. These objects are solved in the design of a M-type microwave device, comprising an anode encircling a cylindrical evacuated cavity and a cathode assembly disposed co-axially inside the anode, said cathode assembly comprising a cylindrical rod with its surfaces having elements in the form of planar (film) field-electron emitters and secondary-electron emitters that provide a primary and a secondary electron emission, respectively. In doing so, the normal to planar field-electron emitters is not parallel and makes therewith an angle of more than 0 degrees. An end-face of the field-electron emitter is protected by a tunnel-thin dielectric layer containing impurities of various materials and materials having a low work function.

Abstract translation: 本发明涉及M型微波器件，旨在提高使用场致电子发射器工作表面的有效性，提高其可靠性，同时提高器件的场发射稳定性和使用寿命。 这些目的在M型微波设备的设计中得到解决，该微型设备包括一个环绕圆柱形抽空腔的阳极和同轴地设置在阳极内部的阴极组件，所述阴极组件包括圆柱形杆，其表面具有形式的元件 分别提供初级和次级电子发射的平面（膜）场 - 电子发射体和二次电子发射体。 在这样做时，平面场电子发射器的法线不平行并且使其具有大于0度的角度。 场电子发射体的端面由具有低功函数的各种材料和材料的杂质的隧道 - 薄介电层保护。

公开(公告)号：US4810925A

公开(公告)日：1989-03-07

申请号：US47106

申请日：1987-05-08

Applicant: David B. Fox

Inventor： David B. Fox

IPC: H01J1/15 ,  H01J23/04 ,  H01J23/05 ,  H01J1/13

CPC classification number: H01J23/05

Abstract: A directly heated cathode comprises a metal tube having a filling of powdered metal which extends beyond the tube and in which is embedded an electrical wire which is coaxial and extensive with said the outer tube over part of its length. The electrical wire is coated with insulating material which is normally alumina. The tube, the metal powder filling and the wire are sintered together, giving a relatively robust structure.

Abstract translation: 直接加热的阴极包括金属管，其具有延伸超过管的粉末金属的填充物，并且其中嵌入有与所述外管在其一部分长度上同轴且广泛的电线。 电线涂有绝缘材料，绝缘材料通常是氧化铝。 管，金属粉末填充物和线被烧结在一起，给出相对坚固的结构。

公开(公告)号：US4709129A

公开(公告)日：1987-11-24

申请号：US945166

申请日：1986-12-22

Applicant: John M. Osepchuk

Inventor： John M. Osepchuk

IPC: H01J23/05 ,  H01J25/50 ,  H05B6/64

CPC classification number: H01J25/50 ,  H01J23/05 ,  H05B6/64

Abstract: A microwave power source for a microwave oven in which a microwave magnetron is supplied simultaneously with filament heater power and with anode voltage through an inductive reactance power supply and has end shields with peripheral depressions to suppress end shield secondary emission oscillations during warm-up of the filament which can rapidly collapse to produce rapid shutoff of anode current and, consequently, undesirably high voltage spikes across the magnetron.

Abstract translation: 一种用于微波炉的微波电源，其中微波磁控管与灯丝加热器电源同时供应并且具有通过感抗电源的阳极电压，并且具有外围凹陷的端部屏蔽以在预热期间抑制端屏蔽二次发射振荡 灯丝可以快速塌陷以产生阳极电流的快速关闭，并因此导致横跨磁控管的不期望的高电压尖峰。

公开(公告)号：US4489254A

公开(公告)日：1984-12-18

申请号：US385399

申请日：1982-05-19

Applicant: Tokuju Koinuma ,  Norio Tashiro ,  Kaizo Yamamoto

Inventor： Tokuju Koinuma ,  Norio Tashiro ,  Kaizo Yamamoto

IPC: H01J23/02 ,  H01J23/05 ,  H01J25/50

CPC classification number: H01J23/05 ,  H01J23/02

Abstract: Disclosed is a magnetron for a microwave oven which has a drain electrode (60) near a cathode (25) and in a position where an electron beam path is not interfered with. The cathode and the drain electrode are formed in spiral shapes. Turns of the cathode are alternately arranged with those of the drain electrode. When the magnetron is operated, the drain electrode is kept at the same potential as the cathode or is kept at a negative potential relative to that of the cathode. Therefore, positive ions in the vicinity of the cathode are collected at the drain electrode, thus decreasing high frequency noise.

Abstract translation: PCT No.PCT / JP81 / 00250 Sec。 371日期1982年5月19日 102（e）日期1982年5月19日PCT提交1981年9月22日PCT公布。 公开号WO82 / 01101 日期为1982年4月1日。公开是用于微波炉的磁控管，其具有靠近阴极（25）的漏电极（60）并且电子束路径不受干扰的位置。 阴极和漏电极形成为螺旋状。 阴极的匝与漏电极的交替排列。 当磁控管工作时，漏电极保持与阴极相同的电位，或者相对于阴极保持在负电位。 因此，阴极附近的正离子被收集在漏电极处，从而降低高频噪声。

公开(公告)号：US4480235A

公开(公告)日：1984-10-30

申请号：US459013

申请日：1983-01-18

Applicant: William A. Gerard

Inventor： William A. Gerard

IPC: H01J23/05 ,  H01J25/50 ,  H03B9/10

CPC classification number: H01J23/05

Abstract: The cathode of a coaxial magnetron has a cylindrical electron emitter with a radially extending projection which is asymmetrical with respect to the axis of the emitter. The projection suppresses starting of the magnetron in the TE.sub.121 mode and reduces starting jitter. In a preferred embodiment, the projection is in the form of a circumferential ridge extending around approximately one-half the circumference of the cylindrical surface and is centrally located thereon. The projection is oriented at 45 degrees with respect to the output of the magnetron. The power output of the magnetron is not substantially reduced.

Abstract translation: 同轴磁控管的阴极具有圆柱形的电子发射器，其具有相对于发射极的轴线不对称的径向延伸突起。 该投影可抑制TE121模式下磁控管的启动，并减少启动抖动。 在一个优选实施例中，突出部是围绕圆柱形表面的大约一半圆周延伸并且位于其上的周向脊的形式。 投影相对于磁控管的输出定向成45度。 磁控管的功率输出基本上不减少。

公开(公告)号：US4263528A

公开(公告)日：1981-04-21

申请号：US902529

申请日：1978-05-03

Applicant: George Miram

Inventor： George Miram

IPC: H01J1/20 ,  H01J1/28 ,  H01J1/46 ,  H01J23/05 ,  H01J21/10

CPC classification number: H01J1/46 ,  H01J23/05

Abstract: In an electron gun having a control grid in contact with the face of the cathode, unwanted thermionic emission from the cathode can be effectively suppressed by applying a thin (1 micron) coating of boron nitride to the surface of the control grid. The boron nitride has low thermionic emission itself and, in addition, has an unusual ability to shed or eliminate any deposits of emissive material such as barium or its oxides which come in contact with the boron nitride layer. For optimum performance and longest lifetime, the boron nitride layer is applied over a pyrolytic graphite layer which may be the conductive grid itself.

Abstract translation: 在具有与阴极表面接触的控制栅格的电子枪中，通过向控制栅格的表面施加薄（1微米）的氮化硼涂层，能够有效地抑制来自阴极的不希望的热离子发射。 氮化硼本身具有低的热电子发射，并且另外具有脱落或消除与氮化硼层接触的发射材料如钡或其氧化物的任何沉积物的异常能力。 为了获得最佳性能和最长寿命，将氮化硼层施加在可能是导电栅格本身的热解石墨层上。

公开(公告)号：US3896332A

公开(公告)日：1975-07-22

申请号：US47424074

申请日：1974-05-29

Applicant: M O VALVE CO LTD

Inventor： HEATHCOTE VINCENT ALBERT

IPC: H01J23/05 ,  H01J25/50

CPC classification number: H01J23/05

Abstract: A quick start magnetron comprising: an anode; a main cathode positioned adjacent the anode and providing by secondary electron emission due to electron back bombardment at least a major part of the electron current required for operation of the magnetron; and an electron gun employing a thermionic cathode of low thermal inertia arranged to direct a stream of electrons into the space between the anode and the main cathode to initiate operation of the magnetron.

公开(公告)号：US3458754A

公开(公告)日：1969-07-29

申请号：US3458754D

申请日：1966-05-03

Applicant: GEN ELECTRIC

Inventor： PETERS PHILIP H JR

IPC: H01J23/05 ,  H01J25/55 ,  H01J25/34 ,  H01J25/50

CPC classification number: H01J25/55 ,  H01J23/05