High efficient cathode assembly

A cathode component and cathode technology, which is applied to the cathode of the time-of-flight electronic tube, etc., can solve the problems of high heating power and high working temperature

Inactive Publication Date: 2007-05-02
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high working temperature of the film-coated cathode, the heating power is large. For the space traveling wave tube, due to the limitation of the power supply, very high requirements are placed on the cathode efficiency.

Method used

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Embodiment Construction

[0010] The structure of the cathode assembly is shown in Figure 1, which is basically a conventional structure, consisting of a cathode, a cathode cylinder 3, a cathode support cylinder 4, a cathode heat shield 5, a baffle 6, and a heater 8. The cathode includes a cathode surface 1 and a cathode base 2. Alumina 7 is filled between the cathode cylinder 3 and the heater 8, and a cylindrical cathode heat shield 5 is arranged around the cathode support cylinder 4, so that the cathode support cylinder 4 and the cathode heat shield 5 constitute a two-layer heat shield structure.

[0011] The heater 8 adopts a heater subassembly structure, and the heater subassembly is to bury the heating body (usually W wire or W-Re wire) in an insulating medium (usually Al 2 O 3 ), in this way, on the one hand, the short circuit of the heaters caused by vibration and the like is avoided, and the reliability of the heaters 8 is improved. The temperature difference between the heater 8 and the catho...

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Abstract

A cathode component with high efficiency utilizes metal Ti with extremely low heat conductivity as support barrel of cathode so that power consumption of heat conduction can be lowered in order to raise heat efficiency of cathode.

Description

technical field [0001] The high-efficiency cathode assembly of the invention relates to the technical field of microwave devices, and is a cathode assembly with high thermal efficiency. Background technique [0002] The space traveling wave tube is a key component of the spaceborne transponder and the spaceborne synthetic aperture radar transmitter. It mainly plays the role of the final stage amplification of microwave power. It has the characteristics of frequency bandwidth, high gain, high efficiency and high power. With the wide application of traveling wave tubes in satellite communications and other fields, the requirements for traveling wave tubes are getting higher and higher. For example, pulse traveling wave tubes are developing towards high power, large working ratio, long life and high reliability. Therefore, the cathode, which is the heart of the traveling wave tube, also needs to be further improved, requiring higher current density, lower cathode operating temp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J23/04
Inventor 刘燕文刘胜英田宏张明晨徐振英孟明凤
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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