Compact oscillator based on cold cathode

Abstract

The invention relates to a compact oscillator based on a cold cathode. The compact oscillator based on a cold cathode includes a high frequency interaction system, a cold cathode electron gun which isin sealed connection with one end of the high frequency interaction system, a collection electrode which is in sealed connection with the other end of the high frequency interaction system, and a signal output module which is arranged on the high frequency interaction system and is in sealed connection with the high frequency interaction system, wherein the high frequency interaction system includes a tubular housing and a periodic slow wave structure on the inner wall of the tubular housing; the cold cathode electron gun includes a cold cathode emitter, and the cold cathode emitter is arranged in a cavity which is formed by the high frequency interaction system and the cold cathode electron gun; by directly integrating the cold cathode with the inside of the high frequency interaction system, the compact oscillator enables the high frequency field to directly act on the surface of the cathode to obtain a modulation electron beam; the modulation electron beam can improve the beam-waveinteraction efficiency and gain so as to reduce the period number of the periodic slow wave system so as to reduce the size of the high frequency interaction system; and generation of the modulationelectron beam can also reduce the oscillation-starting time.

Description

technical field [0001] The invention relates to the technical field of microwave, millimeter wave, submillimeter wave and terahertz frequency band electric vacuum devices, in particular to a compact oscillator based on cold cathode in microwave electric vacuum devices. Background technique [0002] Microwave, millimeter wave, and submillimeter wave electric vacuum radiation source devices have been widely valued as indispensable core devices for military electronic systems such as radar, electronic countermeasures, and space communications. Electron guns in traditional electric vacuum radiation source devices generally use a thermal emission cathode system. After decades of development, the thermal emission cathode process has become very mature and has been widely used in various electric vacuum radiation source devices. However, the thermal emission cathode has the following significant Disadvantages: complex structure and high cost. The cathode system is composed of vario...

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Problems solved by technology

Electron guns in traditional electric vacuum radiation source devices generally use a thermal emission cathode system. After decades of development, the thermal emission cathode process has become very mature and has been widely used in various electric vacuum radiation source devices. However, the thermal emission cathode has the following significant Disadvantages: complex structure and high cost. The cathode system is composed of various metal and ceramic components. Since the hot cathode works in a high temperature environment of thousands of degrees, the heating filament in the cathode is easy to break or short circuit, resulting in damage to the device; on the other hand, Due to the need for heating power, the complexity of the system is increased, the efficiency of the system is reduced, and it takes a long time to reach the working temperature, especially for high-power devices, the startup time is often as long as several minutes, which brings great inconvenience to use; at the same time , due to the complex structure of the hot cathode is also one of the main reasons why it is difficult to integrate electric vacuum radiation source devices

[0003] Compared with the hot cathode electric vacuum radiation source, the solid-state semiconductor radiation source device has the advantages of small size, integration, and fast response speed, but it has the disadvantages of weak anti-interference, radiation resistance, and low power, especially in the space environment. The reliability of solid-state radiation source devices is difficult to guarantee

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