Multi-pole multi-electron injection radiation source based on cold cathode

Abstract

The invention belongs to the field of microwave, millimeter wave and terahertz frequency band electric vacuum devices, and particularly provides a multi-pole multi-electron injection radiation sourcebased on a cold cathode. The device mainly comprises a cathode baffle, a radiation source core, a feed system, a metal shell and an output window sheet; the relatively high high-frequency field at themiddle part of a high-frequency structure is fully utilized to act on the surface of the cold cathode through a multi-stage emission and multi-pole modulation mode, so that the emission current is increased and the electron injection modulation depth is deepened, so that the electronic injection has a remarkable pre-modulation effect. According to the method, a very high-quality field emission pre-modulation electron injection can be obtained, the wave-injecting interaction efficiency is obviously improved, and the output power is obviously improved; the complexity of the device is greatly reduced without an optical-optical system, and fine processing is carried out, the size of the device can reach the micron order, and the integration and miniaturization of millimeter wave, sub-millimeter wave and terahertz radiation sources are realized.

Description

technical field [0001] The invention belongs to the field of microwave, millimeter wave and terahertz frequency band electric vacuum devices, in particular to a cold cathode-based vertical multi-pole multi-electron injection radiation source. Background technique [0002] Vacuum electron radiation sources are widely used in radar, communication and particle acceleration systems because of their high power and high frequency. The electron gun in the traditional electric vacuum radiation source device generally adopts the thermal emission cathode system. After decades of development, the thermal emission cathode process has been very mature; however, due to the high operating voltage and high operating temperature of the thermal cathode, the device is easy to The damage and long start-up time limit their application to vacuum electron radiation sources. The rapid development of solid-state radiation source devices has challenged vacuum devices in many fields. Their small size...

AI Technical Summary

Problems solved by technology

[0004] With the development of microwave electric vacuum devices towards the terahertz frequency band, the size of the devices must become smaller and smaller due to the higher frequency and smaller wavelength; on the one hand, it will bring difficulties in manufacturing and assembly, on the other hand, it will also make electronic The space and time for the interaction between the beam and the high-frequency field are getting smaller and smaller, which makes the speed and density modulation of the electron beam insufficient, and the output power of the device is limited.

In order to develop an integrated vacuum microelectronic radiation source, the influence of beam-wave interaction has become a key technical difficulty. Vacuum microelectronic devices are usually small in size and the electron beam speed is relatively fast. The limited interaction time makes the modulation of electron beam from high The energy absorbed by the frequency field is limited

Images