A high-frequency structure of terahertz power source based on array grating structure

Abstract

The invention discloses a terahertz power source high-frequency structure based on an array grating structure and belongs to the field of terahertz vacuum electron devices. The high-frequency structure is composed of a quasi-optical resonator, array metal gratings, a rectangular groove and a round coupling hole, wherein the upper reflector and the lower reflector of the quasi-optical resonator are a spherical mirror and a cylindrical mirror respectively, the rectangular groove is formed in the cylindrical mirror, the round coupling hole is formed in the spherical groove, and the metal material used by the whole system is oxygen-free copper. The two ends of each array metal grating are embedded into the rectangular groove in the cylindrical mirror and arranged in a cyclical mode both in the x direction and in the z direction, and beam-wave energy exchange is conducted by means of cylindrical electron beams. The method is used for generating terahertz electromagnetic wave signals, beam-wave interaction is conducted by means of the cylindrical electron beams, electronic efficiency is high, output power is high, focusing magnetic field intensity can be effectively reduced, and cathode emission current density of devices can be effectively reduced.

Description

[0001] Field [0002] The invention belongs to the field of terahertz vacuum electronic devices, in particular to a high-frequency structure of a terahertz power source based on an array grating structure. Background technique [0003] Due to the unique properties of THz waves and their great scientific value and broad application prospects in object imaging, environmental monitoring, medical diagnosis, radio astronomy, especially in satellite communications, military radar, national defense security inspection, etc. attention. However, until now, the development and application of terahertz technology is still very limited, and its main obstacle is that its transmitting and receiving devices are still very bulky and expensive. [0004] According to the mechanism of THz radiation, its radiation sources can be divided into two categories: one is the method of using electronics, and the other is the method of using optics. However, most of them are either complex, bulky, ineff...

AI Technical Summary

Problems solved by technology

The Oro tube is a surrounding radiation device that is excited by a sheet-like electron beam in an open resonant cavity to generate an electromagnetic field. It can be used as a small and compact terahertz radiation source, but its efficiency is low, and the large starting current draws At the same time, due to the high current density of the sheet electron beam, the requirements for the focusing magnetic field are also very high

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