Dual-electron injection terahertz folded travelling-backward wave amplifier

Abstract

The invention discloses a dual-electron injection terahertz folded travelling-backward wave amplifier, and is applied to the technical field of vacuum electron. A mutual effect of two beams of round electron injection with different speeds and the same-frequency electromagnetic wave is employed, working voltages of the two beams of electron injection are respectively synchronized with a forward space harmonic and a reverse space harmonic, an electromagnetic wave signal of which a travelling wave is amplified is propagated forwards, then acts on an oscillation loop of a backward wave and is used as an input signal of the backward wave so as to form a folding loop, an amplified travelling wave signal in a feedback loop acts in the travelling wave to promote amplification of the travelling wave, thus, the electromagnetic wave in a slow wave circuit can participate in amplification of the travelling wave and is simultaneously participate in amplification of the backward wave to form a nature feedback passage, and the energy of the device can be continuously increased unit the beam-wave interaction power is saturated.

Description

technical field [0001] The invention belongs to the technical field of vacuum electronics, in particular to an amplifier technology. Background technique [0002] Terahertz waves refer to electromagnetic waves with a frequency of 0.1THz-10THz, which are between millimeter waves and infrared light waves. They have the characteristics of strong penetrating ability, low photon energy, broadband, and strong transmission. With the development and utilization of terahertz spectrum resources, terahertz technology has important application value and strategic value in the fields of drug analysis and testing, biomedicine, and national security. Countries around the world have also invested great enthusiasm in the field of terahertz research. [0003] At present, the main generation methods of terahertz sources are mainly semiconductor radiation sources based on solid-state devices, conductor radiation sources based on photonics, and terahertz radiation sources based on vacuum electro...

AI Technical Summary

Problems solved by technology

When expanding to the terahertz frequency band, as the frequency increases, the size of the slow-wave structure shrinks. Due to the co-transition effect of the size, it is difficult to achieve high-precision processing and assembly, and the current is too small due to the reduction of the electron injection channel. The focusing system is difficult to focus, the coupling impedance is low, and the circuit loss is large. At the same time, traditional traveling wave devices or returning wave devices need to maintain a sufficient interaction length to achieve power amplification, which greatly increases the difficulty of electron beam focusing and device processing.

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