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Internal-feedback-type terahertz traveling wave tube oscillator

A traveling wave tube, terahertz technology, applied in the field of terahertz electromagnetic wave source, to achieve the effect of easy mass production, small size and high power

Inactive Publication Date: 2013-04-03
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Of course, there is no report on the physical results of 560GHz, but more detailed simulation studies have been carried out, and Ka-band experimental studies have been carried out

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  • Internal-feedback-type terahertz traveling wave tube oscillator

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Embodiment Construction

[0043] An internal feedback type terahertz traveling wave tube oscillator of the present invention, from figure 1 It can be seen that the difference from ordinary traveling wave tubes is:

[0044] (1) A tuning device is added at its input port, which can be a variable short circuit;

[0045] (2) Design the output port in a special way so that it has a certain reflection in the working frequency band, and its reflection coefficient is about 0.2.

[0046] The working principle of the traveling wave tube oscillator of the present invention can be figure 1The schematic diagram is shown to illustrate the principle. The working principle of the traveling wave tube oscillator is described as follows: the white noise in the electron beam excites a white noise electromagnetic wave in the slow wave structure, which is amplified by the interaction between the electron beam and the slow wave structure. Most of the amplified electromagnetic wave is output from the output port and provid...

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Abstract

The invention discloses an internal-feedback-type terahertz traveling wave tube oscillator, and relates to a terahertz electromagnetic wave source technique. Based on a traveling wave tube, a feedback mechanism is introduced so as to form an oscillator. Compared with the existing traveling wave tube, the structure is characterized in that 1. a tuning device is added at an input port of the oscillator, and is a variable short circuit device; and 2. an output port is designed with a special method, so that the oscillator has certain reflection in a working frequency band, and the reflection coefficient is about 0.2. According to the oscillator provided by the invention, a feedback loop of an electromagnetic wave is introduced into the structure, the phase shift of the electromagnetic wave through the feedback loop is integral multiples of 2*pi, and under the condition that a slow wave structure provides sufficient gain, the device is oscillated, and one or a plurality of electromagnetic waves with specific frequency is / are output. Because the tuning device can introduce phase shift variations through methods of mechanical tuning and the like in the feedback loop, the frequency of a start oscillation electromagnetic wave also varies to meet the condition that the total phase shift of the feedback loop is integral multiples of 2*pi, so that the tunable characteristic is realized.

Description

technical field [0001] The invention relates to the technical field of terahertz electromagnetic wave sources, in particular to electric vacuum electronic devices, and is an internal feedback type terahertz traveling wave tube oscillator. Background technique [0002] Regardless of the application of terahertz electromagnetic waves, a compact and efficient terahertz electromagnetic wave source is fundamental. According to the working principle, terahertz sources can be divided into two categories: optics-based terahertz sources and electronics-based terahertz sources. The former includes various infrared gas lasers, various laser-driven terahertz radiators, terahertz photoconductive antenna radiators, optical rectification radiators, nonlinear difference frequency radiators, terahertz parametric oscillators and amplifiers (TPG, TPO, TPA) And optical Cherenkov radiators, etc., the main disadvantage of such devices is the low power. The latter can in turn be differentiated i...

Claims

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Application Information

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IPC IPC(8): H01J23/16H01J23/40
Inventor 王自成赵建东李海强徐安玉董芳刘韦黄明光郝保良
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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