High order mould multiple injection speed regulating tube output circuit

Abstract

The output circuit includes a resonant cavity in cuboid, and coaxial waveguide connected to resonant cavity to form T shape. Being located at middle of the resonant cavity, the metal barrier (known as coupled wall) divides the resonant cavity into two identical air gaps (known as interactive gap). –´ shaped coupling slot is made at area of about one third side length at middle of the coupled wall. In the coupled wall, one end of cross-shaped conductive rack is connected to inner conductor of coaxial waveguide. Penetrating through up / low basal faces of resonant cavity, well-balanced distributed apertures are built at two sides of coupled wall so as to form channels for electron beams. Arc chutes are made on outside of each aperture on the coupled wall. The invention raises efficiency, bandwidth, and working stability of klystron tube of multiple electron beams in higher mode.

Description

【Technical field】 [0001] The invention relates to a microwave source output circuit, in particular to a high-order mode multi-shot klystron output circuit. 【Background technique】 [0002] Multi-beam klystron is a very important type of high-power microwave source. Its basic working principle is: first, a weak microwave signal is input into the input cavity to modulate the speed of the DC electron beam, and then the electron beam passes through a drift tube. , so that the speed modulation is transformed into the density modulation of the electron beam, and the clustering of the electron beam is realized; when the electron beam enters the second cavity, the clustered electron beam will generate a high-frequency induced current in the gap of the second cavity, and the basic The wave component excites the resonance of the second cavity, and the gap voltage generated by the resonance performs a second speed modulation on the electron beam, and then allows the electron beam to pas...

AI Technical Summary

Problems solved by technology

exist figure 1 In the output circuit shown, since the coupling between the output cavity and the rectangular waveguide breaks the symmetry of the electromagnetic field distribution in the resonant cavity, the axial electric field near the coupling port and far away from the coupling port are very different, which aggravates the velocity dispersion of the electron beam. , leading to low efficiency of injection wave conversion, which greatly limits the improvement of the efficiency and output power of the whole tube, and the serious speed dispersion may also cause self-excited oscillation, making the whole tube unstable

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