Millimeter wave traveling wave tube composite cellpacking and preparation method thereof

Abstract

The invention relates to a millimeter wave traveling wave tube composite cellpacking and a preparation method thereof, belonging to the field of the vacuum electronic device. The composite cellpackingcomprises pole shoes of the focusing system used for the millimeter wave traveling wave tube. The composite cellpacking is characterized in that the pole shoes and nonmagnetic metal material rings are arranged axially at intervals and are welded and fixed together to form an integrated composite cellpacking. The length of the composite cellpacking and the lateral dimension of the pole shoes are both decided by the electrical parameter of the millimeter wave traveling wave tube. By using the composite cellpacking of the millimeter wave traveling wave tube, the lateral dimension of the whole tube and the inner diameter of the pole shoes are reduced to the minimum so as to meet the demand of the dimensions parameters of the whole tube, reduce the difficulty of the focusing control and benefit the heat conduction of the slow-wave system.

Description

technical field [0001] The invention belongs to the field of vacuum electronic devices, in particular to a composite shell of a millimeter wave traveling wave tube and a manufacturing method thereof. Background technique [0002] In the power traveling wave tube of electronic warfare equipment, the magnetic focusing system mostly adopts the periodic permanent magnetic focusing system (PPM). For centimeter-band traveling wave tubes, the coupling cavity of the slow-wave system is relatively large, and the iron pole piece can be used as a part of the magnetic focusing system, and can penetrate deep into the high-frequency cavity, which can easily realize the magnetic focusing of the electron beam. Such as figure 1 shown. [0003] For the traveling wave tube in the millimeter wave band, the overall size of the coupling cavity is small, and the pole piece cannot be used as a part of the magnetic focusing system like the traveling wave tube in the centimeter wave band. For trav...

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Problems solved by technology

[0004] The use of this magnetic focusing method has the following disadvantages: First, there is a gap between the pole piece and the shell, the pole piece is movable, and the adjustment during thermal measurement is troublesome, and it is difficult to ensure the consistency of the mass production of the tube

Second, because the shell has a certain thickness and the inner diameter of the pole piece is relatively thick, it increases the difficulty of focusing and the lateral size of the periodic permanent magnet focusing system (PPM), which increases the volume and weight of the tube, which is of great importance to the miniaturization of millimeter wave The design of the traveling wave tube is very unfavorable

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