Microwave output window and manufacturing method thereof

Abstract

The invention provides a microwave output window and a manufacturing method thereof. The microwave output window comprises a first metal diaphragm, a second metal diaphragm, a first protection ring, and a second protection ring. The microwave output window enables microwaves in a dielectric window plate to be in the state of travelling waves, the field intensity in the dielectric window plate can be substantially reduced, the breakdown and damage to the dielectric window plate by high frequency is prevented, and higher power capacity than a common box-type window is obtained; the protection rings increase the surface area of a welding position of the dielectric window plate and a circular waveguide, the field intensity of the welding position is further reduced, and the breakdown and damage to the dielectric window plate by high frequency is avoided; the thickness of the dielectric window plate is small, the dielectric loss is low, and the loss power of the dielectric window plate is reduced; and the protection rings reduce the sealing difficulty of the dielectric window plate and improve the welding reliability between the dielectric window plate and the circular waveguide.

Description

Technical field [0001] The invention relates to the technical field of high-power vacuum electronic devices, in particular to a microwave output window and a manufacturing method thereof. Background technique [0002] The development of large-scale scientific experimental devices such as high-energy accelerators, colliders, and free electron lasers has put forward demands for klystrons with power levels of tens to hundreds of megawatts. The design, production and testing of this kind of klystron is very difficult, especially in its output window components. The output window has two functions in the klystron. One is to ensure the vacuum isolation of the klystron from the outside world, and the other is to efficiently transmit microwave energy to the external load. With the increase of the microwave power level, the field strength at the dielectric window of the output window increases sharply, which is prone to high-frequency breakdown and damage the dielectric window. For this...

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Problems solved by technology

[0005] (1) In ordinary box-type windows, the microwave field in the dielectric window exists in the form of standing waves, and the electric field strength is large, which is easy to cause high-frequency breakdown;

[0006] (2) The dielectric window is thick, which is easy to cause oscillation mode, and the dielectric loss is large;

[0007] (3) No protective measures are taken at the welding place between the dielectric window and the circular waveguide, and the inhomogeneity caused by welding is likely to cause high-frequency breakdown; limited by the above technical defects, the power capacity of ordinary box-type windows is low

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