Simple microwave window

Abstract

This invention discloses a kind of simple output window. In the microwave window that is sealed with vacuum rubber band, dielectric sheet with metal layer replaces general dielectric sheet without metal layer and uses as window sheet. When dielectric window sheet with metal layer and rubber band are pressed firmly, it is also vacuum sealing functioned. The dielectric sheet with metal layer and window flange of slot positioned rubber band are firmly electric-contacted, it makes shielded rubber band influences electromagnetic field. The metal layer in dielectric window sheet corresponding waveguide inner cross section part is eat off beforehand so as to ensuring that microwave can pass. When using dielectric sheet without metal layer as window sheet, the coefficient of standing wave increases because the existence of rubber band equivalently increases the size of dielectric sheet. In order to decrease the coefficient of standing wave, the size of window sheet must be decreased. It makes rubber band can not be pressed firmly. This invention is simple, low-cost and low-wasting. The coefficient of standing wave is small.

Description

technical field [0001] The invention belongs to the field of microwave technology, in particular to high-power microwave technology. Background technique [0002] Microwave windows are an important part of microwave electric vacuum devices. Microwave windows are also used in some microwave components that need to be vacuumed or filled with special low-pressure gas. While destroying, microwaves can pass through smoothly. Obviously, the basic requirements for microwave windows are good airtightness, low microwave loss, and small standing wave coefficient. The microwave windows in traditional microwave tubes are all made of microwave low-loss dielectric materials such as ceramics and gemstones, and are manufactured by direct brazing with the metal structural materials of the window. -5 ~10 -7 The vacuum degree of Pa, the standing wave coefficient is small, generally around 1.2, or even smaller. [0003] The high-power microwave source and its microwave system are generally ...

AI Technical Summary

Problems solved by technology

Only when the size of the dielectric window reaches 60mm×31.5mm, which is smaller than the size of the inner section of the waveguide, can the standing wave coefficient drop below 1.2. Obviously, such a size cannot be used at all.

[0006] Since the rubber ring itself is also a dielectric material, the existence of the rubber ring actually increases the size of the dielectric window equivalently, resulting in an increase in the standing wave coefficient of the microwave window. To overcome the influence of the sealing rubber ring, two methods can be used. One is to reduce the size of the media window itself to offset the equivalent effect of the rubber ring, but as the above calculation example shows, this will cause the size of the media window to be too small, and it is impossible to compress the rubber ring to play a sealing role; Another approach is to shield the influence of the sealing ring without reducing the size of the dielectric window. The present invention is proposed based on this idea

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