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本文綜合介紹毫米波的应用和产生方法。先分析提高电子管运用频率所受的限制,並說明各种现有微波管在毫米波段的發展,然后介紹利用契林科夫效应、波盪器及分子束振盪器产生毫米波的原理。 (一) 毫米波的应用毫米波(1—10毫米)段的应用,首先是在雷达中,使我們可以用尺寸不大而方向性極强的天綫,来增加雷达的鑑別率,並相对地提高共有效輻射电功率。在毫米波段,大气中各种气体分子对电磁波有不同的諧振波長,諧振时吸收作用大,傳播損耗也大,如圖1所示。由圖可見一般損
This article describes the millimeter wave application and production methods. Firstly, it analyzes the limitation of increasing the frequency of the electron tube and explains the development of various existing microwave tubes in the millimeter wave band. Then, the principle of using the Cheeringkov effect, the undulator and the molecular beam oscillator to generate the millimeter wave is introduced. Applications of Millimeter Waves The application of millimeter wave (1-10 millimeter) segments, first in the radar, allows us to increase the radar discrimination rate by using antennas of small size and strong directivity, and relatively Increase the total effective radiation power. In the millimeter wave band, various kinds of gas molecules in the atmosphere have different resonant wavelengths for electromagnetic waves, and have a large absorption effect at resonance and a large propagation loss, as shown in FIG. 1. Can be seen from the general loss