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本文描述了第一个46千兆赫的20K致冷简并式参量放大器。它使用了新的20K致冷环流器和肖特基势垒变容管。它的噪声温度小于60K,这比以前非致冷的放大器几乎降低了一个数量级。
This article describes the first 46 GHz 20K cooled degenerate parametric amplifier. It uses the new 20K refrigeration circulator and Schottky barrier varactors. Its noise temperature is less than 60K, which is almost an order of magnitude lower than previously uncooled amplifiers.