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为了要完成以国内卫星通信为对象的地面站任务,就必须积累多种技术。本文叙述有关低噪声接收装置的设计准则和试制结果。本装置在一个机架中安装4千兆赫和18千兆赫参量放大器,传输带宽分别为500兆赫和600兆赫,增益为43分贝和30分贝。本装置为了达到低噪声目的而采用液氦冷却至4.5°K,其噪声温度分别为17°K 和125°K。这些设备都设置在天线基座内,直接与分波器联接,而其工作可由实验室进行遥控。
In order to complete the mission of a ground station for domestic satellite communications, a variety of technologies must be accumulated. This article describes the design criteria and trial results for low noise receivers. This device installs 4 GHz and 18 GHz parametric amplifiers in a single rack with transmission bandwidths of 500 MHz and 600 MHz, respectively, with gains of 43 dB and 30 dB. This unit uses liquid helium to cool to 4.5 ° K for low noise, with noise temperatures of 17 ° K and 125 ° K, respectively. These devices are located in the antenna base, directly connected to the demultiplexer, and its work can be remote controlled by the laboratory.