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7.5GC 低温参量放大器总体设计是1978年初搞的。笔者想着重谈一谈搞结构设计的一些体会并把本频段机器上的一些典型结构做一粗略介绍,供同行业的同志们参考。(一)方案确定a.在此以前,我们曾研制了4GC 低温参量放大器,而7.5GC 频段因元器件尺寸变小(主要是环行器和参放本体),原样挪用4GC 的另部件就显得不可取了。例如4GC 频段真空罩较大,直径近φ190,而真空罩又是用锻铝棒车出来的,而7.5GC 频段只需要外径
7.5GC low temperature parametric amplifier overall design is engaged in early 1978. I would like to focus on some of the experience in structural design and some of the typical structure of the machine to do a rough introduction for the same industry comrades reference. (A) the program to determine a. Prior to this, we have developed a 4GC cryogenic parametric amplifier, and 7.5GC band due to component size smaller (mainly circulator and parametric body), the other parts of the original appropriation 4GC not got it. For example, 4GC band larger vacuum cover, diameter nearly φ190, and the vacuum cover is used forged aluminum bar out of the car, while the 7.5GC band only requires the outer diameter