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本文略述新型的脉泽概念并描述独特的设计方法,通过低温环行器将四级脉泽串联可得到宽的带宽和宽的波导可调范围。包括有增益、带宽、增益波动和噪声温度的理论考虑。工作在带超导磁体的闭环氦制冷机上,四级放大器从18.3到26.6千兆周可调,净增益30分贝,在接近这个通带中心的3分贝带宽达240兆周。由室温输入法兰测得噪声温度为13±2K。可以预言,对于射电天文学和星际宇宙飞船通讯,利用低温参量下变频器和上变频器,以这个脉泽作中频放大器,将其低噪声性能扩展到上至毫米波频率下至 L 波段是大有前途的。
This article outlines the new concept of maser and describes a unique design approach that provides a wide bandwidth and a wide waveguide tunable range by cascading four qubits in a low temperature circulator. Including the gain, bandwidth, gain fluctuations and noise temperature theoretical considerations. Working on closed-loop helium refrigerators with superconducting magnets, the four-stage amplifier is adjustable from 18.3 to 26.6 giga-cycles with a net gain of 30 dB and a 3-dB bandwidth close to the center of this passband of 240 megabit cycles. The noise temperature measured by room temperature input flange is 13 ± 2K. It can be predicted that, for radio astronomy and interstellar spacecraft communications, low temperature parametric downconverters and upconverters are used as IF amplifiers in this maze to extend their low noise performance up to millimeter wave frequencies up to the L band Future