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报告研究的全是微波超导接收机技术。 报告对约瑟夫逊混频器的工作原理(包括适合解析、计算机研究的数字模型特性和在直流伏安特性中微波产生的严格阶梯公式)进行了分析。在10到15GHz范围内对约瑟夫逊混频作用进行了实验观察,其结果与理论一致。 已经测得了约瑟夫逊混频器的变频损耗,噪声系数和灵敏度。在13GHz时,用点接触可检测的最小信号为-90dbm/MHz(测量的)和-105dbm/MHz(校正的)。 用真空沉积法存低损耗的烧结铝基片上沉积铅,已做成了在10到15GHz范围内工作的小型超导微带谐振器。 在4.2和1.8K时分别测得的空载Q值(14.3GHz)高达200,000和500,000。使用真空沉积法能够同时制做许多插入损耗低、边沿抑制好的小型多元滤波器和预选器。
The report is all about microwave superconducting receiver technology. The report analyzes the working principle of the Josephson mixer, including the digital model features suitable for analysis, computer research, and the strict staircase formulas for microwave generation in DC volt-ampere characteristics. In the range of 10 to 15GHz, the mixing effect of Josephson experiment was observed. The result is consistent with the theory. The Josephsson mixer frequency conversion loss, noise figure and sensitivity have been measured. At 13GHz, the minimum detectable signals with point contact are -90dbm / MHz (measured) and -105dbm / MHz (corrected). Lead has been deposited on vacuum-deposited low-loss sintered aluminum substrates and small superconducting microstrip resonators operating in the 10 to 15 GHz range have been fabricated. The free-load Q (14.3 GHz) measured at 4.2 and 1.8 K were as high as 200,000 and 500,000, respectively. Using the vacuum deposition method enables the simultaneous fabrication of many small multivariate filters and preselector with low insertion loss and suppressed edges.