Superconductive Microwave Slow Wave Structures.

摘要

The significance of this research and development to the Air Force is given by possible improvements of radar systems by using superconducting devices. The report describes the study of three superconductive microwave devices; a highly compact non-dispersive delay line, a pulse compression circuit,and a switching element whose resonant frequency can be varied electrically. It has been established that by use of simple evaporation and photo-etching techniques,non-dispersive microstrip lines with storage times of several tens of microseconds and gigahertz bandwidths can be constructed. The pulse compression study has shown that compression ratios of over 1,000may be feasible using a superconductive slow wave structure in which radiation losses are negligible. However such a structure may be impractically large. It has also been shown that superconducting resonant lines with Q-values of several hundreds can be constructed whose resonant frequencies can be switched at millisecond speeds. It is expected that the switching speed can be increased to the megacycle range in an improved structure. (Author)