Publicado 12 números por año
ISSN Imprimir: 0040-2508
ISSN En Línea: 1943-6009
Indexed in
Hyperrsonic Delay Lines of Microwave Signals
SINOPSIS
Hypersonic delay lines (HDLs) of microwave signals were suggested for the first time in IRE of Ukrainian NAS in 1961. Physical foundations for the HDL analysis and new line of science and engineering have been provided for development of the memory devices dedicated to the signal processing of microwave radiolocation. The overview of main results of the works carried out in IRE NASU is given in this paper. The principles have been considered, on which the transformation of electromagnetic waves into hypersonic ones is based. The method of hypersonic excitation by a surface slowed electromagnetic wave and the point transformation method with using piezoelectric ZnO films have been described. The main mechanisms of hypersonic absorption in crystalline acoustic guides at room and cryogenic temperatures have been considered. Effect of the longitudinal conversed hypersonic scattering in dielectric crystals at low temperatures is represented. This effect was discovered and studied in IRE NASU. The designs of broadband HDLs with uncooled acoustic lines and HDLs with effect of the conversed hypersonic scattering, have been described.