SURFACE-ACOUSTIC-WAVE FREQUENCY-SELECTIVE MATRIX Russian patent published in 1998 - IPC

FIELD: radio engineering; radio communications and radar engineering; frequency synthesizers, retunable receivers and transmitters, etc. SUBSTANCE: matrix has piezoelectric acoustic line, two groups of filters forming matrix in frequency range and placed in acoustic line, input and output splitters, m + n channel switches, and switch control device; group of line filters is made in the form of m-channel multiple-resonance (comb- type} interdigital transducers; group of column filters may be made in the form of n-channel multiple-resonance (comb-type) interdigital transducers. Novelty is that two groups of filters are arranged on acoustic line in parallel, in different acoustic channels, and intercoupled through multistrip coupler. EFFECT: improved frequency and electric characteristics. 2 dwg