Title :
Electrically cascaded surface-acoustic-wave resonator filters
Author :
Cross, P.S. ; Smith, Roy S. ; Haydl, W.H.
Author_Institution :
Fraunhofer Gesellschaft, Institut fÿr Angewandte Festkörperphysik, Freiburg im Breisgau, West Germany
Abstract :
Three nearly identical surface-acoustic-wave resonator filters at ¿ 35 MHz have been fabricated with aluminium metallisation on yz LiNbO3 substrates. The filters are electrically cascaded to yield a combined frequency response that exhibits 80 dB sidelobe suppression, Q ¿ 3000, no spurious responses in the range 1¿500 MHz and an insertion loss in a 50 ¿ system of only 13 dB.
Keywords :
acoustic surface wave devices; coupled circuits; filters; frequency response; 35 MHz; 80 dB sidelobe suppression; Al metallisation; electrically cascaded acoustic surface wave resonator filter; frequency response; yz LiNbO3 substrates;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19750184
