Title :
Low-loss SAW filters with 70 dB sidelobes using cascaded and weighted single-phase unidirectional transducers
Author :
Campbell, C.K. ; Saw, C.B.
Author_Institution :
McMaster Univ., Hamilton, Ont.
fDate :
7/7/1988 12:00:00 AM
Abstract :
Close-in sidelobe suppression was attained in low-loss SAW filters with single-phase unidirectional transducers (SPUDTs), by Dolph-Chebyshev weighting of the SPUDT rungs. Two such structures electrically cascaded in a 1.5% bandwidth filter yielded an overall 70 dB sidelobe level, with an insertion loss of only 8.5 dB
Keywords :
crystal filters; passive filters; radiofrequency filters; surface acoustic wave devices; 8.5 dB; Dolph-Chebyshev weighting; RF filter; SAW filters; cascaded structure; insertion loss; low-loss; sidelobe suppression; single-phase unidirectional transducers;
Journal_Title :
Electronics Letters
