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Low-loss SAW filters with 70 dB sidelobes using cascaded and weighted single-phase unidirectional transducers

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2 Author(s)
Campbell, C.K. ; McMaster Univ., Hamilton, Ont. ; Saw, C.B.

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

Published in:

Electronics Letters  (Volume:24 ,  Issue: 14 )