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Surface-acoustic-wave devices for the 2.5–5 GHz frequency range based on longitudinal leaky waves

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4 Author(s)
Makkonen, T. ; Materials Physics Laboratory, Helsinki University of Technology, P.O. Box 2200 (Technical Physics), FIN 02015 HUT, FinlandTEMEX Microsonics, 06904 Sophia Antipolis, France ; Plessky, V.P. ; Steichen, W. ; Salomaa, M.M.

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The recently discovered “longitudinal leaky” surface acoustic wave on YZ-cut lithium niobate has been used to implement low-loss bandpass filters operating in the 2.5-GHz Bluetooth frequency range. The filter is of the ladder type, employing synchronous resonators as building blocks. Resonator Q-values above 300 have been measured. The filter features a center frequency of 2491 MHz, a minimum insertion loss of 3.5 dB, and a fractional 3-dB bandwidth as wide as 6.2%. © 2003 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:82 ,  Issue: 19 )