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

Makkonen, T.; Plessky, V. P.; Steichen, W.; Salomaa, M. M.
May 2003
Applied Physics Letters;5/12/2003, Vol. 82 Issue 19, p3351
Academic Journal
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%.


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