P2N-1 Suppression of Spurious Responses for Ultra-Wideband and Low-Loss SAW Ladder Filter on a Cu-grating/15�YX-LiNbO3 Structure

Parameter extraction of coupling-of-modes equations including coupling between two surface acoustic waves on SiO2/Cu/LiNbO3structures

“…It is known that both Rayleigh and shear horizontal (SH) SAWs exist on the Θ degree rotated Y-cut LiNbO 3 substrate, and one of their responses can be suppressed completely by adjusting Θ properly. [7][8][9][10][11][12][13][14] When Θ is set close to 128°, the Rayleigh SAW is predominantly excited and the SH SAW is scarcely excited. [15][16][17][18][19][20][21][22][23][24][25] However, its complete suppression is not easy because the electromechanical coupling factor K 2 for SH SAW changes rapidly with Θ, and its optimal value for the SH SAW suppression also depends on the electrode material and thickness.…”