I.H.P. SAW Transverse Edge Design for Energy Confinement with Suppressed Scattering Loss and Transverse Mode

Due to dispersion characteristic of I.H.P. SAW devices, existing transverse edge designs cannot provide broadband energy confinement with scattering loss suppression. By studying dispersion curves at transverse cross-sections, a new transverse edge with double busbar is designed for I.H.P. SAW. This new design provides broadband energy confinement from resonant to anti-resonant frequency with suppressed scattering loss and suppressed transverse spurious mode. These features are validated by admittance and quality factor calculated from periodic 3D FEM powered by hierarchical cascading technique.