Patent ID: 11916533
Assignee: nan
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A radio-frequency filter comprising:
an input node for receiving a signal;
an output node for providing a filtered signal; and
a surface acoustic wave device implemented to be electrically between the input node and the output node, the surface acoustic wave device configured to provide resonance of a surface acoustic wave having a wavelength λ and including a quartz substrate and a piezoelectric plate formed from LiTaO3 or LiNbO3 and disposed over the quartz substrate, the piezoelectric plate having a thickness greater than 2λ, the surface acoustic wave device further including an interdigital transducer electrode formed over the piezoelectric plate, the interdigital transducer electrode having a mass density ρ in a range 1.50 g/cm3<ρ≤6.00 g/cm3, 6.00 g/cm3<ρ≤12.0 g/cm3, or 12.0 g/cm3<ρ≤23.0 g/cm3, and a thickness greater than 0.148λ, greater than 0.079λ, or greater than 0.036λ, respectively.