Patent ID: 11942920
Assignee: THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOIS
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 21:
22. A method comprising:
converting, by a first interdigitated transducer (IDT) disposed on a first end of a piezoelectric thin film, a first electromagnetic signal traveling in a longitudinal direction along a length of the piezoelectric thin film into an acoustic wave, wherein the piezoelectric thin film is one of an X-cut or Y-cut lithium niobate (LiNbO3) thin film located above a carrier substrate;
propagating the acoustic wave in at least one of:
a first mode excited by an electric field oriented in the longitudinal direction; or
a second mode excited by the electric field oriented at least partially in a thickness direction of the piezoelectric thin film;

converting, by a second IDT disposed on a second end of the piezoelectric thin film, the acoustic wave into a second electromagnetic signal after a delay determined by a gap between the first IDT and the second IDT; and
outputting the second electromagnetic signal.