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 0:
1. An apparatus comprising:
a piezoelectric thin film located above a carrier substrate, wherein the piezoelectric thin film is one of an X-cut or a Y-cut lithium niobate (LiNbO3) thin film adapted to propagate an acoustic wave in at least one of:
a first mode excited by an electric field oriented in a longitudinal direction along a length of the piezoelectric thin film; or
a second mode excited by the electric field oriented at least partially in a thickness direction of the piezoelectric thin film;

a first interdigitated transducer (IDT) disposed on a first end of the piezoelectric thin film, the first IDT to convert a first electromagnetic signal, traveling in the longitudinal direction, into the acoustic wave; and
a second IDT disposed on a second end of the piezoelectric thin film with a gap between the second IDT and the first IDT, the second IDT to convert the acoustic wave into a second electromagnetic signal, and the gap to determine a time delay of the acoustic wave before output of the second electromagnetic signal.