Ultra-wide-band saw sensor with hyperbolically frequency-modulated etched reflector
US11003971B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 1, 2020 |
| Grant date | May 11, 2021 |
| Priority date | — |
| Expiry date | May 1, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/02811
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
There is disclosed a surface acoustic wave sensor. An interdigital transducer (IDT) and a first reflector are formed on a surface of a piezoelectric substrate. The first reflector is displaced from the IDT in a direction of acoustic wave propagation. The first reflector includes a plurality of elongate reflective elements including a first reflective element and N additional reflective elements, where N is a positive integer. A long axis of each of the reflective elements is perpendicular to the direction of acoustic wave propagation, and a distance between adjacent reflective elements along the direction of acoustic wave propagation is a linear function of distance from the first reflective element along the direction of acoustic wave propagation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.