Frequency tunable RF filters via a wide-band SAW-multiferroic hybrid device
US10601400B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Aug 13, 2018 |
| Grant date | Mar 24, 2020 |
| Priority date | — |
| Expiry date | Nov 7, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2240/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A filter including a piezoelectric substrate; a surface acoustic wave (SAW) device on the piezoelectric substrate and including unequally spaced interdigitated input and output transducer electrodes of unequal widths, wherein the input transducer electrodes are to convert an incoming radio frequency (RF) electrical signal into surface acoustic waves; a SAW propagation path between the input and output transducer electrodes; and a magnetostrictive film in the SAW propagation path to filter the surface acoustic waves that are at a ferromagnetic resonance frequency of the magnetostrictive film, wherein the output transducer electrodes are to convert the filtered surface acoustic waves into an outgoing electrical RF signal. The SAW device may operate in a wide-band pass configuration. The wide-band pass configuration result in a transmission of frequencies up to −60 dB. The magnetostrictive film may include a ferromagnetic material. The interdigitated input and output transducer electrodes may include unequal widths between adjacent electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.