Mode trapped magnetostatic wave (MSW) filters and channelizer formed therefrom
US5017896A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1990 |
| Grant date | May 21, 1991 |
| Priority date | — |
| Expiry date | Jan 16, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2/001
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In the present invention magnetostatic wave (MSW) filters of the delay line and resonator type responsive to multimode MSW signals trap a desired MSW mode of the signal and attenuate untrapped modes of the signal in order to provide a higher order band rejection characteristic. In a preferred embodiment a low loss YIG film is disposed on a substrate. An apertured metallization layer on the YIG film defines a region of MSW propagation within the aperture and a metallization layer at the opposite side of the YIG film traps a selected MSW mode in said aperture. A region of high attenuation for MSW waves adjacent the desired propagation region absorbs untrapped MSW waves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.