Monolithic lattice saw filter
US4785270A · kind A · utility
18Cited by
6References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 30, 1987 |
| Grant date | Nov 15, 1988 |
| Priority date | — |
| Expiry date | Dec 30, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/6426
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A monolithic lattice SAW bandpass filter having low insertion loss and a wide bandwidth range is described herein. Specifically, the bandpass filter includes a monolithic piezoelectric substrate and two dual port SAW device disposed on the substrate and coupled in a full lattice circuit configuration. In a second bandpass filter design the filter includes a monolithic substrate and two sets of dual port SAW devices disposed on the substrate and coupled in a cascaded circuit configuration such that no electrical crossovers occurs on the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.