Reduced length tuned filter having transverse oriented coils
US5770983A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1996 |
| Grant date | Jun 23, 1998 |
| Priority date | — |
| Expiry date | Dec 12, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H7/0115
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention provides a tuned filter of reduced overall length in which two coils (air core inductors) are placed side by side, in mounting locations that are transverse with respect to the longitudinal direction of the filter, instead of in-line or diagonal to each other. The transverse mounting of the coils, depending on the number of poles in the filter, results in a reduction in the overall length of the filter to at least 25% to greater than 50% than can be realized in comparison to conventional in-line filter designs. In addition, the transverse mounting configuration results in an improvement in the electrical performance for both the in band and high frequency responses of the tuned notch filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.