Method for transforming bandpass filters to facilitate their production and resulting devices
US6870441B2 · kind B2 · utility
9Cited by
2References
44Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2001 |
| Grant date | Mar 22, 2005 |
| Priority date | — |
| Expiry date | Nov 26, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2260/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention concerns a method for optimizing elements of a narrow or intermediate band bandpass filter whereof the LC prototype has been determined. The invention is characterized in that it comprises steps which consist in: (i) breaking down several parallel or series capacitors of resonators with X elements, (ii) inserting pairs of transformers between the first and second separated element and the rest of the resonator, (iii) displacing the residual transformers to modify the impedance levels of the resonators, and (iv) absorbing the residual transformers by transformation. The invention also concerns the resulting filters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.