Cavity filter coupling system
US8143973B2 · kind B2 · utility
1Cited by
3References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2008 |
| Grant date | Mar 27, 2012 |
| Priority date | — |
| Expiry date | Jul 20, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/2053
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The elliptical response bandpass filter according to the invention comprises a plurality N of cavities connected in series by means of in-phase coupling loops; the first cavity is in addition connected to the last by a complementary phase-inversion coupling loop in order to generate transmission zeros at determined frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.