Varactor-tuned helical resonator filter
US4459571A · kind A · utility
18Cited by
7References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1982 |
| Grant date | Jul 10, 1984 |
| Priority date | — |
| Expiry date | Dec 20, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/2053
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A helical cavity resonator filter utilizes varactor tuning diodes positioned within each helical resonator coil. The diodes are positioned along the longitudinal axes of the coils so as not to interfere with the non-axial electromagnetic fields of the cavities associated with each helical resonator coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.