Helical resonator
US4052684A · kind A · utility
3Cited by
2References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 6, 1976 |
| Grant date | Oct 4, 1977 |
| Priority date | — |
| Expiry date | Jul 6, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P7/005
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A helical resonator includes a helical coil within a metal enclosure, with the windings at one end of the coil reduced in diameter and shorted to each other so as to form a cylindrical conductive member. The cylindrical conductive member provides one plate of a variable capacitor the other plate of which is partially formed by one wall of the enclosure which is adjacent to the windings of reduced diameter. A screw extends through the one wall of the enclosure and into the cylindrical member. An adjustment of the screw controls the resonant frequency of the cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.