UHF tuner having frequency setting fine toned by varying characteristic impedance of resonant line
US4025882A · kind A · utility
8Cited by
5References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 17, 1975 |
| Grant date | May 24, 1977 |
| Priority date | — |
| Expiry date | Nov 17, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J1/14
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A radio frequency tuner for ultra-high frequency range provided with an improved fine tuning device in which a conductor plate member is movably disposed in the vicinity of a resonant line whose one end is connected to a variable capacity element for tuning and whose other end is connected to earth directly or through a capacitor, so that the characteristic impedance of the distributed constant line is varied by driving the conductor plate member toward or away from the resonant line for fine adjustments of the tuned frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.