UHF tuner having frequency setting fine toned by varying charact

Details UHF tuner having frequency setting fine toned by varying charact UHF tuner having frequency setting fine toned by varying charact

1975-11-17

1977-05-24

Gensler, Paul L.

Tuners

With resonant line elements

With lumped capacitor in tuned circuit

334 51, 334 81, H03J 310

Patent

active

040258823

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.

REFERENCES:
patent: 2748354 (1956-05-01), Lavoo
patent: 2957984 (1960-10-01), Granquist
patent: 3105947 (1963-10-01), Foster et al.
patent: 3697904 (1972-10-01), Mohri et al.
patent: 3789331 (1974-01-01), Miner et al.

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