Variable attenuator

Wave transmission lines and networks – Attenuators

Patent

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Details

338128, 338138, 338174, H03H 726

Patent

active

041468538

ABSTRACT:
A main resistance element and an elongated conductor are arranged coaxially and a plurality of secondary resistance elements are arranged radially and connected between the main resistance element and the conductor. A slider is ohmically movable on the main resistance element to provide a variable attenuator with low impedance and logarithmic attenuation to at least -60 db. An auxiliary resistance element may be provided coaxially with the main resistance element and the conductor with another set of secondary resistance elements connecting the auxiliary resistance element with the conductor, the ends of the main and auxiliary resistance elements being connected together.

REFERENCES:
patent: 2517180 (1950-08-01), Davis
patent: 2536501 (1951-01-01), Hood et al.
patent: 3341790 (1967-09-01), Candilis
patent: 3740676 (1973-06-01), Garuts
patent: 3824506 (1974-07-01), Bacher
patent: 4035747 (1977-07-01), Hindermayr et al.

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