Distributed Attenuators With Uniform Electric Field
OwnerAnton Manolescuinventor
Life of this patent
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Abstract
An attenuator is described, obtained from a single resistive film deposited on an insulated substrate provided with three or more conductive terminals serving as input, output and common electrodes for electrical signals. These terminals are formed over the edges of the resistive film in a proper manner so as their position, lengths and the shape of the resistive film determine an uniform electric field and uniform current density lines throughout the resistive film with a precise ratio between the input current and the output current, and specific input and output resistances. The reliability of the attenuator is significantly improved.
Claims7
An attenuator, comprising:
- a single resistive film sheet shaped as a polygon, wherein the polygon has a plurality of edges, each edge being parallel with either a horizontal axis or a vertical axis;
- an input terminal, the input terminal being formed over the entirety of a corresponding edge of the input terminal;
- a common terminal being formed over the entirety of a corresponding edge or edges of the common terminal;
- and
- an output terminal being formed over the entirety of a corresponding edge or edges of the output terminal;
- wherein the corresponding edges of the input terminal, of the common terminal, and of the output terminal, are parallel to one another and are further parallel to one of the horizontal axis or the vertical axis;
- and
- wherein, in response:
- to coupling a signal source, having a pre-determined source resistance, between the input terminal and the common terminal, and
- to coupling a resistive load, having a pre-determined load resistance, between the output terminal and the common terminal;
- current density lines throughout the resistive thin film sheet are configured to be substantially parallel to one another.
Dependencies are inferred from the claim text.