A distributed amplifier having a plurality of successively coupled field effect transistors with cascaded gate electrodes and cascaded drain electrodes. A first one of such transistors has the gate electrode thereof coupled to an input terminal adapted to receive an input radio frequency signal and the drain electrode thereof coupled to a dc drain electrode bias circuit. The last one of the successively coupled field effect transistors has the gate electrode thereof coupled to a dc gate electrod...

An RTD (resistance temperature sensor or detector) sensing device which is a long, thin, unitary device adapted to be distributed across an extended field for the continuous, uninterrupted sensing or interrogation of such field, avoiding the inaccuracy, unreliability, and excessive expense of conventional "point" RTD and thermocouple sensors currently employed for this purpose. According to the invention, a very long, thin, ductile protective metal outer sheath houses a coextensive body of insul...

A distributed accumulator integral constructed to form a hydraulic line for interconnecting components. The accumulator includes a non-porous flexible convoluted inner tube resiliently supported in a closed-cell, plastic foam shell, both being supported in a structural tubing member serving as containment piping.

An RTD (resistance temperature sensor or detector) sensing device which is a long, thin, unitary device adapted to be distributed across an extended field for the continuous, uninterrupted sensing or interrogation of such field, avoiding the inaccuracy, unreliability, and excessive expense of conventional "point" RTD and thermocouple sensors currently employed for this purpose. According to the invention, a very long, thin, ductile protective metal outer sheath houses a coextensive body of insul...

A distributed amplifier tube comprising a plurality of pentode units (that is, electrode assemblies for pentodes) enclosed within an integral vacuum envelope along with transmission lines and arranged so as to constitute a distributed amplifier of minimum parastic inductance and capacitance as well as of minimum coupling between the input and output transmission lines.

An electrical device is described herein which has an input impedance of substantially constant phase angle over a limited frequency range. It consists of a distributed circuit having a capacitive and resistive medium between two electrodes, of appropriate properties. Implementations can use thin film techniques or monolythic techniques.

A filter of the distributed constants type which has a dielectric substrate, a transmission line electrode and at least one branch electrode on the dielectric substrate, the branch electrode being connected to the transmission line electrode. This filter is advantageous because it is capable of easily eliminating or passing various frequency bands by changing the structure of the electrodes on the dielectric substrate. Further, wide band elimination and/or large attenuation can be easily achieve...

A distributed resistance-capacitance component formed of windings of dielectric films having patterns of metallized layers formed thereon with margins shaped to provide a distributed resistance along the metallized layers and capacitance between the metallized layers on opposite sides of the dielectric films. Electrodes and leads are secured at opposite ends of the wound coil by metal spraying or schooping.

A distributed temperature sensor, in the form of a coaxial cable terminated in its characteristic impedance, comprising: an inner metallic conductor; a cylindrical, flexible, nonconductive material, surrounding the metallic conductor, having a plurality of axial voids extending throughout the length of the cable; a temperature-sensitive dielectric filling the axial voids, the voids being plugged at each end; an outer conductor surrounding the nonconductive material; and an optional elastomeric j...

A microwave dispersive network for wideband signal processing systems is disclosed in which a plurality of all-pass, quarter-wave, coupled transmission lines constructed in dielectric stripline are connected in cascade to synthesize a desired dispersive characteristic.