Andrew Corporation

Leonard J Visser

James A Krabec

Jack L Knowles

Bruce Carlson

Sitaram Rampalli

A corrosion-resistant radio-frequency coaxial cable includes an inner conductor, a layer of dielectric material surrounding the inner conductor and an outer conductor comprising a laminate surrounded by at least one braided aluminum wire sheath. The laminate includes at least one layer of aluminum foil bonded to a substrate, where substrate is longitudinally wrapped about the dielectric material. A jacket of weather-proofing material surrounds the braided sheath. A corrosion-inhibiting coating is applied to the aluminum foil of the laminate, which coating is formed of a wax acid polyester. The wax acid polyester includes the compounds of a polybasic acid or anhydride, a polyol, and an effective amount of a lanolin wax acid to form a wax polyester in situ coating. The wax acid polyester is formed by the in-situ reaction of an aqueous emulsion of a polybasic acid or anhydride, a polyol and an effective amount of a lanolin wax acid.

Corrosion protected coaxial cable

A helical corrugated coaxial cable possesses low cost of manufacture comparable to that of braided shield coaxial cable, electrical performance comparable to solid tubular shielded cable, flexibility of helical and annular corrugated cable, and fluid blockage comparable to annular shielded cable. The cable has an inner conductor surrounded by a foam dielectric insulator. A tubular shield surrounds the dielectric and has helical corrugations penetrating into and compressing the foam dielectric to effectively suppress the formation of fluid migration air gaps or passageways between the shield and the dielectric. The shield is preferably composed of aluminum or aluminum alloy. Alternatively, the shield may be annularly corrugated for improved water blocking performance. The manufacturing process employs high speed welding and multi-lead corrugating operations to reduce cost.

Method of manufacturing a high-performance, water blocking coaxial cable

Low-cost, high performance, moisture-blocking, coaxial cable and manufacturing method

A radiating air-dielectric coaxial cable for plenum applications comprises an inner conductor; a non-halogenated dielectric spacer around the inner conductor; and a single, continuous, outer conductor surrounding the dielectric spacer in direct contact therewith. The outer conductor has apertures along its length for the passage of electromagnetic radiation. At least one layer of inert, flame-retardant barrier tape is wrapped over the outer surface of the outer conductor so as to cover each of the radiating apertures of said outer conductor to prevent the dielectric spacer from flowing out through the radiating apertures when the dielectric material is melted. A jacket of halogenated, highly flame-retardant polymer is extruded over the wrapped layer of barrier tape.

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Frankfort, IL, United States of America

Leonard J Visser