Patent ID: 9064621
Filing Date: 2015-06-23
Classification: H01B

Abstract:
1. A parallel foamed coaxial cable, comprising: one or more pairs of inner conductors aligned in parallel; a foamed insulation covering together the inner conductors and having a cross sectional shape comprising an elliptical shape, a rounded-rectangular shape or a quasi-elliptical shape formed by combining a plurality of curved lines; a non-foamed skin layer covering the foamed insulation and having a maximum thickness in a major axis direction of the cross sectional shape of the foamed insulation and a minimum thickness in a minor axis direction of the cross sectional shape of the foamed insulation; an outer conductor covering the non-foamed skin layer; and an insulation jacket covering the outer conductor, wherein the maximum thickness of the non-foamed skin layer is not less than 1% of a major axis of the cross sectional shape of the foamed insulation such that a drag force applied by the non-foamed skin layer is sufficient along the major axis to counteract an expansion force applied by the foamed insulation covering to prevent said parallel one or more pairs of inner conductors from moving beyond a preselected distance from one another.