Kabel-und Metallwerke Gutehoffnungshutte Aktiengesellschaft

Gerhard Dunker

Helmut Hildebrand

A radiating cable is constructed from an inner conductor and a concentric outer conductor being separated from each other by a dielectric spacer; the outer conductor has openings of similar size and configuration but their density varies periodically in axial direction. In one example, the openings are arranged in circumferential rows and axial rows, the number of openings for circumferential row varies periodically in axial direction. In another example, a single axial row has its openings spaced in a periodically variable spacing.

Radiating cable

A regular, radiating coaxial transmission line is improved by covering it with an insulating coating; similar, cylindrical, radiating elements are equidistantly placed on the line and at a center-to-center distance equal to the wavelength of the center frequency of the h.f. band as transmitted in and through the line.

Growing community of inventors

Hanover, Germany

Gerhard Dunker