Patent ID: 7498906

Claim:
A radiated mode coaxial cable, comprising: an outer conductor provided with a periodic aperture array, comprising a plurality (n) of apertures or aperture sets, repeated along the length of said outer conductor, wherein a constant spacing (s) separates a first end of the first aperture of one array of the periodic aperture array and the first end of the first aperture of a next array of the periodic aperture array wherein each array of n apertures comprises at least 10 apertures or aperture sets, wherein the (n) apertures or aperture sets have a global length L in the direction transverse to the cable axis at least equal to (10D/n) 1/2 , where D is the diameter of the cable and wherein the aperture spacing (d) in between two successive apertures or aperture sets is larger than 1.5w; where w is the aperture width in the cable longitudinal axis direction and wherein the spacing (s) between successive aperture arrays is selected so that λ opt.1 /(√ε r −0.866)< s<λ opt.2 /(√ε r −1); where λ opt.1 and λ opt.2 are respectively the upper and lower limits of the optimal wavelength range, the radiated mode coaxial cable is designed for, and where ε r represents the relative dielectric constant of the radiating cable.