Radiating high frequency line

A high frequency radiating line for radiating electromagnetic energy in a frequency band and comprising at least one tubular conductor (23) surrounding a longitudinal axis (X) and having a plurality of apertures formed into a series of identical patterns (M1) repeated periodically with a period P along said line, characterized in that, for a frequency band of the type, where f.sub.r is a given frequency and N is a positive integer greater than 1, each of said patterns (M1) comprises N apertures numbered 0 to N-1 and satisfying the following equations:

• ##EQU10## where:
• the index k is an integer such that 1.ltoreq.k.ltoreq.N-1 and refers to the k'th aperture of one of said patterns (M1),
• z.sub.k is the distance between said k'th aperture and first aperture (F0) of said pattern, said distance being calculated between the projection of a point of an axis of symmetry of said first aperture (F0) on to said longitudinal axis (X) and that of a point of a corresponding axis of symmetry of said k'th aperture on to said longitudinal axis (X),
• a.sub.k is the polarizability of said k'th aperture,
• a.sub.o is the polarizability of said first aperture, ##EQU11## where E(x) designates the integer part of x, p.sub.k is an integer such that 1.ltoreq.p.sub.k .ltoreq.N+1, said integers p.sub.k being pairwise distinct, such that p.sub.k <p.sub.k+1, and different from p' and p".