Abstract: A luneberg type passive reflector for circularly polarized waves consists of a woven cloth made partially of conductive wires located within the dielectric sphere the surface of which is covered with a set of parallel wires perpendicular with the conductive wires in said cloth. The conductive wires of the cloth are less than five hundredths of wavelength in diameter and their spacing is between 1/4 and 1/20 of a wavelength. The wires interwoven with said metal wires to form the cloth are preferably made of flax.

Abstract: A wide relative frequency band and reduced size-to-wavelength ratio antenna comprising essentially a first part in the form of a conductor ring and a second part in the form of a skirt respectively connected to the central and outer conductors of a coaxial feeder. The first part has a conductive path in the form of a circumference and one of its diameters; the central conductor of the feeder is connected to the mid-point of the said diameter. The second part is in the form of a skirt and has a conductive path formed by a circular ring connected to one of the ends of each one of a plurality of conducting strands having the form of broken lines inscribed in isosceles trapezoid forming an assembly defining the faces of a frusto-pyramid, while an annular and conical end member is connected to the feeder outer conductor and is in contact with the other ends of the strands.

Abstract: A multi-rod broadband antenna consisting of a plurality of elementary radiators arranged as directrices of a cylinder each consisting of a conductor surrounded with a ferromagnetic core designed so that each one has a resonant frequency value different from any other one, the resonant frequency values being related so as to form a series. The arrangement of the rods around the cylinder is such that the frequency values of two adjacent rods do not correspond to two adjacent terms of the series.