The complete spatial angle scanning electronic antenna with spatially randomly distributed, diluted radiators arranged.

摘要

This antenna is an antenna, called "the steric", that is - to - say consisting of a fixed network 1 comprising a plurality of elementary antennas 3 to the individual radiation almost - omnidirectional distributed according to a law of random distribution statistically isotropic inside an envelope volume of revolution 2, the spacing between antennas being appreciably greater than a half - wavelength of the minimum frequency to receive or send, and each elementary antenna being connected to an active module 6 of the phase shifting means which are individually controllable them - same connected to the timing means 7 which are common. / p & & p & according to the invention, the elementary antennae 3 are constituted of dipoles are oriented vertically and fed by a power supply line 4, 5, comprising a first section 4, extending horizontally between the respective dipole and a vertical mast common 9 coaxial with the envelope volume of revolution 2, and a second section 5 extending inside the mast 9 and leading to the timing means 7. / p & & p & the antenna thus produced has a vertical polarization, advantageous in many cases (marine secondary radars) with, because of the use of simple dipoles, a very low equivalent surface, which makes it very little observable. / p & & p & in addition, the first section 4 of the supply lines can be easily understood, thanks to this structure, constitute the means, the self-supporting, of a mechanical support of the dipoles on the vertical mast common 9, for example constituted by the mast of a ship.