Alcatel

Frederic Croq

Thierry Rostan

Regis Lenormand

Philippe Voisin

Michel Gomez-Henry

Frederic Magnin

Michel Pauchet

The invention concerns an antenna with high scanning capacity. The antenna comprises a panel (,) of static radiating elements which are controlled to transmit in variable directions relative to a direction (,) perpendicular to the plane of the panel. Reflectors (,) amplify the scanning effected by the panel (,) of radiating elements. The reflectors (,) are segments of paraboloids with the same axis (,) and the same focus (,), for example.

Antenna with high scanning capacity

A radiating structure, or antenna, includes an exciter patch which receives an excitation signal and a plurality of secondary patches which radiate the waves received from the exciter patch. The structure includes a reflective surface in the vicinity of the exciter patch and the secondary patches constitute semi-reflective surfaces. The combination is such that the waves radiated by the secondary patches are substantially in phase. The distance between the reflective surface and the secondary patches is substantially equal to half the wavelength to be transmitted. The structure maintains the purity of circular polarization over a wide angular sector.

Radiating structure

A microwave resonant antenna includes a ring whose peripheral length determines the wavelength guided in the antenna. The ring incorporates meanders or crenellations. These have substantially radial parts so that, overall, they do not produce any field interfering with the circular polarization of a signal to be transmitted. An antenna of this kind lends itself to miniaturization. It is omnidirectional over a wide angle with a high degree of purity of circular polarization.

Miniature annular microstrip resonant antenna

An antenna includes a radiating resonant member for transmitting polarized microwaves. A first diffracting system radiates waves at an angle greater than the transmission angle of the radiating member. A second diffracting system corrects the purity of polarization of the waves for some directions at least.

Resonant antenna for transmitting or receiving polarized waves

A system with two concentric antennas for two bands of microwave frequencies includes between the two concentric antennas a system for eliminating or attenuating propagation of waves from the inner antenna to the outer antenna.

Growing community of inventors

Tournefeuille, France

Frederic Croq