Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Università Degli Studi Roma Tre

Luca Di Palma

Antonio Clemente

Laurent Dussopt

Filiberto Bilotti

Alessandro Toscano

Davide Ramaccia

Unit cell of a transmission network for a reconfigurable antenna

An antenna including: an array of individually-controllable elementary cells, each cell being capable of transmitting a radio signal by introducing into the signal a controllable phase shift selected from among at least two discrete phase-shift values; on the side of a first surface of the array, first, second, third, and fourth primary sources capable of respectively irradiating first, second, third, and fourth consecutive quadrants of the array; and a processing circuit capable of supplying a first signal representative of the sum of the signals S, S, S, and Ssupplied, respectively, by the first, second, third, and fourth sources, a second output signal representative of difference S+S&#x2212;S&#x2212;S, and a third output signal representative of difference S&#x2212;S&#x2212;S+S

Transmit-array antenna for a monopulse radar system

Embodiments of the present invention concerns an aperture antenna that comprises: a receiving element, which includes an aperture and is configured to receive, through the aperture, radio signals having frequencies within a given band of radio frequencies; a waveguide configured to receive radio signals from the receiving element; and a frequency selective structure, which is arranged between the receiving element and the waveguide, and comprises metamaterial structures that extend partially inside the receiving element and/or partially inside the waveguide and that are configured to cause the propagation, from the receiving element to the waveguide, of only the received radio signals that have frequencies comprised within a predetermined sub-band of the given band of radio frequencies. Furthermore, the frequency selective structure is configured to reflect back into the receiving element the received radio signals that have frequencies not comprised in the predetermined sub-band.

Low-noise-figure aperture antenna

Growing community of inventors

Rome, Italy

Luca Di Palma