Thomas Merlet

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We present and experimentally demonstrate an optical beamformer for the receive mode based on optical summation and dispersive fiber. This architecture allows a high number of simultaneous beams without multiplying the number of active elements. The incoherent optical summation based on wavelength division multiplexing is analyzed in term of RF dynamic(More)
The additive RF phase noise of a microwave photonics link is measured using, as the optical source, a semiconductor laser operating in the class-A regime. The relative intensity noise of this laser being below the shot noise relative level, the phase noise floor of the link is shown to be shot noise limited, -152 dBc/Hz in our experimental conditions. As a(More)
We propose and experimentally demonstrate two optical architectures that process the receive mode of a p x p element phased-array antenna. The architectures are based on free-space propagation and switching of the channelized optical carriers of microwave signals. With the first architecture a direct transposition of the received signals in the optical(More)
One of the growing trend in antennas is to address multifunctional systems, providing direct space saving and cost reduction. A consideration for future generation antennas is to replace the classical planar geometry with new functionalities. Three-dimensional (3-D) / conformal antennas offer significant advantages for such system. However, traditional(More)
Existing missile radar seekers use a mechanical rotating antenna to steer the radiating beam in the direction of the target. Recent research is investigating the possibility to replace the mechanical RF seeker with a novel 3D conformal antenna, embedded below the radome, that can steer the beam electronically. 3D conformal antenna arrays may offer many(More)
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