Ms. Vanessa Cunha Duarte Profile

Vanessa Cunha Duarte

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Publications (5)

Proceedings Article | 11 June 2021 Open Access

Miniaturised photonic front-end for the next generation of space SAR applications

T. Mengual, Vanessa Duarte, V. Polo, M. Piqueras, P. Sanchis, A. Brimont, D. Zurita, B. Chmielak, S. Suckow, A. Giesecke, E. Matarazzo, L. DiPalma, D. Maiarelli, H. Wang, P. Huggard

Proceedings Volume 11852, 1185255 (2021) https://doi.org/10.1117/12.2599928

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There is a natural trade-off between spacecraft size and functionality in all current satellite applications, independently of orbit and mission. Therefore, advances in both miniaturization and integration technologies are required to increase satellites’ lifetime and performance, simultaneously reducing their cost. In case of the next generation of Earth Observation satellites, one of the key development areas is synthetic aperture radar (SAR) antennas, where expected progress will be to increase the operating bandwidth - requiring, for instance wideband true-time delay (TTD) beamformers - and miniaturization, drastically reducing the mass and volume compared to current implementations. In this scenario, the use of photonic integrated circuits (PIC) technology in the beamforming network, in combination with an optical fibre harness, are obvious key enabling technologies for future SAR instruments. Optically implemented TTD beamforming structures achieve orders-of-magnitude improvements in size and mass compared with coaxial cable and RF switch based alternatives. Photonic technology also brings easy routing thanks to wavelength-division multiplexing, antenna and RF system integration due to the EMI -free characteristic of the optical fibre and a reduction of the risks associated with the in-orbit antenna deployment. Additionally, the inherent broadband characteristic of photonic technology, related to the transport and processing of RF signals, simplifies the beamforming network and signal distribution design for different frequencies, applications and missions. In the H2020 RETINA project (H2020-SPACE-2018-821943) a consortium formed by DAS Photonics, Airbus Italia, AMO GmbH, STFC Rutherford Appleton Laboratory and Universitat Politècnica de València is developing a miniaturised photonic front-end for next-generation X-band space SAR applications. In this article we present advances in design and fabrication of PIC for TTD, the design and predicted performance of multi element, dual polarisation antenna building blocks and photoreceivers for phase and amplitude controlled optical to RF conversion.

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Proceedings Article | 12 July 2019 Open Access

Modular and smooth introduction of photonics in high-throughput communication satellites – perspective of project BEACON

Vanessa Duarte, João Prata, Rogério Nogueira, Georg Winzer, Lars Zimmermann, Rob Walker, Stephen Clements, Marta Filipowicz, Marek Napierala, Tomasz Nasilowski, Jonathan Crabb, Leontios Stampoulidis, Javad Anzalchi, Miguel Drummond

Proceedings Volume 11180, 1118079 (2019) https://doi.org/10.1117/12.2536180

KEYWORDS: Signal to noise ratio, Phase shifts, Photonics, Signal processing, Photonic integrated circuits, Interference (communication), Signal attenuation, Satellite communications, Satellites, Signal detection

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Proceedings Article | 25 September 2017 Open Access

Coherent photonic beamformer for a Ka-band phased array antenna receiver implemented in silicon photonic integrated circuit

V. Duarte, A. Pęczek, M. Drummond, R. Nogueira, G. Winzer, D. Petousi, L. Zimmermann

Proceedings Volume 10562, 105621X (2017) https://doi.org/10.1117/12.2296131

KEYWORDS: Phase shifts, Phased arrays, Photonic integrated circuits, Phase shift keying, Signal attenuation, Antennas, Modulation, Thermal optics, Astronomical imaging, Ka band

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Proceedings Article | 22 August 2014 Paper

All-optical modulation format conversion from OOK to DP-QPSK based on fiber nonlinearity

Vanessa Duarte, Miguel Drummond, Rogério Nogueira

Proceedings Volume 9286, 92861M (2014) https://doi.org/10.1117/12.2063737

KEYWORDS: Polarization, Modulation, Phase modulation, Nonlinear optics, Error analysis, Phase shift keying, Dispersion, Signal analyzers, Complex systems, Quadrature amplitude modulation

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Proceedings Article | 18 November 2013 Paper

All-optical phase modulated format conversion for high transmission rates based on fiber nonlinearity

Vanessa Duarte, Miguel Drummond, Rogério Nogueira

Proceedings Volume 8785, 87854M (2013) https://doi.org/10.1117/12.2026209

KEYWORDS: Modulation, Phase shift keying, Dispersion, Interference (communication), Data conversion, Signal attenuation, Computer programming, Quadrature amplitude modulation, Adaptive optics, Optical amplifiers

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