Optical distribution of microwave signals for Earth Observation satellites

Palacio, Rafael; Deborgies, F.; Piironen, P.

doi:10.1109/mwp.2010.5664200

Cited by 10 publications

(5 citation statements)

References 4 publications

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“…For example, optical fibers can be used to overcome the limitations in terms of weight, flexibility, size, cost, bandwidth, attenuation, and frequency dispersion of electronic feed networks. Notably, the last two advantages make them suitable for delay generation for beamsteering and phase reference distribution to large arrays [6,9]. Optical technology also allows higher electro-magnetic interference (EMI) immunity [9,10], and the possibility to optically multiplex different functions in the same network provides further benefit in the aspects described above [6,11,12].…”

Section: Introductionmentioning

confidence: 99%

System integration and radiation pattern measurements of a phased array antenna employing an integrated photonic beamformer for radio astronomy applications

et al. 2012

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In this paper we describe the system integration and the experimental demonstration of a photonically beamformed four-element receiving array antenna for radio astronomy applications. To our knowledge, the work described here is the first demonstration of the squint-free, continuously tunable beamsteering capability offered by an integrated photonic beamformer based on optical ring resonator true-time-delay units, with measured radiation patterns. The integrated beamformer is realized in a low loss, complementary metal-oxide-semiconductor (CMOS) compatible optical waveguide technology. The measurements show a wideband, continuous beamsteering operation over a steering angle of 23.5 degrees and an instantaneous bandwidth of 500 MHz limited only by the measurement setup.

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Section: Introductionmentioning

confidence: 99%

System integration and radiation pattern measurements of a phased array antenna employing an integrated photonic beamformer for radio astronomy applications

et al. 2012

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“…The two main functions of optical harness in SMOS were the distribution of reference clock and the transmission of the IQ data signals. However, a good improvement would be to reduce the extensive use of coaxial cable required to distribute LO and CAS signals, as well as to distribute the signal from a central LO to all the receivers in order to avoid frequent LO phase calibration 3,4 . − The Optical Network: the harness connecting the two modules above, implementing the uplink and downlink of the optical signals as required.…”

Section: Principle Of Operation and Architecture Of Smos-opsmentioning

confidence: 99%

Optical harness and receiver for future L-band radiometer

Mengual¹,

Villalba²,

Piqueras³

et al. 2021

International Conference on Space Optics — ICSO 2020

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ESA's Soil Moisture and Ocean Salinity (SMOS) mission was launched 2 Nov 2009 being the first ESA satellite relying on a complete optical harness (OHA), which was initially selected for the mechanical properties of optical fiber, what facilitated the deployment of the 3 arms of the instrument. In addition, other interesting advantages of the optical harness played an important role in the instrument performance such as lower propagation losses, immunity to electromagnetic interference, high bandwidth, SWaP reduction, etc. The two main functions of optical harness in SMOS were the distribution of reference clock and the transmission of the IQ data signals.Based on the good results obtained by SMOS-OPS mission, under the ESA ITI contracts No 4000120740/17/NL/AI and 4000122980/18/NL/IA, DAS Photonics, along with Airbus DS, and SENER Aeroespacial have developed the required OHA and the advanced L-band receivers (ALR), respectively, for a future advanced L-band radiometer mission with a target requirement of 10 km spatial resolution.In particular, two OHA configurations have been manufactured and tested. The first configuration aims at solving some identified issues as well as at improving performance of SMOS thanks to lessons learnt from the in-orbit operation, but without attempting novel techniques of calibration or signal distribution. The main goals of the second configuration, based on WDM techniques, are the improvement of the electrical performance and the optimization of the optical harness in terms of layout, i.e, to reduce number of cables/fibres, size, weight, as well as power consumption.

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“…Optical fibers were used in this case mainly to avoid interferences on the Earth observatory instruments that analyze the Earth's natural microwave emissions [5,96], since optical fibers are not susceptible to electromagnetic interference, although their lower mass and higher mechanical flexibility were also critical advantages. ESA's SMOS mission was the first mission to rely completely on an optical harness [97], which overall comprised 74 solid state lasers (1310 nm single-mode fibre coupled Fabry-Perot laser diode with a nominal output power of 1.5 mW), 168 optical receiver diodes, and approximately 800 m of optical fiber cable.…”

Section: Space-spacementioning

confidence: 99%

Laser Technology in Photonic Applications for Space

Guilhot

Ribes-Pleguezuelo

2019

Instruments

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The registered history of laser technologies for space application starts with the first laser echoes reflected off the Moon in 1962. Since then, photonic technologies have become very prominent in most technical development. Their presence has also dramatically increased in space applications thanks to the many advantages they present over traditional equivalent devices, such as the immunity against electromagnetic interference, as well as their efficiency and low power consumption. Lasers are one of the key components in most of those applications. In this review, we present an overview of the main technologies involving lasers that are currently deployed in space, before reviewing the requirements for lasers to be reliable in that environment before discussing the advantages and drawbacks of replacing standard technologies by newly developed photonic laser-based devices.

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Optical distribution of microwave signals for Earth Observation satellites

Cited by 10 publications

References 4 publications

System integration and radiation pattern measurements of a phased array antenna employing an integrated photonic beamformer for radio astronomy applications

System integration and radiation pattern measurements of a phased array antenna employing an integrated photonic beamformer for radio astronomy applications

Optical harness and receiver for future L-band radiometer

Laser Technology in Photonic Applications for Space

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