Evolution of Telecommunication Payloads: The Necessity of New Technologies

Gayrard, Jean-Didier

doi:10.2514/6.2002-1848

Cited by 12 publications

(4 citation statements)

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“…requency conversion technology occupies an important position in modern electrical systems, and can realize upconversion or down-conversion of microwave signals [1][2]. In radar systems, it is necessary to mix the received highfrequency echo signal with the local oscillator (LO) signal to realize frequency down-conversion at the receiver, so that lowspeed electrical devices can be used for signal post-processing.…”

Section: Introductionmentioning

confidence: 99%

Stimulated Brillouin Scattering Based Image-Reject Microwave Signal Harmonic Down-Converter

Zhai

Zhu

2022

IEEE Photonics J.

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We propose and demonstrate a photonic microwave signal harmonic down-converter with image rejection capability via stimulated Brillouin scattering (SBS). A dual-polarization dual-parallel Mach-Zehnder modulator (DP-DPMZM) is driven by a radio frequency/image (RF/IM) signal and a local oscillation (LO) signal to realize equivalent phase modulation and 4 th -order double sideband modulation respectively. The optical carriers from the two arms of the DP-DPMZM can cancel out each other after polarization combining, thereby increasing the useful optical signal power in photodetection. Since the beating notes between the IM-modulated signals and LO-modulated 4 th -order sidebands interfere destructively, the down-converted IM signals disappear naturally, which makes the down-converted image parts be suppressed in optical domain. By using an SBS-based dual-band microwave photonic filter to suppress the RF modulated -1 st -order sideband and amplify the +1 st -order sideband, destructive interference can be broken. Therefore, the RF signal over frequency range of 21-28 GHz can be down-converted to intermediate frequency (IF) band, and the image rejection ratio (IRR) can be also improved to more than 55 dB. Under -160 dBm/Hz noise floor, the SFDR is 105.1 dB•Hz 2/3 .

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Section: Introductionmentioning

confidence: 99%

Stimulated Brillouin Scattering Based Image-Reject Microwave Signal Harmonic Down-Converter

Zhai

Zhu

2022

IEEE Photonics J.

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“…Future broadband telecom satellites on geo-stationary orbit will receive and re-transmit hundreds of radiofrequency (RF) channels over tens of antenna beams; they will require flexible payloads in order to crossconnect or switch signals on demand, and outperform conventional "bent pipe" repeaters [1]. Photonic technologies may offer major benefits in the development of such payloads with broader bandwidth, wider connectivity, and enhanced routing flexibility at ever lower mass and smaller size [2].…”

Section: Introductionmentioning

confidence: 99%

Microwave photonics cross-connect repeater for telecommunication satellites

Benazet¹,

Sotom²,

Maignan³

et al. 2006

SPIE Proceedings

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“…Global reach is achieved by implementing complex multiple spotbeam coverage based on frequency reuse. Such future broadband telecom satellites will receive and re-transmit hundreds of radio-frequency (RF) channels over tens of antenna beams; they will require flexible payloads that outperform the conventional "bent pipe" repeater [1] in order to cross-connect or switch signals on demand. Due to the long lifetime of a satellite mission (15 years) compared to the fast moving telecommunication market, flexible, versatile and future-proof solutions are mandatory.…”

Section: Introductionmentioning

confidence: 99%

A flexible telecom satellite repeater based on microwave photonic technologies

Sotom¹,

Benazet²,

Maignan³

2017

International Conference on Space Optics — ICSO 2006

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Future telecom satellite based on geo-stationary Earth orbit (GEO) will require advanced payloads in Kaband so as to receive, route and re-transmit hundreds of microwave channels over multiple antenna beams. We report on the proof-of-concept demonstration of a analogue repeater making use of microwave photonic technologies for supporting broadband, transparent, and flexible cross-connectivity. It has microwave input and output sections, and features a photonic core for LO distribution, frequency down-conversion, and cross-connection of RF channels. With benefits such as transparency to RF frequency, infinite RF isolation, mass and volume savings, such a microwave photonic cross-connect would compare favourably with microwave implementations, and based on optical MEMS switches could grow up to large port counts.

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Evolution of Telecommunication Payloads: The Necessity of New Technologies

Cited by 12 publications

References 0 publications

Stimulated Brillouin Scattering Based Image-Reject Microwave Signal Harmonic Down-Converter

Stimulated Brillouin Scattering Based Image-Reject Microwave Signal Harmonic Down-Converter

Microwave photonics cross-connect repeater for telecommunication satellites

A flexible telecom satellite repeater based on microwave photonic technologies

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