Pub Date : 2024-01-21DOI: 10.1109/SHaRC59908.2024.10438501
Janis Wörmann, L. Manoliu, S. Haussmann, M. Krstic, Ingmar Kallfass
A wideband video transmission in E-band from 71 to 76 GHz dedicated to a satellite downlink is demonstrated in a laboratory setup with an analog QPSK Costas loop circuit in 130nm SiGe BiCMOS in the receiver front-end for direct demodulation. A QPSK modulated, uncompressed 4K live video with a total data rate of 6 Gbit/s is received with an EVM of −17.5 dB in real-time at low power consumption due to analog receiver synchronization and without any further synchronization in the digital domain. The Costas loop provides a sufficiently large hold-in range to cover the carrier frequency drift due to the Doppler effect from the satellite overpass and operates with a power efficiency of 940 pJ/bit for the tested video stream data rate.
{"title":"Real-time Wideband Video Synchronization via an Analog QPSK Costas Loop in a Laboratory Demonstration of an E-Band Satellite Downlink","authors":"Janis Wörmann, L. Manoliu, S. Haussmann, M. Krstic, Ingmar Kallfass","doi":"10.1109/SHaRC59908.2024.10438501","DOIUrl":"https://doi.org/10.1109/SHaRC59908.2024.10438501","url":null,"abstract":"A wideband video transmission in E-band from 71 to 76 GHz dedicated to a satellite downlink is demonstrated in a laboratory setup with an analog QPSK Costas loop circuit in 130nm SiGe BiCMOS in the receiver front-end for direct demodulation. A QPSK modulated, uncompressed 4K live video with a total data rate of 6 Gbit/s is received with an EVM of −17.5 dB in real-time at low power consumption due to analog receiver synchronization and without any further synchronization in the digital domain. The Costas loop provides a sufficiently large hold-in range to cover the carrier frequency drift due to the Doppler effect from the satellite overpass and operates with a power efficiency of 940 pJ/bit for the tested video stream data rate.","PeriodicalId":518588,"journal":{"name":"2024 IEEE Space Hardware Radio Conference (SHaRC)","volume":"9 2","pages":"23-26"},"PeriodicalIF":0.0,"publicationDate":"2024-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140531316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-21DOI: 10.1109/SHaRC59908.2024.10438598
Chengtao Xu, Jayaprakash B. Shivakumar, Eduardo Rojas
This study presents a novel design for a microlens coupler to transfer light from a straight waveguide to a single-mode fiber (SMF). Our design combines improved mode matching and enhanced alignment tolerance compared to edge coupling. An investigation of the alignment tolerance is done by assessing coupling efficiency under various degrees of manufacturing-induced misalignment. Singlet and diffractive lenses are incorporated into our design to focus the light into the fiber precisely. Comprehensive simulations demonstrate that the diffractive lens outperforms edge coupling and singlet lens in coupling efficiency. Fabrication methods such as additive manufacturing are discussed for future works. Our findings underscore the potential of innovative microlens coupler design in advancing free space optical communication (FSOC) systems.
{"title":"Microlens Coupler from Integrated Photonic Circuit to Fiber Design for Space Application","authors":"Chengtao Xu, Jayaprakash B. Shivakumar, Eduardo Rojas","doi":"10.1109/SHaRC59908.2024.10438598","DOIUrl":"https://doi.org/10.1109/SHaRC59908.2024.10438598","url":null,"abstract":"This study presents a novel design for a microlens coupler to transfer light from a straight waveguide to a single-mode fiber (SMF). Our design combines improved mode matching and enhanced alignment tolerance compared to edge coupling. An investigation of the alignment tolerance is done by assessing coupling efficiency under various degrees of manufacturing-induced misalignment. Singlet and diffractive lenses are incorporated into our design to focus the light into the fiber precisely. Comprehensive simulations demonstrate that the diffractive lens outperforms edge coupling and singlet lens in coupling efficiency. Fabrication methods such as additive manufacturing are discussed for future works. Our findings underscore the potential of innovative microlens coupler design in advancing free space optical communication (FSOC) systems.","PeriodicalId":518588,"journal":{"name":"2024 IEEE Space Hardware Radio Conference (SHaRC)","volume":"56 2","pages":"15-18"},"PeriodicalIF":0.0,"publicationDate":"2024-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140531462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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