A new all-metal dual-frequency RHCP high gain antenna is under development at NASA’s Jet Propulsion Laboratory for a potential Europa Lander. The antenna is mainly made of metal so it could survive the harsh environment conditions of Europa (i.e. very low temperature and high radiation and ESD levels). The antenna is flat to meet drastic volume constraints and has efficiencies higher than 80% at both the uplink and downlink X-band Deep Space frequency bands. This antenna is a key component for the potential mission enabling Direct Link to Earth (DTE) without any relying on an Orbiter to relay the data.
{"title":"All-metal Dual Frequency RHCP High Gain Antenna for the Extreme Environments of a Potential Europa Lander","authors":"N. Chahat","doi":"10.1049/CP.2018.0736","DOIUrl":"https://doi.org/10.1049/CP.2018.0736","url":null,"abstract":"A new all-metal dual-frequency RHCP high gain antenna is under development at NASA’s Jet Propulsion Laboratory for a potential Europa Lander. The antenna is mainly made of metal so it could survive the harsh environment conditions of Europa (i.e. very low temperature and high radiation and ESD levels). The antenna is flat to meet drastic volume constraints and has efficiencies higher than 80% at both the uplink and downlink X-band Deep Space frequency bands. This antenna is a key component for the potential mission enabling Direct Link to Earth (DTE) without any relying on an Orbiter to relay the data.","PeriodicalId":6612,"journal":{"name":"2019 13th European Conference on Antennas and Propagation (EuCAP)","volume":"1 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82081628","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 : 2019-03-01DOI: 10.1587/TRANSCOM.2018EBP3282
Mitsuki Nakamura, M. Sasaki, W. Yamada, N. Kita, T. Onizawa, Y. Takatori, M. Nakatsugawa, M. Inomata, K. Kitao, T. Imai
In this paper, we report the performance of our propagation loss estimation model in a congested environment, and we show an estimation formula that easily derives the estimation result. We obtained propagation loss characteristics in the 4.7 GHz and 66.5 GHz bands around Kamiooka Station’s main ticket gate, which is a congested indoor environment. The RMS error of the calculation results of our propagation loss estimation formula and the measured value improved by about 1 dB on average compared with the free space loss and the RMS error of the measured value. The propagation loss estimation formula we propose can estimate propagation loss characteristics with high accuracy even indoors.
{"title":"Path Loss Model in Crowded Indoor Environments Considering Multiple Human Body Shadowing of Multipath at 4.7 GHz and 66.5 GHz","authors":"Mitsuki Nakamura, M. Sasaki, W. Yamada, N. Kita, T. Onizawa, Y. Takatori, M. Nakatsugawa, M. Inomata, K. Kitao, T. Imai","doi":"10.1587/TRANSCOM.2018EBP3282","DOIUrl":"https://doi.org/10.1587/TRANSCOM.2018EBP3282","url":null,"abstract":"In this paper, we report the performance of our propagation loss estimation model in a congested environment, and we show an estimation formula that easily derives the estimation result. We obtained propagation loss characteristics in the 4.7 GHz and 66.5 GHz bands around Kamiooka Station’s main ticket gate, which is a congested indoor environment. The RMS error of the calculation results of our propagation loss estimation formula and the measured value improved by about 1 dB on average compared with the free space loss and the RMS error of the measured value. The propagation loss estimation formula we propose can estimate propagation loss characteristics with high accuracy even indoors.","PeriodicalId":6612,"journal":{"name":"2019 13th European Conference on Antennas and Propagation (EuCAP)","volume":"9 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74557420","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 : 2019-03-01DOI: 10.24355/DBBS.084-201908301357-0
Johannes M. Eckhardt, Tobias Doeker, S. Rey, T. Kürner
In this paper a measurement campaign in a real Data Centre at 300 GHz and recent results are presented. The measurements are performed with a UWB sub-mmWave channel sounder and classified in general characterisation, top-of-rack and intra-rack measurements. The individual measurement setups as well as the methodology are explained. In a first step, the measurements are evaluated regarding the path attenuation, the power delay profile (PDP) and the power angular spectrum (PAS). The PDP as well as the PAS give comprehensible results, which are explained by the scenario’s geometry. The path attenuation shows reasonable results compared to the free space path loss and demonstrates that wireless communication at 300 GHz in a Data Centre is possible.
{"title":"Measurements in a Real Data Centre at 300 GHz and Recent Results","authors":"Johannes M. Eckhardt, Tobias Doeker, S. Rey, T. Kürner","doi":"10.24355/DBBS.084-201908301357-0","DOIUrl":"https://doi.org/10.24355/DBBS.084-201908301357-0","url":null,"abstract":"In this paper a measurement campaign in a real Data Centre at 300 GHz and recent results are presented. The measurements are performed with a UWB sub-mmWave channel sounder and classified in general characterisation, top-of-rack and intra-rack measurements. The individual measurement setups as well as the methodology are explained. In a first step, the measurements are evaluated regarding the path attenuation, the power delay profile (PDP) and the power angular spectrum (PAS). The PDP as well as the PAS give comprehensible results, which are explained by the scenario’s geometry. The path attenuation shows reasonable results compared to the free space path loss and demonstrates that wireless communication at 300 GHz in a Data Centre is possible.","PeriodicalId":6612,"journal":{"name":"2019 13th European Conference on Antennas and Propagation (EuCAP)","volume":"8 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73025858","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 : 2019-03-01DOI: 10.1017/S1759078720000197
Shuoliang Ding, S. Koulouridis, L. Pichon
In this paper, a novel miniaturized implantable circular PIFA antenna is presented. It supports both wireless information communication and wireless energy transmission at the Medical Device Radiocommunication band (MedRadio 402-405MHz) and the Industrial, Scientific and Medical bands (ISM 902.8-928 MHz). Antenna is circular to avoid sharp edges while miniaturization is achieved by adding two circular slots to the patch. Main scenario includes embedding into the muscle layer of a cylindrical three-layer model of a human arm for which several parameters are analyzed (resonance, radiation pattern and Special Absorption rate (SAR)). Power transmission efficiency and interaction distance limits to ensure connection are also evaluated.
{"title":"A Dual-Band Miniaturized Circular Antenna for Deep in Body Biomedical Wireless Applications","authors":"Shuoliang Ding, S. Koulouridis, L. Pichon","doi":"10.1017/S1759078720000197","DOIUrl":"https://doi.org/10.1017/S1759078720000197","url":null,"abstract":"In this paper, a novel miniaturized implantable circular PIFA antenna is presented. It supports both wireless information communication and wireless energy transmission at the Medical Device Radiocommunication band (MedRadio 402-405MHz) and the Industrial, Scientific and Medical bands (ISM 902.8-928 MHz). Antenna is circular to avoid sharp edges while miniaturization is achieved by adding two circular slots to the patch. Main scenario includes embedding into the muscle layer of a cylindrical three-layer model of a human arm for which several parameters are analyzed (resonance, radiation pattern and Special Absorption rate (SAR)). Power transmission efficiency and interaction distance limits to ensure connection are also evaluated.","PeriodicalId":6612,"journal":{"name":"2019 13th European Conference on Antennas and Propagation (EuCAP)","volume":"16 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85328460","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 : 2019-03-01DOI: 10.1017/S1759078720000227
V. Pascale, D. Maiarelli, L. D'Agristina, N. Gatti
Space Engineering recently developed enhanced passive components as key elements for its telecom Ku-band antenna product line, tailored to reconfigurable payloads. This paper describes the design and qualification of a dual linear polarization Ku-Band radiating chain, developed for the DRA receive (Rx) antenna embarked on the Eutelsat Quantum satellite. The feed chain covers the entire Ku-band frequency range allocated for Fixed Satellite Services (FSS) providing receive functionality and embedding sharp rejection features over the adjacent transmit band. Details of the feed chain design and an overview of RF and environmental qualification test results are presented.
{"title":"Design and Qualification of Ku-Band Radiating Chains for Receive Active Array Antenna of Flexible Telecommunication Satellites","authors":"V. Pascale, D. Maiarelli, L. D'Agristina, N. Gatti","doi":"10.1017/S1759078720000227","DOIUrl":"https://doi.org/10.1017/S1759078720000227","url":null,"abstract":"Space Engineering recently developed enhanced passive components as key elements for its telecom Ku-band antenna product line, tailored to reconfigurable payloads. This paper describes the design and qualification of a dual linear polarization Ku-Band radiating chain, developed for the DRA receive (Rx) antenna embarked on the Eutelsat Quantum satellite. The feed chain covers the entire Ku-band frequency range allocated for Fixed Satellite Services (FSS) providing receive functionality and embedding sharp rejection features over the adjacent transmit band. Details of the feed chain design and an overview of RF and environmental qualification test results are presented.","PeriodicalId":6612,"journal":{"name":"2019 13th European Conference on Antennas and Propagation (EuCAP)","volume":"5 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87071264","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 : 2019-03-01DOI: 10.1017/S1759078720000136
Fernando Rodríguez Varela, B. Galocha Iragüen, M. Sierra Castañer
Near-field to far-field transformations constitute a powerful antenna characterization technique for near-field measurement scenarios. In this paper a near-field to far-field transformation technique based on multiple spherical wave expansions is presented. Thanks to its iterative matrix inversion nature, the approach performs the transformation of fields measured on arbitrary surfaces. Also, irregular sampling schemes can be incorporated. The proposed algorithm is based on modelling the antenna fields with not one, but several spherical wave expansions distributed over its geometry. Due to the high number of spherical wave expansions, their truncation number can be arbitrarily reduced. Working with expansions of low order allows to incorporate the probe correction in the transformation in a very simple way, accepting any type of probe and orientation. Only the probe far-field pattern is used, thus working with its full spherical wave expansion is avoided. The algorithm is validated using simulated field data as well as measurements of real antennas.
{"title":"Probe-Corrected Near-Field to Far-Field Transformation Using Multiple Spherical Wave Expansions","authors":"Fernando Rodríguez Varela, B. Galocha Iragüen, M. Sierra Castañer","doi":"10.1017/S1759078720000136","DOIUrl":"https://doi.org/10.1017/S1759078720000136","url":null,"abstract":"Near-field to far-field transformations constitute a powerful antenna characterization technique for near-field measurement scenarios. In this paper a near-field to far-field transformation technique based on multiple spherical wave expansions is presented. Thanks to its iterative matrix inversion nature, the approach performs the transformation of fields measured on arbitrary surfaces. Also, irregular sampling schemes can be incorporated. The proposed algorithm is based on modelling the antenna fields with not one, but several spherical wave expansions distributed over its geometry. Due to the high number of spherical wave expansions, their truncation number can be arbitrarily reduced. Working with expansions of low order allows to incorporate the probe correction in the transformation in a very simple way, accepting any type of probe and orientation. Only the probe far-field pattern is used, thus working with its full spherical wave expansion is avoided. The algorithm is validated using simulated field data as well as measurements of real antennas.","PeriodicalId":6612,"journal":{"name":"2019 13th European Conference on Antennas and Propagation (EuCAP)","volume":"44 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81552115","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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