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2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)最新文献

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Practical “Low Cost” LEO Receiving Ground Station 实用的“低成本”LEO接收地面站
2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO) Pub Date : 2018-10-01 DOI: 10.23919/radio.2018.8572330
Faraaz Shamutally, Ziyaad Soreefan, Arjoon Suddhoo, Jean Marc Momplé
{"title":"Practical “Low Cost” LEO Receiving Ground Station","authors":"Faraaz Shamutally, Ziyaad Soreefan, Arjoon Suddhoo, Jean Marc Momplé","doi":"10.23919/radio.2018.8572330","DOIUrl":"https://doi.org/10.23919/radio.2018.8572330","url":null,"abstract":"This short paper describes a practical approach to build a low cost “home brew” Low Earth Orbit (LEO) satellite ground station for receiving telemetry as well as pictures from weather satellites and CubeSats. The setup will enable students and radio enthusiasts to get acquainted with LEO satellites and space technology, telemetry decoding and also receive directly METEO pictures at low cost. The proposed antennas have been built locally (see photos below) and the proposed setup fully tested in January 2018 and presented in various Radio Amateurs workshops.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131405161","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}
引用次数: 0
A Linear Voltage Controlled Quadrature Oscillator 一种线性压控正交振荡器
2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO) Pub Date : 2018-10-01 DOI: 10.23919/RADIO.2018.8572406
R. Nandi, P. Venkateswaran, S. Pattanayak, K. Mathur
{"title":"A Linear Voltage Controlled Quadrature Oscillator","authors":"R. Nandi, P. Venkateswaran, S. Pattanayak, K. Mathur","doi":"10.23919/RADIO.2018.8572406","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572406","url":null,"abstract":"A linear voltage controlled quadrature oscillator (LVCQO) is presented; the design uses commercially available IC modules. The response had been experimentally verified with simulation and hardware test. The realization is based on an electronically tunable allpass filter (ETAF) coupled with a voltage controlled integrator (VCI). Quadrature oscillator tuning frequecy is measured in a range of $mathbf{1}leq pmb{f}_{o} < (mathbf{MHz})leq mathbf{10}$ with satisfactory phase-noise response of −96 dBc/Hz. Effects of device parasitic are negligible.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134480412","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}
引用次数: 0
MRI of Flow and the Lagrangian Description 流核磁共振成像与拉格朗日描述
2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO) Pub Date : 2018-10-01 DOI: 10.23919/RADIO.2018.8572459
Sara K. Vesely, S. Dolci, C. Dolci
{"title":"MRI of Flow and the Lagrangian Description","authors":"Sara K. Vesely, S. Dolci, C. Dolci","doi":"10.23919/RADIO.2018.8572459","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572459","url":null,"abstract":"There is much interest in functional magnetic resonance (fMRI) localization of cognitive processes. Their dependency on hemodynamics is among the issues concerning the experimental protocol and data analysis. Thus, assessment of flow effects on the images obtained by commercial instruments is useful. We show by some examples on water carrying vessels that their orientation under continuous flow conditions may be wrongly reconstructed in spin-echo images.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128436168","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}
引用次数: 0
A Cross-Coupled E-Band VCO with on-chip SIW Resonator in 130nm SiGe BiCMOS 一种带片上SIW谐振器的130纳米SiGe BiCMOS交叉耦合e波段压控振荡器
2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO) Pub Date : 2018-10-01 DOI: 10.23919/RADIO.2018.8572477
Dewald Sieberhagen, H. Nel, T. Stander
{"title":"A Cross-Coupled E-Band VCO with on-chip SIW Resonator in 130nm SiGe BiCMOS","authors":"Dewald Sieberhagen, H. Nel, T. Stander","doi":"10.23919/RADIO.2018.8572477","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572477","url":null,"abstract":"We investigate the use of an SIW cavity on-chip with varactor tuning as a resonant tank for a cross-coupled VCO in 130nm SiGe BiCMOS. Unloaded Q-factors of 31.7 to 214 over the tuning range are obtained. The VCO's frequency tuning range is simulated to be 81.4 – 82.2 GHz, with an average phase noise of −79 dBc/Hz at 1 MHz offset. It is found that the long feed lines to the cavity negate the possible improvement in phase noise gained from the high $mathbf{Q}_{0}$ cavity.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124154146","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}
引用次数: 4
Optimal Antenna Position Inside Evaporation Duct 天线在蒸发管道内的最佳位置
2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO) Pub Date : 2018-10-01 DOI: 10.23919/RADIO.2018.8572344
D. Serebriakov, R. Abdullin
{"title":"Optimal Antenna Position Inside Evaporation Duct","authors":"D. Serebriakov, R. Abdullin","doi":"10.23919/RADIO.2018.8572344","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572344","url":null,"abstract":"This paper is devoted to the investigation of an evaporation duct in the context of its impact on microwave links communication stability. The work contains the numerical results for previously developed mathematical model based on using the method of dyadic Green's functions. The electric field intensity dependencies on the receiving antenna suspension height and height of evaporation duct have been obtained. These results make it possible to formulate recommendations on how to place the transceiver antennas of microwave links to ensure 24-hour radio communication stability.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126817182","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}
引用次数: 1
[Copyright notice] (版权)
2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO) Pub Date : 2018-10-01 DOI: 10.23919/radio.2018.8572484
{"title":"[Copyright notice]","authors":"","doi":"10.23919/radio.2018.8572484","DOIUrl":"https://doi.org/10.23919/radio.2018.8572484","url":null,"abstract":"","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133950489","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}
引用次数: 1
A Dual-Band Antenna with AMC Reflector for WLAN Applications 一种用于WLAN应用的带AMC反射器的双频天线
2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO) Pub Date : 2018-10-01 DOI: 10.23919/RADIO.2018.8572391
E. W. Coetzee, J. Odendaal, J. Joubert
{"title":"A Dual-Band Antenna with AMC Reflector for WLAN Applications","authors":"E. W. Coetzee, J. Odendaal, J. Joubert","doi":"10.23919/RADIO.2018.8572391","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572391","url":null,"abstract":"We present the design of a dual-band slot antenna with high gain for wireless local area network (WLAN) covering the IEEE802.11a/b and IEEE802.116d/e standards. The antenna consists of a feed line with a complementary strip-slot pair and a parasitic slot-element and has a size of $57times 40 mm^{2}$. The antenna is combined with a single-band artificial magnetic conductor (AMC) surface to achieve a unidirectional radiation pattern with an average gain of 9.6 dBi. The size of the antenna with the AMC reflector is $68times 53 mm^{2}$. The proposed antenna was designed and simulated. The simulation results show that the antenna operates from 2.39 – 2.50 GHz and 4.90 – 5.97 GHz, which covers the 2.4, 5.2 and 5.8 GHz WLAN bands. It has a directional radiation pattern with peak gains of 7.5, 10.3 and 10.9 dBi at 2.4, 5.2 and 5.8 GHz, respectively.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121248731","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}
引用次数: 0
5.11:1 Bandwidth Dual Polarized Dipole Antenna
2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO) Pub Date : 2018-10-01 DOI: 10.23919/RADIO.2018.8572299
A. Gevorkyan, Y. Yukhanov
{"title":"5.11:1 Bandwidth Dual Polarized Dipole Antenna","authors":"A. Gevorkyan, Y. Yukhanov","doi":"10.23919/RADIO.2018.8572299","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572299","url":null,"abstract":"In this paper it is shown the developed dual polarized dipole antenna. The antenna has a working frequency band at the level of $mathbf{VSWR} <3$ in the frequency range 1.75-8.94 GHz (5.11:1 bandwidth). The realized gain in the operating frequency band is in the range from −20.2 to −5.3 dB.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126046994","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}
引用次数: 0
Theoretical Study of a High Permittivity Dielectric Resonator as a Potential NMR Probe 高介电常数介质谐振器作为潜在核磁共振探针的理论研究
2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO) Pub Date : 2018-10-01 DOI: 10.23919/RADIO.2018.8572301
M. Moussu, E. Georget, R. Abdeddaim, S. Enoch, S. Glybovski
{"title":"Theoretical Study of a High Permittivity Dielectric Resonator as a Potential NMR Probe","authors":"M. Moussu, E. Georget, R. Abdeddaim, S. Enoch, S. Glybovski","doi":"10.23919/RADIO.2018.8572301","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572301","url":null,"abstract":"In this short paper, we present a theoretical study of a new probe for Nuclear Magnetic Resonance (NMR) microscopy, based on high-permittivity and low-loss ceramic resonators. The probe design consists of two coupled annular resonators, with a maximum of axial magnetic field within them. An analytical study of the first transverse electric (TE) eigenmode of a single resonator was undertaken to assess the reliability of the magnetic field distribution for NMR imaging purposes. The developed analytical model also enabled to study coupling between resonators as a tool for tuning the probe at the Larmor frequency.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126189397","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}
引用次数: 0
On the DC Power Budget and RF Performance Study of a Linearized 1 Watt Medium RF Power Amplifier for Enterprise Wireless BS Applications 用于企业无线BS应用的线性化1瓦介质射频功率放大器的直流功率预算和射频性能研究
2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO) Pub Date : 2018-10-01 DOI: 10.23919/RADIO.2018.8572425
S. Patro, A. Panda, R. K. Mishra
{"title":"On the DC Power Budget and RF Performance Study of a Linearized 1 Watt Medium RF Power Amplifier for Enterprise Wireless BS Applications","authors":"S. Patro, A. Panda, R. K. Mishra","doi":"10.23919/RADIO.2018.8572425","DOIUrl":"https://doi.org/10.23919/RADIO.2018.8572425","url":null,"abstract":"This paper presents the Direct Current (DC) power budget analysis and Radio Frequency (RF) frontend system design considerations of a medium Power Amplifier (PA) with average power output of 1watt. The PA system analysis is performed in a simulation environment for three linearization usage scenarios such as, Back-off, Digital Pre-Distortion (DPD) and Analog Pre-Distortion (APD) schemes. In the Back-off mode, the total RF frontend power consumption is 35.87 watt and with the usage of DPD topology the power consumption is 32.76 watt while with APD topology, the power consumption is 23.74 watt. The APD topology considers a Commercial off the Shelf (COTS) design topology with using moderately non-linear PA device operation. As compared to the back-off operation, the DPD scheme has got a 8.6% estimated relative power saving and the APD provides an estimated relative power saving of 33.8%.","PeriodicalId":365518,"journal":{"name":"2018 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116215209","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}
引用次数: 3
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