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2017 Conference on Microwave Techniques (COMITE)最新文献

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Visible light communication beacon system for internet of things 物联网可见光通信信标系统
2017 Conference on Microwave Techniques (COMITE) Pub Date : 2017-04-20 DOI: 10.1109/COMITE.2017.7932304
Marek Novák, O. Wilfert, Tomas Simicek
{"title":"Visible light communication beacon system for internet of things","authors":"Marek Novák, O. Wilfert, Tomas Simicek","doi":"10.1109/COMITE.2017.7932304","DOIUrl":"https://doi.org/10.1109/COMITE.2017.7932304","url":null,"abstract":"The article describes an application of VLC (Visible Light Communication) for IoT (Internet of Things) nodes authentication and metadata exchange in the field of augmented reality. A practical use-case of presented communication system is provided and benefits of using such technique are explained. A smartphone camera based platform and advanced image processing is used for data reception and as a proof of concept implementation of presented communication technique. The future direction of the research is provided.","PeriodicalId":423206,"journal":{"name":"2017 Conference on Microwave Techniques (COMITE)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133470011","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: 9
Retroreflective optical communication 反向反射光通信
2017 Conference on Microwave Techniques (COMITE) Pub Date : 2017-04-20 DOI: 10.1109/COMITE.2017.7932360
Lukas Janik, Marek Novák, Ales Dobesch, L. Hudcová
{"title":"Retroreflective optical communication","authors":"Lukas Janik, Marek Novák, Ales Dobesch, L. Hudcová","doi":"10.1109/COMITE.2017.7932360","DOIUrl":"https://doi.org/10.1109/COMITE.2017.7932360","url":null,"abstract":"This article deals with visible light communication (VLC) based on retroreflective principle. Visible light communication presents great potential in terms of possible communication bandwidth, transmittter localization, spectral, power and spatial effectivity and more. In the article, the retroreflective communication itself is introduced and compared to common VLC and RFID systems. Essential parts of power balance are mentioned and discussed. The last part of the article discusses benefits of retroreflective communication for Internet of Things.","PeriodicalId":423206,"journal":{"name":"2017 Conference on Microwave Techniques (COMITE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129541197","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
Random gaussian rough surfaces for full-wave electromagnetic simulations 全波电磁模拟的随机高斯粗糙表面
2017 Conference on Microwave Techniques (COMITE) Pub Date : 2017-04-20 DOI: 10.1109/COMITE.2017.7932310
M. Mrnka
{"title":"Random gaussian rough surfaces for full-wave electromagnetic simulations","authors":"M. Mrnka","doi":"10.1109/COMITE.2017.7932310","DOIUrl":"https://doi.org/10.1109/COMITE.2017.7932310","url":null,"abstract":"In the paper, we present a straightforward procedure to utilize random rough surfaces with Gaussian probability distribution in commercial full-wave electromagnetic simulation software CST Microwave Studio. Random, two dimensional (2D) matrices with desired size and statistical parameters such as correlation length and root mean square height of the profile are generated in MATLAB®. In order to obtain desired surface parameters, we employ a Gaussian random 2D matrix generator and subsequent filtering with Gaussian 2D filter. A macro in Visual Basic for Application is then developed to convert these matrices into continuous surfaces in CST MWS. Radiation patterns of horizontally and vertically polarized half-wave dipoles are finally evaluated above these surfaces and compared to analytical models.","PeriodicalId":423206,"journal":{"name":"2017 Conference on Microwave Techniques (COMITE)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128286310","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: 7
16-Port power combiner 16端口电源合并器
2017 Conference on Microwave Techniques (COMITE) Pub Date : 2017-04-20 DOI: 10.1109/COMITE.2017.7932359
V. Závodný, Marek Dvorsky
{"title":"16-Port power combiner","authors":"V. Závodný, Marek Dvorsky","doi":"10.1109/COMITE.2017.7932359","DOIUrl":"https://doi.org/10.1109/COMITE.2017.7932359","url":null,"abstract":"The paper deals with axially symmetric power combiners, such as radial line and conical line combiners, that are very effective in combining the output signals from a large number of power amplifiers over a wide band with low losses.","PeriodicalId":423206,"journal":{"name":"2017 Conference on Microwave Techniques (COMITE)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132868256","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: 2
Prediction of atmospheric turbulence on the basis of weather conditions 根据天气情况预测大气湍流
2017 Conference on Microwave Techniques (COMITE) Pub Date : 2017-04-20 DOI: 10.1109/COMITE.2017.7932305
L. Hudcová, O. Wilfert
{"title":"Prediction of atmospheric turbulence on the basis of weather conditions","authors":"L. Hudcová, O. Wilfert","doi":"10.1109/COMITE.2017.7932305","DOIUrl":"https://doi.org/10.1109/COMITE.2017.7932305","url":null,"abstract":"The goal of the paper is in calulation of refractive index structure parameter from weather condition in selected area. Sadot - Kopeika model was chosen for determination of atmospheric turbulence during the whole day. Information about temperature, relative humidity, wind speed, time of sunrise and sunset is necessary for calculations in case of usage of the model. The main advantage of Sadot - Kopeika model is in possibility of prediction of refractive index structure parameter. We need meteorological data, so we compared the predictions for one and two days in advance from three online meteorological services. After that we have compared predicted data with data from meteorological station. Our work on the paper rely on the refractive index structure parameter prediction and comparison with calculated values from meteorological stations.","PeriodicalId":423206,"journal":{"name":"2017 Conference on Microwave Techniques (COMITE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133096535","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
Broadband 3 x 3 butler matrix 宽带3 × 3管家矩阵
2017 Conference on Microwave Techniques (COMITE) Pub Date : 2017-04-20 DOI: 10.1109/COMITE.2017.7932299
Szczepan Odrobina, K. Staszek, K. Wincza, S. Gruszczynski
{"title":"Broadband 3 x 3 butler matrix","authors":"Szczepan Odrobina, K. Staszek, K. Wincza, S. Gruszczynski","doi":"10.1109/COMITE.2017.7932299","DOIUrl":"https://doi.org/10.1109/COMITE.2017.7932299","url":null,"abstract":"In this paper, a novel design of a broadband 3 x 3 Butler matrix is proposed. It is composed of three single-section coupled-line directional couplers and two Schiffman phase shifters and operates in the frequency range 2.5 GHz – 3.5 GHz. The fabricated 3 x 3 Butler matrix features very good frequency response in terms of transmission imbalance, isolation and impedance match.","PeriodicalId":423206,"journal":{"name":"2017 Conference on Microwave Techniques (COMITE)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122344143","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: 9
Experiences with special Ka- and Q-band receivers for alphasat signal monitoring in prague, CZ 在捷克布拉格使用特殊的Ka和q波段接收机进行相位信号监测的经验
2017 Conference on Microwave Techniques (COMITE) Pub Date : 2017-04-01 DOI: 10.1109/COMITE.2017.7932355
O. Fiser, V. Pek, V. Brazda, V. Schejbal
{"title":"Experiences with special Ka- and Q-band receivers for alphasat signal monitoring in prague, CZ","authors":"O. Fiser, V. Pek, V. Brazda, V. Schejbal","doi":"10.1109/COMITE.2017.7932355","DOIUrl":"https://doi.org/10.1109/COMITE.2017.7932355","url":null,"abstract":"This paper describes special Ka- and Q-band receiver for the Alphasat signal developed for the Institute of Atmospheric Physics (IAP) Prague and first operational experiences with it. The signal level monitoring enables us to derive the atmospheric attenuation which is object of our research (its statistics and relation to relevant meteorological parameters like rain, liquid water content (LWC) and water vapor density. The LNB is located in the focus of 1.8 m parabolic offset antenna and signal is twice converted down. The resolution is 0.5 dB and sampling rate 20 Hz. Signal record is burdened by satellite space motion. Therefore a new detector was added later to enable the autonomous antenna tracking in elevation and the daily peak to peak variation due to satellite motion was significantly reduced. Recently merged splitter on second IF 1.7 GHz provides signal for 39 GHz radiometer. Examples of recorded signal with and without atmospheric attenuation are added. The satellite frequency changes are discussed, too.","PeriodicalId":423206,"journal":{"name":"2017 Conference on Microwave Techniques (COMITE)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125378595","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
Modal decomposition for arbitrary dipole array 任意偶极子阵列的模态分解
2017 Conference on Microwave Techniques (COMITE) Pub Date : 2017-04-01 DOI: 10.1109/COMITE.2017.7932302
T. Lonský, P. Hazdra, J. Kracek
{"title":"Modal decomposition for arbitrary dipole array","authors":"T. Lonský, P. Hazdra, J. Kracek","doi":"10.1109/COMITE.2017.7932302","DOIUrl":"https://doi.org/10.1109/COMITE.2017.7932302","url":null,"abstract":"The Characterlstic Mode Analysis (CMA) provides a set of eigenvalues and eigenvectors that are determined entirely by the antenna array structure at a particular frequency. The presented method solely relies on the mutual impedance matri:s: of elements of the array. In turn, the proposed approach is yery fast. Various modal decompositions are performed on an array of parallel dipoles placed horizontally above an infinite electric ground plane. The dipoles have prescribed sinusoidal currents. The results are validated by a full-wave simulator FEKO, showing good agreement.","PeriodicalId":423206,"journal":{"name":"2017 Conference on Microwave Techniques (COMITE)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128734976","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
On real time VLC channel emulators 实时VLC通道模拟器
2017 Conference on Microwave Techniques (COMITE) Pub Date : 2017-04-01 DOI: 10.1109/COMITE.2017.7932307
Ales Dobesch, Marek Novák, Lukas Janik, O. Wilfert, L. N. Alves, Carlos Ribeiro
{"title":"On real time VLC channel emulators","authors":"Ales Dobesch, Marek Novák, Lukas Janik, O. Wilfert, L. N. Alves, Carlos Ribeiro","doi":"10.1109/COMITE.2017.7932307","DOIUrl":"https://doi.org/10.1109/COMITE.2017.7932307","url":null,"abstract":"This extended abstract proposes an FPGA-based concept for real time channel emulation (CE) adapted for visible light communication (VLC) applications. Crucial insights into the optical channel modeling techniques as well as the important blocks of CE are described. Furthermore, the paper details the CE operation principle enhanced with the necessary mathematical background. Finally, the paper outlines a hardware implementation.","PeriodicalId":423206,"journal":{"name":"2017 Conference on Microwave Techniques (COMITE)","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114411269","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
Textile linear polarization reconfigurable ring slot antenna for 5.8 GHz band 用于5.8 GHz频段的纺织线极化可重构环形槽天线
2017 Conference on Microwave Techniques (COMITE) Pub Date : 2017-04-01 DOI: 10.1109/COMITE.2017.7932311
P. Vasina, J. Lacik
{"title":"Textile linear polarization reconfigurable ring slot antenna for 5.8 GHz band","authors":"P. Vasina, J. Lacik","doi":"10.1109/COMITE.2017.7932311","DOIUrl":"https://doi.org/10.1109/COMITE.2017.7932311","url":null,"abstract":"In this paper, a textile linear polarization reconfigurable antenna for 5.8 GHz band is proposed. It radiates linearly polarized wave which can be controlled in the range of angles ± 30° with respect to the longitudinal axis of the antenna with maximum radiation in the perpendicular direction to the antenna plane. Measured results prove that the proposed antenna achieves at least impedance bandwidth of 11.2 % (angle 0°) for the reflection coefficient less than -10 dB and according simulation achieved the simulated gain between 6.5–7.5 dBi in the perpendicular direction to the antenna plane.","PeriodicalId":423206,"journal":{"name":"2017 Conference on Microwave Techniques (COMITE)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123843043","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: 6
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