Pub Date : 2014-11-16DOI: 10.1109/CAMA.2014.7003412
C. Eyraud, A. Hérique, J. Geffrin, Wlodek Kofman
The main goal of CONSERT experiment is to reach information on the nucleus of the comet Churyumov-Gerasimenko/67P. In this contribution, we focus on microwave tomography and the study is conducted on an equivalent scaled model of the comet. A simple vectorial-induced current reconstruction algorithm is exploited to obtain qualitative maps of the scene. Imaging results of this test model have been performed from lab measurements.
{"title":"Imaging of a scaled comet model from lab experiments","authors":"C. Eyraud, A. Hérique, J. Geffrin, Wlodek Kofman","doi":"10.1109/CAMA.2014.7003412","DOIUrl":"https://doi.org/10.1109/CAMA.2014.7003412","url":null,"abstract":"The main goal of CONSERT experiment is to reach information on the nucleus of the comet Churyumov-Gerasimenko/67P. In this contribution, we focus on microwave tomography and the study is conducted on an equivalent scaled model of the comet. A simple vectorial-induced current reconstruction algorithm is exploited to obtain qualitative maps of the scene. Imaging results of this test model have been performed from lab measurements.","PeriodicalId":409536,"journal":{"name":"2014 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114763184","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 : 2014-11-16DOI: 10.1109/CAMA.2014.7003363
B. Le Lepvrier, R. Loison, R. Gillard, L. Patier, C. Laporte, P. Pouliguen, P. Potier
The paper first discusses the numerical capabilities of the DG-FDTD method. An analytical formulation is proposed to assess the size of the largest possible computational volume. Then, a recently proposed hybrid method, called DG-FDTD/IPO, which extends the DG-FDTD application is presented. Its capability to deal with antenna-on-platform problems is demonstrated for a canonical scenario scenario.
{"title":"Analysis of surrounded antennas: From DG-FDTD to DG-FDTD/IPO","authors":"B. Le Lepvrier, R. Loison, R. Gillard, L. Patier, C. Laporte, P. Pouliguen, P. Potier","doi":"10.1109/CAMA.2014.7003363","DOIUrl":"https://doi.org/10.1109/CAMA.2014.7003363","url":null,"abstract":"The paper first discusses the numerical capabilities of the DG-FDTD method. An analytical formulation is proposed to assess the size of the largest possible computational volume. Then, a recently proposed hybrid method, called DG-FDTD/IPO, which extends the DG-FDTD application is presented. Its capability to deal with antenna-on-platform problems is demonstrated for a canonical scenario scenario.","PeriodicalId":409536,"journal":{"name":"2014 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115906871","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 : 2014-11-16DOI: 10.1109/CAMA.2014.7003384
A. Alwakil, G. Soriano, K. Belkebir, H. Giovannini, S. Arhab
A direct inversion method and two iterative schemes based on a numerical solution of the rigorous forward surface scattering problem are tested and compared for the profilometry of a very rough metallic surface in a context of sparse data.
{"title":"Direct and iterative inverse wave scattering methods for time-harmonic far-field profilometry","authors":"A. Alwakil, G. Soriano, K. Belkebir, H. Giovannini, S. Arhab","doi":"10.1109/CAMA.2014.7003384","DOIUrl":"https://doi.org/10.1109/CAMA.2014.7003384","url":null,"abstract":"A direct inversion method and two iterative schemes based on a numerical solution of the rigorous forward surface scattering problem are tested and compared for the profilometry of a very rough metallic surface in a context of sparse data.","PeriodicalId":409536,"journal":{"name":"2014 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"40 22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128473711","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 : 2014-11-16DOI: 10.1109/CAMA.2014.7003380
H. Kaouach, A. Kabashi
A new type of unit cell featuring wideband low loss characteristics is proposed for transmit-arrays (TA) and frequency selective surfaces (FSS) in Quasi-Optical applications. The TA is realized as a non-uniform array of antenna-resonator-antenna (ARA) elements and the FSS is realized as a uniform array of ARA elements. Each ARA element is a three layer structure consisting of two patch antennas and a slot resonator. The ARA elementary cell is designed and verified using finite element method simulation. A free space Gaussian optics measurement system (GOMS) is utilized to characterize the elementary cell. The measurement results show a 20.7% -3dB (12.2% -10dB) bandwidth and a maximum in-band insertion loss of <;0.2 dB for 42 GHz.
{"title":"Using Gaussian optics measurement system to characterize a new wideband low-loss antenna-slot-antenna","authors":"H. Kaouach, A. Kabashi","doi":"10.1109/CAMA.2014.7003380","DOIUrl":"https://doi.org/10.1109/CAMA.2014.7003380","url":null,"abstract":"A new type of unit cell featuring wideband low loss characteristics is proposed for transmit-arrays (TA) and frequency selective surfaces (FSS) in Quasi-Optical applications. The TA is realized as a non-uniform array of antenna-resonator-antenna (ARA) elements and the FSS is realized as a uniform array of ARA elements. Each ARA element is a three layer structure consisting of two patch antennas and a slot resonator. The ARA elementary cell is designed and verified using finite element method simulation. A free space Gaussian optics measurement system (GOMS) is utilized to characterize the elementary cell. The measurement results show a 20.7% -3dB (12.2% -10dB) bandwidth and a maximum in-band insertion loss of <;0.2 dB for 42 GHz.","PeriodicalId":409536,"journal":{"name":"2014 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123358705","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 : 2014-11-16DOI: 10.1109/CAMA.2014.7003387
L. Le Coq, B. Fuchs, T. Kozan, Tyrone Andersson, S. Burgos
A Compact Antenna Test Range (CATR) has been implemented in the millimeter wave antenna test facility of the Institute of Electronic and Telecommunications of Rennes in order to improve its measurements capabilities. This paper describes the main lines of this project, from the technical requirements to the verification of the CATR capabilities. Measurements of the Quiet Zone (QZ) in V-band are presented to show the performance of this equipment.
{"title":"Compact antenna test range implementation in IETR millimetre wave antenna test facility","authors":"L. Le Coq, B. Fuchs, T. Kozan, Tyrone Andersson, S. Burgos","doi":"10.1109/CAMA.2014.7003387","DOIUrl":"https://doi.org/10.1109/CAMA.2014.7003387","url":null,"abstract":"A Compact Antenna Test Range (CATR) has been implemented in the millimeter wave antenna test facility of the Institute of Electronic and Telecommunications of Rennes in order to improve its measurements capabilities. This paper describes the main lines of this project, from the technical requirements to the verification of the CATR capabilities. Measurements of the Quiet Zone (QZ) in V-band are presented to show the performance of this equipment.","PeriodicalId":409536,"journal":{"name":"2014 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"835 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116423277","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 : 2014-11-16DOI: 10.1109/CAMA.2014.7003410
C. Eyraud, J. Geffrin
In this paper, our particular focus is on the uncertainties impact on scattered field measurements. These uncertainties can be due to a non perfect knowledge on the object parameters or to the measurement procedure itself. The influence of these uncertainties is of great importance when one want to perform comparisons between EM experimental fields and simulated fields.
{"title":"Influence of the uncertainties on the scattering problems","authors":"C. Eyraud, J. Geffrin","doi":"10.1109/CAMA.2014.7003410","DOIUrl":"https://doi.org/10.1109/CAMA.2014.7003410","url":null,"abstract":"In this paper, our particular focus is on the uncertainties impact on scattered field measurements. These uncertainties can be due to a non perfect knowledge on the object parameters or to the measurement procedure itself. The influence of these uncertainties is of great importance when one want to perform comparisons between EM experimental fields and simulated fields.","PeriodicalId":409536,"journal":{"name":"2014 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114084523","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 : 2014-11-16DOI: 10.1109/CAMA.2014.7003327
A. Nicolet, G. Demésy, F. Zolla, B. Vial
In the present paper, we show that it is possible to use a periodic structure of disconnected elements (e.g. a line of rods) to guide electromagnetic waves, in the direction of the periodicity. To study such segmented waveguides, we use the concept of quasimodes associated to complex frequencies. The numerical determination of quasimodes is based on a finite element formulation completed with Perfectly Matched Layers (PMLs). These PMLs lead to non Hermitian matrices whose complex eigenvalues correspond to quasimode frequencies. Using Floquet-Bloch theory, a numerical model is set up that allows the spectral study of structures that are both open and periodic. With this model, we show that it is possible to guide electromagnetic waves on significant distances with very limited losses.
{"title":"Quasi-modal analysis of segmented waveguides","authors":"A. Nicolet, G. Demésy, F. Zolla, B. Vial","doi":"10.1109/CAMA.2014.7003327","DOIUrl":"https://doi.org/10.1109/CAMA.2014.7003327","url":null,"abstract":"In the present paper, we show that it is possible to use a periodic structure of disconnected elements (e.g. a line of rods) to guide electromagnetic waves, in the direction of the periodicity. To study such segmented waveguides, we use the concept of quasimodes associated to complex frequencies. The numerical determination of quasimodes is based on a finite element formulation completed with Perfectly Matched Layers (PMLs). These PMLs lead to non Hermitian matrices whose complex eigenvalues correspond to quasimode frequencies. Using Floquet-Bloch theory, a numerical model is set up that allows the spectral study of structures that are both open and periodic. With this model, we show that it is possible to guide electromagnetic waves on significant distances with very limited losses.","PeriodicalId":409536,"journal":{"name":"2014 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114622688","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 : 2014-11-16DOI: 10.1109/CAMA.2014.7003342
C. Geuzaine, B. Thierry, N. Marsic, D. Colignon, A. Vion, Simon Tournier, Y. Boubendir, M. E. Bouajaji, Xavier Antoine, ‡. M.ElBouajaji
We present a flexible finite element solver for testing optimized Schwarz domain decomposition techniques for the time-harmonic Maxwell equations. After a review of non-overlapping Schwarz domain decomposition methods and associated transmission conditions, we discuss the implementation, based on the open source software GetDP and Gmsh. The solver, along with ready-to-use examples, is available online for further testing.
{"title":"An open source domain decomposition solver for time-harmonic electromagnetic wave problems","authors":"C. Geuzaine, B. Thierry, N. Marsic, D. Colignon, A. Vion, Simon Tournier, Y. Boubendir, M. E. Bouajaji, Xavier Antoine, ‡. M.ElBouajaji","doi":"10.1109/CAMA.2014.7003342","DOIUrl":"https://doi.org/10.1109/CAMA.2014.7003342","url":null,"abstract":"We present a flexible finite element solver for testing optimized Schwarz domain decomposition techniques for the time-harmonic Maxwell equations. After a review of non-overlapping Schwarz domain decomposition methods and associated transmission conditions, we discuss the implementation, based on the open source software GetDP and Gmsh. The solver, along with ready-to-use examples, is available online for further testing.","PeriodicalId":409536,"journal":{"name":"2014 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130412439","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 : 2014-11-12DOI: 10.1109/CAMA.2014.7003382
F. Fezai, J. Sence, S. Bila, F. Torrès, T. Monediere, B. Jarry, B. Frigui, R. Chantalat, F. Seyfert, M. Olivi, P. Pouliguen, P. Potier
This paper presents the structuration and the first results of a research program dedicated to the co-design and the co-integration of a multiband antenna array for a GPS/Galileo receiver. The objective is to develop a novel design approach taking into account all parts of the RF system simultaneously. By this way, the aim is to improve the performances of the RF front-end compared to a traditional approach where RF circuits would be designed separately.
{"title":"Co-design and co-integration of multiband active antenna arrays for satellite radionavigation systems","authors":"F. Fezai, J. Sence, S. Bila, F. Torrès, T. Monediere, B. Jarry, B. Frigui, R. Chantalat, F. Seyfert, M. Olivi, P. Pouliguen, P. Potier","doi":"10.1109/CAMA.2014.7003382","DOIUrl":"https://doi.org/10.1109/CAMA.2014.7003382","url":null,"abstract":"This paper presents the structuration and the first results of a research program dedicated to the co-design and the co-integration of a multiband antenna array for a GPS/Galileo receiver. The objective is to develop a novel design approach taking into account all parts of the RF system simultaneously. By this way, the aim is to improve the performances of the RF front-end compared to a traditional approach where RF circuits would be designed separately.","PeriodicalId":409536,"journal":{"name":"2014 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115615164","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 : 2014-11-01DOI: 10.1109/CAMA.2014.7003437
F. Viani, F. Robol, E. Giarola, A. Polo, A. Massa, A. Toscano
Monitoring systems designed for museum scenarios are nowadays largely employed in order to monitor environmental parameters for artworks conservation and to control exhibitions in order to prevent and avoid critical events (e.g., theft, damages). The use of wireless sensor network technology allows the non-invasive integration of such monitoring functionalities in a great variety of complex museum scenarios, often hosted in historic buildings. The proposed system addresses the problem of monitoring multiple physical parameters of interest for museum curators, exploiting the advantages of a flexible, cooperative, and pervasive WSN architecture.
{"title":"Wireless monitoring of heterogeneous parameters in complex museum scenario","authors":"F. Viani, F. Robol, E. Giarola, A. Polo, A. Massa, A. Toscano","doi":"10.1109/CAMA.2014.7003437","DOIUrl":"https://doi.org/10.1109/CAMA.2014.7003437","url":null,"abstract":"Monitoring systems designed for museum scenarios are nowadays largely employed in order to monitor environmental parameters for artworks conservation and to control exhibitions in order to prevent and avoid critical events (e.g., theft, damages). The use of wireless sensor network technology allows the non-invasive integration of such monitoring functionalities in a great variety of complex museum scenarios, often hosted in historic buildings. The proposed system addresses the problem of monitoring multiple physical parameters of interest for museum curators, exploiting the advantages of a flexible, cooperative, and pervasive WSN architecture.","PeriodicalId":409536,"journal":{"name":"2014 IEEE Conference on Antenna Measurements & Applications (CAMA)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115657347","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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