Pub Date : 2014-04-06DOI: 10.1109/EUCAP.2014.6902297
F. Costa, S. Genovesi, A. Monorchio
High-Impedance Surfaces comprising multi-resonant elements are proposed as chipless tags. The presence of the ground plane in the structure is a key point in realizing a chipless RFID nearly insensitive with respect to the objects which the tags are placed on. The paper presents various encoding mechanisms used to design robust and compact chipless RFID tags able to work both on low-reflecting objects and on metallic structures.
{"title":"Chipless RFIDs by using metasurfaces","authors":"F. Costa, S. Genovesi, A. Monorchio","doi":"10.1109/EUCAP.2014.6902297","DOIUrl":"https://doi.org/10.1109/EUCAP.2014.6902297","url":null,"abstract":"High-Impedance Surfaces comprising multi-resonant elements are proposed as chipless tags. The presence of the ground plane in the structure is a key point in realizing a chipless RFID nearly insensitive with respect to the objects which the tags are placed on. The paper presents various encoding mechanisms used to design robust and compact chipless RFID tags able to work both on low-reflecting objects and on metallic structures.","PeriodicalId":22362,"journal":{"name":"The 8th European Conference on Antennas and Propagation (EuCAP 2014)","volume":"1 1","pages":"2384-2388"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88942870","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 : 2014-04-06DOI: 10.1109/EUCAP.2014.6902581
C. L. Patané, A. Skårbratt, C. Orlenius
The number of wireless devices with MIMO capability is rapidly increasing in the market. This calls for fast and accurate measurement methodologies to assess the full MIMO OTA performance of such devices. This paper elaborates upon the reverberation chamber as a fast and accurate state-of-the-art methodology for MIMO OTA performance analysis. It is shown that a standalone reverberation chamber provides the basic information needed to distinguish between a good and a bad MIMO OTA device, as well as how the reverberation chamber can be combined with a channel emulator to provide advanced evaluation. In addition, a repeatability study is performed, showing very good alignment of the results.
{"title":"Basic and advanced MIMO OTA testing of wireless devices using reverberation chamber","authors":"C. L. Patané, A. Skårbratt, C. Orlenius","doi":"10.1109/EUCAP.2014.6902581","DOIUrl":"https://doi.org/10.1109/EUCAP.2014.6902581","url":null,"abstract":"The number of wireless devices with MIMO capability is rapidly increasing in the market. This calls for fast and accurate measurement methodologies to assess the full MIMO OTA performance of such devices. This paper elaborates upon the reverberation chamber as a fast and accurate state-of-the-art methodology for MIMO OTA performance analysis. It is shown that a standalone reverberation chamber provides the basic information needed to distinguish between a good and a bad MIMO OTA device, as well as how the reverberation chamber can be combined with a channel emulator to provide advanced evaluation. In addition, a repeatability study is performed, showing very good alignment of the results.","PeriodicalId":22362,"journal":{"name":"The 8th European Conference on Antennas and Propagation (EuCAP 2014)","volume":"67 1","pages":"3488-3492"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83120901","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 : 2014-04-06DOI: 10.1109/EUCAP.2014.6901909
N. Tako, E. Levine, G. Kabilo, H. Matzner
Thick transitions from coaxial transmission lines to rectangular waveguides are proposed. The coaxial SMA connector enters into the broad wall of the waveguide and continues to the bottom of the waveguide. Two types of transitions are described in the S-band with 40% bandwidth: the first type is based on a polygonal shape and the second type is based on a curved elliptical cylinder. Very good agreement between simulations and measurements was achieved.
{"title":"Investigation of thick coax-to-waveguide transitions","authors":"N. Tako, E. Levine, G. Kabilo, H. Matzner","doi":"10.1109/EUCAP.2014.6901909","DOIUrl":"https://doi.org/10.1109/EUCAP.2014.6901909","url":null,"abstract":"Thick transitions from coaxial transmission lines to rectangular waveguides are proposed. The coaxial SMA connector enters into the broad wall of the waveguide and continues to the bottom of the waveguide. Two types of transitions are described in the S-band with 40% bandwidth: the first type is based on a polygonal shape and the second type is based on a curved elliptical cylinder. Very good agreement between simulations and measurements was achieved.","PeriodicalId":22362,"journal":{"name":"The 8th European Conference on Antennas and Propagation (EuCAP 2014)","volume":"168 1","pages":"908-911"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80579423","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 : 2014-04-06DOI: 10.1109/EUCAP.2014.6902225
H. Kim, Byungchul Kim, Youngju Lee
This paper presents an accurate analysis technique to estimate indoor propagation performance of a wireless local area network (WLAN) module in a commercial TV set. In particular, a hybrid technique is proposed which uses ray tracing method combined with the finite difference time domain (FDTD) method. FDTD method in a specific source regions and ray tracing method is applied for the rest of the area. The FDTD simulation is used for analyzing an accurate WLAN source region which consists of a WLAN module in the TV set and a concrete wall. The simulation results are compared to measurements for a number of cases. The correlation coefficients between measurement and simulation of the hybrid method are 0.84 for a line of sight (LOS) route and 0.83 for a non line of sight (NLOS) route which is higher than 0.56 and 0.73 based on conventional ray tracing method. This comparison shows that the hybrid model provides higher precision.
{"title":"An accurate indoor propagation analysis for Wi-Fi antenna embedded in a commercial TV set","authors":"H. Kim, Byungchul Kim, Youngju Lee","doi":"10.1109/EUCAP.2014.6902225","DOIUrl":"https://doi.org/10.1109/EUCAP.2014.6902225","url":null,"abstract":"This paper presents an accurate analysis technique to estimate indoor propagation performance of a wireless local area network (WLAN) module in a commercial TV set. In particular, a hybrid technique is proposed which uses ray tracing method combined with the finite difference time domain (FDTD) method. FDTD method in a specific source regions and ray tracing method is applied for the rest of the area. The FDTD simulation is used for analyzing an accurate WLAN source region which consists of a WLAN module in the TV set and a concrete wall. The simulation results are compared to measurements for a number of cases. The correlation coefficients between measurement and simulation of the hybrid method are 0.84 for a line of sight (LOS) route and 0.83 for a non line of sight (NLOS) route which is higher than 0.56 and 0.73 based on conventional ray tracing method. This comparison shows that the hybrid model provides higher precision.","PeriodicalId":22362,"journal":{"name":"The 8th European Conference on Antennas and Propagation (EuCAP 2014)","volume":"61 1","pages":"2111-2114"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80587288","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 : 2014-04-06DOI: 10.1109/EUCAP.2014.6902555
Chi-Chih Chen
This paper presents findings of our full-wave simulation study of electromagnetic wave propagation properties in typical underground continuous coal mining tunnel environments. It discusses different wave mechanisms involved as well as several different novel wave-launching concepts such as water-filled dielectric rod antenna, ceiling bolt monopole array, and end-fired array on the arm of cutting drum.
{"title":"Electromagnetic wave excitation and propagation in continuous coal mining tunnels","authors":"Chi-Chih Chen","doi":"10.1109/EUCAP.2014.6902555","DOIUrl":"https://doi.org/10.1109/EUCAP.2014.6902555","url":null,"abstract":"This paper presents findings of our full-wave simulation study of electromagnetic wave propagation properties in typical underground continuous coal mining tunnel environments. It discusses different wave mechanisms involved as well as several different novel wave-launching concepts such as water-filled dielectric rod antenna, ceiling bolt monopole array, and end-fired array on the arm of cutting drum.","PeriodicalId":22362,"journal":{"name":"The 8th European Conference on Antennas and Propagation (EuCAP 2014)","volume":"18 1","pages":"3387-3389"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79093049","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 : 2014-04-06DOI: 10.1109/EUCAP.2014.6902108
Ki Joon Kim, W. Choi, Jaeheung Kim, Y. Yoon
The penetration enhancement of non-invasive microwave hyperthermia applicator is presented. The 915 MHz branched dipole element used for planar array. The E-field from the single element determines the input phase and power of array applicator. The SAR ratio between surface and target depth is dominant for temperature distribution. The 5 cm effective treatment depth is achieved with 3-dimensional temperature simulation.
{"title":"Penetration enhancement of non-invasive microwave hyperthermia applicator","authors":"Ki Joon Kim, W. Choi, Jaeheung Kim, Y. Yoon","doi":"10.1109/EUCAP.2014.6902108","DOIUrl":"https://doi.org/10.1109/EUCAP.2014.6902108","url":null,"abstract":"The penetration enhancement of non-invasive microwave hyperthermia applicator is presented. The 915 MHz branched dipole element used for planar array. The E-field from the single element determines the input phase and power of array applicator. The SAR ratio between surface and target depth is dominant for temperature distribution. The 5 cm effective treatment depth is achieved with 3-dimensional temperature simulation.","PeriodicalId":22362,"journal":{"name":"The 8th European Conference on Antennas and Propagation (EuCAP 2014)","volume":"26 1","pages":"1669-1670"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79679835","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 : 2014-04-06DOI: 10.1109/EUCAP.2014.6902316
P. Kersaudy, A. Gati, A. Hadjem, N. Varsier, E. Conil, O. Picon, J. Wiart
The wireless communication networks are evolving with access point closer. The exposure induced by these access points is often assessed with a plane wave assumption. This communication presents the assessment of the exposure induced in a 8-year-old girl numerical model by a Femto antenna. This exposure is assessed using the equivalent principle through a ”Huygens box” matching the incident field emitted by a Femto antenna, described by Spherical Modes description to the numerical Finite-Difference Time-Domain (FDTD) method. The error made on the Whole Body SAR by approximating the Femto radiation by an equivalent Plane Wave is assessed for different distances separating the anatomical model and the Femto antenna.
{"title":"Equivalence principle use to assess the exposure induced by a Femto antenna at 2100MHz","authors":"P. Kersaudy, A. Gati, A. Hadjem, N. Varsier, E. Conil, O. Picon, J. Wiart","doi":"10.1109/EUCAP.2014.6902316","DOIUrl":"https://doi.org/10.1109/EUCAP.2014.6902316","url":null,"abstract":"The wireless communication networks are evolving with access point closer. The exposure induced by these access points is often assessed with a plane wave assumption. This communication presents the assessment of the exposure induced in a 8-year-old girl numerical model by a Femto antenna. This exposure is assessed using the equivalent principle through a ”Huygens box” matching the incident field emitted by a Femto antenna, described by Spherical Modes description to the numerical Finite-Difference Time-Domain (FDTD) method. The error made on the Whole Body SAR by approximating the Femto radiation by an equivalent Plane Wave is assessed for different distances separating the anatomical model and the Femto antenna.","PeriodicalId":22362,"journal":{"name":"The 8th European Conference on Antennas and Propagation (EuCAP 2014)","volume":"34 1","pages":"2462-2463"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81065593","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 : 2014-04-06DOI: 10.1109/EUCAP.2014.6902288
B. Le Lepvrier, R. Loison, R. Gillard, L. Patier, P. Potier, P. Pouliguen
A new hybrid method, the DG-FDTD/IPO, has recently been proposed to analyze surrounded antennas mounted on large platforms. In this paper the capabilities of this method to go through such large and complex problems are shown. More precisely, a deep analysis of the far-field radiated for a canonical antenna-on-platform scenario is proposed.
{"title":"Analysis of surrounded antennas mounted on large and complex structures using a hybrid method","authors":"B. Le Lepvrier, R. Loison, R. Gillard, L. Patier, P. Potier, P. Pouliguen","doi":"10.1109/EUCAP.2014.6902288","DOIUrl":"https://doi.org/10.1109/EUCAP.2014.6902288","url":null,"abstract":"A new hybrid method, the DG-FDTD/IPO, has recently been proposed to analyze surrounded antennas mounted on large platforms. In this paper the capabilities of this method to go through such large and complex problems are shown. More precisely, a deep analysis of the far-field radiated for a canonical antenna-on-platform scenario is proposed.","PeriodicalId":22362,"journal":{"name":"The 8th European Conference on Antennas and Propagation (EuCAP 2014)","volume":"30 1","pages":"2352-2355"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83317141","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 : 2014-04-06DOI: 10.1109/EUCAP.2014.6902391
D. Patron, K. Dandekar
In this paper we propose a pattern reconfigurable planar antenna with integrated control circuitry, for flexible applications with Software Defined Radio (SDR) platforms. The antenna's layout is made by four folded microstrip elements placed symmetrically on a low cost FR-4 substrate. By using PIN diodes, the metallic elements can be switched to generate a single omnidirectional beam or six directional beams around the azimuth plane. The design includes MOSFET based control circuitry for switching the PIN diodes. The RF performance has been experimentally evaluated under different levels of control voltage. The radiation of omnidirectional and directional beams along with an integrated control board, allows for convenient utilization of the antenna in numerous SDR MIMO platforms.
{"title":"Planar reconfigurable antenna with integrated switching control circuitry","authors":"D. Patron, K. Dandekar","doi":"10.1109/EUCAP.2014.6902391","DOIUrl":"https://doi.org/10.1109/EUCAP.2014.6902391","url":null,"abstract":"In this paper we propose a pattern reconfigurable planar antenna with integrated control circuitry, for flexible applications with Software Defined Radio (SDR) platforms. The antenna's layout is made by four folded microstrip elements placed symmetrically on a low cost FR-4 substrate. By using PIN diodes, the metallic elements can be switched to generate a single omnidirectional beam or six directional beams around the azimuth plane. The design includes MOSFET based control circuitry for switching the PIN diodes. The RF performance has been experimentally evaluated under different levels of control voltage. The radiation of omnidirectional and directional beams along with an integrated control board, allows for convenient utilization of the antenna in numerous SDR MIMO platforms.","PeriodicalId":22362,"journal":{"name":"The 8th European Conference on Antennas and Propagation (EuCAP 2014)","volume":"38 1","pages":"2737-2740"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83539370","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 : 2014-04-06DOI: 10.1109/EUCAP.2014.6902404
C. García-González, Y. Álvarez-López, F. Las-Heras, J. Laviada, Ana Arboleya-Arboleya, P. Rocca, G. Oliveri, A. Massa
An inverse scattering method based on the Surface Equivalent Principle and the use of Genetic Algorithms is presented in this contribution. This technique is used for the estimation of constitutive parameter of homogenous dielectrics with any permittivity and conductivity. The dielectric under test is illuminated with a set of plane waves at a single frequency, under 2D TM case assumption. The dielectric composition is estimated from the scattered field measured on a circumferential observation domain. Proper Genetic Algorithm tuning as well as inverse problem parameters coding have been tested by means of simulation examples.
{"title":"Inverse scattering problem of homogeneous dielectrics using Genetic Algorithms","authors":"C. García-González, Y. Álvarez-López, F. Las-Heras, J. Laviada, Ana Arboleya-Arboleya, P. Rocca, G. Oliveri, A. Massa","doi":"10.1109/EUCAP.2014.6902404","DOIUrl":"https://doi.org/10.1109/EUCAP.2014.6902404","url":null,"abstract":"An inverse scattering method based on the Surface Equivalent Principle and the use of Genetic Algorithms is presented in this contribution. This technique is used for the estimation of constitutive parameter of homogenous dielectrics with any permittivity and conductivity. The dielectric under test is illuminated with a set of plane waves at a single frequency, under 2D TM case assumption. The dielectric composition is estimated from the scattered field measured on a circumferential observation domain. Proper Genetic Algorithm tuning as well as inverse problem parameters coding have been tested by means of simulation examples.","PeriodicalId":22362,"journal":{"name":"The 8th European Conference on Antennas and Propagation (EuCAP 2014)","volume":"6 1","pages":"2788-2791"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88529254","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：