Pub Date : 2012-10-04DOI: 10.1109/IWEM.2012.6320331
Y. Hao
In this paper, on-body propagation modelling has been investigated applying various numerical computational techniques. Propagation measurements with body-worn antennas have been carried out at 2.4 GHz inside and outside an anechoic chamber respectively for narrowband communication channel characterisation. Both simulation and measurement results have been also obtained at the UWB (ultra wide-band) band.
{"title":"Antennas and propagation for body centric wireless communications","authors":"Y. Hao","doi":"10.1109/IWEM.2012.6320331","DOIUrl":"https://doi.org/10.1109/IWEM.2012.6320331","url":null,"abstract":"In this paper, on-body propagation modelling has been investigated applying various numerical computational techniques. Propagation measurements with body-worn antennas have been carried out at 2.4 GHz inside and outside an anechoic chamber respectively for narrowband communication channel characterisation. Both simulation and measurement results have been also obtained at the UWB (ultra wide-band) band.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124699998","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 : 2005-04-03DOI: 10.1109/WCACEM.2005.1469730
M. Hiranandani, A. Yakovlev, A. Kishk
New designs of hard and soft surfaces realized by dipole and slot frequency selective surfaces (FSS) implemented on a grounded dielectric slab are presented. These structures act as GO or STOP surfaces for transverse electric (TE) and transverse magnetic (TM) polarizations, respectively, depending on the direction of a plane wave excitation. Multi-band and dual polarized designs are proposed based on the use of FSS structures with different resonant lengths and orientation of dipoles and slots. EMPiCASSO commercial software is used for the full-wave analysis of presented FSS configurations.
{"title":"Hard and soft surfaces realized by frequency selective surfaces on a grounded dielectric slab","authors":"M. Hiranandani, A. Yakovlev, A. Kishk","doi":"10.1109/WCACEM.2005.1469730","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469730","url":null,"abstract":"New designs of hard and soft surfaces realized by dipole and slot frequency selective surfaces (FSS) implemented on a grounded dielectric slab are presented. These structures act as GO or STOP surfaces for transverse electric (TE) and transverse magnetic (TM) polarizations, respectively, depending on the direction of a plane wave excitation. Multi-band and dual polarized designs are proposed based on the use of FSS structures with different resonant lengths and orientation of dipoles and slots. EMPiCASSO commercial software is used for the full-wave analysis of presented FSS configurations.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121059882","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 : 2005-04-03DOI: 10.1109/WCACEM.2005.1469637
J. V. van Tonder, U. Jakobus
Complex scattering problems are solved with the multilevel fast multipole method (MLFMM). Geometries include metallic structures (wires and surfaces) as well as dielectric bodies (volume and surface equivalence principle). Validation and application examples show the large savings in memory and run-time of the MLFMM as compared to the standard method of moments (MoM). Limitations regarding dielectric bodies are addressed, which are encountered when attempting to model highly lossy dielectric bodies with a high permittivity.
{"title":"Fast multipole solution of metallic and dielectric scattering problems in FEKO","authors":"J. V. van Tonder, U. Jakobus","doi":"10.1109/WCACEM.2005.1469637","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469637","url":null,"abstract":"Complex scattering problems are solved with the multilevel fast multipole method (MLFMM). Geometries include metallic structures (wires and surfaces) as well as dielectric bodies (volume and surface equivalence principle). Validation and application examples show the large savings in memory and run-time of the MLFMM as compared to the standard method of moments (MoM). Limitations regarding dielectric bodies are addressed, which are encountered when attempting to model highly lossy dielectric bodies with a high permittivity.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127345444","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 : 2005-04-03DOI: 10.1109/WCACEM.2005.1469710
J.P. Van't Hof, D. Stancil
Wireless communications inside enclosed space environments (e.g. aircraft wings and fuselage, auto-mobile engine compartments, etc.) provides a unique opportunity for sensor networks and instrumentation systems native to these spaces to operate with improved reliability, flexibility and capabilities. Since these enclosed environments are typically surrounded by reflective boundaries (i.e. metallic walls), the enclosed-space radio channel is very dispersive and presents a significant challenge to radio communications. In this work, empirical dispersion measurements in representative enclosed space environments are made and a simple model which considers only the enclosure volume, surface area, conductivity and frequency of operation, is found to predict dispersion parameters in the enclosed space channel with good results.
{"title":"Characterizing dispersion in the enclosed-space radio channel using a composite mode model","authors":"J.P. Van't Hof, D. Stancil","doi":"10.1109/WCACEM.2005.1469710","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469710","url":null,"abstract":"Wireless communications inside enclosed space environments (e.g. aircraft wings and fuselage, auto-mobile engine compartments, etc.) provides a unique opportunity for sensor networks and instrumentation systems native to these spaces to operate with improved reliability, flexibility and capabilities. Since these enclosed environments are typically surrounded by reflective boundaries (i.e. metallic walls), the enclosed-space radio channel is very dispersive and presents a significant challenge to radio communications. In this work, empirical dispersion measurements in representative enclosed space environments are made and a simple model which considers only the enclosure volume, surface area, conductivity and frequency of operation, is found to predict dispersion parameters in the enclosed space channel with good results.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123662663","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 : 2005-04-03DOI: 10.1109/WCACEM.2005.1469714
G. Hankins, L. Vahala, J. Beggs
Electromagnetic propagation models for signal strength prediction within aircraft cabins are essential for evaluating and designing a wireless communication system to be implemented onboard aircraft. A prediction model was developed for a B777 using commercial grade software intended for predictions within offices and buildings. The performance of the model was evaluated through a comparison with test data measurements taken on the aircraft. It was concluded that the model can accurately predict power propagation throughout the cabin. This model can enhance researchers' understanding of power propagation within aircraft cabins and will aid in future research.
{"title":"802.11ab propagation prediction inside a B777","authors":"G. Hankins, L. Vahala, J. Beggs","doi":"10.1109/WCACEM.2005.1469714","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469714","url":null,"abstract":"Electromagnetic propagation models for signal strength prediction within aircraft cabins are essential for evaluating and designing a wireless communication system to be implemented onboard aircraft. A prediction model was developed for a B777 using commercial grade software intended for predictions within offices and buildings. The performance of the model was evaluated through a comparison with test data measurements taken on the aircraft. It was concluded that the model can accurately predict power propagation throughout the cabin. This model can enhance researchers' understanding of power propagation within aircraft cabins and will aid in future research.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116569303","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 : 2005-04-03DOI: 10.1109/WCACEM.2005.1469579
M. Karkkainen, C. Simovski, M. Ermutlu, S. Tretyakov, P. Ikonen
A new simple technique to excite microstrip lines with the finite-difference time-domain method (FDTD) is introduced. In the model, the incident voltages are calculated in an auxiliary ID transmission line that is connected to the 3D problem space at the feeding location. The proposed model allows to extract the scattering parameters with a single 3D FDTD run with a reduced simulation time as compared with many of the well-known excitation models. The model is applied to simulate a microstrip patch antenna with an artificial magneto-dielectric material filling.
{"title":"New FDTD model for excitation of microstrip lines","authors":"M. Karkkainen, C. Simovski, M. Ermutlu, S. Tretyakov, P. Ikonen","doi":"10.1109/WCACEM.2005.1469579","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469579","url":null,"abstract":"A new simple technique to excite microstrip lines with the finite-difference time-domain method (FDTD) is introduced. In the model, the incident voltages are calculated in an auxiliary ID transmission line that is connected to the 3D problem space at the feeding location. The proposed model allows to extract the scattering parameters with a single 3D FDTD run with a reduced simulation time as compared with many of the well-known excitation models. The model is applied to simulate a microstrip patch antenna with an artificial magneto-dielectric material filling.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122379237","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 : 2005-04-03DOI: 10.1109/WCACEM.2005.1469561
E. Jedari, M. Hakkak, M. Okhovvat, A. Foroozesh
In this paper we study the sensitivity and bandwidth of the short wire dipoles fed by two-coaxial feeder. This balun has recently become popular for short electromagnetic pulse measurement purposes. The sensitivity and bandwidth of five different short wire dipoles are compared. A peak-to-peak voltage received at the port of the probe is considered as a gauge of the sensitivity while the %50 pulse-width detected by the probe is used for bandwidth comparisons.
{"title":"Short electromagnetic pulse probe fed by two-coaxial balun: sensitivity and bandwidth examining","authors":"E. Jedari, M. Hakkak, M. Okhovvat, A. Foroozesh","doi":"10.1109/WCACEM.2005.1469561","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469561","url":null,"abstract":"In this paper we study the sensitivity and bandwidth of the short wire dipoles fed by two-coaxial feeder. This balun has recently become popular for short electromagnetic pulse measurement purposes. The sensitivity and bandwidth of five different short wire dipoles are compared. A peak-to-peak voltage received at the port of the probe is considered as a gauge of the sensitivity while the %50 pulse-width detected by the probe is used for bandwidth comparisons.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122402296","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 : 2005-04-03DOI: 10.1109/WCACEM.2005.1469751
Fang-Biau Ueng, Shiann-Jeng Yu
The generalized sidelobe canceller (GSC) is an efficient implementation of the direction constrained adaptive array. Conventional GSC is designed according to a quiescent weight vector and a blocking matrix. The quiescent weight vector provides the array with specified array response at some direction. The blocking matrix is designed based on priori knowledge of the direction of arrival (DOA) of the desired signal. In this paper, we propose a new GSC-based adaptive array without priori knowledge of the DOA of the desired signal. This paper utilizes eigen subspace decomposition and statistically cyclostationary properties of the signals to design the adaptive array. A method for constructing the most efficient blocking matrix for the GSC is developed. Simulation examples illustrate the effectiveness of the proposed method.
{"title":"A new GSC-based adaptive array","authors":"Fang-Biau Ueng, Shiann-Jeng Yu","doi":"10.1109/WCACEM.2005.1469751","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469751","url":null,"abstract":"The generalized sidelobe canceller (GSC) is an efficient implementation of the direction constrained adaptive array. Conventional GSC is designed according to a quiescent weight vector and a blocking matrix. The quiescent weight vector provides the array with specified array response at some direction. The blocking matrix is designed based on priori knowledge of the direction of arrival (DOA) of the desired signal. In this paper, we propose a new GSC-based adaptive array without priori knowledge of the DOA of the desired signal. This paper utilizes eigen subspace decomposition and statistically cyclostationary properties of the signals to design the adaptive array. A method for constructing the most efficient blocking matrix for the GSC is developed. Simulation examples illustrate the effectiveness of the proposed method.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122492069","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 : 2005-04-03DOI: 10.1109/WCACEM.2005.1469641
V. Ramani, C. Reddy, A. Martin
A numerical study of a thin-wire probe inside a slotted rectangular cavity is presented in this work. The results obtained with the 3-D full-wave method of moments based code FEKO is compared to the computations in Ramani, V (2004). The motivation for this study stems from the wide usage of high power RF excitations in electronic systems. Electromagnetic coupling and interference [Christopoulos C. et al., 2001] in electronic devices (computers, sensors, control and communication devices, etc.) is of increasing concern due to the presence of both intentional and un-intentional internal/external electromagnetic sources. After the preliminary comparison of results we introduce a finite conductivity into the walls of the cavity to resemble more practical problems for simulations with FEKO.
本文对狭缝矩形腔内的细线探针进行了数值研究。将基于矩量编码FEKO的三维全波方法得到的结果与Ramani, V(2004)的计算结果进行了比较。本研究的动机源于高功率射频激励在电子系统中的广泛应用。电子设备(计算机、传感器、控制和通信设备等)中的电磁耦合和干扰[Christopoulos C. et al.， 2001]由于有意和无意的内部/外部电磁源的存在，越来越受到关注。在对结果进行初步比较后，我们在腔壁上引入了有限电导率，以模拟FEKO模拟的更实际的问题。
{"title":"Analysis of a narrow slot backed by a rectangular cavity using FEKO","authors":"V. Ramani, C. Reddy, A. Martin","doi":"10.1109/WCACEM.2005.1469641","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469641","url":null,"abstract":"A numerical study of a thin-wire probe inside a slotted rectangular cavity is presented in this work. The results obtained with the 3-D full-wave method of moments based code FEKO is compared to the computations in Ramani, V (2004). The motivation for this study stems from the wide usage of high power RF excitations in electronic systems. Electromagnetic coupling and interference [Christopoulos C. et al., 2001] in electronic devices (computers, sensors, control and communication devices, etc.) is of increasing concern due to the presence of both intentional and un-intentional internal/external electromagnetic sources. After the preliminary comparison of results we introduce a finite conductivity into the walls of the cavity to resemble more practical problems for simulations with FEKO.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117012451","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 : 2005-04-03DOI: 10.1109/WCACEM.2005.1469583
K. Prokopidis, T. Tsiboukis
A three-dimensional (3-D) time-domain numerical method is used for simulation of ground penetrating radar (GPR) on Debye-dispersive soil. The radar unit is modeled with two transmitters and one receiver in order to eliminate undesired signals. The impact of radar frequency, soil parameters and object depth upon the ability to detect buried targets is investigated through several FDTD simulations.
{"title":"Modeling of ground-penetrating radar for detecting buried objects in dispersive soils","authors":"K. Prokopidis, T. Tsiboukis","doi":"10.1109/WCACEM.2005.1469583","DOIUrl":"https://doi.org/10.1109/WCACEM.2005.1469583","url":null,"abstract":"A three-dimensional (3-D) time-domain numerical method is used for simulation of ground penetrating radar (GPR) on Debye-dispersive soil. The radar unit is modeled with two transmitters and one receiver in order to eliminate undesired signals. The impact of radar frequency, soil parameters and object depth upon the ability to detect buried targets is investigated through several FDTD simulations.","PeriodicalId":368249,"journal":{"name":"IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005.","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114225640","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：