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2008 Loughborough Antennas and Propagation Conference最新文献

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Switching a dual-band planar inverted-F antenna to operate in eight frequency bands 切换双频平面倒f天线，使其在8个频带中工作
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516872
M. Komulainen, H. Jantunen
{"title":"Switching a dual-band planar inverted-F antenna to operate in eight frequency bands","authors":"M. Komulainen, H. Jantunen","doi":"10.1109/LAPC.2008.4516872","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516872","url":null,"abstract":"This paper describes the implementation of a dual-band planar inverted-F antenna that is electrically switched to operate in eight frequency bands. The eight bands are achieved by combining two frequency tuning concepts studied in our previous works. The complete tuning circuitry, consisting of three RF PIN diode switches and four passive components, is implemented without increasing the overall volume of the antenna. The antenna covers the 750-1080 MHz band with 25% and the 1560-2270 MHz band with 50% total efficiency margins.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126123615","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
Field distributions within a rectangular cavity with vehicle-like features 具有车辆特征的矩形腔内的场分布
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516902
Hui Zhang, J. Rigelsford, L. Low, R. Langley
{"title":"Field distributions within a rectangular cavity with vehicle-like features","authors":"Hui Zhang, J. Rigelsford, L. Low, R. Langley","doi":"10.1109/LAPC.2008.4516902","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516902","url":null,"abstract":"A model vehicle cabin is constructed to investigate 3D field distributions generated by an onboard transmitter within the large partial cavity. Simulations performed using FEKO and CST microwave studio (CST MWS) are found to be in good agreement with internal field measurements acquired using a low disturbance automated probe positioner at 870 MHz. Results show vehicle furnishings change field distribution within the cavity and should be included for electromagnetic modelling and field exposure assessments. The study enhances understanding of complex field behavior within a vehicle. The results (e.g. E-field hotspots) can be used to optimize placement locations of on-board transmitters and introduce field mitigation techniques in appropriate locations if required.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128603048","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: 13
Enhanced outdoor-to-indoor coverage estimation in microcells 增强的微蜂窝室内外覆盖估计
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516956
F. Kakar, M. Khalid, F.A. Suri
{"title":"Enhanced outdoor-to-indoor coverage estimation in microcells","authors":"F. Kakar, M. Khalid, F.A. Suri","doi":"10.1109/LAPC.2008.4516956","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516956","url":null,"abstract":"Outdoor-to-Indoor propagation loss has been measured in four buildings in urban microcells. The results of the performed experiment as well as those of several other authors, are compared with COST231 model prediction and postulates are presented for improved coverage estimation in buildings with LOS illumination-an empirical equation for loss in the externally illuminated wall at perpendicular penetration is presented, heterogeneous building surface is fictitiously divided into multiple segments, and paths through NLOS surfaces are also considered for reception points located deep inside the building. It is shown that the proposed enhancements improve the COST231 model estimation error by approximately 3 dB.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"os-14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127971147","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
Estimation of an error on phase progression measurement on microwave line-of-sight link 微波视距链路相进测量误差估计
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516871
I. Shirokov, Y. Gimpilevich, G. Jandieri
{"title":"Estimation of an error on phase progression measurement on microwave line-of-sight link","authors":"I. Shirokov, Y. Gimpilevich, G. Jandieri","doi":"10.1109/LAPC.2008.4516871","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516871","url":null,"abstract":"In the presented paper the principle of work of the equipment for microwave propagation investigations is considered. The equipment lets to carry out the measurements of fluctuation of amplitude, phase progression of microwave. The equipment realizes homodyne method of measurements. In a paper there are discussed the problems of influence of fluctuations of initial phase of microwave oscillations on a phase errors of measurements. In a paper there were shown the ways of elimination of an error of measurements due to fluctuation of initial phase of microwave.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126600087","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 study on the effect of loop-like jewellery items worn on human hand on specific absorption rate (SAR) at 1900 MHz 人手戴环形首饰对1900兆赫比吸收率(SAR)影响的研究
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516925
N. A. Samsuri, James A. Flint
{"title":"A study on the effect of loop-like jewellery items worn on human hand on specific absorption rate (SAR) at 1900 MHz","authors":"N. A. Samsuri, James A. Flint","doi":"10.1109/LAPC.2008.4516925","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516925","url":null,"abstract":"This paper presents simulation results that evaluate the effect of loop-like jewellery items (rings and bangles) worn on human fingers and wrist on SAR in the human head and the hand. The jewellery items were modelled as conducting objects with the typical commercial sizes available. Rings were placed on different fingers in a computer model for comparison purposes. The amount of energy absorbed in the head/hand and the effect brought about by the jewellery are shown to vary for different antennas. In this study, a monopole and a PIFA antenna have been employed. The results obtained indicated that: (i) by using a monopole antenna, the peak and average 1 g SAR in the head are slightly decreased by the introduction of the ring and bangle, (ii) by using a PIFA, the peak and average 1 g SAR in the head are increase by more than 12% and 11% respectively by the metallic rings.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130371418","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: 13
Recent progress on metamaterial researches at Southeast University 东南大学超材料研究进展
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516862
T. Cui
{"title":"Recent progress on metamaterial researches at Southeast University","authors":"T. Cui","doi":"10.1109/LAPC.2008.4516862","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516862","url":null,"abstract":"I will report the recent progress of metamaterial researches conducted in Southeast University and collaborated with Duke University in this presentation. Our metamaterial researches include theoretical discoveries and experimental verifications of novel properties, and real applications in microwave components and antennas.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130733392","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
Conformal archimedian spirals array over a perfectly conducting cylinder 共形阿基米德螺旋排列在一个完全导电的圆柱体上
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516919
J. Wu, S. Khamas, G. Cook
{"title":"Conformal archimedian spirals array over a perfectly conducting cylinder","authors":"J. Wu, S. Khamas, G. Cook","doi":"10.1109/LAPC.2008.4516919","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516919","url":null,"abstract":"A conformal Archimedian spirals array is modelled over a perfectly conducting cylindrical surface using the method of moments. Mutual coupling, radiation patterns and axial ratio have been calculated. Results have been validated against simulations using a commercial software package.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131998938","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
An experimental millimetre wave imaging system 实验用毫米波成像系统
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516908
L. Zhang, Y. Hao, C. Parini, J. Dupuy
{"title":"An experimental millimetre wave imaging system","authors":"L. Zhang, Y. Hao, C. Parini, J. Dupuy","doi":"10.1109/LAPC.2008.4516908","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516908","url":null,"abstract":"MMW (millimetre wave) imaging is considered as an effective approach to CWD (concealed weapon detection). In this paper, an experimental millimetre wave imaging system based on an aperture synthesis approach is designed. The system is used to scan a metallic object and the resulting field distribution has been recorded. To reconstruct the image, a holographic processing algorithm is applied and a focused image is obtained. The system is active and works at a single frequency, 92.5 GHz. It can be used to investigate the optimized system parameters such as antenna beam width, operating range from the target and aperture array element spacing, etc.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133692024","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
Ultra-wideband measurements and results for sparse off-body communication channels 稀疏离体通信信道的超宽带测量与结果
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516904
A. Goulianos, T. Brown, S. Stavrou
{"title":"Ultra-wideband measurements and results for sparse off-body communication channels","authors":"A. Goulianos, T. Brown, S. Stavrou","doi":"10.1109/LAPC.2008.4516904","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516904","url":null,"abstract":"This paper presents a measurement-based statistical channel model for describing UWB off-body propagation and is valid for the frequency range from 3.5 to 6.5 GHz. This model is expressed with respect to both radial and azimuth coordinates, and is physically motivated by creeping wave propagation around smooth convex surfaces, such as the human body. Consequently, it maintains the exponential decay path loss trend with respect to the body orientation angle. Furthermore, it is shown that the same model can be used for RMS delay spread prediction, by simply applying the appropriate parameters resulting from time dispersion analysis. Therefore, delay spread results are presented for threshold values of 10 and 20 dB within the peak of each power delay profile. Following the presented modeling method model parameters can be used as criterion for characterization of respective dense multipath channels.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"432 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132310128","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: 13
A CPW-fed bow-tie slot antenna with tuning stub 带调谐存根的cpw馈电领结槽天线
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516948
L. Marantis, P. Brennan
{"title":"A CPW-fed bow-tie slot antenna with tuning stub","authors":"L. Marantis, P. Brennan","doi":"10.1109/LAPC.2008.4516948","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516948","url":null,"abstract":"In this paper, a modified slot bow-tie antenna fed by a coplanar waveguide (CPW) is investigated for wideband operation. It is designed to work on a thin substrate (h = 0.787 mm) with a low dielectric constant (epsivr = 2.2) operating at two frequencies (1.8 and 2.4 GHz). Two metal stubs are introduced in the middle of the bow-tie slot in order to achieve a wider impedance bandwidth over the conventional CPW-fed bow-tie slot antenna. The antenna is fabricated and tested in the antenna measurement facility of UCL and experimental far-field results are presented showing low cross-polarisation levels. The bow-tie slot antenna can obtain at least 55% bandwidth.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"196 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132656779","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: 32
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