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In search of the perfect handset antenna 寻找完美的手机天线
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516866
S. Kingsley, D. Ireland, S. O’keefe, R. Langley, Luyi Liu
{"title":"In search of the perfect handset antenna","authors":"S. Kingsley, D. Ireland, S. O’keefe, R. Langley, Luyi Liu","doi":"10.1109/LAPC.2008.4516866","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516866","url":null,"abstract":"The 'perfect antenna' for a handset will be a very low profile module, perhaps measuring 35 x 10 x 3 or 4 mm and it may well have to share this volume with other components. It will work over a wide range of frequencies from perhaps as low as FM radio bands up to 6 GHz and will exhibit minimal detuning when held in the hand or used next to the head. It will be quickly and easily configured for different devices. There are physical limitations that prevent a simple internal antenna from meeting these requirements but there are various technologies and techniques that may be employed to get as close as possible to this perfect antenna. Here we look at some of these techniques and the tradeoffs to each.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"46 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":"130100218","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
An empirical study of computational optimisation techniques for microstrip antennas 微带天线计算优化技术的实证研究
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516916
Robert Woodhouse, Stuart Porter, Julian Miller
{"title":"An empirical study of computational optimisation techniques for microstrip antennas","authors":"Robert Woodhouse, Stuart Porter, Julian Miller","doi":"10.1109/LAPC.2008.4516916","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516916","url":null,"abstract":"An empirical study was performed (ongoing) to compare the efficiencies of various, until now untried, computational optimisation techniques for optimising microstrip antennas. The goal was to produce a dual-band probe fed antenna with bands centered at 3.5 and 4 GHz, each with a -10 dB, or less, return loss bandwidth of 100 MHz. Existing theory and studies at The University of York showed that optimising for directivity and polarisation was not necessary, thus making the problem considerably simpler. Results so far indicate that steady-state genetic algorithms are the most efficient optimisation techniques.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"1 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":"130102959","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
A novel tapered leaky wave antenna 一种新型锥形漏波天线
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516887
O. Losito
{"title":"A novel tapered leaky wave antenna","authors":"O. Losito","doi":"10.1109/LAPC.2008.4516887","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516887","url":null,"abstract":"A novel layout of leaky-wave antennas based on tapered design has been proposed and investigated. The new tapered leaky-wave antenna (LWA) was designed running a simple procedure which use an FDTD code, and using a physical grounding structure along the length of the antenna, which allows to use only half of the structure, the adoption of a simple feeding, and the reduction of sidelobes. The good performance of this new tapered microstrip LWA are mainly wider band of 33% for VSWR<2, higher gain (12 dBi) and higher efficiency (up to 85%). These performance can be improved furthermore using an array whit a double LWAs (bandwidth of 39.6% for VSWR<2 and gain of 3.5 dBi).","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"5 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":"130936260","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 wearable flexible multi-band antenna based on a square slotted printed monopole 基于方形开槽印刷单极子的可穿戴柔性多波段天线
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516937
L. Ma, R. Edwards, S. Bashir, M. I. Khattak
{"title":"A wearable flexible multi-band antenna based on a square slotted printed monopole","authors":"L. Ma, R. Edwards, S. Bashir, M. I. Khattak","doi":"10.1109/LAPC.2008.4516937","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516937","url":null,"abstract":"This paper presents a novel flexible wearable multi-band printed monopole antenna on a neoprene substrate. Bands covered are GSM 900 (890-960 MHz), DCS (1710- 1880 MHz), PCS (1850-1990 MHz), UMTS (1920-2170 MHz) and WLAN 2.4 GHz (2400-2484 MHz) bands. The antenna is optimised for performance on the body.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"1 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":"131034885","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: 17
Independent multiband antenna tuning using an active EBG 使用有源EBG的独立多波段天线调谐
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516886
Hyung-Joo Lee, K. L. Ford, R. Langley
{"title":"Independent multiband antenna tuning using an active EBG","authors":"Hyung-Joo Lee, K. L. Ford, R. Langley","doi":"10.1109/LAPC.2008.4516886","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516886","url":null,"abstract":"This paper describes ongoing work at the University of Sheffield concerning active Electromagnetic Band Gap (EBG) technology. The focus of the work presently is on developing systems, which can tune multiple \"in-phase\" frequency bands independently of each other. Results here show how a dual layer EBG has been designed, manufactured and tested, covering the frequency bands of 700-1200 MHz and 1700-2600 MHz.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"87 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":"133190586","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: 5
Comparison of MIMO communications systems based on experimentally observed unbalanced and balanced transmission line channels 基于实验观察的非平衡和平衡传输线信道的MIMO通信系统的比较
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516892
P. Chambers, C. Downing, H. Baher
{"title":"Comparison of MIMO communications systems based on experimentally observed unbalanced and balanced transmission line channels","authors":"P. Chambers, C. Downing, H. Baher","doi":"10.1109/LAPC.2008.4516892","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516892","url":null,"abstract":"A comparative analysis of MIMO communications based on physical measurements of balanced and unbalanced transmission line channels is presented. Specifically, the effect of imperfect knowledge of the channel is considered. The novel contribution of this work lies in the fact that measurements of far end crosstalk signal paths and transmission line signal paths on unbalanced transmission lines over a frequency range from 300 kHz to 100 MHz will be incorporated into this analysis. Also, this work presents a comparative capacity analysis of MIMO communications systems based on balanced transmission line channels and unbalanced transmission line channels where the extent of imperfect knowledge of the channel is quantified by the variance of the complex normally distributed scalar elements of a matrix and this has not been reported in literature to date. The physical measurements on the unbalanced transmission lines are offered here as being indicative of poor quality transmission lines where crosstalk levels and insertion losses are so significant that these poor quality transmission lines would be deemed out-of-range for high speed internet connections.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"1 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":"129927370","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
Validation of QO design tool for analysing aberration caused by FSS FSS像差分析QO设计工具的验证
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516927
A. Yamsiri, R. Donnan
{"title":"Validation of QO design tool for analysing aberration caused by FSS","authors":"A. Yamsiri, R. Donnan","doi":"10.1109/LAPC.2008.4516927","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516927","url":null,"abstract":"High accuracy measurement is needed for ability to understand and control source of error caused by aberration effects of planar quasi optical (QO) components used in remote sensing system. This paper demonstrates a tool for modelling an FSS among a train of reflectors constituting a typical QO feed system. Such a capability facilitates later studies of aberration introduced specifically by the FSS.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"131 6 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":"130818089","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 novel low-profile antenna with hemispherical coverage suitable for wireless and mobile communications applications 一种新颖的低轮廓天线，具有半球形覆盖，适用于无线和移动通信应用
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516935
P. Turalchuk, D. Kholodnyak, O. Vendik
{"title":"A novel low-profile antenna with hemispherical coverage suitable for wireless and mobile communications applications","authors":"P. Turalchuk, D. Kholodnyak, O. Vendik","doi":"10.1109/LAPC.2008.4516935","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516935","url":null,"abstract":"Design of a novel planar antenna, which is based on a combination of a dipole and a loop that provides a cardioid radiation pattern in two planes and therefore a hemispherical coverage, is proposed. The dipole-loop antenna with hemispherical radiation pattern and doubled gain as compared with conventional omni-directional antennas could be promising for wireless and mobile communications applications as it could reduce signal fading, lower energy consumption by the phone transmitter and decrease harmful influence of microwave electromagnetic field on phone user.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"50 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":"130869737","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: 5
Application of the invasive weed optimization technique for antenna configurations 入侵杂草优化技术在天线配置中的应用
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516957
A. Mallahzadeh, H. Oraizi, Zahra Davoodi-Rad
{"title":"Application of the invasive weed optimization technique for antenna configurations","authors":"A. Mallahzadeh, H. Oraizi, Zahra Davoodi-Rad","doi":"10.1109/LAPC.2008.4516957","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516957","url":null,"abstract":"In this paper a novel numerical optimization technique for antenna configurations is introduced. This algorithm is inspired from colonizing weeds, which is shown to be very robust and adaptive to changes in the environment. Thus, capturing their properties would lead to a powerful optimization algorithm. The feasibility, efficiency and effectiveness of the proposed algorithm for optimization of antenna problems are examined by a set of antenna configurations. The obtained results are compared with a particle swarm optimization technique which is widely used in antenna optimization. Numerical results show that there is a good agreement between the corresponding results.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"1 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":"130256651","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: 166
Patch antenna directivity analysis using an equi-area method 用等面积法分析贴片天线的指向性
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516938
S. Ullah, J. Flint, R. Seager
{"title":"Patch antenna directivity analysis using an equi-area method","authors":"S. Ullah, J. Flint, R. Seager","doi":"10.1109/LAPC.2008.4516938","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516938","url":null,"abstract":"The widespread exploitation of mobile cellular phones and use of wireless devices such as PDAs, in-vehicle Global Positioning System (GPS) receivers, and the future deployment of mobile satellite digital audio and video has developed a re-energized interest in efficient and accurate measurement techniques for antennas. This paper demonstrates directivity analysis of a patch antenna using a new fast, rotation-invariant spherical near-field antenna measurement technique. The method is based on an equi-area surface partitioning algorithm. The paper evaluates the sampling technique's performance when compared with a normal spherical near-field measurement technique using equal angle sampling.","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":"130460496","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
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