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2008 Loughborough Antennas and Propagation Conference最新文献

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Printed curl CP antenna design 印刷卷曲CP天线设计
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516878
S. O'Kane, V. Fusco
{"title":"Printed curl CP antenna design","authors":"S. O'Kane, V. Fusco","doi":"10.1109/LAPC.2008.4516878","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516878","url":null,"abstract":"A right hand circular polarised antenna operating at 11.85 GHz is implemented using a printed curl section. The antenna is designed and analysed using Micro-Stripes 7.0, and fabricated on TLY5A substrate. Experimental and theoretical comparisons are made. The gain of the antenna is approximately 8 dB and it provides < 3 dB axial ratio over 8.4%.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"195 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":"116660685","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
The inverted Π dielectric waveguide for microwave applications 微波应用的反向Π介电波导
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516962
J. Rodríguez, S. Fernández, M. Garcia, D. Pozo
{"title":"The inverted Π dielectric waveguide for microwave applications","authors":"J. Rodríguez, S. Fernández, M. Garcia, D. Pozo","doi":"10.1109/LAPC.2008.4516962","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516962","url":null,"abstract":"We present the inverted Pi dielectric waveguide as an alternative for designing tunable microwave devices as well as electromagnetic band gaps structures. Inverted Pi dielectric waveguides in cascade, and with high index contrast, are enclosed by metallic rectangular waveguides. The generalized scattering matrix concept, together with the generalized telegraphist equations formulism and the modal matching technique was implemented for theoretical analysis. Numerical and experimental results confirm the possibilities of the new dielectric waveguide for designing single and low cost tunable microwave devices. Power splitters, electromagnetic windows and electromagnetic band gaps multidevice can be obtained on the same configuration.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"15 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":"117114299","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
Tuning of A 24-GHZ array using near-field measurements 用近场测量调谐24ghz阵列
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516912
M. Martínez-Vázquez, O. Litschke, A. Bettray, M. Bottcher
{"title":"Tuning of A 24-GHZ array using near-field measurements","authors":"M. Martínez-Vázquez, O. Litschke, A. Bettray, M. Bottcher","doi":"10.1109/LAPC.2008.4516912","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516912","url":null,"abstract":"In this paper, a near field analysis based on measurements is used in order to optimise the feeding network of a 24-GHz radar array. The near field measurement results were used to tweak the network and optimise the performance of the antenna in terms of phase distribution and sidelobe levels.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"20 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120906395","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
Novel sequential rotation technique for broadband circularly polarized microstrip ring antennas 宽带圆极化微带环形天线的顺序旋转新技术
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516932
K. Tong, Jie Du, Jingjing Huang
{"title":"Novel sequential rotation technique for broadband circularly polarized microstrip ring antennas","authors":"K. Tong, Jie Du, Jingjing Huang","doi":"10.1109/LAPC.2008.4516932","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516932","url":null,"abstract":"A new sequential rotation technique for wideband circularly polarized ring antennas has been investigated. The concept is based on the reconfigurable proximity coupling feeding method proposed by the author recently. Theoretical investigations show that wider axial ratio bandwidth can be obtained. Moreover, it can retain the advantages of the switching between right-handed (RH) and left-handed (LP) circular polarization (CP) easily. The proposed club-shaped microstrip feed line excites the fundamental TM11 mode of the three ring radiating elements through proximity coupling along the semi-annular section of the line. The phase differences between elements are about 120 degree. The induced rotating surface currents on the ring radiators contribute to the circular polarization characteristic of the antennas. Prototypes operate at 2.4 GHz have been designed to show the basic operating principles of the antennas. Simulated return loss, axial ratio, gain and radiation patterns of the antennas have been presented.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"17 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":"124807479","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: 4
Tunable microstrip antenna using switchable patches 使用可切换贴片的可调谐微带天线
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516909
J. A. Zammit, A. Muscat
{"title":"Tunable microstrip antenna using switchable patches","authors":"J. A. Zammit, A. Muscat","doi":"10.1109/LAPC.2008.4516909","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516909","url":null,"abstract":"The latest and next generation mobile radio terminals require access to different wireless networks that operate on different radio frequency bands. Additionally requirements such as a varying asymmetric data rate are needed for the efficient transmission of multimedia services. To operate effectively such terminals need either a single ultra wideband antenna that spans all the useful mobile frequencies, or an antenna that can be tuned to the required relatively narrow bands when desirable. In this paper a low-profile tunable microstrip antenna structure using switched parasitic patches is studied. The frequency of operation of the prototype can be tuned from 1.36 GHz to 1.92 GHz using a total of 13 different switch combinations. The antenna is simulated, built and tested. The switches in the prototype are replaced with copper strip bridges. The measured results are in good agreement with the simulations.","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":"128422053","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: 14
Recent progress in switched beam single element antennas 开关波束单元天线研究进展
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516928
A. Mehta, D. Mirshekar-Syahkav, P. Massey
{"title":"Recent progress in switched beam single element antennas","authors":"A. Mehta, D. Mirshekar-Syahkav, P. Massey","doi":"10.1109/LAPC.2008.4516928","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516928","url":null,"abstract":"This paper covers five different types of single element beam scanning antennas under electronic switch control. Firstly, a rectangular spiral antenna with shorting and open switches is presented. Following that, its polarization and other antenna parameter limitations are addressed. Then new structures, namely: star strip, star patch and square loop antennas, introduced to overcome the polarization problem in the spiral antenna, are covered. All these new antennas are symmetrical, and have 4 feeding points. When excited individually, these feeding points generate four tilted beams of the same characteristics in different quadrants, yielding a complete beam scanning antenna. The gains for these three antennas for each of the feed configurations are approximately 8.1 dBi and the polarization dominance is in the Ethetas direction. Finally future work on implementing switches including MEMS on the ground plane of the antennas for switching the beam of the antennas is outlined.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"138 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":"128782952","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
New facility for minimally invasive measurements of electrically small antennas 用于微创测量电小天线的新设备
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516929
T. Loh, M. Alexander
{"title":"New facility for minimally invasive measurements of electrically small antennas","authors":"T. Loh, M. Alexander","doi":"10.1109/LAPC.2008.4516929","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516929","url":null,"abstract":"Present and emerging wireless communications technologies present measurement and calibration problems that are not adequately catered for by existing facilities. Our aim in this research work is to construct, test and report a new antenna facility for minimally invasive measurements of electrically small antennas. This facility will allow antenna designers and system users to be able to evaluate and calibrate small and smart antennas and will help to remove current technical and commercial barriers that are being caused by a lack of traceability, which leads to measurement discrepancy. The small-antenna test range and electro-optic (EO) transducer employed for this new facility are described and the capability of the EO transducer is explored.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"91 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":"129904661","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
Active coating for wind turbine blades 用于风力涡轮机叶片的活性涂层
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516885
B. Chambers, K. L. Ford, A. Tennant
{"title":"Active coating for wind turbine blades","authors":"B. Chambers, K. L. Ford, A. Tennant","doi":"10.1109/LAPC.2008.4516885","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516885","url":null,"abstract":"Potential designs for active coatings for the blades of wind turbine generators are investigated which operate at frequencies around 3 GHz and 9 GHz, corresponding to the air-traffic control (ATC) and marine radar bands. The designs are verified experimentally using large area test panels.","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":"125972151","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
Dual band wearable antenna 双波段可穿戴天线
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516853
R. Langley, Shaozhen Zhu
{"title":"Dual band wearable antenna","authors":"R. Langley, Shaozhen Zhu","doi":"10.1109/LAPC.2008.4516853","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516853","url":null,"abstract":"An antenna fabricated using clothing materials is presented. The antenna operates over the wireless network bands at 2.45 Hz and 5 GHz. An electromagnetic band gap surface is used to reduce back radiation by 10 to 15 dB while maintaining the impedance match over the two frequency bands. Coupling between antennas is significantly reduced making it ideal for body worn communication systems.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"2 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":"132326384","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: 29
Proposal for a novel near-field antenna measurement technique employing a conic frustum geometry 一种采用圆锥锥几何的新型近场天线测量技术的提出
2008 Loughborough Antennas and Propagation Conference Pub Date : 2008-03-17 DOI: 10.1109/LAPC.2008.4516877
S. Gregson, C. Parini, J. McCormick
{"title":"Proposal for a novel near-field antenna measurement technique employing a conic frustum geometry","authors":"S. Gregson, C. Parini, J. McCormick","doi":"10.1109/LAPC.2008.4516877","DOIUrl":"https://doi.org/10.1109/LAPC.2008.4516877","url":null,"abstract":"A technique for the prediction of far-field antenna patterns from data obtained from modified plane-polar near- field measurement system is proposed. This technique utilises a simple change in facility alignment to enable near-field data to be taken over the surface of a conceptual right conic frustum. In this way, existing planar facilities can be modified so that they are able to characterise the wide angle antenna performance in situations where hitherto they would have been limited by truncation. Furthermore, this system offers a cost effective solution to the characterisation of a class of antenna that currently can only be effectively served with spherical near-field scanning. This paper presents the measurement technique, proposes the probe corrected transformation algorithm and presents preliminary results before outlining the future work.","PeriodicalId":428426,"journal":{"name":"2008 Loughborough Antennas and Propagation Conference","volume":"27 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":"130042520","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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