Pub Date : 2014-04-06DOI: 10.1109/EUCAP.2014.6902408
S. Alja'afreh, Yi Huang, Lei Xing
A new wideband, very low profile (3 mm), PIFA antenna is proposed. It utilizes two collinear feeds, ground plane slots and modified top radiating plate to reduce the mutual coupling between the feeds and improve the impedance matching. The proposed antenna has a 10-dB impedance bandwidth from 2.25 to 3.2 GHz or a fractional bandwidth of 35 %. It covers several important wireless applications such as 2.4 GHz WLAN, bluetooth, four LTE bands (bands 7, 38, 40 and 41) and S-DMB band 2.63-2.655 GHz. Both simulated and measured results are presented to quantify and validate the antenna performance. It is demonstrated that this new antenna is an excellent candidate for mobile diversity/MIMO applications.
{"title":"A new dual feed PIFA diversity antenna","authors":"S. Alja'afreh, Yi Huang, Lei Xing","doi":"10.1109/EUCAP.2014.6902408","DOIUrl":"https://doi.org/10.1109/EUCAP.2014.6902408","url":null,"abstract":"A new wideband, very low profile (3 mm), PIFA antenna is proposed. It utilizes two collinear feeds, ground plane slots and modified top radiating plate to reduce the mutual coupling between the feeds and improve the impedance matching. The proposed antenna has a 10-dB impedance bandwidth from 2.25 to 3.2 GHz or a fractional bandwidth of 35 %. It covers several important wireless applications such as 2.4 GHz WLAN, bluetooth, four LTE bands (bands 7, 38, 40 and 41) and S-DMB band 2.63-2.655 GHz. Both simulated and measured results are presented to quantify and validate the antenna performance. It is demonstrated that this new antenna is an excellent candidate for mobile diversity/MIMO applications.","PeriodicalId":22362,"journal":{"name":"The 8th European Conference on Antennas and Propagation (EuCAP 2014)","volume":"45 1","pages":"2800-2803"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80019652","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.2014.6902018
A. Sellier, T. V. Teperik, A. de Lustrac
The resonant absorption in an ultrathin metamaterial is studied theoretically. We present a simple physical model describing this phenomenon based on equivalent resonant circuits. We discuss the role of radiative and dissipative damping of resonant mode supported by the metamaterial in the formation of absorption spectra. We show that the results of rigorous calculations of Maxwell equations can be fully retrieved with this simple model. This model allows us to explain the total absorption effect observed in the system on a common physical ground by referring it to the impedance matching condition at the resonance.
{"title":"Modeling of metamaterial absorber by equivalent resonant circuit","authors":"A. Sellier, T. V. Teperik, A. de Lustrac","doi":"10.1109/EUCAP.2014.6902018","DOIUrl":"https://doi.org/10.1109/EUCAP.2014.6902018","url":null,"abstract":"The resonant absorption in an ultrathin metamaterial is studied theoretically. We present a simple physical model describing this phenomenon based on equivalent resonant circuits. We discuss the role of radiative and dissipative damping of resonant mode supported by the metamaterial in the formation of absorption spectra. We show that the results of rigorous calculations of Maxwell equations can be fully retrieved with this simple model. This model allows us to explain the total absorption effect observed in the system on a common physical ground by referring it to the impedance matching condition at the resonance.","PeriodicalId":22362,"journal":{"name":"The 8th European Conference on Antennas and Propagation (EuCAP 2014)","volume":"35 1","pages":"1311-1314"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79015594","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.2014.6902571
A. Kiourti, Zheyu Wang, Cedric W. L. Lee, H. Scwerdt, J. Chae, J. Volakis
We propose a wireless, fully-passive neurosensing system for remote monitoring of brain signals. The system comprises a neurosensor, an implanted antenna matched to the sensor, an external RF interrogator antenna, and integrated RF circuits. To enable continuous and reliable sensor monitoring using a nearby mobile device (cell phone, tablet, etc), the neurosensing system is further interfaced with a wearable body area network (BAN). Design and link budget issues are discussed, highlighting the challenges of detecting actual electrocorticographic (ECoG) signals of tens of μVpp.
{"title":"A wireless neurosensing system for remote monitoring of brain signals","authors":"A. Kiourti, Zheyu Wang, Cedric W. L. Lee, H. Scwerdt, J. Chae, J. Volakis","doi":"10.1109/EUCAP.2014.6902571","DOIUrl":"https://doi.org/10.1109/EUCAP.2014.6902571","url":null,"abstract":"We propose a wireless, fully-passive neurosensing system for remote monitoring of brain signals. The system comprises a neurosensor, an implanted antenna matched to the sensor, an external RF interrogator antenna, and integrated RF circuits. To enable continuous and reliable sensor monitoring using a nearby mobile device (cell phone, tablet, etc), the neurosensing system is further interfaced with a wearable body area network (BAN). Design and link budget issues are discussed, highlighting the challenges of detecting actual electrocorticographic (ECoG) signals of tens of μVpp.","PeriodicalId":22362,"journal":{"name":"The 8th European Conference on Antennas and Propagation (EuCAP 2014)","volume":"19 1","pages":"3452-3453"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79123462","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.2014.6902492
G. Caille, E. Girard
We review 4 different methods to build non-regular arrays, optimised to generate reconfigurable multi-beam coverages from telecommunication satellites: thinning/starting from a regular lattice and gathering radiating elements into subarrays with various sizes and shapes/aperiodic lattice (daisy or sunflower like)/overlapped subarrays. For each method we present the main advantages and drawbacks, when compared to a classical array with a regular lattice; our criteria are the amount of decrease in the number of active chains, for similar directivity and isolation performances, and the industrial feasibility. More detailed results, justifying the conclusions, will be presented at the EuCAP 2014 conference.
{"title":"Non-regular array solutions assessed from industrial point of view","authors":"G. Caille, E. Girard","doi":"10.1109/EUCAP.2014.6902492","DOIUrl":"https://doi.org/10.1109/EUCAP.2014.6902492","url":null,"abstract":"We review 4 different methods to build non-regular arrays, optimised to generate reconfigurable multi-beam coverages from telecommunication satellites: thinning/starting from a regular lattice and gathering radiating elements into subarrays with various sizes and shapes/aperiodic lattice (daisy or sunflower like)/overlapped subarrays. For each method we present the main advantages and drawbacks, when compared to a classical array with a regular lattice; our criteria are the amount of decrease in the number of active chains, for similar directivity and isolation performances, and the industrial feasibility. More detailed results, justifying the conclusions, will be presented at the EuCAP 2014 conference.","PeriodicalId":22362,"journal":{"name":"The 8th European Conference on Antennas and Propagation (EuCAP 2014)","volume":"47 1","pages":"3137-3141"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79162350","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.2014.6902347
A. Pal, A. Mehta, D. Mirshekar-Syahkal
A low profile dual-band switched beam Square Loop Antenna (SLA) with capacitively coupled feeds is presented. Two co-centered square loops are capacitively coupled to the four vertical feeding probes by four rectangular feeding patches. The capacitively coupled feeding mechanism introduces capacitance into the antenna input impedance and cancels the high inductance due to the feeding probe and the close proximity of the ground plane. This feeding technique allows the antenna to be matched to a 50 ohm feed line and helps in the realization of a low profile SLA. The antenna has a height of 6 mm and it is developed for operating in 3.1 GHz and 3.8 GHz frequency bands. In both frequency bands when any of the four ports is excited, keeping other ports open circuited, the antenna generates a radiation beam tilted by 31 degrees from the broadside and directed away from the excited port, having a maximum directivity of 9.1 dBi. Thus by exciting one port at a time, the antenna can steer its tilted beam in four different quadrants to scan the entire space in front of antenna.
{"title":"Dual band low-profile switched beam Square Loop Antenna with capacitively coupled feeds","authors":"A. Pal, A. Mehta, D. Mirshekar-Syahkal","doi":"10.1109/EUCAP.2014.6902347","DOIUrl":"https://doi.org/10.1109/EUCAP.2014.6902347","url":null,"abstract":"A low profile dual-band switched beam Square Loop Antenna (SLA) with capacitively coupled feeds is presented. Two co-centered square loops are capacitively coupled to the four vertical feeding probes by four rectangular feeding patches. The capacitively coupled feeding mechanism introduces capacitance into the antenna input impedance and cancels the high inductance due to the feeding probe and the close proximity of the ground plane. This feeding technique allows the antenna to be matched to a 50 ohm feed line and helps in the realization of a low profile SLA. The antenna has a height of 6 mm and it is developed for operating in 3.1 GHz and 3.8 GHz frequency bands. In both frequency bands when any of the four ports is excited, keeping other ports open circuited, the antenna generates a radiation beam tilted by 31 degrees from the broadside and directed away from the excited port, having a maximum directivity of 9.1 dBi. Thus by exciting one port at a time, the antenna can steer its tilted beam in four different quadrants to scan the entire space in front of antenna.","PeriodicalId":22362,"journal":{"name":"The 8th European Conference on Antennas and Propagation (EuCAP 2014)","volume":"38 1","pages":"2578-2582"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79341443","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.2014.6901825
Robert Henry, M. Okoniewski
A new half-mode substrate integrated waveguide fed periodic leaky wave antenna is presented. Antipodal tapered slots are used as periodic radiators tapping off the open sidewall of the waveguide. Broadside radiation is enabled by the addition of a matching section to the unit cell. Design techniques are outlined as well as prototype simulations and measurements. The prototype antenna gain is greater than 10dB over an 86° scan range and a 30% bandwidth.
{"title":"A new half mode substrate integrated waveguide leaky wave antenna","authors":"Robert Henry, M. Okoniewski","doi":"10.1109/EUCAP.2014.6901825","DOIUrl":"https://doi.org/10.1109/EUCAP.2014.6901825","url":null,"abstract":"A new half-mode substrate integrated waveguide fed periodic leaky wave antenna is presented. Antipodal tapered slots are used as periodic radiators tapping off the open sidewall of the waveguide. Broadside radiation is enabled by the addition of a matching section to the unit cell. Design techniques are outlined as well as prototype simulations and measurements. The prototype antenna gain is greater than 10dB over an 86° scan range and a 30% bandwidth.","PeriodicalId":22362,"journal":{"name":"The 8th European Conference on Antennas and Propagation (EuCAP 2014)","volume":"213 1","pages":"586-589"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79479833","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.2014.6902065
F. D’Agostino, F. Ferrara, C. Gennarelli, R. Guerriero, M. Migliozzi
In this communication, an efficient approach to compensate known positioning errors in a near-field - far-field (NF-FF) transformation with spherical scanning for quasi-planar antennas is experimentally validated. Such an approach is based on a nonredundant sampling representation of the voltage measured by the probe, obtained by assuming the antenna under test as enclosed in an oblate ellipsoid, a modelling particularly suitable for dealing with quasi-planar radiating sources. It employs the singular value decomposition method to retrieve the nonredundant NF data at the points fixed by the sampling representation from the acquired irregularly distributed ones. These last are assumed lying on nonuniform parallels so that the two-dimensional problem is reduced to the solution of two independent one-dimensional ones. The NF data needed to carry out the classical spherical NF-FF transformation are then efficiently evaluated from the nonredundant NF data by using an optimal sampling interpolation algorithm. Experimental tests, performed at the Antenna Characterization Lab of the University of Salerno and assessing the effectiveness of the technique, are shown.
{"title":"Far field reconstruction from positioning error affected near-field data acquired via a nonredundant spherical scanning","authors":"F. D’Agostino, F. Ferrara, C. Gennarelli, R. Guerriero, M. Migliozzi","doi":"10.1109/EUCAP.2014.6902065","DOIUrl":"https://doi.org/10.1109/EUCAP.2014.6902065","url":null,"abstract":"In this communication, an efficient approach to compensate known positioning errors in a near-field - far-field (NF-FF) transformation with spherical scanning for quasi-planar antennas is experimentally validated. Such an approach is based on a nonredundant sampling representation of the voltage measured by the probe, obtained by assuming the antenna under test as enclosed in an oblate ellipsoid, a modelling particularly suitable for dealing with quasi-planar radiating sources. It employs the singular value decomposition method to retrieve the nonredundant NF data at the points fixed by the sampling representation from the acquired irregularly distributed ones. These last are assumed lying on nonuniform parallels so that the two-dimensional problem is reduced to the solution of two independent one-dimensional ones. The NF data needed to carry out the classical spherical NF-FF transformation are then efficiently evaluated from the nonredundant NF data by using an optimal sampling interpolation algorithm. Experimental tests, performed at the Antenna Characterization Lab of the University of Salerno and assessing the effectiveness of the technique, are shown.","PeriodicalId":22362,"journal":{"name":"The 8th European Conference on Antennas and Propagation (EuCAP 2014)","volume":"5 1","pages":"1493-1497"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84945769","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.2014.6902369
J. Guerrieri, J. Coder, M. Francis, J. Gordon, D. Novotny, R. Wittmann
International comparison of antenna measurement results between national measurement laboratories supports interoperability of communication equipment in today's world market. The National Institute of Standards and Technology (NIST) is the pilot National Measurement Institute (NMI) for an international comparison measurement of two Ku-band standard gain horn antennas that involved eleven other NMIs. A variety of measurement techniques such as extrapolation, far field, gain transfer and reciprocity, were used in this international comparison. The individual measurement techniques used by each NMI are indicated and the gain measurement results and associated uncertainties from each NMI are presented in this paper.
{"title":"International comparison of Ku-band standard gain horn characterization","authors":"J. Guerrieri, J. Coder, M. Francis, J. Gordon, D. Novotny, R. Wittmann","doi":"10.1109/EUCAP.2014.6902369","DOIUrl":"https://doi.org/10.1109/EUCAP.2014.6902369","url":null,"abstract":"International comparison of antenna measurement results between national measurement laboratories supports interoperability of communication equipment in today's world market. The National Institute of Standards and Technology (NIST) is the pilot National Measurement Institute (NMI) for an international comparison measurement of two Ku-band standard gain horn antennas that involved eleven other NMIs. A variety of measurement techniques such as extrapolation, far field, gain transfer and reciprocity, were used in this international comparison. The individual measurement techniques used by each NMI are indicated and the gain measurement results and associated uncertainties from each NMI are presented in this paper.","PeriodicalId":22362,"journal":{"name":"The 8th European Conference on Antennas and Propagation (EuCAP 2014)","volume":"73 1","pages":"2653-2654"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85740181","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.2014.6901719
H. Fenech, S. Amos, A. Tomatis, J. S. Merino, V. Soumpholphakdy
As demand for capacity increases, so must technology evolve in order to meet such demands. HTS systems have enabled operators to significantly enhance performance and with KA-SAT entering service in 2011 Eutelsat was at the forefront of this new generation of HTS systems. However, such systems are not all the same, and in order to provide flexibility not only in service, but in the mission payloads, the antenna technology behind HTS systems can be quite different. This paper examines the upcoming HTS systems that will enter Eutelsat's fleet as they continue to evolve and adapt their missions to support a variety of applications.
{"title":"The many guises of HTS antennas","authors":"H. Fenech, S. Amos, A. Tomatis, J. S. Merino, V. Soumpholphakdy","doi":"10.1109/EUCAP.2014.6901719","DOIUrl":"https://doi.org/10.1109/EUCAP.2014.6901719","url":null,"abstract":"As demand for capacity increases, so must technology evolve in order to meet such demands. HTS systems have enabled operators to significantly enhance performance and with KA-SAT entering service in 2011 Eutelsat was at the forefront of this new generation of HTS systems. However, such systems are not all the same, and in order to provide flexibility not only in service, but in the mission payloads, the antenna technology behind HTS systems can be quite different. This paper examines the upcoming HTS systems that will enter Eutelsat's fleet as they continue to evolve and adapt their missions to support a variety of applications.","PeriodicalId":22362,"journal":{"name":"The 8th European Conference on Antennas and Propagation (EuCAP 2014)","volume":"44 1","pages":"171-174"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85992980","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.2014.6901887
R. Muller, R. Herrmann, D. Dupleich, C. Schneider, R. Thoma
Owing to the increasing data rates, future 5G mobile networks will need to operate at higher frequencies and bandwidths. To investigate new techniques for those networks, channel sounding is essential for measuring and analysing the multipath propagation in single and multi-user situations under time-variant shadowing environments. This requires a challenging design of the millimeter-wave (mm-wave) channel sounder (CS) - it must provide ultra-wideband (UWB) real-time operation with multiple antennas and a high dynamic range. In addition, polarimetric information is needed to fully characterise the wireless channel, e.g. for cases of polarisation misalignment at the mobile device. This paper presents a novel UWB dual-polarised mm-wave channel sounder architecture for real time measurements in 5G mobile networks and motivates the need for polarimetric measurements with experimental data collected at 60 GHz.
{"title":"Ultrawideband multichannel sounding for mm-wave","authors":"R. Muller, R. Herrmann, D. Dupleich, C. Schneider, R. Thoma","doi":"10.1109/EUCAP.2014.6901887","DOIUrl":"https://doi.org/10.1109/EUCAP.2014.6901887","url":null,"abstract":"Owing to the increasing data rates, future 5G mobile networks will need to operate at higher frequencies and bandwidths. To investigate new techniques for those networks, channel sounding is essential for measuring and analysing the multipath propagation in single and multi-user situations under time-variant shadowing environments. This requires a challenging design of the millimeter-wave (mm-wave) channel sounder (CS) - it must provide ultra-wideband (UWB) real-time operation with multiple antennas and a high dynamic range. In addition, polarimetric information is needed to fully characterise the wireless channel, e.g. for cases of polarisation misalignment at the mobile device. This paper presents a novel UWB dual-polarised mm-wave channel sounder architecture for real time measurements in 5G mobile networks and motivates the need for polarimetric measurements with experimental data collected at 60 GHz.","PeriodicalId":22362,"journal":{"name":"The 8th European Conference on Antennas and Propagation (EuCAP 2014)","volume":"4 1","pages":"817-821"},"PeriodicalIF":0.0,"publicationDate":"2014-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76972544","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}
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