Pub Date : 2016-06-02DOI: 10.1109/EUCAP.2016.7481959
S. López-Soriano, J. Parrón
New applications for passive UHF RFID systems, such as tagging small and expensive metal objects, impose strict requirements on the size of the tag antenna and the read range of the system. Thus, miniaturized tags that achieve read ranges of several meters are of major interest for these applications. In this contribution, the design of a small antenna to tag metallic items is presented. It achieves a maximum read range of 13.3 meters and its dimensions are 14.3 × 25 × 3 mm3. The proposed design consists in a short-ended parallel plate. It is mounted on a ceramic substrate to obtain the required miniaturization. A comparison with the smallest tag designs found in the literature will be also carried out.
{"title":"Parallel plate antenna for UHF RFID tags operating over metallic objects","authors":"S. López-Soriano, J. Parrón","doi":"10.1109/EUCAP.2016.7481959","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481959","url":null,"abstract":"New applications for passive UHF RFID systems, such as tagging small and expensive metal objects, impose strict requirements on the size of the tag antenna and the read range of the system. Thus, miniaturized tags that achieve read ranges of several meters are of major interest for these applications. In this contribution, the design of a small antenna to tag metallic items is presented. It achieves a maximum read range of 13.3 meters and its dimensions are 14.3 × 25 × 3 mm3. The proposed design consists in a short-ended parallel plate. It is mounted on a ceramic substrate to obtain the required miniaturization. A comparison with the smallest tag designs found in the literature will be also carried out.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"7 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2016-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87995155","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 : 2016-06-02DOI: 10.1109/EUCAP.2016.7481254
E. Alwan, D. Papantonis, Markus H. Novak, A. Akhiyat, B. Dupaix, W. Khalil, J. Volakis
In this paper, we present a millimeter wave system that combines several innovations to enable practical use of the yet unharnessed capacity of the millimeter spectrum for high speed and secure wireless connectivity. Essential to its realization is a novel ultra-wideband array that incorporates suitable balanced feeds. Also, unique bandwidth reconfiguration technique is presented via simple tuning of the balanced feed behind antenna elements to null sensitive RF bands. Finally, a broadband beamforming is proposed with reduced power requirements using a much smaller number of analog-to-digital converters and on-site code division multiplexing technique.
{"title":"Reduced-power millimeter-wave reconfigurable systems","authors":"E. Alwan, D. Papantonis, Markus H. Novak, A. Akhiyat, B. Dupaix, W. Khalil, J. Volakis","doi":"10.1109/EUCAP.2016.7481254","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481254","url":null,"abstract":"In this paper, we present a millimeter wave system that combines several innovations to enable practical use of the yet unharnessed capacity of the millimeter spectrum for high speed and secure wireless connectivity. Essential to its realization is a novel ultra-wideband array that incorporates suitable balanced feeds. Also, unique bandwidth reconfiguration technique is presented via simple tuning of the balanced feed behind antenna elements to null sensitive RF bands. Finally, a broadband beamforming is proposed with reduced power requirements using a much smaller number of analog-to-digital converters and on-site code division multiplexing technique.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"7 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2016-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80225311","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 : 2016-06-02DOI: 10.1109/EUCAP.2016.7481363
P. Thorvaldsen, C. Bernhoft, I. Henne
This paper presents the results from a field trial that was performed during a three-year period on a 11.1 km long radio link path operating at 26 GHz in Bergen, Norway. The purpose was to investigate the amount of attenuation due to precipitation, especially rain and wet snow, and its yearly variations. The attenuation of the radio link signal was measured. The measured attenuation results are compared to the models given by the International Telecommunication Union (ITU). The predominant cause of fading was rain and wet snow. The fading due to combined rain and wet snow is underestimated by ITU-R 530-15 [1]. Also measurements of fading speed, fade duration, number of fades and polarization correlation are presented.
{"title":"Outdoor transmission measurement at 26 GHz; Results of a 3 years trial in Norway","authors":"P. Thorvaldsen, C. Bernhoft, I. Henne","doi":"10.1109/EUCAP.2016.7481363","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481363","url":null,"abstract":"This paper presents the results from a field trial that was performed during a three-year period on a 11.1 km long radio link path operating at 26 GHz in Bergen, Norway. The purpose was to investigate the amount of attenuation due to precipitation, especially rain and wet snow, and its yearly variations. The attenuation of the radio link signal was measured. The measured attenuation results are compared to the models given by the International Telecommunication Union (ITU). The predominant cause of fading was rain and wet snow. The fading due to combined rain and wet snow is underestimated by ITU-R 530-15 [1]. Also measurements of fading speed, fade duration, number of fades and polarization correlation are presented.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"51 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91121422","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 : 2016-06-02DOI: 10.1109/EUCAP.2016.7481694
O. Borries, E. Jørgensen, P. Meincke, H. Viskum
The challenges related to the increasing physical size of satellite platforms carry over to a number of related areas, including the design of Compact Antenna Test Ranges (CATRs) capable of handling such structures. In the present paper, we consider the design of a large CATR and use state-of-the-art Computational Electromagnetics (CEM) software, based on full-wave methods to fully include the important diffraction effects, to perform various parameter studies and ultimately allow full-scale optimization of a CATR.
{"title":"Full-wave optimization of large Compact Antenna Test Ranges","authors":"O. Borries, E. Jørgensen, P. Meincke, H. Viskum","doi":"10.1109/EUCAP.2016.7481694","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481694","url":null,"abstract":"The challenges related to the increasing physical size of satellite platforms carry over to a number of related areas, including the design of Compact Antenna Test Ranges (CATRs) capable of handling such structures. In the present paper, we consider the design of a large CATR and use state-of-the-art Computational Electromagnetics (CEM) software, based on full-wave methods to fully include the important diffraction effects, to perform various parameter studies and ultimately allow full-scale optimization of a CATR.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"45 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90925189","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 : 2016-06-02DOI: 10.1109/EUCAP.2016.7481666
M. Kozlov, P.-L. Bazin, H. Moller, N. Weiskopf
We investigated how cerebrospinal fluid (CSF) simulated as a single electrically connected object and variation of the geometry of an anatomical human head model influence the transmit and safety excitation efficiencies of a 7T magnetic resonance imaging transmit array. A dual-row array was excited in circularly polarized (CP) and radiofrequency (RF) shimming modes. In both excitation modes, CSF partially shielded the brain from the array RF field. It resulted in decreases of both transmit and safety excitation efficiencies. A smaller head size resulted in larger transmit and safety excitation efficiencies for the CP excitation mode.
{"title":"Influence of cerebrospinal fluid on specific absorption rate generated by 300 MHz MRI transmit array","authors":"M. Kozlov, P.-L. Bazin, H. Moller, N. Weiskopf","doi":"10.1109/EUCAP.2016.7481666","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481666","url":null,"abstract":"We investigated how cerebrospinal fluid (CSF) simulated as a single electrically connected object and variation of the geometry of an anatomical human head model influence the transmit and safety excitation efficiencies of a 7T magnetic resonance imaging transmit array. A dual-row array was excited in circularly polarized (CP) and radiofrequency (RF) shimming modes. In both excitation modes, CSF partially shielded the brain from the array RF field. It resulted in decreases of both transmit and safety excitation efficiencies. A smaller head size resulted in larger transmit and safety excitation efficiencies for the CP excitation mode.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"64 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77722005","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 : 2016-06-02DOI: 10.1109/EUCAP.2016.7482011
L. Pajewski, A. Giannopoulos, S. Lambot, M. Marciniak, S. Meschino, N. Pinel, M. Sbartai, C. Warren
This work aims at offering an overview on the scientific results stemming from a selection of Short-Term Scientific Missions (STSMs) funded by the COST (European COoperation in Science and Technology) Action TU1208 “Civil Engineering Applications of Ground Penetrating Radar” and dealing with the development of electromagnetic modelling and inversion techniques for Ground Penetrating Radar applications. STSMs are important means to develop linkages and scientific collaborations between participating institutions involved in a COST Action. Scientists have the possibility to go to an institution abroad, in order to undertake joint research and share experience, techniques, equipment and infrastructures that may not be available in their own institution.
{"title":"Short-Term Scientific Missions on electromagnetic modelling and inversion techniques for Ground Penetrating Radar - COST Action TU1208","authors":"L. Pajewski, A. Giannopoulos, S. Lambot, M. Marciniak, S. Meschino, N. Pinel, M. Sbartai, C. Warren","doi":"10.1109/EUCAP.2016.7482011","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7482011","url":null,"abstract":"This work aims at offering an overview on the scientific results stemming from a selection of Short-Term Scientific Missions (STSMs) funded by the COST (European COoperation in Science and Technology) Action TU1208 “Civil Engineering Applications of Ground Penetrating Radar” and dealing with the development of electromagnetic modelling and inversion techniques for Ground Penetrating Radar applications. STSMs are important means to develop linkages and scientific collaborations between participating institutions involved in a COST Action. Scientists have the possibility to go to an institution abroad, in order to undertake joint research and share experience, techniques, equipment and infrastructures that may not be available in their own institution.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"59 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91196315","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 : 2016-06-02DOI: 10.1109/EUCAP.2016.7481918
P. Gentner, Susanne Kurschner, M. Sampl, Robert Kinker
In this publication the impact of the dipole size and its groundplane on the half power beamwidth of a dual polarized dipole is analyzed in detail. The frequency band of observation is from 1700MHz to 2700 MHz, covering the UMTS and LTE communication bands. This bandwidth is chosen to show the broadband effects on the scattering parameters as well as on the radiation patterns. For the radiation behavior the focus is on the differences between a constant and a frequency dependent half power beamwidth. Finally these two cases are compared in a MIMO beamforming scenario.
{"title":"On the beamwidth of a dual polarized dipole above a finite groundplane","authors":"P. Gentner, Susanne Kurschner, M. Sampl, Robert Kinker","doi":"10.1109/EUCAP.2016.7481918","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481918","url":null,"abstract":"In this publication the impact of the dipole size and its groundplane on the half power beamwidth of a dual polarized dipole is analyzed in detail. The frequency band of observation is from 1700MHz to 2700 MHz, covering the UMTS and LTE communication bands. This bandwidth is chosen to show the broadband effects on the scattering parameters as well as on the radiation patterns. For the radiation behavior the focus is on the differences between a constant and a frequency dependent half power beamwidth. Finally these two cases are compared in a MIMO beamforming scenario.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"31 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2016-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86812208","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 : 2016-06-02DOI: 10.1109/EUCAP.2016.7481391
Jinlin Liu, A. Zaman, P. Kildal
Currently the inverted microstrip gap waveguide has been considered as a promising technology for millimeter wave wireless applications. Theoretically, the new structure may be considered as a two layer shielded structure where the bottom layer consists of an array of periodic metallic pins which works as an artificial magnetic conductor (AMC). However, it is difficult to evaluate electromagnetic properties and performance of the new waveguide by using traditional waveguide ports or discrete ports in available full-wave simulator. In order to solve the problem, this paper proposes an effective method to determine dimensions of traditional waveguide ports in existing commercial full wave simulator to be used while simulating the inverted microstrip gap waveguide structures. The procedure includes the analysis of quasi-TEM mode of the inverted microstrip gap waveguide and the corresponding size of the waveguide port, as well as the location and boundary conditions used in the simulation software. The numerical port proposed in this work is much better than the ports used previously.
{"title":"Optimizing the numerical port for inverted microstrip gap waveguide in full-wave simulators","authors":"Jinlin Liu, A. Zaman, P. Kildal","doi":"10.1109/EUCAP.2016.7481391","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481391","url":null,"abstract":"Currently the inverted microstrip gap waveguide has been considered as a promising technology for millimeter wave wireless applications. Theoretically, the new structure may be considered as a two layer shielded structure where the bottom layer consists of an array of periodic metallic pins which works as an artificial magnetic conductor (AMC). However, it is difficult to evaluate electromagnetic properties and performance of the new waveguide by using traditional waveguide ports or discrete ports in available full-wave simulator. In order to solve the problem, this paper proposes an effective method to determine dimensions of traditional waveguide ports in existing commercial full wave simulator to be used while simulating the inverted microstrip gap waveguide structures. The procedure includes the analysis of quasi-TEM mode of the inverted microstrip gap waveguide and the corresponding size of the waveguide port, as well as the location and boundary conditions used in the simulation software. The numerical port proposed in this work is much better than the ports used previously.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"220 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73814336","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 : 2016-06-02DOI: 10.1109/EUCAP.2016.7481717
M. Ambrosanio, Panagiotis Kosmasy, V. Pascazio
Microwave Imaging represents a potential, interesting modality for a great variety of applications in different fields, not only for its capability to detect unknown targets in a non-destructive fashion, but also for the quantitative characterization of such scatterers. In medical imaging applications, the illposedness and non-linearity of the electromagnetic (EM) inverse problem still represents a big challenge before moving to clinical trials. This paper applies a novel thresholding algorithm to the linear inversion at each iteration of the Distorted Born Iterative Method (DBIM), which is amongst the most popular algorithms that deal with the EM nonlinear problem. This approach is computationally tractable and represents a good trade-off between low computational burden and image accuracy.
{"title":"An adaptive multi-threshold iterative shrinkage algorithm for microwave imaging applications","authors":"M. Ambrosanio, Panagiotis Kosmasy, V. Pascazio","doi":"10.1109/EUCAP.2016.7481717","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481717","url":null,"abstract":"Microwave Imaging represents a potential, interesting modality for a great variety of applications in different fields, not only for its capability to detect unknown targets in a non-destructive fashion, but also for the quantitative characterization of such scatterers. In medical imaging applications, the illposedness and non-linearity of the electromagnetic (EM) inverse problem still represents a big challenge before moving to clinical trials. This paper applies a novel thresholding algorithm to the linear inversion at each iteration of the Distorted Born Iterative Method (DBIM), which is amongst the most popular algorithms that deal with the EM nonlinear problem. This approach is computationally tractable and represents a good trade-off between low computational burden and image accuracy.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"66 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2016-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80219846","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 : 2016-06-02DOI: 10.1109/EUCAP.2016.7481342
N. Zainal, M. Kamarudin, Y. Yamada, N. Seman, M. Khalily, M. Jusoh
Unequally spaced arrays technique offers an alternative for limited sidelobe level reduction compared to conventional array antennas with equally spaced elements. In this paper, the abilities and design of microstrip linear array antenna, fed by multiport feeding with uniform excitation coefficient in all array elements are presented for sidelobe level reduction at 28 GHz. By using the proximity coupled feed, simulation result gave -10 dB impedance bandwidth of 1.42 GHz and reflection coefficient of -35.5 dB has been achieved. The sidelobe level at broadside decreased from -11.77 dB to -14.76 dB (N = 4) and -12.77 dB to -15.98 dB (N = 8) with unequally spaced array. This feature is suitable for 5G applications.
与具有等间距单元的传统阵列天线相比，非等间距阵列技术为有限的旁瓣电平降低提供了一种替代方案。本文介绍了采用多端口馈电、各阵元激励系数均匀馈电的微带线阵天线在28ghz下降低旁瓣电平的能力和设计。采用接近耦合馈电，仿真结果表明-10 dB阻抗带宽为1.42 GHz，反射系数为-35.5 dB。等间距阵列下，宽侧旁瓣电平从-11.77 dB降至-14.76 dB (N = 4)，从-12.77 dB降至-15.98 dB (N = 8)。该特性适用于5G应用。
{"title":"Sidelobe reduction of unequally spaced arrays for 5G applications","authors":"N. Zainal, M. Kamarudin, Y. Yamada, N. Seman, M. Khalily, M. Jusoh","doi":"10.1109/EUCAP.2016.7481342","DOIUrl":"https://doi.org/10.1109/EUCAP.2016.7481342","url":null,"abstract":"Unequally spaced arrays technique offers an alternative for limited sidelobe level reduction compared to conventional array antennas with equally spaced elements. In this paper, the abilities and design of microstrip linear array antenna, fed by multiport feeding with uniform excitation coefficient in all array elements are presented for sidelobe level reduction at 28 GHz. By using the proximity coupled feed, simulation result gave -10 dB impedance bandwidth of 1.42 GHz and reflection coefficient of -35.5 dB has been achieved. The sidelobe level at broadside decreased from -11.77 dB to -14.76 dB (N = 4) and -12.77 dB to -15.98 dB (N = 8) with unequally spaced array. This feature is suitable for 5G applications.","PeriodicalId":6509,"journal":{"name":"2016 10th European Conference on Antennas and Propagation (EuCAP)","volume":"94 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2016-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78681736","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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