Pub Date : 2014-07-06DOI: 10.1109/APS.2014.6905019
M. A. Echeverri Bautista, F. Vipiana, G. Vecchi, M. Francavilla
A Non overlapping Domain Decomposition (DDM) strategy is proposed, to solve the ill-conditioning in multi-scale PEC structures. The considered scheme uses the Discontinuous Galerkin (DG) formulation, avoiding artificial surfaces between the decomposed domains; furthermore, the proposed DDM can be applied to open structures straightly. The convergence of the algorithm is accelerated through the enhancement of the transmission conditions in the cutting contours separating the domains.
{"title":"Non overlapping Domain Decomposition based on Discontinuous Galerkin and enhanced transmission conditions for multi-scale structures","authors":"M. A. Echeverri Bautista, F. Vipiana, G. Vecchi, M. Francavilla","doi":"10.1109/APS.2014.6905019","DOIUrl":"https://doi.org/10.1109/APS.2014.6905019","url":null,"abstract":"A Non overlapping Domain Decomposition (DDM) strategy is proposed, to solve the ill-conditioning in multi-scale PEC structures. The considered scheme uses the Discontinuous Galerkin (DG) formulation, avoiding artificial surfaces between the decomposed domains; furthermore, the proposed DDM can be applied to open structures straightly. The convergence of the algorithm is accelerated through the enhancement of the transmission conditions in the cutting contours separating the domains.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"7 1","pages":"1387-1388"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81556751","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 : 2014-07-06DOI: 10.1109/APS.2014.6904449
S. Raut, A. Petosa
A six-element compact array of wideband printed bowtie antennas is designed for mobile spectrum monitoring applications covering 2-6 GHz. Each element in the array is designed to cover a 60° azimuth sector with minimal beam-width variation over the frequency band. Simulated beam patterns and return loss performance is provided.
{"title":"Wideband printed bowtie array for spectrum monitoring","authors":"S. Raut, A. Petosa","doi":"10.1109/APS.2014.6904449","DOIUrl":"https://doi.org/10.1109/APS.2014.6904449","url":null,"abstract":"A six-element compact array of wideband printed bowtie antennas is designed for mobile spectrum monitoring applications covering 2-6 GHz. Each element in the array is designed to cover a 60° azimuth sector with minimal beam-width variation over the frequency band. Simulated beam patterns and return loss performance is provided.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"11 1","pages":"235-236"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81578381","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 : 2014-07-06DOI: 10.1109/APS.2014.6904750
H. Alroughani, J. Ethier, D. McNamara
Some computational aspects for the characteristic modes (CM) of dielectric objects are examined. Volume integral equation (VIE) formulations are reliable but computationally burdensome. The use of surface integral equation (SIE) formulations results in a lighter computational load but, we show here, obtrudes certain non-physical modes in addition to the physical ones. We show that the non-physical ones are easily identified using a radiated power check, and can be discarded, so allowing use of the SIE for finding the true CMs of dielectric objects. The SIE can be used with fine meshing with relatively modest computational resources; this is of practical importance.
{"title":"Observations on computational outcomes for the characteristic modes of dielectric objects","authors":"H. Alroughani, J. Ethier, D. McNamara","doi":"10.1109/APS.2014.6904750","DOIUrl":"https://doi.org/10.1109/APS.2014.6904750","url":null,"abstract":"Some computational aspects for the characteristic modes (CM) of dielectric objects are examined. Volume integral equation (VIE) formulations are reliable but computationally burdensome. The use of surface integral equation (SIE) formulations results in a lighter computational load but, we show here, obtrudes certain non-physical modes in addition to the physical ones. We show that the non-physical ones are easily identified using a radiated power check, and can be discarded, so allowing use of the SIE for finding the true CMs of dielectric objects. The SIE can be used with fine meshing with relatively modest computational resources; this is of practical importance.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"23 1","pages":"844-845"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81832585","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 : 2014-07-06DOI: 10.1109/APS.2014.6904728
Min Zhou, S. Sorensen
The design and optimization of a single-layer multi-faceted dual-polarization contoured beam reflectarray with different coverages in each polarization has been presented. The reflectarray is optimized using a direct optimization technique to produce a contoured beam for a European coverage in H-polarization and a contoured beam for Brazilian coverage in V-polarization in a 10% bandwidth.
{"title":"Design of multi-faceted dual-polarization dual-coverage contoured beam reflectarray","authors":"Min Zhou, S. Sorensen","doi":"10.1109/APS.2014.6904728","DOIUrl":"https://doi.org/10.1109/APS.2014.6904728","url":null,"abstract":"The design and optimization of a single-layer multi-faceted dual-polarization contoured beam reflectarray with different coverages in each polarization has been presented. The reflectarray is optimized using a direct optimization technique to produce a contoured beam for a European coverage in H-polarization and a contoured beam for Brazilian coverage in V-polarization in a 10% bandwidth.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"10 1","pages":"799-800"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81844229","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 : 2014-07-06DOI: 10.1109/APS.2014.6905031
Xin Wang, Jin-Tao He, Lisheng Guo, S. Sha, Mingyu Lu
This paper presents an experimental study on wireless power delivery to low-power mobile devices based on retro-reflective beamforming. In our scheme, a pilot signal comprised of an impulse train is broadcasted from a mobile device. The wireless charger analyzes the received pilot signal, and then accordingly constructs a focused power beam onto the mobile device. In our experiments, 14 mW out of the 1 Watt power transmitted from the charger is harvested by the mobile device 50-cm distance away, and the power beam is capable of tracking the device's location dynamically. In addition, since the pilot signal's spectrum covers a certain frequency range, the carrier of wireless power can be configured among multiple frequencies.
{"title":"Wireless charging for low-power mobile devices based on retro-reflective beamforming","authors":"Xin Wang, Jin-Tao He, Lisheng Guo, S. Sha, Mingyu Lu","doi":"10.1109/APS.2014.6905031","DOIUrl":"https://doi.org/10.1109/APS.2014.6905031","url":null,"abstract":"This paper presents an experimental study on wireless power delivery to low-power mobile devices based on retro-reflective beamforming. In our scheme, a pilot signal comprised of an impulse train is broadcasted from a mobile device. The wireless charger analyzes the received pilot signal, and then accordingly constructs a focused power beam onto the mobile device. In our experiments, 14 mW out of the 1 Watt power transmitted from the charger is harvested by the mobile device 50-cm distance away, and the power beam is capable of tracking the device's location dynamically. In addition, since the pilot signal's spectrum covers a certain frequency range, the carrier of wireless power can be configured among multiple frequencies.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"9 1","pages":"1411-1412"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84949165","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 : 2014-07-06DOI: 10.1109/APS.2014.6905086
R. Gonçalves, N. Carvalho, R. Magueta, A. Duarte, P. Pinho
In this paper we present a possible design for a passive RFID tag antenna on paper substrate to be integrated into bottle labels. Considering the application scenario, we verified and determined the permittivity and dissipation factor of the materials in order to simulate all the possible sources that would influence the antenna performance. The measured results reported a maximum reading range of 1.45 m even though the efficiency obtained with the antenna integrated into the bottle was only of 3%.
{"title":"UHF RFID tag antenna for bottle labeling","authors":"R. Gonçalves, N. Carvalho, R. Magueta, A. Duarte, P. Pinho","doi":"10.1109/APS.2014.6905086","DOIUrl":"https://doi.org/10.1109/APS.2014.6905086","url":null,"abstract":"In this paper we present a possible design for a passive RFID tag antenna on paper substrate to be integrated into bottle labels. Considering the application scenario, we verified and determined the permittivity and dissipation factor of the materials in order to simulate all the possible sources that would influence the antenna performance. The measured results reported a maximum reading range of 1.45 m even though the efficiency obtained with the antenna integrated into the bottle was only of 3%.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"22 1","pages":"1520-1521"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84967353","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 : 2014-07-06DOI: 10.1109/APS.2014.6904838
F. Guo, Y. Mao, Shenheng Xu, Fan Yang, A. Elsherbeni
The parabolic cylindrical antenna and its reflectarray counterpart are well known for enhanced beam steering capability in the focal plane. However, the radiation performance degrades significantly for wide scan angles, for instance gain dropping and beam broadening, due to increased phase errors. In this paper, by exploiting the phase controlling capabilities in reflectarrays, an improved reflectarray based on conventional parabolic cylinder type designs but with optimized phases is proposed. The design of a Ka-band microstrip reflectarray antenna fed by a rotatable array is presented. The preliminary calculated results show that after optimization the scanning range can be significantly increased while maintaining similar radiation characteristics.
{"title":"A modified parabolic-cylindrical reflectarray antenna for wide beam scanning capablility","authors":"F. Guo, Y. Mao, Shenheng Xu, Fan Yang, A. Elsherbeni","doi":"10.1109/APS.2014.6904838","DOIUrl":"https://doi.org/10.1109/APS.2014.6904838","url":null,"abstract":"The parabolic cylindrical antenna and its reflectarray counterpart are well known for enhanced beam steering capability in the focal plane. However, the radiation performance degrades significantly for wide scan angles, for instance gain dropping and beam broadening, due to increased phase errors. In this paper, by exploiting the phase controlling capabilities in reflectarrays, an improved reflectarray based on conventional parabolic cylinder type designs but with optimized phases is proposed. The design of a Ka-band microstrip reflectarray antenna fed by a rotatable array is presented. The preliminary calculated results show that after optimization the scanning range can be significantly increased while maintaining similar radiation characteristics.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"125 1","pages":"1023-1024"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86002116","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 : 2014-07-06DOI: 10.1109/APS.2014.6905352
A. Qasim, Z. Shen
A new polarization rotator based on a recently proposed 3-D frequency selective structure (FSS) is designed. The rotation is an added function to the band-reject FSS, which is built using an array of parallel plate waveguides. The device exploits an L-shaped slot to generate a 90° rotated E-field component at the output. An example is designed here, operating at 10 GHz, with a half-power (3-dB) fractional bandwidth of 2.7% for the transmission coefficient of the rotated field. The insertion loss is 1.3 dB at the resonant frequency. The proposed rotator exhibits good stability over a large range of oblique incidence. The operating principle of the L-slot is explained, along with an illustration of the field behavior, and the design details are briefly discussed.
{"title":"Angular-stable polarization rotator","authors":"A. Qasim, Z. Shen","doi":"10.1109/APS.2014.6905352","DOIUrl":"https://doi.org/10.1109/APS.2014.6905352","url":null,"abstract":"A new polarization rotator based on a recently proposed 3-D frequency selective structure (FSS) is designed. The rotation is an added function to the band-reject FSS, which is built using an array of parallel plate waveguides. The device exploits an L-shaped slot to generate a 90° rotated E-field component at the output. An example is designed here, operating at 10 GHz, with a half-power (3-dB) fractional bandwidth of 2.7% for the transmission coefficient of the rotated field. The insertion loss is 1.3 dB at the resonant frequency. The proposed rotator exhibits good stability over a large range of oblique incidence. The operating principle of the L-slot is explained, along with an illustration of the field behavior, and the design details are briefly discussed.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"75 1","pages":"2050-2051"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76679328","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 : 2014-07-06DOI: 10.1109/APS.2014.6905420
F. Vico, M. Ferrando-Bataller, A. Berenguer, D. Sánchez-Escuderos
In this paper we present a low frequency integral formulation for the scattering of perfect electric conducting objects. The formulation is a first order approximation for low frequency and is based on the fact that the vector and scalar potentials are decoupled at zero frequency. In this regime we find suitable boundary conditions for the vector potential and for the scalar potential. We test the accuracy of this approximation at low frequency. The geometry under test is the sphere and the exact reference solution used is the Mie series.
{"title":"Integral equation for low frequency scattering problem of perfect electric conductors in quasi-static regime","authors":"F. Vico, M. Ferrando-Bataller, A. Berenguer, D. Sánchez-Escuderos","doi":"10.1109/APS.2014.6905420","DOIUrl":"https://doi.org/10.1109/APS.2014.6905420","url":null,"abstract":"In this paper we present a low frequency integral formulation for the scattering of perfect electric conducting objects. The formulation is a first order approximation for low frequency and is based on the fact that the vector and scalar potentials are decoupled at zero frequency. In this regime we find suitable boundary conditions for the vector potential and for the scalar potential. We test the accuracy of this approximation at low frequency. The geometry under test is the sphere and the exact reference solution used is the Mie series.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"126 1","pages":"2186-2187"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77013680","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 : 2014-07-06DOI: 10.1109/APS.2014.6905105
F. Hyjazie, P. Watson, H. Boutayeb
In this work, a new base station antenna is proposed. Two separate frequency bands with separate radiating elements are used in each band. The frequency band separation ratio is about 1.3:1. These elements are arranged with different spacing (wider spacing for the lower frequency band, and narrower spacing for the higher frequency band). Isolation between bands inherently exists in this approach. This avoids the grating lobe effect, and mitigates the beam narrowing (dispersion) seen with fixed element spacing covering the whole wide bandwidth. A new low-profile cross dipole is designed, which is integrated in the array with an EBG/AMC structure for reducing the size of low band elements and decreasing coupling at high band.
{"title":"Dual band interleaved base station phased array antenna with optimized cross-dipole and EBG/AMC structure","authors":"F. Hyjazie, P. Watson, H. Boutayeb","doi":"10.1109/APS.2014.6905105","DOIUrl":"https://doi.org/10.1109/APS.2014.6905105","url":null,"abstract":"In this work, a new base station antenna is proposed. Two separate frequency bands with separate radiating elements are used in each band. The frequency band separation ratio is about 1.3:1. These elements are arranged with different spacing (wider spacing for the lower frequency band, and narrower spacing for the higher frequency band). Isolation between bands inherently exists in this approach. This avoids the grating lobe effect, and mitigates the beam narrowing (dispersion) seen with fixed element spacing covering the whole wide bandwidth. A new low-profile cross dipole is designed, which is integrated in the array with an EBG/AMC structure for reducing the size of low band elements and decreasing coupling at high band.","PeriodicalId":6663,"journal":{"name":"2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)","volume":"265 1","pages":"1558-1559"},"PeriodicalIF":0.0,"publicationDate":"2014-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77157970","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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