Pub Date : 2016-07-10DOI: 10.1109/ANTEM.2016.7550163
Bybi P. Chacko, G. Augustin, Arun Kesavan, T. Denidni
A pattern reconfigurable antenna using an innovative active frequency selective surface is presented. The antenna system comprises of a simple dipole and a cantilever based flat active frequency selective surface screen. The electrostatically actuated cantilever arms are employed, for switching the frequency selective surface between the transparent and opaque modes. Simulation results demonstrate that the proposed structure became opaque when the cantilever arms are at the DOWN state, which results in a directional radiation pattern.
{"title":"Pattern-reconfigurable antenna using cantilever based-AFSS","authors":"Bybi P. Chacko, G. Augustin, Arun Kesavan, T. Denidni","doi":"10.1109/ANTEM.2016.7550163","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550163","url":null,"abstract":"A pattern reconfigurable antenna using an innovative active frequency selective surface is presented. The antenna system comprises of a simple dipole and a cantilever based flat active frequency selective surface screen. The electrostatically actuated cantilever arms are employed, for switching the frequency selective surface between the transparent and opaque modes. Simulation results demonstrate that the proposed structure became opaque when the cantilever arms are at the DOWN state, which results in a directional radiation pattern.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132889944","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550111
Jun Shi, Degang Sun, Xuejie Ding, Jianlin Hu, A. Yongaçoğlu
Information might be leaked through electromagnetic radiation from a computer display. Radiation containing information and radiation without information should be treated differently. Therefore, a novel algorithm has been developed to determine whether or not information is leaked in electromagnetic radiation. Motivated by the observation that the Gabor coefficients of information part and the non-information part of reconstructed image follow different statistical distribution, we propose a method to describe these differences and detect information leakage. In this method, probability graph theory is used and the probability mean distance is defined. In addition, the detection rule is set to realize automatic detection of information. By using this method, we can accurately and efficiently detect the information leakage in electromagnetic radiation from a computer display.
{"title":"Information leakage detection from computer display in electromagnetic radiation","authors":"Jun Shi, Degang Sun, Xuejie Ding, Jianlin Hu, A. Yongaçoğlu","doi":"10.1109/ANTEM.2016.7550111","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550111","url":null,"abstract":"Information might be leaked through electromagnetic radiation from a computer display. Radiation containing information and radiation without information should be treated differently. Therefore, a novel algorithm has been developed to determine whether or not information is leaked in electromagnetic radiation. Motivated by the observation that the Gabor coefficients of information part and the non-information part of reconstructed image follow different statistical distribution, we propose a method to describe these differences and detect information leakage. In this method, probability graph theory is used and the probability mean distance is defined. In addition, the detection rule is set to realize automatic detection of information. By using this method, we can accurately and efficiently detect the information leakage in electromagnetic radiation from a computer display.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134389734","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550196
Hassna Ouassal, J. Shaker, K. Hettak, R. Chaharmir, L. Roy
Compact waveguides based on electromagnetic-bandgap (EBG) technology using layered arrays of periodic metallic rings on a substrate have been developed. Structures have been designed and built that operate in the X-band. The measured insertion losses are about 2.8 dB in the overall operating bandwidth.
{"title":"Compact EBG guides using substrate layered rings","authors":"Hassna Ouassal, J. Shaker, K. Hettak, R. Chaharmir, L. Roy","doi":"10.1109/ANTEM.2016.7550196","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550196","url":null,"abstract":"Compact waveguides based on electromagnetic-bandgap (EBG) technology using layered arrays of periodic metallic rings on a substrate have been developed. Structures have been designed and built that operate in the X-band. The measured insertion losses are about 2.8 dB in the overall operating bandwidth.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"48 24","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133657226","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550210
Muhammad M. Tahseen, A. Kishk
Flexible wideband dielectric resonator antennas (DRA) are designed using textile materials for wearable application at the wireless local area network (WLAN) band. The antennas are designed with different possible feeding technique e.g. coaxial probe feeding, and the aperture coupled method when feed transmission line is embroidered using conductive thread. Before using textile materials in antenna design, the material parameters are extracted using resonance technique, which are validated with measurements. A solid ground (GND) plane is replaced with shielded fabric GND plane, for more flexibility. To counter the fabrication problems, a fabric (with dielectric constant close to air) covering the DRA and holding it to its accurate position, will be stitched around at the upper layer, that will resolve the possible DRA movement. The proposed DRA antennas provide more than 25 % matching bandwidth, 1-dB gain bandwidth of more than 20 % and the maximum radiation efficiency of 97 % (at 5.8 GHz).
{"title":"Textile-based wideband flexible wearable dielectric resonator antennas for WLAN-band","authors":"Muhammad M. Tahseen, A. Kishk","doi":"10.1109/ANTEM.2016.7550210","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550210","url":null,"abstract":"Flexible wideband dielectric resonator antennas (DRA) are designed using textile materials for wearable application at the wireless local area network (WLAN) band. The antennas are designed with different possible feeding technique e.g. coaxial probe feeding, and the aperture coupled method when feed transmission line is embroidered using conductive thread. Before using textile materials in antenna design, the material parameters are extracted using resonance technique, which are validated with measurements. A solid ground (GND) plane is replaced with shielded fabric GND plane, for more flexibility. To counter the fabrication problems, a fabric (with dielectric constant close to air) covering the DRA and holding it to its accurate position, will be stitched around at the upper layer, that will resolve the possible DRA movement. The proposed DRA antennas provide more than 25 % matching bandwidth, 1-dB gain bandwidth of more than 20 % and the maximum radiation efficiency of 97 % (at 5.8 GHz).","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129561705","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550230
P. Hazarika, A. Santorelli, M. Popovic
Within the last decade, multistatic radar systems have been reported for use in breast cancer detection. In this paper, the authors contribute to this field with a study on antenna array configuration and its consequence on image quality using the Delay-Multiply-and-Sum (DMAS) algorithm. Four different array configurations are presented and tested on a 3-D numerical breast phantom. We show the results for and demonstrate the advantages of symmetrical, regularly-spaced and asymmetric irregular antenna arrangement.
{"title":"Investigation of antenna array configurations for microwave radar breast screening","authors":"P. Hazarika, A. Santorelli, M. Popovic","doi":"10.1109/ANTEM.2016.7550230","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550230","url":null,"abstract":"Within the last decade, multistatic radar systems have been reported for use in breast cancer detection. In this paper, the authors contribute to this field with a study on antenna array configuration and its consequence on image quality using the Delay-Multiply-and-Sum (DMAS) algorithm. Four different array configurations are presented and tested on a 3-D numerical breast phantom. We show the results for and demonstrate the advantages of symmetrical, regularly-spaced and asymmetric irregular antenna arrangement.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132583709","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550199
S. Adibifard, A. Kouki
A wide-band wide-scan phased array is investigated by utilizing the beamforming network that is based on a microstrip Rotman lens. A wide beam scanning capability of ±40° for the frequency range 8-12 GHz is demonstrated. The most crucial part is to design a wide beam scanning rotman lens in conjunction-with a good impedance matching over the entire frequency band. To do so, dummy ports are placed between inputs ports and output ports of Rotman lens as mutual coupling between ports are reduced significantly which results in improving the performance of Rotman lens.
{"title":"Design of a wideband Rotman lens with dummy ports for wide-scan phased array applications","authors":"S. Adibifard, A. Kouki","doi":"10.1109/ANTEM.2016.7550199","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550199","url":null,"abstract":"A wide-band wide-scan phased array is investigated by utilizing the beamforming network that is based on a microstrip Rotman lens. A wide beam scanning capability of ±40° for the frequency range 8-12 GHz is demonstrated. The most crucial part is to design a wide beam scanning rotman lens in conjunction-with a good impedance matching over the entire frequency band. To do so, dummy ports are placed between inputs ports and output ports of Rotman lens as mutual coupling between ports are reduced significantly which results in improving the performance of Rotman lens.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114687154","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550186
M. Niroo-jazi, H. Al-Saedi, S. Gigoyan, S. Safavi-Naeini
A scanned beam reflectarray antenna (RA) is theoretically designed and analyzed for Ka-band satellite communications on the move (SOTM). A general theoretical approach is developed where the effect of mutual couplings between elements of the array is reasonably considered, resulting in a good prediction of antenna radiation characteristics. The designed reflectarray is constructed with a new broadband and low loss unit cell (UC). Some of the primary achievements are presented, showing pattern gain loss better than -4.8 dB, cross polarization level less than -10 dB (worse cases are in ±45° inter-cardinal planes), and side lobe level less than -27 dB for scanned angles up to ±60° from broadside in whole azimuth area.
{"title":"Design and analysis of reconfigurable reflectarray antennas for Ka-band satellite communications on the move","authors":"M. Niroo-jazi, H. Al-Saedi, S. Gigoyan, S. Safavi-Naeini","doi":"10.1109/ANTEM.2016.7550186","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550186","url":null,"abstract":"A scanned beam reflectarray antenna (RA) is theoretically designed and analyzed for Ka-band satellite communications on the move (SOTM). A general theoretical approach is developed where the effect of mutual couplings between elements of the array is reasonably considered, resulting in a good prediction of antenna radiation characteristics. The designed reflectarray is constructed with a new broadband and low loss unit cell (UC). Some of the primary achievements are presented, showing pattern gain loss better than -4.8 dB, cross polarization level less than -10 dB (worse cases are in ±45° inter-cardinal planes), and side lobe level less than -27 dB for scanned angles up to ±60° from broadside in whole azimuth area.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132879143","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550229
Hamid Bagherli, I. Jeffrey
The discontinuous Galerkin method (DGM) is a flexible high-order forward solver for time-harmonic scattering problems in electromagnetics that results in a typically sparse system of linear equations. However, when exact radiating boundary conditions (ERBCs) are used to truncate the computational domain, a dense block is introduced into the DGM system that relates elements on a Huygens surface to elements on the boundary of the computational domain. In the context of iterative solution methods, this dense block can dominate the cost of evaluating matrix-vector-products and should be accelerated. Herein, we investigate the application of Hierarchical Matrices (H-matrices) to compress and accelerate the evaluation of the dense ERBC sub-matrix. Results are limited to high-order 2D transverse magnetic problems but demonstrate that effective compression resulting in substantial memory and time savings can be achieved even for relatively small problem sizes.
{"title":"H-matrix compression of discontinous Galerkin method exact radiating boundary conditions","authors":"Hamid Bagherli, I. Jeffrey","doi":"10.1109/ANTEM.2016.7550229","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550229","url":null,"abstract":"The discontinuous Galerkin method (DGM) is a flexible high-order forward solver for time-harmonic scattering problems in electromagnetics that results in a typically sparse system of linear equations. However, when exact radiating boundary conditions (ERBCs) are used to truncate the computational domain, a dense block is introduced into the DGM system that relates elements on a Huygens surface to elements on the boundary of the computational domain. In the context of iterative solution methods, this dense block can dominate the cost of evaluating matrix-vector-products and should be accelerated. Herein, we investigate the application of Hierarchical Matrices (H-matrices) to compress and accelerate the evaluation of the dense ERBC sub-matrix. Results are limited to high-order 2D transverse magnetic problems but demonstrate that effective compression resulting in substantial memory and time savings can be achieved even for relatively small problem sizes.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133325670","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550192
S. Mener, R. Gillard, L. Roy
A Ka-band phase shifter is a key component of phased array antennas for SatCom applications. By using GaN technology, large power handling capability and high frequency operation can be achieved. In this paper, a HEMT GaN switch using a metal gate of 0.15μm is designed at 30 GHz for signal levels up to 37 dBm. From this efficient GaN switch, a compact and innovative monolithic phase-shifter is proposed for Ka-band operation with a 2-bit phase resolution and attractive insertion loss, isolation and bandwidth performance.
{"title":"A novel Ka-band GaN phase shifter for SATCOM phased-array antennas","authors":"S. Mener, R. Gillard, L. Roy","doi":"10.1109/ANTEM.2016.7550192","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550192","url":null,"abstract":"A Ka-band phase shifter is a key component of phased array antennas for SatCom applications. By using GaN technology, large power handling capability and high frequency operation can be achieved. In this paper, a HEMT GaN switch using a metal gate of 0.15μm is designed at 30 GHz for signal levels up to 37 dBm. From this efficient GaN switch, a compact and innovative monolithic phase-shifter is proposed for Ka-band operation with a 2-bit phase resolution and attractive insertion loss, isolation and bandwidth performance.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123407824","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 : 2016-07-10DOI: 10.1109/ANTEM.2016.7550169
R. Simorangkir, Yang Yang, K. Esselle
In this paper, two approaches in fabricating textile antennas with double-layer embroidery technique, as one of the way to increase the textile antennas' efficiency, are discussed and compared. In the first approach, a conductive thread is used for both the upper and lower (bobbin) threads, while in the second, the conductive thread is used only for the lower thread but the embroidery process is done twice. To study the effect of each approach, two embroidered rectangular patch antennas operating at 2.45 GHz ISM band were fabricated and measured. The embroidered layers were then placed on top of a 3.175 mm thick Rogers TMM3 substrate, tested, and compared with an etched copper version of the patch antenna. The results show that both approaches give a comparable radiation performance to the etched copper version with a slightly higher efficiency in the first one. However, the second approach allows faster and cost efficient fabrication.
{"title":"Double-layer embroidery strategy for fabrication of textile antennas with improved efficiency","authors":"R. Simorangkir, Yang Yang, K. Esselle","doi":"10.1109/ANTEM.2016.7550169","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550169","url":null,"abstract":"In this paper, two approaches in fabricating textile antennas with double-layer embroidery technique, as one of the way to increase the textile antennas' efficiency, are discussed and compared. In the first approach, a conductive thread is used for both the upper and lower (bobbin) threads, while in the second, the conductive thread is used only for the lower thread but the embroidery process is done twice. To study the effect of each approach, two embroidered rectangular patch antennas operating at 2.45 GHz ISM band were fabricated and measured. The embroidered layers were then placed on top of a 3.175 mm thick Rogers TMM3 substrate, tested, and compared with an etched copper version of the patch antenna. The results show that both approaches give a comparable radiation performance to the etched copper version with a slightly higher efficiency in the first one. However, the second approach allows faster and cost efficient fabrication.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123640360","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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