Pub Date : 2016-08-25DOI: 10.1109/ANTEM.2016.7550240
K. Nemez, M. Asefi, A. Baran, J. Lovetri
The development of a 3D Microwave Imaging system for breast cancer detection is described. The system is comprised of twenty four magnetic field probes mounted in an air-filled faceted resonant chamber. Simulations of the system are detailed, and the ability to image a simplified four region breast phantom using appropriate prior information is demonstrated. Inversion of the data was performed by a full vectorial 3D FEM-CSI algorithm. Prototype magnetic field probes are described and their performance is evaluated using GTEM cell measurements. The simulation and probe performance results lay the foundation for continued development of this system.
{"title":"A faceted magnetic field probe resonant chamber for 3D breast MWI: A synthetic study","authors":"K. Nemez, M. Asefi, A. Baran, J. Lovetri","doi":"10.1109/ANTEM.2016.7550240","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550240","url":null,"abstract":"The development of a 3D Microwave Imaging system for breast cancer detection is described. The system is comprised of twenty four magnetic field probes mounted in an air-filled faceted resonant chamber. Simulations of the system are detailed, and the ability to image a simplified four region breast phantom using appropriate prior information is demonstrated. Inversion of the data was performed by a full vectorial 3D FEM-CSI algorithm. Prototype magnetic field probes are described and their performance is evaluated using GTEM cell measurements. The simulation and probe performance results lay the foundation for continued development of this system.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130367719","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 : 2016-08-25DOI: 10.1109/ANTEM.2016.7550132
T. F. Leao, V. Mooney-Chopin, C. Trueman
This paper presents the results of a measurement campaign designed to demonstrate the effect of embedded metal studs on the reflection properties of a gyproc wall at 2.45 GHz. Measurements are made of the field strength near a wall constructed of two gyproc slabs separated by an air layer, and compared with a Geometrical Optics simulation, with good agreement. When metal studs are embedded in the wall, changes are seen in the measured field strength due to scattering from the studs. When the incidence angle on the wall is oblique there is more scattering from the studs than at near-grazing incidence. The paper shows that scattering from the embedded metal studs does not have a significant impact on the statistics of the small-scale spatial variation of the electric field strength near the wall.
{"title":"Effect of metal studs on the reflection properties of gyproc walls, and on the statistics of the electric field strength","authors":"T. F. Leao, V. Mooney-Chopin, C. Trueman","doi":"10.1109/ANTEM.2016.7550132","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550132","url":null,"abstract":"This paper presents the results of a measurement campaign designed to demonstrate the effect of embedded metal studs on the reflection properties of a gyproc wall at 2.45 GHz. Measurements are made of the field strength near a wall constructed of two gyproc slabs separated by an air layer, and compared with a Geometrical Optics simulation, with good agreement. When metal studs are embedded in the wall, changes are seen in the measured field strength due to scattering from the studs. When the incidence angle on the wall is oblique there is more scattering from the studs than at near-grazing incidence. The paper shows that scattering from the embedded metal studs does not have a significant impact on the statistics of the small-scale spatial variation of the electric field strength near the wall.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127759585","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.2016.7550202
A. Mehrabani, L. Shafai
The performance of symmetric circular polarized primary feed with polarization reconfigurability is investigated for prime-focused parabolic reflector antennas. The feed is a dual-polarized and center-fed spiral antennas with symmetric radiation patterns and excellent circular polarization for both right- and left senses.
{"title":"Symmetrie wideband primary feed with polarization reconfigurability","authors":"A. Mehrabani, L. Shafai","doi":"10.1109/ANTEM.2016.7550202","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550202","url":null,"abstract":"The performance of symmetric circular polarized primary feed with polarization reconfigurability is investigated for prime-focused parabolic reflector antennas. The feed is a dual-polarized and center-fed spiral antennas with symmetric radiation patterns and excellent circular polarization for both right- and left senses.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"90 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":"117168071","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.2016.7550136
A. A. Baba, R. Hashmi, K. Esselle
In this paper, a simple wideband electromagnetic bandgap (EBG) resonator antenna (ERA) with an all-dielectric superstructure is presented to operate at 60 GHz. The antenna superstructure consists of two circular dielectric slabs with different relative permittivity values. A waveguide-fed slot antenna is used to excite the antenna's cavity and is placed about half a wavelength from the superstructure. The single ERA element exhibits a peak directivity of 16.6 dBi with a directivity bandwidth of 35%. In addition to this, the antenna's directivity remains greater than 14.3 dBi over the entire unlicensed 60 GHz wireless band from 59 GHz to 67 GHz. The feed antenna is well matched over the frequency band and the overall ERA has total footprint of only 1.5λ02.
{"title":"A simple electromagnetic bandgap resonator antenna for 60 GHz wireless applications","authors":"A. A. Baba, R. Hashmi, K. Esselle","doi":"10.1109/ANTEM.2016.7550136","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550136","url":null,"abstract":"In this paper, a simple wideband electromagnetic bandgap (EBG) resonator antenna (ERA) with an all-dielectric superstructure is presented to operate at 60 GHz. The antenna superstructure consists of two circular dielectric slabs with different relative permittivity values. A waveguide-fed slot antenna is used to excite the antenna's cavity and is placed about half a wavelength from the superstructure. The single ERA element exhibits a peak directivity of 16.6 dBi with a directivity bandwidth of 35%. In addition to this, the antenna's directivity remains greater than 14.3 dBi over the entire unlicensed 60 GHz wireless band from 59 GHz to 67 GHz. The feed antenna is well matched over the frequency band and the overall ERA has total footprint of only 1.5λ02.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"49 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":"117181526","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.2016.7550130
M. S. Sorkherizi, A. Kishk
In this paper, design of bandstop filters using double ridge waveguide technology is presented. The proposed filter has a very wide passband that can cover the whole standard frequency span of the double ridge waveguide. In order to achieve the required matching level in the passband, multi-section impedance inverters are used between every cavity resonators. A 3rd order filter is considered to prove the design procedure.
{"title":"Bandstop filters on double ridge waveguide with wide matched passbands","authors":"M. S. Sorkherizi, A. Kishk","doi":"10.1109/ANTEM.2016.7550130","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550130","url":null,"abstract":"In this paper, design of bandstop filters using double ridge waveguide technology is presented. The proposed filter has a very wide passband that can cover the whole standard frequency span of the double ridge waveguide. In order to achieve the required matching level in the passband, multi-section impedance inverters are used between every cavity resonators. A 3rd order filter is considered to prove the design procedure.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"95 5 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":"126074639","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.2016.7550203
M. Clénet, Slobodan Jović
GPS is currently the main Global Navigation Satellite System. GLONASS, the Russian GNSS, became fully operational few years ago. Other GNSSs will become soon available and a new generation of low cost receivers can take advantage all the systems to improve accuracy or robustness in a challenged environment. Such receivers need performant antennas and RF front-ends. This paper presents a review of research work on GNSS antenna technologies carried out at DRDC Ottawa Research Centre in collaboration with several universities.
{"title":"A review of research on GNSS antenna technologies at DRDC Ottawa Research Centre","authors":"M. Clénet, Slobodan Jović","doi":"10.1109/ANTEM.2016.7550203","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550203","url":null,"abstract":"GPS is currently the main Global Navigation Satellite System. GLONASS, the Russian GNSS, became fully operational few years ago. Other GNSSs will become soon available and a new generation of low cost receivers can take advantage all the systems to improve accuracy or robustness in a challenged environment. Such receivers need performant antennas and RF front-ends. This paper presents a review of research work on GNSS antenna technologies carried out at DRDC Ottawa Research Centre in collaboration with several universities.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"23 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":"125348406","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.2016.7550214
M. Mastro, V. Wheeler
In this paper, a superlattice VO2/SiO2 metamaterial on a lossy substrate is designed to create a near perfect absorber with tunability across the infrared spectrum. We selected VO2 as it presents a dielectric to metal-like phase change slightly above room temperature. Additionally, the slightly lossy nature of high-temperature VO2 presents comparable and small components (real and imaginary) of the complex refractive index across portions of the visible and infrared. Coupled with a limited conductivity substrate, VO2 has been employed to create highly absorbing/emitting structures where the thickness of the VO2 is ultra-thin (t <;<; λ/4n). Nevertheless, metal-like VO2 does not possess comparable and small components of the complex refractive index across the entire infrared spectrum, which limits the universality of this ultra-thin VO2 absorber design. Here we employ an ultra-thin superlattice of VO2/SiO2 to create a composite metamaterial that is readily designed for high absorbance across the infrared spectrum.
{"title":"Ultra-thin absorber based on phase change metamaterial superlattice","authors":"M. Mastro, V. Wheeler","doi":"10.1109/antem.2016.7550214","DOIUrl":"https://doi.org/10.1109/antem.2016.7550214","url":null,"abstract":"In this paper, a superlattice VO<sub>2</sub>/SiO<sub>2</sub> metamaterial on a lossy substrate is designed to create a near perfect absorber with tunability across the infrared spectrum. We selected VO<sub>2</sub> as it presents a dielectric to metal-like phase change slightly above room temperature. Additionally, the slightly lossy nature of high-temperature VO<sub>2</sub> presents comparable and small components (real and imaginary) of the complex refractive index across portions of the visible and infrared. Coupled with a limited conductivity substrate, VO<sub>2</sub> has been employed to create highly absorbing/emitting structures where the thickness of the VO<sub>2</sub> is ultra-thin (t <;<; λ/4n). Nevertheless, metal-like VO<sub>2</sub> does not possess comparable and small components of the complex refractive index across the entire infrared spectrum, which limits the universality of this ultra-thin VO<sub>2</sub> absorber design. Here we employ an ultra-thin superlattice of VO<sub>2</sub>/SiO<sub>2</sub> to create a composite metamaterial that is readily designed for high absorbance across the infrared spectrum.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"15 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":"115080865","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.2016.7550164
S. Shams, A. Kishk
The Ridge gap waveguide is a promising guiding structure, where there is no need to ensure the electrical contact and it has a possible operating bandwidth of 2:1 or even more. However, most of the presented passive devices based on this technology support a small portion of the possible bandwidth. This limitation is due to either the objective device or the excitation technique. In this work, a wide band power divider is introduced. The bandwidth of the presented power divider is from 10.3 GHz to 20.3 GHz, which is, almost, the possible bandwidth of the Ridge Gap Waveguide (RGW) unit cell. The matching level of the complete structure is better than 17 dB for the operating bandwidth.
{"title":"Wide band power divider based on Ridge gap waveguide","authors":"S. Shams, A. Kishk","doi":"10.1109/ANTEM.2016.7550164","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550164","url":null,"abstract":"The Ridge gap waveguide is a promising guiding structure, where there is no need to ensure the electrical contact and it has a possible operating bandwidth of 2:1 or even more. However, most of the presented passive devices based on this technology support a small portion of the possible bandwidth. This limitation is due to either the objective device or the excitation technique. In this work, a wide band power divider is introduced. The bandwidth of the presented power divider is from 10.3 GHz to 20.3 GHz, which is, almost, the possible bandwidth of the Ridge Gap Waveguide (RGW) unit cell. The matching level of the complete structure is better than 17 dB for the operating bandwidth.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"36 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":"122539880","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.2016.7550140
I. Mohamed, A. Sebak
In this paper, a linearly tapered slot antenna (LTSA) array fed with a substrate integrated waveguide (SIW) is proposed. An SIW-based 4-way power divider with broadband and low loss properties is designed to implement a compact planar feed network. The array shows a gain of 21 dB with a return loss better than 15 dB over the band of interest (54-66 GHz). The total efficiency of the antenna array is 87 %. The antenna array has a cross polarization level of -22 dB. The proposed array is suitable for 60 GHz short range wireless communications.
{"title":"Linearly tapered slot antenna array with SIW feed network for 60 GHz applications","authors":"I. Mohamed, A. Sebak","doi":"10.1109/ANTEM.2016.7550140","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550140","url":null,"abstract":"In this paper, a linearly tapered slot antenna (LTSA) array fed with a substrate integrated waveguide (SIW) is proposed. An SIW-based 4-way power divider with broadband and low loss properties is designed to implement a compact planar feed network. The array shows a gain of 21 dB with a return loss better than 15 dB over the band of interest (54-66 GHz). The total efficiency of the antenna array is 87 %. The antenna array has a cross polarization level of -22 dB. The proposed array is suitable for 60 GHz short range wireless communications.","PeriodicalId":447985,"journal":{"name":"2016 17th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"31 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":"122984650","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.2016.7550165
S. Shams, Mohamed A. Abdelaal, A. Kishk
Magic Tee is a four port passive device presented more than 50 years ago. It is deployed in many applications such as duplexers and antenna feeding structures. This type of devices is developed and implemented through different guiding structures. Two major modern guiding structures are the Substrate integrated waveguide (SIW) and the Ridge Gap Waveguide (RGW). This paper introduces a compact magic Tee design implemented by a mixed technology of SIW and RGW. The traditional magic tee contains three ports in one plane, while the fourth port exists in another plane. This results in a large size of the complete structure. This work proposes mixing two different guiding structures in one design in order to overcome this problem. The final results of the magic Tee with the RGW transition shows a good matching and isolation levels for the required bandwidth.
{"title":"SIW magic tee fed by printed Ridge Gap Waveguide design","authors":"S. Shams, Mohamed A. Abdelaal, A. Kishk","doi":"10.1109/ANTEM.2016.7550165","DOIUrl":"https://doi.org/10.1109/ANTEM.2016.7550165","url":null,"abstract":"Magic Tee is a four port passive device presented more than 50 years ago. It is deployed in many applications such as duplexers and antenna feeding structures. This type of devices is developed and implemented through different guiding structures. Two major modern guiding structures are the Substrate integrated waveguide (SIW) and the Ridge Gap Waveguide (RGW). This paper introduces a compact magic Tee design implemented by a mixed technology of SIW and RGW. The traditional magic tee contains three ports in one plane, while the fourth port exists in another plane. This results in a large size of the complete structure. This work proposes mixing two different guiding structures in one design in order to overcome this problem. The final results of the magic Tee with the RGW transition shows a good matching and isolation levels for the required bandwidth.","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":"129112632","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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