Nader Engheta is the H. Nedwill Ramsey Professor at the University of Pennsylvania in Philadelphia, with affiliations in the Departments of Electrical and Systems Engineering, Bioengineering, Materials Science and Engineering, and Physics and Astronomy. He received his B.S. degree from the University of Tehran and his M.S and Ph.D. degrees from Caltech. His current research activities span a broad range of areas including metamaterials, photonics, nano-optics, graphene optics, electrodynamics, imaging and sensing inspired by eyes of animal species, microwave and optical antennas, and physics and engineering of fields and waves.
{"title":"Keynote Speakers","authors":"Hermann Jacobs","doi":"10.1111/ajco.13069","DOIUrl":"https://doi.org/10.1111/ajco.13069","url":null,"abstract":"Nader Engheta is the H. Nedwill Ramsey Professor at the University of Pennsylvania in Philadelphia, with affiliations in the Departments of Electrical and Systems Engineering, Bioengineering, Materials Science and Engineering, and Physics and Astronomy. He received his B.S. degree from the University of Tehran and his M.S and Ph.D. degrees from Caltech. His current research activities span a broad range of areas including metamaterials, photonics, nano-optics, graphene optics, electrodynamics, imaging and sensing inspired by eyes of animal species, microwave and optical antennas, and physics and engineering of fields and waves.","PeriodicalId":414455,"journal":{"name":"2018 18th Mediterranean Microwave Symposium (MMS)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114595286","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 : 2018-10-01DOI: 10.1109/MMS.2018.8612093
A. Munir, M. Ulfah, Chairunnisa
In this paper, the development of a multilayered substrate integrated waveguide (SIW) antenna which has wideband characteristic response is presented. The wideband characteristic response is attempted by incorporating a cross slot upon the radiator of SIW antenna and a rectangular split ring slot combined with an X-shape slot of defected ground structure (DGS) at the groundplane. The proposed SIW antenna is implemented using multilayer FR4 epoxy dielectric substrates and fed by a proximity coupling technique connected through a 50Ω SMA connector. From measurement result shows that the fractional bandwidth of 42.3% could be achieved by the proposed SIW antenna in which the −10dB bandwidth response is ranged from the frequency of 1.725GHz to 2.625GHz.
{"title":"Multilayered Wideband SIW Antenna Incorporated with Slot and DGS","authors":"A. Munir, M. Ulfah, Chairunnisa","doi":"10.1109/MMS.2018.8612093","DOIUrl":"https://doi.org/10.1109/MMS.2018.8612093","url":null,"abstract":"In this paper, the development of a multilayered substrate integrated waveguide (SIW) antenna which has wideband characteristic response is presented. The wideband characteristic response is attempted by incorporating a cross slot upon the radiator of SIW antenna and a rectangular split ring slot combined with an X-shape slot of defected ground structure (DGS) at the groundplane. The proposed SIW antenna is implemented using multilayer FR4 epoxy dielectric substrates and fed by a proximity coupling technique connected through a 50Ω SMA connector. From measurement result shows that the fractional bandwidth of 42.3% could be achieved by the proposed SIW antenna in which the −10dB bandwidth response is ranged from the frequency of 1.725GHz to 2.625GHz.","PeriodicalId":414455,"journal":{"name":"2018 18th Mediterranean Microwave Symposium (MMS)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122983684","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 : 2018-10-01DOI: 10.1109/MMS.2018.8612010
Celal Avci, E. O. Gunes, B. Yarman
In this work, a novel, compact, wide band two-bit digital phase shifter topology based on modified symmetric lattice structure is proposed. The proposed phase shifter circuit is implemented employing the commercially available $pmb{0.18}pmb{mutext{m}}$ silicon CMOS technology. It is exhibited that the new phase shifter topology provides over 3–13 GHz bandwidth with less than 5° rms phase error.
{"title":"Design and Implementation of a Novel and Compact 2-Bit Wide Band Digital Phase Shifter","authors":"Celal Avci, E. O. Gunes, B. Yarman","doi":"10.1109/MMS.2018.8612010","DOIUrl":"https://doi.org/10.1109/MMS.2018.8612010","url":null,"abstract":"In this work, a novel, compact, wide band two-bit digital phase shifter topology based on modified symmetric lattice structure is proposed. The proposed phase shifter circuit is implemented employing the commercially available $pmb{0.18}pmb{mutext{m}}$ silicon CMOS technology. It is exhibited that the new phase shifter topology provides over 3–13 GHz bandwidth with less than 5° rms phase error.","PeriodicalId":414455,"journal":{"name":"2018 18th Mediterranean Microwave Symposium (MMS)","volume":"15 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120851241","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 : 2018-10-01DOI: 10.1109/MMS.2018.8612139
A. Khodja, M. Yagoub, R. Touhami, H. Baudrand
Efficient recurrence expressions are proposed in this paper as promising tools for accurate dispersive analysis of symmetric coplanar structures on uniaxial electric/magnetic anisotropic composite substrates. By using the formalism of mathematical operators, the proposed formulation can accurately evaluate the admittance operator in the modal domain moment method while simplifying its numerical implementation. With an appropriate choice of trial functions, the proposed approach was demonstrated by successfully characterizing multilayered coplanar structures.
{"title":"Practical Recurrence Formulation for Composite Substrates: Application to Coplanar Structures with Bi-Anisotropic Dielectrics","authors":"A. Khodja, M. Yagoub, R. Touhami, H. Baudrand","doi":"10.1109/MMS.2018.8612139","DOIUrl":"https://doi.org/10.1109/MMS.2018.8612139","url":null,"abstract":"Efficient recurrence expressions are proposed in this paper as promising tools for accurate dispersive analysis of symmetric coplanar structures on uniaxial electric/magnetic anisotropic composite substrates. By using the formalism of mathematical operators, the proposed formulation can accurately evaluate the admittance operator in the modal domain moment method while simplifying its numerical implementation. With an appropriate choice of trial functions, the proposed approach was demonstrated by successfully characterizing multilayered coplanar structures.","PeriodicalId":414455,"journal":{"name":"2018 18th Mediterranean Microwave Symposium (MMS)","volume":"234 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120866178","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 : 2018-10-01DOI: 10.1109/MMS.2018.8612014
Hëna Maloku, Zana Limani Fazliu, M. Ibrani, A. Mekuli, E. Sela, M. Rajarajan
In this study we conduct an assessment of usage and availability of frequency bands, traditionally assigned to TV broadcasters, in urban environments in Kosovo. The assessment was performed for VHF and UHF bands at 8 different urban locations. Localized measurements indicate that a major part of these frequencies is severely under-utilized even in highly urbanized areas where a higher utilization level would be expected. Preliminary results further show that spectrum utilization level varies significantly with altitude and is much lower in indoor environments. Our initial calculations show that current percentage of availability of TV bands in tested locations varies between 87.5% and 100%. These results indicate that spectrum utilization in these bands could be greatly improved by allowing the opportunistic use of spectrum by cognitive radios and other wireless communication technologies, such as future cellular networks.
{"title":"Measurement of Frequency Occupancy Levels in TV Bands in Urban Environment in Kosovo","authors":"Hëna Maloku, Zana Limani Fazliu, M. Ibrani, A. Mekuli, E. Sela, M. Rajarajan","doi":"10.1109/MMS.2018.8612014","DOIUrl":"https://doi.org/10.1109/MMS.2018.8612014","url":null,"abstract":"In this study we conduct an assessment of usage and availability of frequency bands, traditionally assigned to TV broadcasters, in urban environments in Kosovo. The assessment was performed for VHF and UHF bands at 8 different urban locations. Localized measurements indicate that a major part of these frequencies is severely under-utilized even in highly urbanized areas where a higher utilization level would be expected. Preliminary results further show that spectrum utilization level varies significantly with altitude and is much lower in indoor environments. Our initial calculations show that current percentage of availability of TV bands in tested locations varies between 87.5% and 100%. These results indicate that spectrum utilization in these bands could be greatly improved by allowing the opportunistic use of spectrum by cognitive radios and other wireless communication technologies, such as future cellular networks.","PeriodicalId":414455,"journal":{"name":"2018 18th Mediterranean Microwave Symposium (MMS)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115946494","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 : 2018-10-01DOI: 10.1109/MMS.2018.8612069
Mahmud Esad Yiğit, T. Günel, Gülay Öke Günel
In this work, particle swarm optimization (PSO) based approach to the synthesis of a cylindrical-rectangular ring microstrip conformal antenna using support vector regression (SVR) models is presented. Resonant frequency of the antenna is obtained by PSO of trained SVR models. Radial basis function (RBF) and wavelet kernel functions are used in SVR models. Simulation examples are given and the results are compared.
{"title":"PSO Based Approach to the Synthesis of a Cylindrical-Rectangular Ring Microstrip Conformal Antenna Using SVR Models with RBF and Wavelet Kernels","authors":"Mahmud Esad Yiğit, T. Günel, Gülay Öke Günel","doi":"10.1109/MMS.2018.8612069","DOIUrl":"https://doi.org/10.1109/MMS.2018.8612069","url":null,"abstract":"In this work, particle swarm optimization (PSO) based approach to the synthesis of a cylindrical-rectangular ring microstrip conformal antenna using support vector regression (SVR) models is presented. Resonant frequency of the antenna is obtained by PSO of trained SVR models. Radial basis function (RBF) and wavelet kernel functions are used in SVR models. Simulation examples are given and the results are compared.","PeriodicalId":414455,"journal":{"name":"2018 18th Mediterranean Microwave Symposium (MMS)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132737301","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 : 2018-10-01DOI: 10.1109/MMS.2018.8611907
Vandana, Sandhya Chandravanshi, M. Akhtar
In this paper, a simple RF energy harvesting circuit operating at 1800 MHz to energize low power electronic circuits is proposed. The proposed RF harvesting circuit is based on the novel design of a bow-tie dipole antenna extracting the RF energy from the cellular band of 1800 MHz. The designed antenna is quite robust, whose gain may be further increased with the help of a specially designed artificial magnetic conductor (AMC) and a metal reflector placed at the back side. The antenna is integrated with a Villard voltage doubler based rectifier and the impedance matching unit working in the specified frequency band which provide the maximum simulated efficiency of 59.4%. The antenna is designed using the full wave simulator, the CST studio, and the rectifier along with the matching circuit is simulated using the ADS circuit simulator.
{"title":"Simple RF Energy Harvesting Circuit Using AMC Backed Bowtie Antenna","authors":"Vandana, Sandhya Chandravanshi, M. Akhtar","doi":"10.1109/MMS.2018.8611907","DOIUrl":"https://doi.org/10.1109/MMS.2018.8611907","url":null,"abstract":"In this paper, a simple RF energy harvesting circuit operating at 1800 MHz to energize low power electronic circuits is proposed. The proposed RF harvesting circuit is based on the novel design of a bow-tie dipole antenna extracting the RF energy from the cellular band of 1800 MHz. The designed antenna is quite robust, whose gain may be further increased with the help of a specially designed artificial magnetic conductor (AMC) and a metal reflector placed at the back side. The antenna is integrated with a Villard voltage doubler based rectifier and the impedance matching unit working in the specified frequency band which provide the maximum simulated efficiency of 59.4%. The antenna is designed using the full wave simulator, the CST studio, and the rectifier along with the matching circuit is simulated using the ADS circuit simulator.","PeriodicalId":414455,"journal":{"name":"2018 18th Mediterranean Microwave Symposium (MMS)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125879217","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 : 2018-10-01DOI: 10.1109/MMS.2018.8611805
D. Calzona, L. Boccia, S. Scaccianoce, G. Amendola
In this paper, an innovative design of an on-chip $pmb{8}mathbf{x}pmb{8}$ Butler matrix (BM) in SiGe BiCMOS technology is proposed. The BM is designed for 24 GHz ISM radar indoor applications and it is implemented using the BiCMOS9MW ST Microelectronic process, which is a standard 130 nm SiGe BiCMOS technology. The configuration presented in this work, thanks to the miniaturization of the quadrature hybrid implemented using an intertwined transformer, results extremely compact. Indeed, it was possible to achieve a considerable reduction of the chip area which is equal to $pmb{714 mu}mathbf{m} mathbf{x}pmb{650 mu}mathbf{m}$. The BM was prototyped and experimentally validated using a dedicated test board. The measured results show good performance both in terms of phase linearity and in terms of operating bandwidth.
{"title":"Design of an 8×8 SiGe BiCMOS Butler Matrix","authors":"D. Calzona, L. Boccia, S. Scaccianoce, G. Amendola","doi":"10.1109/MMS.2018.8611805","DOIUrl":"https://doi.org/10.1109/MMS.2018.8611805","url":null,"abstract":"In this paper, an innovative design of an on-chip $pmb{8}mathbf{x}pmb{8}$ Butler matrix (BM) in SiGe BiCMOS technology is proposed. The BM is designed for 24 GHz ISM radar indoor applications and it is implemented using the BiCMOS9MW ST Microelectronic process, which is a standard 130 nm SiGe BiCMOS technology. The configuration presented in this work, thanks to the miniaturization of the quadrature hybrid implemented using an intertwined transformer, results extremely compact. Indeed, it was possible to achieve a considerable reduction of the chip area which is equal to $pmb{714 mu}mathbf{m} mathbf{x}pmb{650 mu}mathbf{m}$. The BM was prototyped and experimentally validated using a dedicated test board. The measured results show good performance both in terms of phase linearity and in terms of operating bandwidth.","PeriodicalId":414455,"journal":{"name":"2018 18th Mediterranean Microwave Symposium (MMS)","volume":"181 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122349916","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 : 2018-10-01DOI: 10.1109/MMS.2018.8612079
M. N. Akıncı
In this paper, we address the problem of capturing the electrical properties of a lossy dielectric slab through reflection coefficient measurements. Different from the previous works, the problem is set as a minimization problem over multifrequency-monostatic/monoview frequency domain measurements. The cost function takes conductivity, dielectric permittivity and thickness of the slab as its variables and measures the squared distance between measured reflection coefficients and analytic formulas. This cost function is minimized via Newton's method. Results show the stability and accuracy of the proposed scheme.
{"title":"Estimation of Electrical Properties of Infinite Slab with Newton's Method","authors":"M. N. Akıncı","doi":"10.1109/MMS.2018.8612079","DOIUrl":"https://doi.org/10.1109/MMS.2018.8612079","url":null,"abstract":"In this paper, we address the problem of capturing the electrical properties of a lossy dielectric slab through reflection coefficient measurements. Different from the previous works, the problem is set as a minimization problem over multifrequency-monostatic/monoview frequency domain measurements. The cost function takes conductivity, dielectric permittivity and thickness of the slab as its variables and measures the squared distance between measured reflection coefficients and analytic formulas. This cost function is minimized via Newton's method. Results show the stability and accuracy of the proposed scheme.","PeriodicalId":414455,"journal":{"name":"2018 18th Mediterranean Microwave Symposium (MMS)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130736143","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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