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Large area graphene electromagnetic devices 大面积石墨烯电磁器件
2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) Pub Date : 2014-07-13 DOI: 10.1109/ANTEM.2014.6887753
T. Szkopek, C. Caloz, H. Skulason
{"title":"Large area graphene electromagnetic devices","authors":"T. Szkopek, C. Caloz, H. Skulason","doi":"10.1109/ANTEM.2014.6887753","DOIUrl":"https://doi.org/10.1109/ANTEM.2014.6887753","url":null,"abstract":"Large area graphene growth provides a facile route to the development of microwave devices based on the interaction of electromagnetic waves with the two dimensional gas of electrons in a graphene sheet. The strength of microwave scattering with graphene is determined by an impedance mismatch Zσ whose natural scale is itself determined by the fine structure constant α = e2/(4πε0hc). Scattering measurements of graphene monolayer loaded waveguides from 17 Hz to 110 GHz reveal a constant sheet conductance with negligible skin effect owing to monolayer atomic thickness. A Drude conductivity tensor can be used to describe the microwave scattering of a graphene sheet under a static magnetic field bias. Measurement of longitudinal conductivity in a Corbino disk geometry can be used to estimate mobility. Transverse conductivity leads to Faraday rotation, which can be used in hollow waveguide structures to implement a gate voltage tunable isolator. As graphene mobility improves, there is potential to exploit both classical and quantum effects in non-reciprocal devices.","PeriodicalId":190987,"journal":{"name":"2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126525651","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}
引用次数: 0
Terahertz graphene magnetoplasmons: Non-reciprocity, tunability and gyrotropy 太赫兹石墨烯磁等离子体:非互易性、可调性和回旋性
2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) Pub Date : 2014-07-13 DOI: 10.1109/ANTEM.2014.6887702
N. Chamanara, T. Szkopek, C. Caloz
{"title":"Terahertz graphene magnetoplasmons: Non-reciprocity, tunability and gyrotropy","authors":"N. Chamanara, T. Szkopek, C. Caloz","doi":"10.1109/ANTEM.2014.6887702","DOIUrl":"https://doi.org/10.1109/ANTEM.2014.6887702","url":null,"abstract":"Non-reciprocity, tunability and gyrotropy of graphene magnetoplasmons in various magnetically biased graphene structures are investigated. Novel terahertz non-reciprocal devices are proposed.","PeriodicalId":190987,"journal":{"name":"2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133694899","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}
引用次数: 1
Analysis of the ADC resolution for radio astronomy applications 用于射电天文学的ADC分辨率分析
2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) Pub Date : 2014-07-13 DOI: 10.1109/ANTEM.2014.6887738
Eugene Zailer, T. Graham, L. Belostotski, R. Plume, Russ Taylor
{"title":"Analysis of the ADC resolution for radio astronomy applications","authors":"Eugene Zailer, T. Graham, L. Belostotski, R. Plume, Russ Taylor","doi":"10.1109/ANTEM.2014.6887738","DOIUrl":"https://doi.org/10.1109/ANTEM.2014.6887738","url":null,"abstract":"This paper discusses the optimization procedure and the selection of the resolution of the analog/digital converter (ADC) for the Square Kilometre Array (SKA) receiver chain. Once the optimum input voltage levels of ADCs with different resolutions are selected, the maximum interference levels and correlator integration time are investigated for a two-antenna system. The selection methodology, based on comparison with an ideal ADC, is outlined using the SKA as an example. This selection methodology can also be applied to other receivers with a different criteria. This work determines that the minimum required number of bits for an SKA ADC is 4 bits provided that the input signal level to the ADC is set properly.","PeriodicalId":190987,"journal":{"name":"2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132467198","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}
引用次数: 6
A wideband MMIC low noise amplifier with series and shunt feedback 带串联和分流反馈的宽带MMIC低噪声放大器
2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) Pub Date : 2014-07-13 DOI: 10.1109/ANTEM.2014.6887707
Filippo Rossi, Chau-Ching Chiong, Huei Wang, Ming-Tang Chen, F. Jiang, P. So, S. Claude, J. Bornemann
{"title":"A wideband MMIC low noise amplifier with series and shunt feedback","authors":"Filippo Rossi, Chau-Ching Chiong, Huei Wang, Ming-Tang Chen, F. Jiang, P. So, S. Claude, J. Bornemann","doi":"10.1109/ANTEM.2014.6887707","DOIUrl":"https://doi.org/10.1109/ANTEM.2014.6887707","url":null,"abstract":"A two-stage MMIC low noise amplifier design is presented using series and shunt feedbacks to achieve simultaneously low noise, input matching and gain flatness performances across the frequency range of 4 to 12 GHz. The amplifier fits into a small die of 2×1 mm2, and achieves a flat gain of 20 dB and a minimum noise figure of 1.5 dB.","PeriodicalId":190987,"journal":{"name":"2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132485601","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}
引用次数: 2
Development of a MEMS-enabled frequency selective surface mems频率选择表面的开发
2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) Pub Date : 2014-07-13 DOI: 10.1109/ANTEM.2014.6887759
M. Safari, C. Shafai, L. Shafai
{"title":"Development of a MEMS-enabled frequency selective surface","authors":"M. Safari, C. Shafai, L. Shafai","doi":"10.1109/ANTEM.2014.6887759","DOIUrl":"https://doi.org/10.1109/ANTEM.2014.6887759","url":null,"abstract":"A frequency selective surface (FSS) based on a capacitively loaded slot in a ground plane is presented. The loading of the slot is achieved by using a MEMS bridge fabricated over the slot. It is shown that varying the height of the MEMS bridge changes the capacitance of the system, which in turn changes the resonance frequency of the FSS. The device was fabricated and tested in an X-band waveguide with customized flanges. The measurements showed the resonance frequency successfully varied from 8.54 to 10.26 GHz. The simulated and measured reflection coefficients showed excellent agreement.","PeriodicalId":190987,"journal":{"name":"2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127285175","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}
引用次数: 3
Free space material characterization using genetic algorithms 利用遗传算法表征自由空间材料
2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) Pub Date : 2014-07-13 DOI: 10.1109/ANTEM.2014.6887668
R. Fenner, S. Keilson
{"title":"Free space material characterization using genetic algorithms","authors":"R. Fenner, S. Keilson","doi":"10.1109/ANTEM.2014.6887668","DOIUrl":"https://doi.org/10.1109/ANTEM.2014.6887668","url":null,"abstract":"This work demonstrates the use of genetic algorithms (GA) to transform the traditional free space characterization process into an optimization process. The basis of the process is to compare the measured reflection coefficient to the reflection coefficient computed by the GA. The GA computes the reflection coefficient using candidate solutions of the permittivity and permeability and the Fresnel reflection coefficient equations. The permittivity and permeability that yield the reflection coefficient closest to the measured reflection coefficient is determined to be the best solution. Results using synthetic reflection coefficient data using a Plexiglas sample show accurate extraction of the permittivity with both transverse electric and transverse magnetic polarized plane waves.","PeriodicalId":190987,"journal":{"name":"2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124893840","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}
引用次数: 11
Designing antennas for the aperture array SKA-low instrument; a system perspective 孔径阵列SKA-low仪器天线设计系统透视图
2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) Pub Date : 2014-07-13 DOI: 10.1109/ANTEM.2014.6887760
E. de Lera Acedo, N. Razavi-Ghods, A. Faulkner, Jan Geralt bij de Vaate
{"title":"Designing antennas for the aperture array SKA-low instrument; a system perspective","authors":"E. de Lera Acedo, N. Razavi-Ghods, A. Faulkner, Jan Geralt bij de Vaate","doi":"10.1109/ANTEM.2014.6887760","DOIUrl":"https://doi.org/10.1109/ANTEM.2014.6887760","url":null,"abstract":"This paper describes the important design aspects of an array antenna for the low frequency instrument of the SKA telescope (SKA-low). The most important considerations to meet the telescope performance requirements are discussed. Finally, a plot of the expected sky brightness sensitivity for phase I of the SKA using log-periodic antennas is presented.","PeriodicalId":190987,"journal":{"name":"2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122885875","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}
引用次数: 0
A vector-based divergence-free meshless method 一种基于矢量的无散度无网格方法
2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) Pub Date : 2014-07-13 DOI: 10.1109/ANTEM.2014.6887728
Shunchuan Yang, Z. Chen, Yiqiang Yu, Sergey A. Ponomarenko
{"title":"A vector-based divergence-free meshless method","authors":"Shunchuan Yang, Z. Chen, Yiqiang Yu, Sergey A. Ponomarenko","doi":"10.1109/ANTEM.2014.6887728","DOIUrl":"https://doi.org/10.1109/ANTEM.2014.6887728","url":null,"abstract":"Unlike its conventional counterpart, a new vector basis function based meshless method that preserves the divergence property of electromagnetic fields is proposed for solving transient electromagnetic problems. Its divergence properties are investigated through numerical experiment; it is found that artificial charges generated by the proposed method are not present while they are in the conventional meshless method in source free regions.","PeriodicalId":190987,"journal":{"name":"2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117221867","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}
引用次数: 1
High frequency radar clutter power for mixed ionosphere-ocean propagation 电离层-海洋混合传播高频雷达杂波功率
2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) Pub Date : 2014-07-13 DOI: 10.1109/ANTEM.2014.6887733
J. Walsh, Shuyan Chen, E. Gill, Weimin Huang
{"title":"High frequency radar clutter power for mixed ionosphere-ocean propagation","authors":"J. Walsh, Shuyan Chen, E. Gill, Weimin Huang","doi":"10.1109/ANTEM.2014.6887733","DOIUrl":"https://doi.org/10.1109/ANTEM.2014.6887733","url":null,"abstract":"Ionospheric clutter is one of the main sources of interference affecting the performance of high frequency surface wave radar (HFSWR). One component of this arises from a portion of the transmitted radar signal which is reflected from the ionosphere to the ocean surface, from whence it is backscattered to the receiving antennas. The influence of the ionospheric reflection can be accounted for by a so-called ionosphere reflection coefficient (IRC). This paper presents three ionospheric spectral models which may be used to determine clutter power within reasonable limitations.","PeriodicalId":190987,"journal":{"name":"2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115425613","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}
引用次数: 5
Ka-band dual mode circularly polarized reflectarray ka波段双模圆偏振反射天线
2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) Pub Date : 2014-07-13 DOI: 10.1109/ANTEM.2014.6887718
Abdelhady Mahmoud, A. Kishk
{"title":"Ka-band dual mode circularly polarized reflectarray","authors":"Abdelhady Mahmoud, A. Kishk","doi":"10.1109/ANTEM.2014.6887718","DOIUrl":"https://doi.org/10.1109/ANTEM.2014.6887718","url":null,"abstract":"A double layers dual mode circularly polarized (CP) reflectarray antenna operating in the ka-band is presented. The reflectarray is center fed by a circularly polarized horn. The antenna is analyzed numerically. Angular rotation technique for a crossed slot array element is used to make phase compensation. An excellent CP performance is achieved with high aperture efficiency and wide band gain bandwidth of 16.5 % for 1.5 dB gain variation.","PeriodicalId":190987,"journal":{"name":"2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129771299","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}
引用次数: 5
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