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2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)最新文献

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A power divider/combiner realized by ridge gap waveguide technology for millimeter wave applications 采用脊隙波导技术实现的毫米波功率分配器/合成器
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869863
B. Ahmadi, A. Banai
{"title":"A power divider/combiner realized by ridge gap waveguide technology for millimeter wave applications","authors":"B. Ahmadi, A. Banai","doi":"10.1109/MMWATT.2016.7869863","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869863","url":null,"abstract":"A half power divider using ridge gap waveguide technology is realized in millimeter wave frequencies. By machining a piece of metal the divider was fabricated. There is no need to an electrical connection between the divider constitutive parts. The fabricated divider is self-packaged. Cylindrical pins are used in the divider structure for ease of fabrication. Low loss power division and good isolation between ports is measured. Also the measured impedance matching of the divider ports is acceptable. Good agreement between the simulation and measurement is achieved.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129436513","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: 14
Hot-carrier assisted Photo-thermoelectric current using nano-plasmonic structures in GFET 热载流子辅助光热电流在纳米等离子体结构中的应用
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869868
S. A. Amirhosseini, M. Karimi, R. Safian
{"title":"Hot-carrier assisted Photo-thermoelectric current using nano-plasmonic structures in GFET","authors":"S. A. Amirhosseini, M. Karimi, R. Safian","doi":"10.1109/MMWATT.2016.7869868","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869868","url":null,"abstract":"Based on Photo-thermoelectric effect, by illuminating the active area of graphene-based optoelectronic devices, strong electron-electron interactions of the photo-excited carriers along with inherit inefficiency of electron-lattice energy relaxation in graphene, results in a sustained population of hot carriers. Furthermore, according to this effect, using generated hot-carrier temperature profile and thermoelectric power(S)coefficient, produce a net photo-thermoelectric current via the thermoelectric effect. The weakness point of this scenario is optical absorption of graphene. A promising solution to overcome this problem is using plasmonic nanostructures. Here, we show that by using a series of periodic plasmonic grating on top of electrodes, a considerable tunable asymmetry hot carrier profile on the graphene channel can be created. It is shown that by precise design of grating there would be a strong field distribution along one side of graphene sheet, which leads to an increased efficiency and responsivity of graphene-based photodetector. The calculated photo-thermoelectric current (ITEP ) shows 6-fold pattern which is qualitatively similar to photo-thermoelectric patterns in experimental results.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130496369","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 novel plasmonic nanoantenna structure for solar energy harvesting 一种用于太阳能收集的新型等离子体纳米天线结构
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869867
A. Chekini, S. Sheikhaei, M. Neshat
{"title":"A novel plasmonic nanoantenna structure for solar energy harvesting","authors":"A. Chekini, S. Sheikhaei, M. Neshat","doi":"10.1109/MMWATT.2016.7869867","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869867","url":null,"abstract":"In this paper, five different nanoantenna structures, i.e. dipole, bowtie, rounded bowtie, rounded cross bowtie and cross bowtie nanoantennas are investigated for solar energy harvesting. Electrical field enhancement by each structure is investigated when different metals (silver, aluminum, gold, and copper) are used to achieve the best performance for solar energy harvesting. Field enhancement in the gap of the nanoantenna is defined as a figure of merit for comparing these structures. Simulations show that cross bowtie nanoantenna has the best performance for solar energy harvesting in the optical and infrared wavelengths. Moreover, genetic algorithm is used for optimizing nanoantenna geometry through Finite Element Method (FEM). Finally, the effect of thin layer oxidations on the cross bowtie nanoantenna is investigated, and the main fabrication issues such as effect of the manufacturing tolerances on the nanoantenna performance are discussed.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"189 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133826028","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: 13
Tunable whispering-gallery-mode resonance sensor for the detection of dielectric loss of small volume liquid samples 用于检测小体积液体样品介电损耗的可调谐低语通道模式谐振传感器
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869920
S. Naghavi, R. Faraji-Dana
{"title":"Tunable whispering-gallery-mode resonance sensor for the detection of dielectric loss of small volume liquid samples","authors":"S. Naghavi, R. Faraji-Dana","doi":"10.1109/MMWATT.2016.7869920","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869920","url":null,"abstract":"In this paper, a tunable sensor with a decent dynamic range and a superior sensitivity for the detection of dielectric loss of liquid sample droplets in the millimeter-wave frequencies is proposed. The sensor works based on the whispering gallery mode resonances of a dielectric resonator which is coupled to a dielectric waveguide from the bottom. To extract the maximum dynamic range and sensitivity of the sensor, the coupling mechanism between the resonator and the dielectric waveguide has been designed to be controllable by using an adjustable screw. The border of the resonator is the most sensitive area of the sensor because of high interaction between the sample and the resonant fields of the resonator. Theoretical analysis and experimental verification for the proposed sensor are discussed.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132830676","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
THz non-destructive testing for covered defects 覆盖缺陷的太赫兹无损检测
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869913
O. Panahi, Mehrdad Kheyrollahi Kouhanestani, B. Yahyaei, M. Mousavi
{"title":"THz non-destructive testing for covered defects","authors":"O. Panahi, Mehrdad Kheyrollahi Kouhanestani, B. Yahyaei, M. Mousavi","doi":"10.1109/MMWATT.2016.7869913","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869913","url":null,"abstract":"In this paper, a pulsed THz imaging system in normal geometry is presented experimentally and the effect of placing a pinhole in front of a covered sample on image quality has been investigated too. Also, the improvement of image quality by using ray transfer matrix is described theoretically. Finally, by using contour system the results are evaluated and the accuracy of THz imaging system is tested.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117182175","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
Chirality of stacked plasmonic nanorods 叠置等离子体纳米棒的手性
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869919
A. F. Najafabadi, T. Pakizeh
{"title":"Chirality of stacked plasmonic nanorods","authors":"A. F. Najafabadi, T. Pakizeh","doi":"10.1109/MMWATT.2016.7869919","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869919","url":null,"abstract":"The Optical activity of a stacked of Au nanorods based on the coupled dipole approximation is studied thoroughly. It is shown that chirality strongly depends on the spatial phase retardation and the couplings' strength between two plasmonic nanorods. The optimum vertical space for obtaining a tradeoff between phase retardation and the couplings' strength is determined. Moreover, it is shown that by increasing the length of the nanorods, the circular dichroism spectrum experiences a red shift and its amplitude linearly increases. The theoretical results are well supported by the numerical computation.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127902264","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
Design and simulation of a Comb-line fed microstrip antenna array with low side lobe level at 77GHz for automotive collision avoidance radar 77GHz汽车防撞雷达低旁瓣馈电微带天线阵列设计与仿真
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869923
Soheil Yasini, K. Mohammadpour‐Aghdam
{"title":"Design and simulation of a Comb-line fed microstrip antenna array with low side lobe level at 77GHz for automotive collision avoidance radar","authors":"Soheil Yasini, K. Mohammadpour‐Aghdam","doi":"10.1109/MMWATT.2016.7869923","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869923","url":null,"abstract":"This article presents design and simulation of Comb-line fed microstrip antenna array with low side lobe level at 77GHz which will be used in automotive collision avoidance radar. At the first, design of single antenna element will be presented. Then we propose the design of a row of microstrip antenna array with 32 elements and at final a to two-dimensional antenna array with 32 rows will be presented. The goal of design of this antenna is to acquire an appropriate radiation pattern with low side lobe level better than −21dB.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131000365","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: 12
Dynamics of THz angular distribution radiated from air plasma produced by two-color laser pulses 双色激光脉冲产生的空气等离子体辐射太赫兹角分布动力学
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869918
Morteza Karimi Hosseinabadi, F. Jahangiri, A. Niknam, R. Massudi
{"title":"Dynamics of THz angular distribution radiated from air plasma produced by two-color laser pulses","authors":"Morteza Karimi Hosseinabadi, F. Jahangiri, A. Niknam, R. Massudi","doi":"10.1109/MMWATT.2016.7869918","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869918","url":null,"abstract":"Terahertz radiation from interaction of two-color laser pulse with air plasma is theoretically studied. The temporal evolution of THz angular distribution during the interaction is presented for different initial conditions.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125999833","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
Detectivity enhanced IR detectors using metamaterials 利用超材料增强红外探测器的探测能力
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869914
T. Mohamadi, L. Yousefi
{"title":"Detectivity enhanced IR detectors using metamaterials","authors":"T. Mohamadi, L. Yousefi","doi":"10.1109/MMWATT.2016.7869914","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869914","url":null,"abstract":"Using metamaterial structures, a novel Infrared (IR) detector is proposed to operate at the frequency of 180 THz. It has been shown that using metamaterials can concentrate the field in the semiconductor region (here InGaAsSb) resulting in higher absorption and higher detectivity for the IR detector. The proposed structure has been analyzed using full wave numerical methods. The simulation results show a field enhancement as big as 37 in the semiconductor region.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114026066","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
Evaluating the capacity of indoor millimeter wave MIMO system using closed-form Green's function 用闭式格林函数评价室内毫米波MIMO系统的容量
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869927
Mohammad Ali Khosrovani Moghaddam, M. H. Sadrearhami, A. A. Shishegar
{"title":"Evaluating the capacity of indoor millimeter wave MIMO system using closed-form Green's function","authors":"Mohammad Ali Khosrovani Moghaddam, M. H. Sadrearhami, A. A. Shishegar","doi":"10.1109/MMWATT.2016.7869927","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869927","url":null,"abstract":"Indoor communication systems operating at millimeter wave frequencies are getting increasing attention due to their ability of having wider bandwidth and as a result conveying information at higher bit rates. At these systems, the capacity of channel is very important especially where there is no line of sight due to an obstacle. Here we examine the use of a multiple-input multiple-output (MIMO) system in a 2D room with an obstacle at 60 GHz. We estimate the channel by using the closed-form Green's function of the room and show the ability of MIMO to increase the available capacity of the system in the room chiefly behind the obstacle.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126942331","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
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