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

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Millimeter-wave imaging: A comparative study 毫米波成像的比较研究
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869922
E. Ranjbar, M. Dehmollaian
{"title":"Millimeter-wave imaging: A comparative study","authors":"E. Ranjbar, M. Dehmollaian","doi":"10.1109/MMWATT.2016.7869922","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869922","url":null,"abstract":"In this paper millimeter-wave imaging of perfectly conducting objects and targets with impedance surfaces within the frequency range of 27–33 GHz is calculated. First, the scattered fields are computed using physical optics approximation. Next, two different imaging methods, holography and standard back-projection techniques are evaluated and compared. The backward-wave reconstruction algorithm is implemented using two dimensional (2D) sampling at a single frequency and the standard back-projection method is implemented using a 1D sampling and multiple frequency points. It is shown that holography can provide a fine detail of structure. However, it needs a larger number of sampling points. On the other hand, the standard back-projection method needs a relatively smaller number of sampling points, showing edges. Finally, a measurement set up working within the frequency range of 8–12 GHz is used to provide an imaging result employing measurement data.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"72 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":"114465450","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
Ultrashort terahertz cross-bar switch based on a graphene plasmonic directional coupler 基于石墨烯等离子体定向耦合器的超短太赫兹交叉开关
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869915
Shahram Bahadori-Haghighi, R. Ghayour, M. Sheikhi
{"title":"Ultrashort terahertz cross-bar switch based on a graphene plasmonic directional coupler","authors":"Shahram Bahadori-Haghighi, R. Ghayour, M. Sheikhi","doi":"10.1109/MMWATT.2016.7869915","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869915","url":null,"abstract":"We propose a new vertical graphene plasmonic directional coupler as a terahertz cross-bar switch. The directional coupler is constructed of two pattern-free graphene plasmonic waveguides. The lateral confinement of surface plasmon polaritons is accomplished based on the similar mechanism used in dielectric loaded waveguides. An ultrashort switching length of 360 nm is obtained at the frequency of 30 THz. A switching voltage of 4.96 V and a very high 3dB bandwidth of more than 110 GHz are also calculated. Three-dimensional finite-difference time-domain simulation of the structure is performed and the results are presented.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"29 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":"126393471","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
Radiation enhancement in unbiased array of CW terahertz photomixer emitters with nano-slit waveguide resonant modes 具有纳米狭缝波导谐振模式的连续波太赫兹光电混合器无偏阵列的辐射增强
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869916
M. J. Mohammad-Zamani, M. Moravvej-Farshi, M. Neshat
{"title":"Radiation enhancement in unbiased array of CW terahertz photomixer emitters with nano-slit waveguide resonant modes","authors":"M. J. Mohammad-Zamani, M. Moravvej-Farshi, M. Neshat","doi":"10.1109/MMWATT.2016.7869916","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869916","url":null,"abstract":"An array of unbiased CW terahertz photomixer emitters based on excitation of different waveguide modes in the bimetallic contact grating is introduced. Unlike previous structures, this emitter does not require any external bias voltage. For photocarrier acceleration it rather makes use of the built-in electrostatic field formed in the vicinity of the Schottky contact (electrode-photoconductor) interface. We show that in the designed emitters with the excitation of the second order guided modes of the subwavelength nano-slit waveguides formed between two adjacent bimetallic gratings, the effective current density is approximately about 8 times that of the structure in absence of the resonance modes with the same beat frequency of 0.5 THz. As a result of this enhancement, the resultant terahertz radiation power increases by more than one order of magnitude. A hybrid numerical simulation method is used to model and analyze this phenomenon.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"1 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":"130360244","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 and improvement of photo-thermoelectric current in waveguide-fed Graphene FETs 波导馈电石墨烯场效应管中光热电电流的分析与改进
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869929
M. Karimi, S. A. Amirhosseini, R. Emadi, R. Safian
{"title":"Analysis and improvement of photo-thermoelectric current in waveguide-fed Graphene FETs","authors":"M. Karimi, S. A. Amirhosseini, R. Emadi, R. Safian","doi":"10.1109/MMWATT.2016.7869929","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869929","url":null,"abstract":"In this article, we determine the elevated temperature of hot carriers in Graphene layer (Tel) in a waveguidefed Graphene FET (GFET) and examine its effect on photo-thermoelectric current that can be sensed at the electrodes of the GFET. Also we introduce an improvement in the Tel and, accordingly, photo-thermoelectric current by adding a second waveguide at the top of the device to produce a coupled mode with the first waveguide. We also suggest that this structure would be able to decrease the size of integrated circuits by enabling coupling and photo-detection to perform simultaneously.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"11 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":"128045834","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
Wideband cloaking by using inhomogeneous nanostructured graphene metasurface for tunable cloaking in the terahertz regime 利用非均匀纳米结构石墨烯超表面在太赫兹波段进行可调谐的宽带隐身
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869864
Elnaz Shokati, N. Granpayeh
{"title":"Wideband cloaking by using inhomogeneous nanostructured graphene metasurface for tunable cloaking in the terahertz regime","authors":"Elnaz Shokati, N. Granpayeh","doi":"10.1109/MMWATT.2016.7869864","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869864","url":null,"abstract":"The ultrathin graphene metasurface is proposed and analyzed as a cloaking shell for cylindrical objects with the aim of wideband tunable scattering cancellation in terahertz (THz) spectrum. This mantle cloak is structured by periodic array of graphene nanopatches. In this paper, it is analytically shown that the metasurface reactance can be tuned from inductive to capacitive, as a function of the graphene's Fermi energy and dimensions of nanopatches, that provide the possibility of cloaking both dielectric and conductor cylinders. The appropriate Fermi energy and dimensions are obtained by optimization. To provide wideband invisibility, we use inhomogeneous graphene nanopatches, that we could significantly increase the 3-dB bandwidth approximately 8 times more than the homogeneous metasurface. These resultes have great interest for efficient invisibility, low noise THz sensing and communication systems and networks.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"45 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":"125615409","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
A 77 GHz stepped diffractive dielectric lens with enhanced directivity and reduced SLL 一种具有增强指向性和降低SLL的77 GHz阶跃衍射介质透镜
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869924
Owrang Vosoughi-Niri, K. Mohammadpour‐Aghdam
{"title":"A 77 GHz stepped diffractive dielectric lens with enhanced directivity and reduced SLL","authors":"Owrang Vosoughi-Niri, K. Mohammadpour‐Aghdam","doi":"10.1109/MMWATT.2016.7869924","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869924","url":null,"abstract":"Primary pyramidal horn with a stepped diffractive dielectric lens has been designed to be used in a perimeter radar to shape the required radiation pattern in a band of frequency around 77GHz. A full-wave simulation for this structure indicates directivity improvement and side lobe level (SLL) reduction which is necessary for radar applications. A directivity of 35 dBi or higher and SLL of −17 dB or less have been the goals of the proposed structure and are fulfilled.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"13 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":"132445281","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
A 38 GHz on-chip antenna in 28-nm CMOS using artificial magnetic conductor for 5G wireless systems 用于5G无线系统的38 GHz片上天线，采用28纳米CMOS，采用人工磁性导体
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.21427/D7M23M
M. Hedayati, A. Abdipour, R. S. Shirazi, M. John, M. Ammann, R. Staszewski
{"title":"A 38 GHz on-chip antenna in 28-nm CMOS using artificial magnetic conductor for 5G wireless systems","authors":"M. Hedayati, A. Abdipour, R. S. Shirazi, M. John, M. Ammann, R. Staszewski","doi":"10.21427/D7M23M","DOIUrl":"https://doi.org/10.21427/D7M23M","url":null,"abstract":"This paper presents the first-ever millimeter wave on-chip antenna (AoC) in 28 nm CMOS technology. The addition of artificial magnetic conductor (AMC) can increase the antenna's power gain and radiation efficiency to −1.75 dBi and 22%, respectively, with an occupied area of 0.95 mm×4.75 mm at 38 GHz. This structure is intended for fully integrated single-chip nanometer CMOS transceivers for 5G communication systems.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"1 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":"128938204","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
Terahertz time domain spectroscopy for mixture detection: A quantitative study 太赫兹时域光谱用于混合物检测:定量研究
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869866
O. Panahi, B. Yahyaei, Mehrdad Kheyrollahi Kouhanestani, M. Mousavi, M. Darbani, A. Majde
{"title":"Terahertz time domain spectroscopy for mixture detection: A quantitative study","authors":"O. Panahi, B. Yahyaei, Mehrdad Kheyrollahi Kouhanestani, M. Mousavi, M. Darbani, A. Majde","doi":"10.1109/MMWATT.2016.7869866","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869866","url":null,"abstract":"Terahertz spectroscopy is a useful and an efficient method for detection of pure materials and also mixture compounds. In the present study the terahertz spectra of the α-lactose, high explosives RDX and also the binary mixture of mentioned materials has been obtained in the transition mode. The obtained spectra of the pure materials were in a very good agreement with literatures in the range of 0.1 to 1.5 terahertz. The spectra of mixture samples which show the specific fingerprint characters of each component, declare that terahertz spectroscopy can be used effectively for the detection of explosives and chemical compounds even in the mixture samples.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"40 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":"123718417","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 of low loss waveguide switch using graphene strips at THz frequencies 太赫兹频率下石墨烯条低损耗波导开关的设计
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869925
R. Emadi, As'ad Amirhosseini, M. Karimi, R. Safian, A. Z. Nezhad
{"title":"Design of low loss waveguide switch using graphene strips at THz frequencies","authors":"R. Emadi, As'ad Amirhosseini, M. Karimi, R. Safian, A. Z. Nezhad","doi":"10.1109/MMWATT.2016.7869925","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869925","url":null,"abstract":"In this paper, a surface plasmon (SP) waveguide switch using graphene strip at 30 THz frequency, has been designed and simulated. The waveguide comprise of two graphene strips and the switching is controlled by varying chemical potential of middle strip while outer strips have fix chemical potential. Graphene is doped via back-gate and top-gate voltages. The electrostatic gating is modeled in an electronic solver, while the switching is performed in an electromagnetic solver. The propagation losses of the designed waveguide was shifted to higher frequencies, by doping graphene strips.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"56 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":"126545883","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
Absorption enhancement in tunable graphene based plasmonic absorber 可调谐石墨烯基等离子体吸收体的吸收增强
2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT) Pub Date : 2016-12-01 DOI: 10.1109/MMWATT.2016.7869870
M. Zare, N. Nozhat, Reza Rashiditabar
{"title":"Absorption enhancement in tunable graphene based plasmonic absorber","authors":"M. Zare, N. Nozhat, Reza Rashiditabar","doi":"10.1109/MMWATT.2016.7869870","DOIUrl":"https://doi.org/10.1109/MMWATT.2016.7869870","url":null,"abstract":"In this work, a graphene based plasmonic absorber with two absorption peaks of 0.99 and a wide full width at half maximum (FWHM) between the wavelengths of 1455 and 1610 nm is presented. The proposed absorber is composed of a single layer of graphene that covers the nanostructure with an array of ring and L-shaped grooves on a metal film. The light absorption is more due to the localized surface plasmons (LSPs) resonance in the grooves that reinforces the interaction of light and graphene. Therefore, the absorption of the structure is enhanced. We have shown that the absorber can be tuned by variation of the L-shaped arms length and grooves depth. Moreover, it is possible to create three absorption peaks and have a triple-band absorber in the near-infrared region.","PeriodicalId":294709,"journal":{"name":"2016 Fourth International Conference on Millimeter-Wave and Terahertz Technologies (MMWaTT)","volume":"24 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":"114277245","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
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