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2019 Second International Workshop on Mobile Terahertz Systems (IWMTS)最新文献

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THz Passive RFID Tag Based on Dielectric Resonator Linear Array 基于介质谐振器线性阵列的太赫兹无源RFID标签
2019 Second International Workshop on Mobile Terahertz Systems (IWMTS) Pub Date : 2019-07-01 DOI: 10.1109/IWMTS.2019.8823734
A. A. Abbas, M. El-Absi, Ashraf Abuelhaijay, K. Solbach, T. Kaiser
{"title":"THz Passive RFID Tag Based on Dielectric Resonator Linear Array","authors":"A. A. Abbas, M. El-Absi, Ashraf Abuelhaijay, K. Solbach, T. Kaiser","doi":"10.1109/IWMTS.2019.8823734","DOIUrl":"https://doi.org/10.1109/IWMTS.2019.8823734","url":null,"abstract":"In this paper, we propose a solution to mitigate the strong clutter signal for a use in a THz indoor self localization system using a chipless tag based on linear dielectric resonator arrays to enhance the Radar Cross Section (RCS) and therefore increase its detectability. Simulation results are presented for a five elements array separated by $ 0.8lambda$ at 105 GHz where a 18 dB RCS enhancement is achieved. For a multiple tag scenario, seven frequency coded tags that take the binary values from 001 to 111 can be realized by coding bit 1 and 0 by the presence and the absence of three different resonance frequencies in the RCS spectrum, equivalently the presence and the absence of the dielectric resonator array with different dimensions. The tags can be discriminated with a free ambiguity over a wide range of incidence angle of the reader signal of $-/+ 35^{circ}$.","PeriodicalId":126644,"journal":{"name":"2019 Second International Workshop on Mobile Terahertz Systems (IWMTS)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117199975","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
Preliminary Analysis of Candle Flame Impact on THz Electromagnetic Wave Propagation 蜡烛火焰对太赫兹电磁波传播影响的初步分析
2019 Second International Workshop on Mobile Terahertz Systems (IWMTS) Pub Date : 2019-07-01 DOI: 10.1109/IWMTS.2019.8823748
Abdulkader Ghwaji, F. Sheikh, T. Schultze, I. Willms, T. Kaiser
{"title":"Preliminary Analysis of Candle Flame Impact on THz Electromagnetic Wave Propagation","authors":"Abdulkader Ghwaji, F. Sheikh, T. Schultze, I. Willms, T. Kaiser","doi":"10.1109/IWMTS.2019.8823748","DOIUrl":"https://doi.org/10.1109/IWMTS.2019.8823748","url":null,"abstract":"This paper presents a preliminary analysis of candle flame impact on the ultra-broadband terahertz (THz) communication links across a spectrum of interest from 300 GHz to 310 GHz. This approach is based on complex transfer functions extracted from channel measurements using a vector network analyzer (VNA) to study the variations in total received power and phase. The channel measurements are performed in a lecture room under line-of-sight (LoS) environment. By evaluating the results, it turns out that the ray trajectories remain unchanged with candle flame but have slightly altered amplitudes of paths and phases.","PeriodicalId":126644,"journal":{"name":"2019 Second International Workshop on Mobile Terahertz Systems (IWMTS)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121685355","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
Super-Resolution Restoration of Low-Resolution THz Camera Images 低分辨率太赫兹相机图像的超分辨率恢复
2019 Second International Workshop on Mobile Terahertz Systems (IWMTS) Pub Date : 2019-07-01 DOI: 10.1109/IWMTS.2019.8823667
D. Damyanov, B. Friederich, J. Kohl, X. Liu, K. Kolpatzeck, T. Schultze, A. Czylwik, J. Balzer, I. Willms
{"title":"Super-Resolution Restoration of Low-Resolution THz Camera Images","authors":"D. Damyanov, B. Friederich, J. Kohl, X. Liu, K. Kolpatzeck, T. Schultze, A. Czylwik, J. Balzer, I. Willms","doi":"10.1109/IWMTS.2019.8823667","DOIUrl":"https://doi.org/10.1109/IWMTS.2019.8823667","url":null,"abstract":"For the purpose of a high-precision object recognition (OR) system at THz frequencies, a 140 GHz super-resolution imaging system is presented in this paper. Conventional THz camera imaging systems are limited by their pixel numbers resulting in distorted and noisy low-resolution (LR) images hindering the possibility of correct object recognition. In this paper methods for improving the resolution of a 140 GHz camera are proposed based on super-resolution (SR) reconstruction methods typically used for low-cost optical components. The experimental validations are performed with a geometrically complex target.","PeriodicalId":126644,"journal":{"name":"2019 Second International Workshop on Mobile Terahertz Systems (IWMTS)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126354926","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
Tera-Hertz sub-layer object identification using MCA and Dictionary learning 使用MCA和字典学习的太赫兹子层目标识别
2019 Second International Workshop on Mobile Terahertz Systems (IWMTS) Pub Date : 2019-07-01 DOI: 10.1109/IWMTS.2019.8823670
U. M. Thanthrige, A. Sezgin
{"title":"Tera-Hertz sub-layer object identification using MCA and Dictionary learning","authors":"U. M. Thanthrige, A. Sezgin","doi":"10.1109/IWMTS.2019.8823670","DOIUrl":"https://doi.org/10.1109/IWMTS.2019.8823670","url":null,"abstract":"We address the problem of identification of spherical objects, which are inside a layered structure by wireless sensing. Here, the backscatter response is used to identify the objects. It is a task, which is improved as the resolution gets higher. Therefore, to have a better resolution we consider the THz band. However, in the THz surface scattering expands the backscatter response of the layered structure in time. Thus, the backscatter response of the objects and the layered structure superimpose each other. This becomes even more severe due to the limited bandwidth at the receiver. In consequence, the exploitation of sophisticated signal separation methods for improved object identification is required. Therefore, we propose morphological component analysis (MCA), semi-blind MCA (MCA-SB) and singular value decomposition (SVD) methods. The MCA and MCA-SB rely on the sparse representation of signals. Therefore, dictionaries need to be identified to represent each signal components sparsely, while SVD relies on statistical properties of the signals. The simulation results demonstrate that the surface scattering of the layered structure makes the recovery process of the backscatter response of the objects difficult. However, this can be improved by sparse signal processing with suitable dictionary selection even for a weak objects response.","PeriodicalId":126644,"journal":{"name":"2019 Second International Workshop on Mobile Terahertz Systems (IWMTS)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127368171","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
Reducing the Divergence of Vortex Waves with a Lens Tailored to the Utilized Circular Antenna Array 利用圆形天线阵列定制透镜减小旋涡波散度
2019 Second International Workshop on Mobile Terahertz Systems (IWMTS) Pub Date : 2019-07-01 DOI: 10.1109/IWMTS.2019.8823795
M. Hassan, B. Sievert, A. Rennings, D. Erni
{"title":"Reducing the Divergence of Vortex Waves with a Lens Tailored to the Utilized Circular Antenna Array","authors":"M. Hassan, B. Sievert, A. Rennings, D. Erni","doi":"10.1109/IWMTS.2019.8823795","DOIUrl":"https://doi.org/10.1109/IWMTS.2019.8823795","url":null,"abstract":"In this paper, we propose a tailored lens in order to overcome the obstacle of the large beam divergence inherent to vortex waves that are generated by a Uniform Circular Patch Antenna Array (UCA) at 10 GHz. We implemented two lenses. The first one is a combination of 8 identical lenses, and will be called sectorized lens, where each of the sectors conforms to an underlying patch antenna element. The second lens is a smoothed version of the former one, which will be called the rotationally symmetric lens. The simulation results of the two tailored lenses are in agreement with the design expectations and show a rotationally symmetry, which is essential for an unperturbed vortex beam emission. The performance of these two designs will be compared to the patch antenna array without lens and to an ordinary extended elliptical lens. Both designed lenses have a gain of about 15.3 dBi, which is about 5.5 dBi higher than the gain of the bare patch antenna array.","PeriodicalId":126644,"journal":{"name":"2019 Second International Workshop on Mobile Terahertz Systems (IWMTS)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130711052","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
A Compact Measurement Setup for In-Situ Material Characterization in the Lower THz Range 用于低太赫兹范围内原位材料表征的紧凑测量装置
2019 Second International Workshop on Mobile Terahertz Systems (IWMTS) Pub Date : 2019-07-01 DOI: 10.1109/IWMTS.2019.8823700
J. Barowski, Jochen Jebramcik, I. Alawneh, F. Sheikh, T. Kaiser, I. Rolfes
{"title":"A Compact Measurement Setup for In-Situ Material Characterization in the Lower THz Range","authors":"J. Barowski, Jochen Jebramcik, I. Alawneh, F. Sheikh, T. Kaiser, I. Rolfes","doi":"10.1109/IWMTS.2019.8823700","DOIUrl":"https://doi.org/10.1109/IWMTS.2019.8823700","url":null,"abstract":"Frequency Modulated Continuous Wave radar systems offer a very large dynamic measurement range, while at the same time they can be fabricated very compact and cost efficient. Due to this, FMCW-sensors are a feasible alternative to costly measurement equipment like vector network analyzers. Applying calibration techniques and algorithms from the VNA domain, they can also be used to characterize materials with very high precision. At the same time, the short measurement time allows their use in mobile high precision measurement setups. This paper presents such a mobile setup that is easily calibrated an can be used for in-situ material parameter estimation and data collection for e.g. channel models. For this purpose, a SiGe-radar system in the lower THz range from 200 GHz to 250 GHz is used.","PeriodicalId":126644,"journal":{"name":"2019 Second International Workshop on Mobile Terahertz Systems (IWMTS)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124657075","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
IWMTS 2019 Technical Program IWMTS 2019技术计划
2019 Second International Workshop on Mobile Terahertz Systems (IWMTS) Pub Date : 2019-07-01 DOI: 10.1109/iwmts.2019.8823744
{"title":"IWMTS 2019 Technical Program","authors":"","doi":"10.1109/iwmts.2019.8823744","DOIUrl":"https://doi.org/10.1109/iwmts.2019.8823744","url":null,"abstract":"","PeriodicalId":126644,"journal":{"name":"2019 Second International Workshop on Mobile Terahertz Systems (IWMTS)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126372041","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
Wideband Radiation Pattern Measurement of Terahertz Antenna-Integrated Photodiodes by Frequency-Domain Spectroscopy 基于频域光谱的太赫兹天线集成光电二极管宽带辐射方向图测量
2019 Second International Workshop on Mobile Terahertz Systems (IWMTS) Pub Date : 2019-07-01 DOI: 10.1109/IWMTS.2019.8823782
K. Kolpatzeck, X. Liu, B. Friederich, D. Damyanov, L. Häring, T. Schultze, J. Balzer, A. Czylwik
{"title":"Wideband Radiation Pattern Measurement of Terahertz Antenna-Integrated Photodiodes by Frequency-Domain Spectroscopy","authors":"K. Kolpatzeck, X. Liu, B. Friederich, D. Damyanov, L. Häring, T. Schultze, J. Balzer, A. Czylwik","doi":"10.1109/IWMTS.2019.8823782","DOIUrl":"https://doi.org/10.1109/IWMTS.2019.8823782","url":null,"abstract":"In this paper the potential of terahertz frequency-domain spectroscopy (THz-FDS) for wideband radiation pattern measurements of terahertz antennas is demonstrated. To this end, radiation patterns of a commercially available bowtie antenna-integrated photodiode are measured with a frequency resolution of 250MHz from 100 to 400 GHz. Parasitic translation of the antenna during its rotation can be accurately resolved and compensated. Furthermore, by analysis in the time domain, the measurement setup can be examined for unwanted scatterers.","PeriodicalId":126644,"journal":{"name":"2019 Second International Workshop on Mobile Terahertz Systems (IWMTS)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130006718","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
Broadband Detection capability of a Triple Barrier Resonant Tunneling Diode 三势垒共振隧道二极管的宽带探测能力
2019 Second International Workshop on Mobile Terahertz Systems (IWMTS) Pub Date : 2019-07-01 DOI: 10.1109/IWMTS.2019.8823724
K. Arzi, S. Clochiatti, E. Mutlu, Alexander Kowaljow, B. Sievert, D. Erni, N. Weimann, W. Prost
{"title":"Broadband Detection capability of a Triple Barrier Resonant Tunneling Diode","authors":"K. Arzi, S. Clochiatti, E. Mutlu, Alexander Kowaljow, B. Sievert, D. Erni, N. Weimann, W. Prost","doi":"10.1109/IWMTS.2019.8823724","DOIUrl":"https://doi.org/10.1109/IWMTS.2019.8823724","url":null,"abstract":"The monolithic on-chip integration and design of a high current density InP-based Triple Barrier Resonant Tunneling Diode within a bow-tie antenna structure for detection application is presented. The asymmetrical current-voltage characteristics of the Triple Barrier Resonant Tunneling Diode and its small capacitance provide a powerful candidate for THz signal detection. The integration into a planar broadband antenna structure such as a bow-tie design enables realization of a broadband detector from single GHz up to THz frequencies. In this work, experimental data are demonstrated in the frequency range of 75 to 110 GHz and from 220 to 330 GHz.","PeriodicalId":126644,"journal":{"name":"2019 Second International Workshop on Mobile Terahertz Systems (IWMTS)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114216870","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
Endfire Transition from Coplanar Waveguide-to-WR3 Rectangular Waveguide for Monolithic Integration with THz Photodiodes 太赫兹光电二极管单片集成中共面波导到wr3矩形波导的端火跃迁
2019 Second International Workshop on Mobile Terahertz Systems (IWMTS) Pub Date : 2019-07-01 DOI: 10.1109/IWMTS.2019.8823686
S. Makhlouf, B. Khani, T. Haddad, M. Steeg, A. Stöhr
{"title":"Endfire Transition from Coplanar Waveguide-to-WR3 Rectangular Waveguide for Monolithic Integration with THz Photodiodes","authors":"S. Makhlouf, B. Khani, T. Haddad, M. Steeg, A. Stöhr","doi":"10.1109/IWMTS.2019.8823686","DOIUrl":"https://doi.org/10.1109/IWMTS.2019.8823686","url":null,"abstract":"In this paper, an endfire transition from coplanar-torectangular waveguide (CPW-to-WR3) for operation in the WR3band (220-320 GHz) is presented. The transition is designed for providing connectivity between a monolithically integrated InPbased terahertz photodiode (PD) to a WR3 rectangular waveguide. The presented transition is based on a CPW-fed planar dipole antenna designed on InP substrate which placed in the E-plane of the rectangular waveguide. The dipole-based transition converts the direct coupled quasi-TEM CPW mode of the PD output to the $TE_{mathbf{10}}$ mode of the rectangular waveguide. The proposed design provides a simple approach avoiding complex integration and packaging techniques like air bridges, ribbon-bonds, or via holes. Numerical analysis of the designed transition shows a wideband performance with a 3 dB insertion loss (IL) over 88 GHz bandwidth and a 10 dB return loss (RL) over 53 GHz bandwidth within the WR3-band.","PeriodicalId":126644,"journal":{"name":"2019 Second International Workshop on Mobile Terahertz Systems (IWMTS)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122959240","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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