2018 First International Workshop on Mobile Terahertz Systems (IWMTS)最新文献

System-Theoretical Modeling and Analysis of Phase Control in a Photonically Steered Terahertz Phased Array Transmitter 光导太赫兹相控阵发射机相位控制系统理论建模与分析

2018 First International Workshop on Mobile Terahertz Systems (IWMTS) Pub Date : 2018-07-02 DOI: 10.1109/IWMTS.2018.8454691

K. Kolpatzeck, Xuan-He Liu, L. Häring, A. Czylwik

{"title":"System-Theoretical Modeling and Analysis of Phase Control in a Photonically Steered Terahertz Phased Array Transmitter","authors":"K. Kolpatzeck, Xuan-He Liu, L. Häring, A. Czylwik","doi":"10.1109/IWMTS.2018.8454691","DOIUrl":"https://doi.org/10.1109/IWMTS.2018.8454691","url":null,"abstract":"The use of photonic phase shift beamforming is highly attractive in terahertz transmitters due to its seamless integration with terahertz generation by photomixing. By feeding several photodiodes with coherent infrared signals with well-defined phase relationships, highly directed and steerable terahertz radiation can be generated. At the same time, the total radiated power is increased by free-space power combining. Since optical phase modulators are readily available in planar lightwave circuit technology and do not need to scale with RF frequency, planar optic integration is simplified compared to photonic true time delay beamforming. However, phase fluctuations due to thermal and mechanical influences become a major issue if fiber-optic components are used and necessitate the implementation of a phase control circuit. Since direct detection of the terahertz phases is not feasible, an alternative approach is needed. In this paper, a concept for controlling the terahertz phases using a lower-frequency reference tone generated by a second set of infrared lasers is proposed and a simplified system-theoretical model is developed and analyzed.","PeriodicalId":267901,"journal":{"name":"2018 First International Workshop on Mobile Terahertz Systems (IWMTS)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132573370","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

Study of 130 nm SiGe HBT Periphery in the Design of 160 GHz Power Amplifier 160ghz功率放大器设计中130nm SiGe HBT外围器件的研究

2018 First International Workshop on Mobile Terahertz Systems (IWMTS) Pub Date : 2018-07-01 DOI: 10.1109/IWMTS.2018.8454697

Abdul Ali, E. Cipriani, T. Johansen, P. Colantonio

引用次数: 8

Terahertz Time-Domain Spectroscopy by Asynchronous Sampling with Modelocked Semiconductor Lasers 锁模半导体激光器异步采样的太赫兹时域光谱学

2018 First International Workshop on Mobile Terahertz Systems (IWMTS) Pub Date : 2018-07-01 DOI: 10.1109/IWMTS.2018.8454698

N. Surkamp, B. Döpke, Y. Hu, C. Brenner, M. Hofmann, A. Klehr, A. Knigge, G. Tränkle

引用次数: 5

A Novel Ray-Tracing Algorithm for Non-Specular Diffuse Scattered Rays at Terahertz Frequencies 一种新的太赫兹非镜面漫射散射射线追踪算法

2018 First International Workshop on Mobile Terahertz Systems (IWMTS) Pub Date : 2018-07-01 DOI: 10.1109/IWMTS.2018.8454694

F. Sheikh, D. Lessy, T. Kaiser

{"title":"A Novel Ray-Tracing Algorithm for Non-Specular Diffuse Scattered Rays at Terahertz Frequencies","authors":"F. Sheikh, D. Lessy, T. Kaiser","doi":"10.1109/IWMTS.2018.8454694","DOIUrl":"https://doi.org/10.1109/IWMTS.2018.8454694","url":null,"abstract":"This paper presents a novel self-programmed three-dimensional (3D) ray-tracing algorithm (RTA) based on Beckmann-Kirchhoff (B-K) model for modeling diffuse scattering mechanism in non-specular directions at terahertz (THz) frequencies. The terahertz or submillimeter-wave frequencies pose unique challenges for channel modeling due to sparse and extreme frequency selective behaviour of the propagation mechanism. In particular, the most critical feature proved to provide important contributions in determining spatial and temporal dispersion in the submillimeter-wave band is the diffuse scattering mechanism, wherein an incident ray may split into a specular and several non-specular (diffused scattered) rays after bouncing off from rough materials. This makes the diffuse scattering or scattering from rough surfaces a necessary design consideration constituting a high proportion of all the propagation rays and hence, must be accounted for propagation modeling to accurately predict channel characteristics. Next, we integrate our MATLAB-based proposed algorithm to a commercial ray-tracing tool to derive a spatiotemporal model of scattered multipath propagation channels considering rough materials in a realistic office environment for both line-of-sight (LoS) and non-line-of-sight (NLoS) scenarios. So far none of the commercially available ray-tracing tools have implemented this scattering model yet.","PeriodicalId":267901,"journal":{"name":"2018 First International Workshop on Mobile Terahertz Systems (IWMTS)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126265859","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: 20

Super-Resolution FMCW Radar System at 60 GHz for 3D Measurements 用于3D测量的60 GHz超分辨率FMCW雷达系统

2018 First International Workshop on Mobile Terahertz Systems (IWMTS) Pub Date : 2018-07-01 DOI: 10.1109/IWMTS.2018.8454688

D. Damyanov, T. Schultze, I. Willms

引用次数: 1

Compact Optoelectronic THz Frequency Domain Spectroscopy System for Refractive Index Determination based on Fabry-Perot Effect 基于Fabry-Perot效应的紧凑光电太赫兹频域光谱系统折射率测定

2018 First International Workshop on Mobile Terahertz Systems (IWMTS) Pub Date : 2018-07-01 DOI: 10.1109/IWMTS.2018.8454695

S. Dülme, N. Schrinski, B. Khani, P. Lu, V. Rymanov, A. Stöhr, C. Brenner, M. Hofmann

{"title":"Compact Optoelectronic THz Frequency Domain Spectroscopy System for Refractive Index Determination based on Fabry-Perot Effect","authors":"S. Dülme, N. Schrinski, B. Khani, P. Lu, V. Rymanov, A. Stöhr, C. Brenner, M. Hofmann","doi":"10.1109/IWMTS.2018.8454695","DOIUrl":"https://doi.org/10.1109/IWMTS.2018.8454695","url":null,"abstract":"In this work, we present a compact optoelectronic THz frequency domain spectroscopy (FDS) system for determination the real part of the refractive index of a semiconductor wafer with a given thickness. The concept is based on the detection of transmission maxima, which appear due to Fabry-Perot interferences inside the wafer and which depend on the refractive index of the semiconductor material. This all-fiber based THz FDS setup consists of two external cavity laser diodes and an uni-traveling-carrier photodiode (UTC-PD) module on the emitter side, while a Schottky barrier diode (SBD) is used as THz receiver. Since we don't need any additional lenses and because of the small device dimensions, this setup is compact in size, compared with traditional bulky TDS systems. We prove our THz FDS concept by characterizing of a semi-insulating iron-doped indium phosphide (InP:Fe) wafers with different thicknesses within a frequency range from 220 GHz up to 450 GHz. Based on the determination of the free spectral range (FSR) between the Fabry-Perot transmission maxima, a refractive index of 3.475 for this frequency region is obtained. Additional THz time domain spectroscopy experiments match the THz FDS results very well and confirm our results. Furthermore, analytic calculations are in excellent agreement with the measurements. A planned transfer of this THz FDS approach to a completely hybrid or monolithic integration of all photonic devices in a compact module could be offer a very small and full mobile THz spectroscopy setup.","PeriodicalId":267901,"journal":{"name":"2018 First International Workshop on Mobile Terahertz Systems (IWMTS)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128908365","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

Photonic Crystal THz High-Q Resonator for Chipless Wireless Identification 无芯片无线识别用光子晶体太赫兹高q谐振器

2018 First International Workshop on Mobile Terahertz Systems (IWMTS) Pub Date : 2018-07-01 DOI: 10.1109/IWMTS.2018.8454693

Alejandro Jiménez-Sáez, M. Schüßler, R. Jakoby, Christopher Krause, F. Meyer, G. V. Bögel

引用次数: 13

Experimental Validation of a Phase Control Concept for Photonically Steered Terahertz Phased Array Transmitters at Microwave Frequencies 微波频率下光导太赫兹相控阵发射机相位控制概念的实验验证

2018 First International Workshop on Mobile Terahertz Systems (IWMTS) Pub Date : 2018-07-01 DOI: 10.1109/IWMTS.2018.8454685

Xuan-He Liu, K. Kolpatzeck, L. Häring, A. Czylwik

引用次数: 1

Millimeter-wave Signal Generation and Detection via the same Triple Barrier RTD and on-chip Antenna 毫米波信号的产生和检测通过相同的三屏障RTD和片上天线

2018 First International Workshop on Mobile Terahertz Systems (IWMTS) Pub Date : 2018-07-01 DOI: 10.1109/IWMTS.2018.8454700

K. Arzi, A. Rennings, D. Erni, N. Weimann, W. Prost, S. Suzuki, M. Asada

引用次数: 5

THz Circuits in CMOS: Dream or Nightmare? CMOS太赫兹电路:梦想还是噩梦?

2018 First International Workshop on Mobile Terahertz Systems (IWMTS) Pub Date : 2018-07-01 DOI: 10.1109/IWMTS.2018.8454686

Kaizhe Guo, W. Steyaert, Alexander Standaert, D. Simic, P. Reynaert

引用次数: 0