IEEE Transactions on Terahertz Science and Technology最新文献_第9页

A Low-Loss Sub-THz Radial Power Divider Based on Circularly Polarized TE11 Mode 基于圆极化TE11模式的低损耗亚太赫兹径向功率分压器

IF 3.9 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-02-13 DOI: 10.1109/TTHZ.2025.3541840

Zhang Dang;Yong Zhang;Hua-Li Zhu;Bo Zhang;Bo Yan;Rui-Min Xu

引用次数: 0

Building a Comprehensive Complex Permittivity Library for THz Radio Planning Using Quasi-Optical Measurements 利用准光学测量建立太赫兹无线电规划综合复介电常数库

IF 3.9 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-02-13 DOI: 10.1109/TTHZ.2025.3541838

Dou Feng;Alperen Sari;Christopher Sumner;Morgan Dryhurst;Matthew Brown;Vanshika Gupta;Jie Qing;Olcay Altıntaş;Alex Bystrov;Costas Constantinou;Stephen M. Hanham;Miguel Navarro-Cía

引用次数: 0

Dispersive Mirror-Based Phase Control in THz Homodyne Systems 基于色散镜的太赫兹纯差系统相位控制

IF 3.9 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-02-06 DOI: 10.1109/TTHZ.2025.3539451

Lisa C. Kreuzer;Nils Surkamp;Niklas Schulz;Valentin J. Wittwer;Martin Hoffmann;Clara J. Saraceno;Thomas Südmeyer;Carsten Brenner;Milan Deumer;Robert B. Kohlhaas;Martin R. Hofmann

{"title":"Dispersive Mirror-Based Phase Control in THz Homodyne Systems","authors":"Lisa C. Kreuzer;Nils Surkamp;Niklas Schulz;Valentin J. Wittwer;Martin Hoffmann;Clara J. Saraceno;Thomas Südmeyer;Carsten Brenner;Milan Deumer;Robert B. Kohlhaas;Martin R. Hofmann","doi":"10.1109/TTHZ.2025.3539451","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3539451","url":null,"abstract":"In this article, we present an alternative sampling approach for continuous-wave terahertz homodyne systems that overcomes limitations regarding the measurement of dispersive samples of currently used techniques. The wavelength-dependent phase-delay mirrors, which were developed for this work, induce a frequency-dependent phase shift of up to <inline-formula><tex-math>$frac{pi }{2}$</tex-math></inline-formula>. This technique allows sampling of the THz-field, by tuning the laser sources in such a way that a constant frequency difference is maintained and the center frequency is shifted. In our configuration, the phase shift between transmitter and receiver arms depends only on the center frequency of the lasers. This allows for replacing the movement of a delay stage with variation of the center frequency to capture a THz trace. Consequently, measurements are not constrained by the speed of the delay line anymore. Furthermore, this phase shift is unaffected by differences in path length within the setup and does not require phase modulators. Prior simulations show that these mirrors achieve a phase shift up to <inline-formula><tex-math>$pi$</tex-math></inline-formula> in the C-band for a difference frequency of 280 GHz, which could be confirmed by our measurements. We successfully demonstrated the first application by measuring sample thickness.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"526-530"},"PeriodicalIF":3.9,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10876761","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-Line-of-Sight 300 GHz Band Wireless Link Enabled by a Frequency Dependent Reflective Surface 由频率相关反射表面实现的非视距300 GHz波段无线链路

IF 3.9 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-02-06 DOI: 10.1109/TTHZ.2025.3539501

Frédéric Dutin;Unai Beaskoetxea Gartzia;Victor Torres;Pascal Szriftgiser;Jorge Teniente;Guillaume Ducournau

{"title":"Non-Line-of-Sight 300 GHz Band Wireless Link Enabled by a Frequency Dependent Reflective Surface","authors":"Frédéric Dutin;Unai Beaskoetxea Gartzia;Victor Torres;Pascal Szriftgiser;Jorge Teniente;Guillaume Ducournau","doi":"10.1109/TTHZ.2025.3539501","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3539501","url":null,"abstract":"Reconfigurable intelligent surface is a promising technology for the up-coming sixth-generation (6G) of cellular communication networks. In this context, an experimental study of specular and nonspecular reflections of a reflective surface (RS) by scattering parameter measurements in the 300 GHz range is presented. Here, we compare the insertion loss of a fixed and passive RS at its optimal output deflection angle with respect to the specular reflection on a metallic plate. We propose a methodology to assess the losses induced by the surface and validate the use of the device within a THz link. At its best, around 290 GHz, the surface insertion loss is less than 3 dB compared to the metallic plate. We then investigate a non-line-of-sight (LoS) THz link operating in QSPK and QAM-16 coherent transmission using the RS. Data rates up to 10 Gbits/s for QSPK and 20 Gbits/s for QAM-16 are obtained. This is, to the best authors knowledge, the first demonstration of a NLoS THz data-link including such RS.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"400-411"},"PeriodicalIF":3.9,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10876801","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Terahertz Wide-Angle Beam-Steering 3D-Printed Dual-Polarized GRIN Lens With Planar Focal Surface 一种太赫兹广角光束导向平面焦面的3d打印双偏振GRIN透镜

IF 3.9 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-02-06 DOI: 10.1109/TTHZ.2025.3539503

Yue Guo;Fanyi Meng;Kaixue Ma;Jianli Ma;Yu Luo

{"title":"A Terahertz Wide-Angle Beam-Steering 3D-Printed Dual-Polarized GRIN Lens With Planar Focal Surface","authors":"Yue Guo;Fanyi Meng;Kaixue Ma;Jianli Ma;Yu Luo","doi":"10.1109/TTHZ.2025.3539503","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3539503","url":null,"abstract":"A terahertz gradient-index (GRIN) dual-polarized lens with wide-angle beam-steering is designed in this article. A novel GRIN distribution is designed by superimposing the refractive index of the Luneburg lens and the Gutman lens to expand the beam-steering angle. The effects of the superposition ratio of Luneburg lens and Gutman lens <inline-formula><tex-math>${bm{ }}$</tex-math></inline-formula> on the scanning performance of GRIN lens are studied. The novel GRIN distribution is provided for two different purposes. The lens has good scanning performance with a planar feed, and dual polarization can be achieved. High-precision 3-D printing technology is utilized to fabricate the proposed lens to verify the proposed GRIN distribution. A GRIN lens with an aperture size of 8 mm × 8 mm and a thickness of 6.4 mm was manufactured. The proposed lens is measured to validate the implementation method at 220 GHz. The results show that the proposed GRIN lens has a wide beam scanning angle of ±39° and ±38° in vertical polarization and horizontal polarization, respectively. The lens has a peak gain of 19.2 dBi. The scanning losses of the lens are 0.5 dB for vertical polarization and 0.7 for horizontal polarization, respectively.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"519-525"},"PeriodicalIF":3.9,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","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 FDTD-PIC Scheme for Accurate Transient Analysis of Terahertz Gyrotrons 一种用于太赫兹回旋管瞬态精确分析的FDTD-PIC新方案

IF 3.9 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-02-06 DOI: 10.1109/TTHZ.2025.3539444

Runfeng Tang;Xianfei Chen;Liangqian Xie;Weijian Liu;Chenxi He;Xiaotao Han;Andrei V. Savilov;Mikhail Yu Glyavin;Houxiu Xiao

{"title":"A Novel FDTD-PIC Scheme for Accurate Transient Analysis of Terahertz Gyrotrons","authors":"Runfeng Tang;Xianfei Chen;Liangqian Xie;Weijian Liu;Chenxi He;Xiaotao Han;Andrei V. Savilov;Mikhail Yu Glyavin;Houxiu Xiao","doi":"10.1109/TTHZ.2025.3539444","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3539444","url":null,"abstract":"As the resonant frequencies advance into the terahertz regime, the mode competition in the gyrotron becomes increasingly intense, exhibiting atypical and varied transient processes. Consequently, rigorous time-domain simulation is crucial for developing terahertz gyrotrons. Traditional dedicated codes typically utilize the gyroaveraged method to address fast time-scale behaviors. However, this approach may lead to misinterpretation when analyzing transient processes involving modes with different response properties and multiscale behaviors, such as harmonic and gyro-backward-wave oscillator (BWO) operations. To address this challenge, this article directly analyzes the dynamic behavior of various modes based on fast-varying field variables without any time-scale assumption, ensuring a precise depiction of beam-wave interactions. The proposed numerical framework integrates a scalar 1-D finite difference time domain (FDTD) method with a 3-D particle-in-cell algorithm, providing a comprehensive description of full-wave physics. The simplified 1-D FDTD model, along with the preselection of relevant modes, significantly reduces data storage requirements. A thorough validation of the proposed numerical framework demonstrates that the results align well with those obtained from established dedicated codes, showcasing superior accuracy in transient analysis.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"496-504"},"PeriodicalIF":3.9,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrated Broadband THz Switching Using Photoconductivity Modulation in Si-on-Sapphire Substrates 基于硅-蓝宝石衬底光导调制的集成宽带太赫兹开关

IF 3.9 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-02-03 DOI: 10.1109/TTHZ.2025.3537460

Peizhao Li;Weifeng Wu;Yu Shi;Yijing Deng;Kavan Dave;Patrick Fay;Lei Liu

{"title":"Integrated Broadband THz Switching Using Photoconductivity Modulation in Si-on-Sapphire Substrates","authors":"Peizhao Li;Weifeng Wu;Yu Shi;Yijing Deng;Kavan Dave;Patrick Fay;Lei Liu","doi":"10.1109/TTHZ.2025.3537460","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3537460","url":null,"abstract":"We report the first experimental demonstration of an alternative approach for achieving integrated broadband terahertz (THz) switching functionality, based on photoconductivity modulation in thin film Si on low-loss sapphire substrates. By employing a silicon thin film mesa (14 × 14 μm2) on a silicon-on-sapphire (SoS) substrate (with 1.5-<italic>μm-thick silicon and 600-<italic>μm-thick sapphire), an optically-controlled THz switch integrated with low-loss coplanar waveguide transmission lines operating from 110 to 220 GHz has been designed, fabricated, and characterized. To control the switch in this prototype demonstration, a 915 nm laser diode was used to illuminate the silicon mesa through an optical fiber. The switch performance was measured on-wafer in both <italic>D- and <italic>G-band; an average <sc>on-state insertion loss of ∼3.5 dB (with minimum insertion loss of 2.5 and 1.8 dB at 160 and 200 GHz), and an off-state isolation greater than 20 dB across the entire frequency range have been achieved. This performance can be further greatly improved, and is comparable to or better than competing approaches, with the advantage that this approach allows seamless integration of the switch with passive components on low-loss sapphire substrates. This makes the reported approach promising for developing high-performance and compact THz switches for next-generation adaptive circuits and systems.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"536-540"},"PeriodicalIF":3.9,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

WR-4.3 and WR-2.8 Band Waveguide Filters Using Micro Deformed Dual-Mode Cylindrical Resonators 使用微变形双模圆柱谐振器的WR-4.3和WR-2.8带波导滤波器

IF 3.9 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-01-31 DOI: 10.1109/TTHZ.2025.3537467

Keqing Wang;Xiaozhu Wen;Guanghua Shi;Zhen Wang;Anxue Zhang;Yang Yu;Cheng Guo

{"title":"WR-4.3 and WR-2.8 Band Waveguide Filters Using Micro Deformed Dual-Mode Cylindrical Resonators","authors":"Keqing Wang;Xiaozhu Wen;Guanghua Shi;Zhen Wang;Anxue Zhang;Yang Yu;Cheng Guo","doi":"10.1109/TTHZ.2025.3537467","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3537467","url":null,"abstract":"This letter presents two WR-4.3 and WR-2.8 band fourth order waveguide dual-mode filters, fabricated by micro metal additive manufacturing technology. For the first time, microdeformed TM110 dual-mode cylindrical resonators are employed to realize both mode coupling and frequency tuning. This structure is more compatible with additive manufacturing. One filter centered at 220 GHz has a bandwidth of 4.5% (referred to as filter A), while another one centered at 340 GHz has a bandwidth of 1.2% (referred to as filter B). To achieve tuning and coupling, a rectangular iris structure integrated with the cylindrical resonator is introduced. Compared to classical structures, such as inserting screws or using local small perturbations, the proposed design utilizes a globally distributed small deformation, minimizing abrupt features in the cavities. This approach significantly reduces sensitivity to random manufacturing errors, resulting in good agreement between theoretical and fabricated results. The best measured return loss within the passband is 19 dB for filter A and 13.5 dB for filter B, while the insertion loss is 0.5 dB for filter A and 1.7 dB for filter B. The average center frequency shift is about 0.1% of 220 GHz and 0.35% of 340 GHz, respectively.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"531-535"},"PeriodicalIF":3.9,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Micromachined High Gain Diagonal Horn Array Antenna With Suppressed Grating Lobes for 190 GHz-250 GHz 190 GHz-250 GHz抑制光栅瓣的微机械高增益对角喇叭阵列天线

IF 3.9 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-01-30 DOI: 10.1109/TTHZ.2025.3536329

Yun Zhao;Shao-Min Zhang;Fan Ye;Sheng Li;Shi-Cheng Yang;Cai-Xia Wang;Jiang-Qiao Ding

{"title":"Micromachined High Gain Diagonal Horn Array Antenna With Suppressed Grating Lobes for 190 GHz-250 GHz","authors":"Yun Zhao;Shao-Min Zhang;Fan Ye;Sheng Li;Shi-Cheng Yang;Cai-Xia Wang;Jiang-Qiao Ding","doi":"10.1109/TTHZ.2025.3536329","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3536329","url":null,"abstract":"This article presents a high gain, broadband silicon micromachined diagonal horn array antenna for the 190 to 250 GHz frequency band. The antenna array is configured to be built from 34 silicon layers. The upper 25 layers of silicon wafers create an 8 × 8 diagonal horn array antenna and the lower 9 layers form the feed network. The diagonal horn is selected as a radiation element for its 45° polarization direction, which suppresses side and grating lobes in the <italic>E-plane and <italic>H-plane after array formation. Polarization converters are innovatively employed in the feed network to resolve the issue of opposite polarization from waveguide T-junctions. In order to meet the silicon micromachining criteria, all diagonal horns and the feed network are step-profiled designed based on silicon wafer thickness. The 34 silicon layers are aligned and fixed by computer numerical control-milling metal tooling. Monte Carlo analysis is utilized to quantify the interlayer offset errors introduced during the assembly of the wafers. The measurement results are within the error allowance. The antenna achieves a peak gain of 30.9 dBi and a working frequency bandwidth of 27%. Characterized by highly directive radiation patterns with low side lobe levels in the <italic>E-plane and <italic>H-plane, the antenna is well-suited for next-generation THz point-to-point communication systems.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"464-472"},"PeriodicalIF":3.9,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Interlaboratory Comparison of On-Wafer S-Parameter Measurements up to 1.1 THz 高达1.1太赫兹的片上s参数测量的实验室间比较

IF 3.9 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2025-01-30 DOI: 10.1109/TTHZ.2025.3537461

Faisal Ali Mubarak;Gia Ngoc Phung;Uwe Arz;Kamel Haddadi;Isabelle Roch-Jeune;Guillaume Ducournau;Thomas Flisgen;Ralf Doerner;Djamel Allal;Divya Jayasankar;Jan Stake;Robin Schmidt;Gavin Fisher;Nick M. Ridler;Xiaobang Shang

{"title":"An Interlaboratory Comparison of On-Wafer S-Parameter Measurements up to 1.1 THz","authors":"Faisal Ali Mubarak;Gia Ngoc Phung;Uwe Arz;Kamel Haddadi;Isabelle Roch-Jeune;Guillaume Ducournau;Thomas Flisgen;Ralf Doerner;Djamel Allal;Divya Jayasankar;Jan Stake;Robin Schmidt;Gavin Fisher;Nick M. Ridler;Xiaobang Shang","doi":"10.1109/TTHZ.2025.3537461","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3537461","url":null,"abstract":"This article reports on an interlaboratory measurement comparison involving on-wafer S-parameter measurements from 10 GHz to 1.1 THz. Seven laboratories are involved, and each participant has measured an individual reference substrate fabricated from a high-resistivity silicon wafer in the same batch. One- and two-port co-planar waveguide (CPW) structures are designed, simulated, and fabricated. The measurements from 10 GHz to 1.1 THz, extending across six frequency bands, are conducted using different equipment in terms of vendors and specifications (e.g., probe pitch size). Despite such differences, this interlaboratory study has shown a generally good agreement between results from different participants when uncertainties are considered. The comparison with simulated reference values demonstrates agreement within 0.08 for <inline-formula><tex-math>$|S_{11}|$</tex-math></inline-formula> and 2 dB for <inline-formula><tex-math>$|S_{21}|$</tex-math></inline-formula> measurements of matched devices up to 1.1 THz. The measurement comparison demonstrates the need for a standardized measurement approach and, with that, a potential to achieve accurate on-wafer CPW measurements up to THz frequencies, underpinning the development of integrated circuits for such high frequencies.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"15 3","pages":"344-358"},"PeriodicalIF":3.9,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10858780","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0