IEEE Transactions on Terahertz Science and Technology最新文献_第3页

Palm-Sized All-in-One Backward Terahertz-Wave Parametric Oscillator 手掌大小的一体化后向太赫兹波参量振荡器

IF 3.6 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2026-07-01 Epub Date: 2026-03-30 DOI: 10.1109/TTHZ.2026.3679230

Yuma Takida;Kouji Nawata;Hiroaki Minamide

{"title":"Palm-Sized All-in-One Backward Terahertz-Wave Parametric Oscillator","authors":"Yuma Takida;Kouji Nawata;Hiroaki Minamide","doi":"10.1109/TTHZ.2026.3679230","DOIUrl":"https://doi.org/10.1109/TTHZ.2026.3679230","url":null,"abstract":"We have developed an over 10-W peak-power, continuously frequency tunable backward terahertz (THz)-wave parametric oscillator (BW-TPO) in a palm-sized compact package. The driving pump source of a passively Q-switched 1064-nm Nd:YAG microchip laser, the BW-TPO gain medium of a slant-stripe-type periodically poled lithium niobate (PPLN) crystal mounted on a motorized rotation stage, and all the optical components, including a simple layout for injection seeding to the idler wavelength, were assembled as an all-in-one module. To extract the backward-propagating THz-wave output that overlaps with the pump beam line, a thin LN substrate coated with 1064-nm antireflection was used as a dichroic beam splitter with a high reflectivity of more than 90% at 0.3 THz. As a result, the monochromatic THz-wave output with a maximum peak power of 15 W was obtained at 0.33 THz. By tuning the quasi-collinear phase-matching condition via mechanical rotation of the PPLN crystal, continuous frequency tunability from 0.29 to 0.35 THz was achieved. THz-wave reflection imaging measurements were performed using a scan of the whole optical setup including the developed BW-TPO module installed on a 2-axis motorized translation stage. Our results confirm that the stable and robust operation of the robot-mountable compact all-in-one BW-TPO is ready for real-world THz-wave nondestructive sensing applications.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 7","pages":"786-792"},"PeriodicalIF":3.6,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11457781","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148442841","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

Multiband THz Sources Based on Effective-Media Suspended-Strip All-Silicon Technology for D-Band and up to 0.5 THz 基于有效介质悬带全硅技术的d波段和0.5 THz波段多波段太赫兹源

IF 3.6 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2026-07-01 Epub Date: 2026-03-30 DOI: 10.1109/TTHZ.2026.3678155

Amr Samir;Ahmed M. Hegazy;Nick Dechev;Mohamed Basha

{"title":"Multiband THz Sources Based on Effective-Media Suspended-Strip All-Silicon Technology for D-Band and up to 0.5 THz","authors":"Amr Samir;Ahmed M. Hegazy;Nick Dechev;Mohamed Basha","doi":"10.1109/TTHZ.2026.3678155","DOIUrl":"https://doi.org/10.1109/TTHZ.2026.3678155","url":null,"abstract":"The cost and performance of electronic device integration in the terahertz (THz) regime remain key challenges toward the commercialization of communication and sensing systems operating beyond 100 GHz, especially during the research and prototyping phases. Such systems are critical for future high-throughput communication networks (e.g., 6 G sub-THz systems), as well as for applications requiring high radiation power, including material spectroscopy, space exploration, and nondestructive medical imaging. In this work, we combine the concepts of effective-medium (EM) waveguides and suspended waveguides to introduce an all-silicon multiband hybrid integration platform that supports low-loss dielectric passive components with high-quality metallic transitions, enabling off-chip active integration using low-parasitic self-aligning embedded chip packaging and ultra-short wire bonding. The proposed approach addresses current limitations in THz integration and packaging technologies by enabling broadband operation across mmWave and THz frequencies on a single silicon platform. Using deep reactive-ion-etched effective media and double-sided photolithography, extremely low in-plane substrate modal leakage is achieved, allowing multiband THz components to be integrated on the same wafer. The technology is experimentally validated through the implementation of low-power THz sources in the D-band and Y-band using hybrid integration of commercially available planar GaAs Schottky diodes in cascaded frequency multiplier configurations. The demonstrated systems achieve conversion efficiencies of 5% in the D-band and 0.063% at 0.5 THz, validating the feasibility of the proposed hybrid integration platform for multiband THz source development and proving it to be a strong candidate for low-cost, rapid prototyping of multiband THz systems.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 7","pages":"813-828"},"PeriodicalIF":3.6,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148442543","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 220 GHz Filtering Slot Array Antenna Based on Micrometal Additive Manufacturing 基于微金属增材制造的220 GHz滤波槽阵天线

IF 3.6 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2026-07-01 Epub Date: 2026-04-07 DOI: 10.1109/TTHZ.2026.3681628

Xianzhe Ma;Qinlong Li;Guanghua Shi;Sifan Wu;Cheng Guo;Zhen Wang;Zhou Chen;Xiaoming Chen

{"title":"A 220 GHz Filtering Slot Array Antenna Based on Micrometal Additive Manufacturing","authors":"Xianzhe Ma;Qinlong Li;Guanghua Shi;Sifan Wu;Cheng Guo;Zhen Wang;Zhou Chen;Xiaoming Chen","doi":"10.1109/TTHZ.2026.3681628","DOIUrl":"https://doi.org/10.1109/TTHZ.2026.3681628","url":null,"abstract":"A 220 GHz slot array antenna with an integrated filtering response is proposed based on micrometal additive manufacturing (M-MAM) technology. The bottom layer of the antenna structure is a seventh-order all-resonator 1-to-16 filtering power divider. This waveguide feed network can transfer energy to the cavity through coupling slots with the same amplitude and in phase. Then, each cavity excites a 2 × 2 radiation slot subarray at the top layer. The 2 × 2 slot subarray unit can be used to form a larger array, providing flexibility in the size of the array antenna. By using the proposed subarrays, an 8 × 8 slot array antenna is designed and fabricated in accordance with the fabrication process of M-MAM. The surface roughness using M-MAM is measured, and the effects of surface roughness on the feed network as well as array antenna have also been analyzed. Due to the low surface roughness and all metal structure, the array antenna achieves high gain, high aperture efficiency and good filtering response. The filtering array antenna using M-MAM technology is promising for sub-terahertz (sub-THz) applications.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 7","pages":"855-864"},"PeriodicalIF":3.6,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148442601","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

IEEE Transactions on Terahertz Science and Technology Information for Authors IEEE太赫兹科技信息汇刊

IF 3.6 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2026-07-01 Epub Date: 2026-06-23 DOI: 10.1109/TTHZ.2026.3700341

引用次数: 0

IEEE Transactions on Terahertz Science and Technology Publication Information IEEE太赫兹科学与技术学报出版信息

IF 3.6 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2026-07-01 Epub Date: 2026-06-23 DOI: 10.1109/TTHZ.2026.3700343

引用次数: 0

First Analog Linearization of a 300-GHz Power Amplifier: Demonstration and Quantification 300 ghz功率放大器的首次模拟线性化：演示和量化

IF 3.6 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2026-07-01 Epub Date: 2026-04-02 DOI: 10.1109/TTHZ.2026.3679945

Thomas Ufschlag;Benjamin Schoch;Lukas Gebert;Arnulf Leuther;Axel Tessmann;Ingmar Kallfass

{"title":"First Analog Linearization of a 300-GHz Power Amplifier: Demonstration and Quantification","authors":"Thomas Ufschlag;Benjamin Schoch;Lukas Gebert;Arnulf Leuther;Axel Tessmann;Ingmar Kallfass","doi":"10.1109/TTHZ.2026.3679945","DOIUrl":"https://doi.org/10.1109/TTHZ.2026.3679945","url":null,"abstract":"This work demonstrates the first analog linearization of a 300-GHz solid-state power amplifier module using a single class-C stage as a predistorter to counteract gain and phase compression of the main amplifier. The circuit is implemented in a 35-nm indium gallium arsenide metamorphic high-electron-mobility transistor technology, and the large-signal phase behavior of class-C biased amplifiers is characterized at submillimeter-wave frequencies for the first time. Operating the predistorter at its optimum bias improves the output-referred 1-dB compression point of the main amplifier by 1.3–3 dB across 280–317.5 GHz and shifts the <inline-formula><tex-math>$text{1} mathrm{^{circ }}$</tex-math></inline-formula> phase-compression point by 2.9 dB at <inline-formula><tex-math>$text{295} ,text{GHz}$</tex-math></inline-formula>. Under low-drive conditions, modulated measurements at 295 GHz with 1.35 GHz bandwidth show a 0.9 % error vector magnitude reduction and a 7.2 dB adjacent-channel power ratio improvement. These results set new benchmarks for analog predistortion at millimeter-wave and submillimeter-wave frequencies. Furthermore, methods for quantifying error vector magnitude via complex alignment and orthogonal projection, as well as spectral regrowth, are proposed and experimentally validated.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 7","pages":"768-776"},"PeriodicalIF":3.6,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148442863","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

IEEE Women in Engineering IEEE工程女性

IF 3.6 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2026-07-01 Epub Date: 2026-06-23 DOI: 10.1109/TTHZ.2026.3702316

引用次数: 0

Wideband Circularly Polarized Small-Size Triple-Patch LTCC Antenna Array for Terahertz Applications 用于太赫兹应用的宽带圆极化小尺寸三贴片LTCC天线阵列

IF 3.6 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2026-07-01 Epub Date: 2026-04-10 DOI: 10.1109/TTHZ.2026.3682890

Jun Xiao;Qi Gan;Jing Wu;Chong-Zhi Han;Josaphat Tetuko Sri Sumantyo;Qiubo Ye

{"title":"Wideband Circularly Polarized Small-Size Triple-Patch LTCC Antenna Array for Terahertz Applications","authors":"Jun Xiao;Qi Gan;Jing Wu;Chong-Zhi Han;Josaphat Tetuko Sri Sumantyo;Qiubo Ye","doi":"10.1109/TTHZ.2026.3682890","DOIUrl":"https://doi.org/10.1109/TTHZ.2026.3682890","url":null,"abstract":"This article presents a compact, wideband, circularly polarized (CP) antenna array for terahertz (THz) applications using low-temperature cofired ceramic (LTCC) technology. The CP radiation is generated by a novel triple-patch element design that perturbs the electric field inside the metallic cavity, which achieves a wide axial ratio (AR) bandwidth with a miniaturized aperture. Based on the small-size and wideband antenna element, we proposed a compact and wideband synergistic architecture for constructing a CP array configuration. Detailly, a 2 × 2 subarray is constructed based on a quasi-TE330-mode substrate-integrated cavity feeding structure. The configuration minimizes the number of metallic vias and the cavity dimension, consequently enabling low-loss transmission. Owing to the small-size triple-patch CP element, a high aperture efficiency (AE) of 140% within a 0.9 × 0.9 <italic>λ2 effective aperture has been achieved. Furthermore, a 4 × 4 array is implemented by employing a sequential rotation feeding network. The measured results demonstrate an impedance bandwidth of 18.1% (0.130–0.156 THz) and a 3-dB AR bandwidth of 18.6% (0.132–0.159 THz), with a peak AE of 68%, thereby validating its applicability in sub-THz CP arrays. To demonstrate its potential for higher frequency operation, a 0.31-THz element and its corresponding 2 × 2 subarray are designed and analyzed. The proof-of-concept confirms robust performance and favorable scalability, supporting extension from sub-THz to THz CP arrays.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 7","pages":"845-854"},"PeriodicalIF":3.6,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148442306","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

Broadband High-Harmonic Multiplying Gyro-TWT in Terahertz Regime 太赫兹波段宽带高谐波倍增陀螺行波管

IF 3.6 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2026-07-01 Epub Date: 2026-03-11 DOI: 10.1109/TTHZ.2026.3691932

Chao-Hai Du;Feng Zhang;Jia-Ji Feng;Xin-Yin Cao;Ji-Tao Yang

{"title":"Broadband High-Harmonic Multiplying Gyro-TWT in Terahertz Regime","authors":"Chao-Hai Du;Feng Zhang;Jia-Ji Feng;Xin-Yin Cao;Ji-Tao Yang","doi":"10.1109/TTHZ.2026.3691932","DOIUrl":"https://doi.org/10.1109/TTHZ.2026.3691932","url":null,"abstract":"Harmonic multiplying provides a key solution to addressing the shortage of high-frequency driving sources and the strong magnetic field requirements for gyro-TWTs in terahertz band. In this article, broadband harmonic multiplying gyro-TWTs are proposed and theoretically investigated, which enable the use of commercially available G-band solid-state sources as the driver and extends the gyro-TWT operation into unprecedented terahertz regime. The composite interaction circuit with different radii separated by a long drift section is proposed, and the associated nonlinear beam dynamics are analyzed in detail to guide the optimization. Distributed losses and the axis-encircling electron beam are employed to ensure the stable harmonic operation. A magnetic cusp gun with a velocity spread below 1.2% is developed and the cathode thermal profile is characterized, demonstrating the feasibility of the proposed interaction scheme. Finally, numerical simulations demonstrate that stable third and fourth harmonic multiplying are achieved at 80 kV voltage and 1 A current, with 3-dB bandwidths of 10 GHz and 11 GHz around 660 GHz and 865 GHz, corresponding to high efficiencies of 7.68% and 2.61%, respectively. This article demonstrates a practical and realizable route toward broadband, high-power terahertz amplifiers, paving the way for significant advances in terahertz radar and spectroscopic applications.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 7","pages":"793-800"},"PeriodicalIF":3.6,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148442497","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

Experimental Characterization and Dynamic Modeling of THz Channels Under Fog Conditions 雾条件下太赫兹通道的实验表征与动态建模

IF 3.6 2区工程技术

IEEE Transactions on Terahertz Science and Technology Pub Date : 2026-07-01 Epub Date: 2026-03-15 DOI: 10.1109/TTHZ.2026.3693840

Jiabiao Zhao;Kefeng Huang;Xiaoxiang Li;Mingxia Zhang;Peian Li;Wenbo Liu;Jie Yang;Yiming Zhao;Weidong Hu;Jianjun Ma

{"title":"Experimental Characterization and Dynamic Modeling of THz Channels Under Fog Conditions","authors":"Jiabiao Zhao;Kefeng Huang;Xiaoxiang Li;Mingxia Zhang;Peian Li;Wenbo Liu;Jie Yang;Yiming Zhao;Weidong Hu;Jianjun Ma","doi":"10.1109/TTHZ.2026.3693840","DOIUrl":"https://doi.org/10.1109/TTHZ.2026.3693840","url":null,"abstract":"The terahertz (THz) band is a promising candidate for sixth-generation wireless networks, but its deployment in outdoor environments is challenged by meteorological phenomena, particularly fog, which imposes variable and difficult-to-predict channel degradation. This article introduces a dynamic channel model for the THz band explicitly driven by the time-evolving droplet size distribution (DSD) of fog, integrating real-time microphysical sensing to capture variations in the fog microstructure. The model is validated for quasi stationary fog conditions, subject to the operating limits of the microphysical sensor. Experimental measurements were conducted at 220 and 320 GHz in a controlled fog chamber to achieve quasi-stationary states, and a larger room-scale setup to characterize dynamic, nonstationary fog evolution. The results confirm that channel power loss is overwhelmingly dominated by absorption rather than scattering, validating the use of the lower computational complexity Rayleigh approximation below 1 THz. Statistical analysis revealed exceptionally high Rician K-factors, demonstrating that THz channels maintain strong line-of-sight stability even in dense fog. System-level performance analysis shows that degradation in bit error rate is driven by the slow, gradual evolution of the DSD, rather than fast multipath fading. This finding enables the reliable simplification of the THz fog channel into a near-Gaussian channel model with time-varying signal-to-noise ratio. This microphysics-aware approach established here provides the necessary foundation for developing adaptive system designs centered on channel power tracking for robust future THz networks.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 7","pages":"757-767"},"PeriodicalIF":3.6,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148442859","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