IEEE Transactions on Terahertz Science and Technology最新文献

{"title":"170–400 GHz Ultra-Wideband and Low-Loss Power Splitter Based on Dielectric Silicon Rib Waveguides","authors":"Zhu Liang;Feifan Han;Zebin Huang;Zhuoyue Wen;Weichao Li;Xiongbin Yu;Xiaofeng Tao","doi":"10.1109/TTHZ.2026.3676177","DOIUrl":"https://doi.org/10.1109/TTHZ.2026.3676177","url":null,"abstract":"In this letter, an ultra-wideband 3-dB power splitter based on all-dielectric high-resistivity silicon rib waveguide is designed, fabricated, and experimentally validated. The device is composed of input–output tapers, an adiabatic tapered coupler, and s-bend rib waveguides. Simulation results indicate that the device achieves an ultra-wide 3-dB bandwidth of 462.6 GHz. Experimental characterization confirms that the splitter exhibits an average insertion loss of 0.32 dB and balanced power division with an absolute imbalance of less than 0.6 dB over the 170–400 GHz range, which covers the full WR-4.3 and WR-2.8 bands. In addition, the proposed 3-dB power splitter device is ideally suited for broadband and low-loss power division and provides a robust and scalable foundation for an integrated terahertz system.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 5","pages":"612-616"},"PeriodicalIF":3.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147734712","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}

{"title":"A 110–170 GHz Stacked-PCB-Based Pyramidal Horn Antenna With Flexible Stacking","authors":"Anyi Tian;Chenxin Liu;Alberto Hernández-Escobar;Takumi Kojima;Hiroyuki Sakai;Kazuaki Kunihiro;Takashi Tomura;Kenichi Okada","doi":"10.1109/TTHZ.2026.3664519","DOIUrl":"https://doi.org/10.1109/TTHZ.2026.3664519","url":null,"abstract":"This article presents a stacked-PCB-based broadband D-band horn antenna with high efficiency fabricated using a conventional PCB process. By replacing the conventional multilayered PCB with multiple stacked single-layer PCBs, the dielectric material inside the horn aperture is removed, and the antenna walls can be formed using vertically aligned through-holes. This architecture enables flexible stacking, allowing the aperture size to be scaled simply by adjusting the number of layers, which in turn scales the antenna gain. These modifications also lead to improved antenna characteristics, including gain and radiation pattern. The measured reflection coefficient remains below −18 dB across the entire D-band (110–170 GHz). The sidelobe is less than −10 dB and cross-polarization discrimination is lower than −30 dB. The gain is measured to be 19.8 <inline-formula><tex-math>$pm$</tex-math></inline-formula> 1.7 dB.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 5","pages":"555-563"},"PeriodicalIF":3.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11395622","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147734720","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}

{"title":"THz Automotive Paint Thickness Sensing Leveraging Physics-Informed Neural Network","authors":"Yida Wu;Songbo Cui;Lin Du;Kaushik Sarker;Zijian Zhang;Jianghao Li;Mingxuan Zhang;Zehao Yang;Li Li;Xiaojun Wu","doi":"10.1109/TTHZ.2026.3656299","DOIUrl":"https://doi.org/10.1109/TTHZ.2026.3656299","url":null,"abstract":"The precise measurement of automotive paint thickness is directly related to the durability of the paint and perfection in appearance of the vehicle body, which in turn may affect the production cost and market competitiveness of the vehicle. How to realize contactless, high-precision and fast inspection of surface paint thickness has become an issue of great concern to the automobile industry. Terahertz (THz) electromagnetic waves have been proven to have strong penetration capabilities for paint materials. The precise measurement of automotive paint thickness deploying THz time-domain spectroscopy (TDS) has demonstrated significant application potentials. However, due to multiple layers of paint and the boundaries between layers being unclear, traditional THz TDS technology combined with model inversion algorithms exhibits significant instability, hindering the application of THz technology in automotive paint thickness measurement. In this work, we propose a physics-informed neural network algorithm, which is constructed entirely based on multilayer perceptron, without introducing any complex steps involving signal preprocessing and training strategies. In addition, we use a deep learning network based on long short-term memory to achieve effective discrimination of reflection signals from paint layers with a minimum thickness difference of 0.5 <inline-formula><tex-math>$mu$</tex-math></inline-formula>m between layers. Notably, the model was deployed with a small training set, and the experiments show that the model is robust and stable on real datasets despite having increased parameters. The result exhibited an improved accuracy of about 3.3 and 4.3 <inline-formula><tex-math>$mu$</tex-math></inline-formula>m for three-layer and five-layer paints, respectively, while making the minimum measurable thickness to 4.5 <inline-formula><tex-math>$mu$</tex-math></inline-formula>m. This experiment promotes further application of THz technology by revalidating the ability of THz TDS to realize nondestructive measurement of paint thickness for automotive painting, addressing the actual need of vehicle production lines.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 5","pages":"515-524"},"PeriodicalIF":3.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147734736","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}

{"title":"IEEE Transactions on Terahertz Science and Technology Publication Information","authors":"","doi":"10.1109/TTHZ.2026.3682169","DOIUrl":"https://doi.org/10.1109/TTHZ.2026.3682169","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 5","pages":"C3-C3"},"PeriodicalIF":3.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11494164","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147734756","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}

{"title":"IEEE Transactions on Terahertz Science and Technology Information for Authors","authors":"","doi":"10.1109/TTHZ.2026.3682167","DOIUrl":"https://doi.org/10.1109/TTHZ.2026.3682167","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 5","pages":"617-618"},"PeriodicalIF":3.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11494163","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147734732","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}

{"title":"220–300 GHz Broadband Multiplier-Integrated Subharmonic Mixer With Wide Saturation Operating Region","authors":"Hailong Guo;Hongji Zhou;Jun Zhou;Shixiong Liang;Tianchi Zhou;Yunjian Wu;Hui Zhang;Ziqiang Yang;Yaxin Zhang","doi":"10.1109/TTHZ.2026.3676572","DOIUrl":"https://doi.org/10.1109/TTHZ.2026.3676572","url":null,"abstract":"This article designs and implements a 220–300 GHz subharmonic mixer with on-chip integrated frequency-multiplying architecture. Compared with conventional mixers, this structure integrates large-anode Schottky diodes with an eightfold diameter relative to the mixing anode as an on-chip frequency-multiplying prestage, effectively mitigating the issue of power imbalance-induced damage in terahertz-band small-anode Schottky diodes during mixing. Experiments demonstrate a conversion loss of 10.5–13.5 dB across 220–300 GHz under room-temperature continuous-wave drive. When the driving power remains within 60–200 mW, the device maintains saturated conversion characteristics while preventing mixer diode burnout.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 5","pages":"597-600"},"PeriodicalIF":3.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147734135","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}

{"title":"Expand Your Network","authors":"","doi":"10.1109/TTHZ.2026.3682196","DOIUrl":"https://doi.org/10.1109/TTHZ.2026.3682196","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 5","pages":"619-619"},"PeriodicalIF":3.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11494161","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147734136","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}

{"title":"All-Dielectric Bandpass Filters for IEEE 802.15.3d Terahertz Communications","authors":"Linxi Chen;Weijie Gao;Mariam Abdullah;Jeffrey Hesler;Christophe Fumeaux;Withawat Withayachumnankul","doi":"10.1109/TTHZ.2025.3647725","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3647725","url":null,"abstract":"As the demand for high-speed terahertz communications grows, bandpass filters become essential for managing the spectrum. However, the development of efficient planar bandpass filters for terahertz frequencies remains limited. This study introduces a new class of terahertz bandpass filters on an all-silicon substrateless platform. The design employs cascaded 2-D and 1-D photonic crystal structures with effective-medium claddings. The proposed approach allows for precise control of the center frequency and bandwidth, providing the flexibility to filter designs that can potentially cover all 69 channels in the IEEE 802.15.3d standard between 252 and 325 GHz. In this work, we demonstrate filter designs for four different channels, with two representative prototypes fabricated and characterized. Experimental results show low insertion loss better than 1.5 dB, high out-of-band rejection beyond 25 dB, flat group delay of 0.25 ns within the passband, and low group delay dispersion around 0.01 <inline-formula><tex-math>$text{ns}^{2}$</tex-math></inline-formula>. Communication experiments confirm the ability of the filter to reshape the terahertz spectrum, suppress out-of-band noise by 17 dB, and improve channel isolation while preserving data integrity. This method provides a promising solution for scalable high-performance filtering in future terahertz communications systems.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 5","pages":"564-573"},"PeriodicalIF":3.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147734753","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}

{"title":"An Ultrathin Broadband High-Efficiency Terahertz Metalens Antenna","authors":"Mingyan Zhong;Yunan Jiang;Qusay Al-Taai;Chong Li","doi":"10.1109/TTHZ.2025.3631605","DOIUrl":"https://doi.org/10.1109/TTHZ.2025.3631605","url":null,"abstract":"This article presents a metalens antenna with bilayer metasurfaces designed for terahertz (THz) applications. The proposed structure incorporates double-split ring resonators (DSRRs) patterned on both sides of a 0.1-mm-thick fused silica substrate. By adjusting the opening angles of the DSRRs and the axial offset angle between the front and back DSRRs, a Fabry–Perot cavity effect is formed. This configuration enables full 2<italic>π</i> phase coverage, broadband polarization conversion, and high transmission efficiency, which have not been achieved with any existing double-layer metasurfaces. The operating principles are verified through numerical simulations and semiempirical models. To experimentally validate the design, a 105×105-element (22 mm × 22 mm) planar metalens is designed and fabricated operating at the center frequency of 270 GHz. The measurement results show a peak gain of 32.5 dBi and a 3-dB gain bandwidth of 31.9%. Free-space measurements using a pair of antennas demonstrate strong beam-focusing capability and system-level performance advantages. The proposed bilayer metasurface thus provides a compact, efficient, and scalable solution for next-generation THz wireless communication and sensing systems.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 5","pages":"547-554"},"PeriodicalIF":3.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147734128","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}

{"title":"A Novel Hybrid-Mode Technique for Multiband Filter Design","authors":"Chad Bartlett;Michael Höft;Yi Wang;Uwe Rosenberg","doi":"10.1109/TTHZ.2026.3659428","DOIUrl":"https://doi.org/10.1109/TTHZ.2026.3659428","url":null,"abstract":"This work reports on the development of a novel technique for producing multiband resonator and filter structures through the use of hybrid electro-magnetic modes (HEM modes). A new filtering structure is introduced in the form of a U-shaped (folded) resonator, making use of hybrid electro-magnetic modes and allowing for the formulation of a highly versatile resonator structure with two poles and two transmission zeros. One of the primary advantages of this U-shaped structure is its ability to create fully controllable transmission zeros throughout the S-parameter response without the need for complex geometries or physical cross-coupling. Examples of the technique are demonstrated and filters with dual-band and triple-band responses are formulated. A prototype of the triple-band filter is fabricated for Y-band (330 to 500 GHz) operation using high-precision milling. The fabricated structure and measured results demonstrate the elegance of the technique for achieving multiband solutions well into the sub-terahertz range. A comparison to existing multiband filters is provided, along with a contrasting of size and performance to the classic Chebyshev design methodology.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"16 5","pages":"574-582"},"PeriodicalIF":3.9,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147734140","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}