Pub Date : 2024-07-02DOI: 10.1109/TTHZ.2024.3419290
{"title":"IEEE Women in Engineering","authors":"","doi":"10.1109/TTHZ.2024.3419290","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3419290","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"14 4","pages":"550-550"},"PeriodicalIF":3.9,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10582813","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141495044","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}
Pub Date : 2024-07-02DOI: 10.1109/TTHZ.2024.3419309
{"title":"IEEE Transactions on Terahertz Science and Technology Information for Authors","authors":"","doi":"10.1109/TTHZ.2024.3419309","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3419309","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"14 4","pages":"548-549"},"PeriodicalIF":3.9,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10582809","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141495192","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}
Pub Date : 2024-07-02DOI: 10.1109/TTHZ.2024.3419311
{"title":"TechRxiv: Share Your Preprint Research with the World!","authors":"","doi":"10.1109/TTHZ.2024.3419311","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3419311","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"14 4","pages":"551-551"},"PeriodicalIF":3.9,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10582812","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141495056","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}
Pub Date : 2024-07-02DOI: 10.1109/TTHZ.2024.3414771
{"title":"IEEE Transactions on Terahertz Science and Technology Publication Information","authors":"","doi":"10.1109/TTHZ.2024.3414771","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3414771","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"14 4","pages":"C3-C3"},"PeriodicalIF":3.9,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10582814","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141495108","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}
Pub Date : 2024-07-02DOI: 10.1109/TTHZ.2024.3414769
{"title":"IEEE Microwave Theory and Techniques Society Information","authors":"","doi":"10.1109/TTHZ.2024.3414769","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3414769","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"14 4","pages":"C2-C2"},"PeriodicalIF":3.9,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10582810","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141495294","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}
Pub Date : 2024-07-02DOI: 10.1109/TTHZ.2024.3419313
{"title":"IEEE Open Access Publishing","authors":"","doi":"10.1109/TTHZ.2024.3419313","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3419313","url":null,"abstract":"","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"14 4","pages":"552-552"},"PeriodicalIF":3.9,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10582811","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141494981","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}
Pub Date : 2024-06-28DOI: 10.1109/TTHZ.2024.3420760
Naoki Tanaka;Yasuaki Monnai
As the demand for high-speed communications grows, terahertz waves emerge as a promising frontier for 6G and beyond, offering unprecedented bandwidths. However, their shorter wavelengths result in significantly higher diffraction losses compared to microwaves, necessitating innovative solutions for directional beam steering to counteract these losses. Conventional large-aperture phased arrays face challenges at terahertz frequencies due to the lack of practical phase shifters. To address this challenge, this study introduces a novel 2-D beam steering technique employing a microdisplacement controlled leaky-wave structure. By exploiting the dispersion relation of waves propagating between quasiparallel metal plates, we effectively manipulate the wave trajectory and launch angle via precise displacement and tilt of the plates. Our experimental demonstration achieves effective 2-D terahertz beam steering, eliminating the need for frequency sweeping. At 280 GHz, we achieve a steering range of ${bf pm ! 37^{circ }}$ horizontally with a plate tilt of ${bf pm 0.169^circ }$ and ${bf 18^{circ }}$ vertically with a plate translation of 0.2 mm, along with a 3 dB frequency bandwidth of 9.7 GHz and a 10 dB bandwidth of 17.3 GHz. This method not only circumvents the limitations posed by the lack of phase shifters but also facilitates integration into compact, planar systems without expanding the physical profile. This result paves the way for directionally agile terahertz communications, enabling real-time user and device tracking capabilities.
{"title":"2-D Fixed-Frequency Terahertz Beam Steering With Microactuated Leaky-Wave Structure","authors":"Naoki Tanaka;Yasuaki Monnai","doi":"10.1109/TTHZ.2024.3420760","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3420760","url":null,"abstract":"As the demand for high-speed communications grows, terahertz waves emerge as a promising frontier for 6G and beyond, offering unprecedented bandwidths. However, their shorter wavelengths result in significantly higher diffraction losses compared to microwaves, necessitating innovative solutions for directional beam steering to counteract these losses. Conventional large-aperture phased arrays face challenges at terahertz frequencies due to the lack of practical phase shifters. To address this challenge, this study introduces a novel 2-D beam steering technique employing a microdisplacement controlled leaky-wave structure. By exploiting the dispersion relation of waves propagating between quasiparallel metal plates, we effectively manipulate the wave trajectory and launch angle via precise displacement and tilt of the plates. Our experimental demonstration achieves effective 2-D terahertz beam steering, eliminating the need for frequency sweeping. At 280 GHz, we achieve a steering range of \u0000<inline-formula><tex-math>${bf pm ! 37^{circ }}$</tex-math></inline-formula>\u0000 horizontally with a plate tilt of \u0000<inline-formula><tex-math>${bf pm 0.169^circ }$</tex-math></inline-formula>\u0000 and \u0000<inline-formula><tex-math>${bf 18^{circ }}$</tex-math></inline-formula>\u0000 vertically with a plate translation of 0.2 mm, along with a 3 dB frequency bandwidth of 9.7 GHz and a 10 dB bandwidth of 17.3 GHz. This method not only circumvents the limitations posed by the lack of phase shifters but also facilitates integration into compact, planar systems without expanding the physical profile. This result paves the way for directionally agile terahertz communications, enabling real-time user and device tracking capabilities.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"14 5","pages":"599-606"},"PeriodicalIF":3.9,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142165006","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}
Pub Date : 2024-06-26DOI: 10.1109/TTHZ.2024.3419435
Bin Liang;Tianyi Wang;Sishi Shen;Congjing Hao;Defeng Liu;Jinsong Liu;Kejia Wang;Zhengang Yang
Terahertz frequency-modulated continuous wave is an effective tool for nondestructive testing. Occlusion is one of the bottlenecks of current imaging techniques for the nondestructive testing of complex objects. In reflective imaging, surface objects can cause information occlusion of deep defects in the detection direction, thus decreasing the effectiveness of nondestructive testing. In this article, a method of occlusion removal is proposed by using the layered imaging capability of frequency-modulated continuous wave systems. A specific mask is generated from the image of the surface layer, which can cover the shading on the image of the layer behind it. After an isophote-driven, exemplar-based synthetic inpainting process, the effect of the occlusion can be eliminated and the images of each layer can be restored. It is important to note that deep objects cannot be completely occluded and the deep image should have enough feature information for successful restoration. To demonstrate this, we successfully restored the occluded images from overlapping multilayer samples and validated the method in real scenes. The quantitative computational results show that the proposed method can effectively remove the occlusion and restore the images of each layer. The method provides a practical solution to the problem of occlusion that arises in the application field of nondestructive testing for any objects with multiple layers.
{"title":"Occlusion Removal in Terahertz Frequency-Modulated Continuous Wave Nondestructive Testing Based on Inpainting","authors":"Bin Liang;Tianyi Wang;Sishi Shen;Congjing Hao;Defeng Liu;Jinsong Liu;Kejia Wang;Zhengang Yang","doi":"10.1109/TTHZ.2024.3419435","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3419435","url":null,"abstract":"Terahertz frequency-modulated continuous wave is an effective tool for nondestructive testing. Occlusion is one of the bottlenecks of current imaging techniques for the nondestructive testing of complex objects. In reflective imaging, surface objects can cause information occlusion of deep defects in the detection direction, thus decreasing the effectiveness of nondestructive testing. In this article, a method of occlusion removal is proposed by using the layered imaging capability of frequency-modulated continuous wave systems. A specific mask is generated from the image of the surface layer, which can cover the shading on the image of the layer behind it. After an isophote-driven, exemplar-based synthetic inpainting process, the effect of the occlusion can be eliminated and the images of each layer can be restored. It is important to note that deep objects cannot be completely occluded and the deep image should have enough feature information for successful restoration. To demonstrate this, we successfully restored the occluded images from overlapping multilayer samples and validated the method in real scenes. The quantitative computational results show that the proposed method can effectively remove the occlusion and restore the images of each layer. The method provides a practical solution to the problem of occlusion that arises in the application field of nondestructive testing for any objects with multiple layers.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"14 5","pages":"699-707"},"PeriodicalIF":3.9,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142160055","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}
Pub Date : 2024-06-26DOI: 10.1109/TTHZ.2024.3419080
C. Harrison Brodie;Isaac Spotts;Christopher M. Collier
This work explores Bragg structures and superstructures for the terahertz regime that are 3-D printed with two filament materials, i.e., high-impact polystyrene (HIPS) and cyclic olefin copolymer (COC). We show underlying frequency responses that come about due to the material absorption and chosen 3-D printing resolution. A terahertz time-domain spectroscopy analysis shows the favorable low absorption coefficient of COC filament material compared to that of HIPS filament material. Through a demonstration of terahertz Bragg superstructures for both HIPS and COC filament material, we show the contrast in performance and mitigation of undesired absorption for a terahertz photonic element made from COC filament material. The experimental results show agreement with a finite-difference time-domain simulation of the terahertz Bragg superstructures. Through a demonstration of terahertz Bragg structures for both HIPS and COC filament material, we show the effect of printing resolution (over 50–400 μm range) of the terahertz spectral response. Terahertz Bragg structures and superstructures made from COC filament material show great promise for rapid prototyping of terahertz photonic elements.
{"title":"Terahertz Components by Additive Manufacturing: Material and Fabrication Characterizations Realized Through Bragg Structures","authors":"C. Harrison Brodie;Isaac Spotts;Christopher M. Collier","doi":"10.1109/TTHZ.2024.3419080","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3419080","url":null,"abstract":"This work explores Bragg structures and superstructures for the terahertz regime that are 3-D printed with two filament materials, i.e., high-impact polystyrene (HIPS) and cyclic olefin copolymer (COC). We show underlying frequency responses that come about due to the material absorption and chosen 3-D printing resolution. A terahertz time-domain spectroscopy analysis shows the favorable low absorption coefficient of COC filament material compared to that of HIPS filament material. Through a demonstration of terahertz Bragg superstructures for both HIPS and COC filament material, we show the contrast in performance and mitigation of undesired absorption for a terahertz photonic element made from COC filament material. The experimental results show agreement with a finite-difference time-domain simulation of the terahertz Bragg superstructures. Through a demonstration of terahertz Bragg structures for both HIPS and COC filament material, we show the effect of printing resolution (over 50–400 μm range) of the terahertz spectral response. Terahertz Bragg structures and superstructures made from COC filament material show great promise for rapid prototyping of terahertz photonic elements.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"14 5","pages":"745-757"},"PeriodicalIF":3.9,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142159828","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}
Pub Date : 2024-06-21DOI: 10.1109/TTHZ.2024.3417319
Guohao Liu;Xiangkun He;Jiabiao Zhao;Da Li;Hong Liang;Houjun Sun;Daniel M. Mittleman;Jianjun Ma
In the evolving domain of wireless communication, the investigation of the terahertz (THz) frequency spectrum, spanning 0.1–10 THz, has become a critical focus for advancing ultra-high-speed data transmission technologies. The effective deployment of THz wireless communication techniques mandates a complete study of channel performance under various atmospheric conditions, such as rain, fog, cloud, haze, and, notably snow. These environmental elements significantly impact the design of the protocol stack, ranging from physical-layer signal processing to application design and strategic network planning. An in-depth understanding of channel propagation and fading characteristics in real-world environments, especially over ultrawide bandwidths, is crucial. This work presents a comprehensive measurement-based and theoretical investigation of Line-of-Sight (LoS) THz channel performance in snowy conditions. It methodically examines both the empirical and predicted aspects of channel power and bit-error-ratio (BER). The effects of snowfall rate, carrier frequency, ambient temperature, and relative humidity on channel performance are analyzed and discussed. Our findings demonstrate that snowy conditions not only exert power loss but also induce rapid fluctuations in the power levels of the THz channel. Notably, our results reveal an absence of significant multipath effects in these scenarios. This insight highlights the need for further research into the dynamics of snowflake movement and their interaction with THz transmission paths.
{"title":"Impact of Snowfall on Terahertz Channel Performance: Measurement and Modeling Insights","authors":"Guohao Liu;Xiangkun He;Jiabiao Zhao;Da Li;Hong Liang;Houjun Sun;Daniel M. Mittleman;Jianjun Ma","doi":"10.1109/TTHZ.2024.3417319","DOIUrl":"https://doi.org/10.1109/TTHZ.2024.3417319","url":null,"abstract":"In the evolving domain of wireless communication, the investigation of the terahertz (THz) frequency spectrum, spanning 0.1–10 THz, has become a critical focus for advancing ultra-high-speed data transmission technologies. The effective deployment of THz wireless communication techniques mandates a complete study of channel performance under various atmospheric conditions, such as rain, fog, cloud, haze, and, notably snow. These environmental elements significantly impact the design of the protocol stack, ranging from physical-layer signal processing to application design and strategic network planning. An in-depth understanding of channel propagation and fading characteristics in real-world environments, especially over ultrawide bandwidths, is crucial. This work presents a comprehensive measurement-based and theoretical investigation of Line-of-Sight (LoS) THz channel performance in snowy conditions. It methodically examines both the empirical and predicted aspects of channel power and bit-error-ratio (BER). The effects of snowfall rate, carrier frequency, ambient temperature, and relative humidity on channel performance are analyzed and discussed. Our findings demonstrate that snowy conditions not only exert power loss but also induce rapid fluctuations in the power levels of the THz channel. Notably, our results reveal an absence of significant multipath effects in these scenarios. This insight highlights the need for further research into the dynamics of snowflake movement and their interaction with THz transmission paths.","PeriodicalId":13258,"journal":{"name":"IEEE Transactions on Terahertz Science and Technology","volume":"14 5","pages":"691-698"},"PeriodicalIF":3.9,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142159804","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：