Journal of Infrared, Millimeter, and Terahertz Waves最新文献_第3页

Pattern Diversity Based Four-Element Dual-band MIMO Patch Antenna for 5G mmWave Communication Networks 用于 5G 毫米波通信网络的基于模式分集的四元件双频 MIMO 贴片天线

IF 2.9 3区工程技术

Journal of Infrared, Millimeter, and Terahertz Waves Pub Date : 2024-05-10 DOI: 10.1007/s10762-024-00983-0

Waleed Tariq Sethi, Saad Hassan Kiani, Mehre E. Munir, Daniyal Ali Sehrai, Huseyin şerif savci, Dawar Awan

{"title":"Pattern Diversity Based Four-Element Dual-band MIMO Patch Antenna for 5G mmWave Communication Networks","authors":"Waleed Tariq Sethi, Saad Hassan Kiani, Mehre E. Munir, Daniyal Ali Sehrai, Huseyin şerif savci, Dawar Awan","doi":"10.1007/s10762-024-00983-0","DOIUrl":"https://doi.org/10.1007/s10762-024-00983-0","url":null,"abstract":"This study presents a planar dual-band multiple-input multiple-output (MIMO) antenna design for the prospective fifth-generation (5G) frequency bands of 28 and 38 GHz. The antenna element is designed by utilizing a rectangular patch with an offset microstrip feeding technique. A dual-band response is achieved by placing semi-circular slots on each side of the patch element. To tune the frequency response and improve impedance matching, vertical rectangular slits are etched in the rectangular patch and the ground plane, respectively. The results show that the single antenna element offers an impedance bandwidth of 2.52 GHz (26.32–28.84 GHz) and 7.5 GHz (34–41.5 GHz). In addition, a MIMO configuration based on pattern diversity using four antenna elements is designed and fabricated. The designed MIMO configuration achieves an impedance bandwidth of 3 GHz (27–30 GHz) and 5.46 GHz (35.54–41 GHz) at operating bands of 28 and 38 GHz. The peak realized gain for the single element at 28 and 38 GHz is noted to be 7.4 dBi and 7.5 dBi, respectively. Furthermore, the polarization diversity configuration illustrates an isolation of > 15 dB and > 25 dB for the 28 and 38 GHz frequency bands, respectively. Moreover, the MIMO configuration attains appropriate values for the envelope correlation coefficient (ECC) and diversity gain (DG), Total Active Reflection Co-efficient (TARC), Channel Capacity Loss (CCL) and Mean Effective Gain (MEG) for the operating frequency bands. The proposed MIMO system based on results seems to be potential choice for mmwave Ka Band Applications.","PeriodicalId":16181,"journal":{"name":"Journal of Infrared, Millimeter, and Terahertz Waves","volume":"39 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140936507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Hybrid Subterahertz Atmospheric Pressure Plasmatron for Plasma Chemical Applications 用于等离子化学应用的混合式次赫兹大气压力等离子体加速器

IF 2.9 3区工程技术

Journal of Infrared, Millimeter, and Terahertz Waves Pub Date : 2024-05-07 DOI: 10.1007/s10762-024-00987-w

S. V. Sintsov, A. V. Vodopyanov, D. A. Mansfeld, A. P. Fokin, A. A. Ananichev, A. A. Goryunov, E. I. Preobrazhensky, N. V. Chekmarev, M. Yu. Glyavin

引用次数: 0

Static Reflective Surfaces for Improved Terahertz Coverage 提高太赫兹覆盖率的静态反射表面

IF 2.9 3区工程技术

Journal of Infrared, Millimeter, and Terahertz Waves Pub Date : 2024-05-06 DOI: 10.1007/s10762-024-00985-y

Thanh Le, Suresh Singh

{"title":"Static Reflective Surfaces for Improved Terahertz Coverage","authors":"Thanh Le, Suresh Singh","doi":"10.1007/s10762-024-00985-y","DOIUrl":"https://doi.org/10.1007/s10762-024-00985-y","url":null,"abstract":"LoS (Line of Sight) MIMO (Multiple Input Multiple Output) is considered the best way to deliver high-capacity channels for terahertz communications due to the severe attenuation suffered by reflected components. Unfortunately, terahertz links are easily blocked by any obstruction resulting in link breakage. Therefore, it is necessary to provide alternative paths via reflectors. A problem shared by LoS paths and reflected paths (via polished reflectors) is that the channel matrix is rank 1 in the far field. As a result, the achieved capacity is lower than what can theoretically be achieved in a rich multi-path environment. In this work, we simultaneously solve the channel rank problem and the coverage problem by using static reflective surfaces which provide limited scattering of the incident signal in a way that minimizes signal loss but provides multiple paths to the receiver with varying phase. We construct such a surface and characterize the received signal using a terahertz testbed. We show that using our surface, we can improve channel capacity for 2 × 2 LoS MIMO. We also develop a theoretical model for the received signal and show that the reflected capacity matches the measured capacity well.","PeriodicalId":16181,"journal":{"name":"Journal of Infrared, Millimeter, and Terahertz Waves","volume":"31 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140884750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Augmented Reality Terahertz (AR-THz) Sensing and Imaging with Frequency-Modulated Continuous-Wave Radar 利用频率调制连续波雷达进行太赫兹增强现实（AR-THz）传感和成像

IF 2.9 3区工程技术

Journal of Infrared, Millimeter, and Terahertz Waves Pub Date : 2024-04-30 DOI: 10.1007/s10762-024-00984-z

Jean-Paul Guillet, Frédéric Fauquet, Jean Rioult

引用次数: 0

Real-time Monitoring of Hydration Reaction of Theophylline Anhydrous via Terahertz Attenuated Total Reflection Time Domain Spectroscopy 通过太赫兹衰减全反射时域光谱实时监测无水茶碱的水合反应

IF 2.9 3区工程技术

Journal of Infrared, Millimeter, and Terahertz Waves Pub Date : 2024-04-26 DOI: 10.1007/s10762-024-00986-x

Kazuhiro Takahashi, Koichiro Akiyama, Kazuki Horita, Tomoaki Sakamoto, Hiroshi Satozono

{"title":"Real-time Monitoring of Hydration Reaction of Theophylline Anhydrous via Terahertz Attenuated Total Reflection Time Domain Spectroscopy","authors":"Kazuhiro Takahashi, Koichiro Akiyama, Kazuki Horita, Tomoaki Sakamoto, Hiroshi Satozono","doi":"10.1007/s10762-024-00986-x","DOIUrl":"https://doi.org/10.1007/s10762-024-00986-x","url":null,"abstract":"In pharmaceuticals, pseudo-polymorphism, e.g., the existence of hydrate and anhydrous forms, affects their physicochemical characteristics. Therefore, the evaluation of pseudo-polymorphism is one of the most important quality analyses. In this research, we investigate the real-time monitoring of the hydration reaction of theophylline using terahertz attenuated total reflection time domain spectroscopy (THz-attenuated total reflection (ATR)-TDS). We continuously measured a mixture of hydroxypropyl cellulose solution and theophylline anhydrous (TPA) while keeping it pressed to the ATR surface. We observed that the absorption peaks derived from TPA decreased and those derived from theophylline monohydrate (TPM) increased with time, demonstrating that the hydrate reaction of TPA can be monitored. Subsequently, we performed an accurate and quantitative evaluation of the hydration reaction by calculating the temporal changes in the crystal form ratio of TPM based on the changes in its second derivative peak intensity followed by a curve fitting. In addition, we performed real-time monitoring of the reaction using two different pressure mechanisms, finding that using a weight to apply pressure provided better reproducibility than using a screw. This study demonstrates that THz spectroscopy is a useful method for the evaluation of pseudo-polymorphism in pharmaceuticals.","PeriodicalId":16181,"journal":{"name":"Journal of Infrared, Millimeter, and Terahertz Waves","volume":"261 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140802485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Design and Investigation of Compact Backed Mirror Two-Port MIMO Antenna for n257 (30 GHz) 5G Spectrum 面向 n257（30 千兆赫）5G 频谱的紧凑型背反射镜双端口多输入多输出天线的设计与研究

IF 2.9 3区工程技术

Journal of Infrared, Millimeter, and Terahertz Waves Pub Date : 2024-04-18 DOI: 10.1007/s10762-024-00982-1

Aditya Kumar Singh, Ajay Kumar Dwivedi, Chandan Choubey, Vivek Singh

{"title":"Design and Investigation of Compact Backed Mirror Two-Port MIMO Antenna for n257 (30 GHz) 5G Spectrum","authors":"Aditya Kumar Singh, Ajay Kumar Dwivedi, Chandan Choubey, Vivek Singh","doi":"10.1007/s10762-024-00982-1","DOIUrl":"https://doi.org/10.1007/s10762-024-00982-1","url":null,"abstract":"In this article, the designing and analysis of a compact novel dual-port multiple-input multiple-output (MIMO) printed antenna are investigated for 30 GHz mm-wave applications. The single antenna unit is having modified C-shaped radiator and an attached rectangular stub with an overall dimension of 10 × 7 × 0.8 mm3. The dual-element MIMO antenna is achieved by creating a back mirror of the single antenna element around the x-axis. This back mirror composition of the MIMO antenna elements is introducing the high level of inter-element isolation (> 20 dB). The proposed antenna prototype is built on a Roger RT/duriod substrate with a loss tangent (tanδ) of 0.0009 and a relative constant (εrsub) of 2.2. As a way to determine the capabilities of the proposed MIMO antenna, many diversity parameters are computed, including the envelope correlation coefficient (ECC < 0.05), diversity gain (DG > 9.99 dB), channel capacity loss (CCL < 0.2 bits/s/Hz), mean effective gain (MEG < − 3 dB), and total active reflection coefficient (TARC). The suggested MIMO antenna is appropriate for 5G new radio frequency bands under mm-wave communication as it has 8.36% impedance bandwidth across the frequency range of simulated (29.04–31.57 GHz)/measured (28.82–31.30 GHz). The antenna under consideration is constructed, and the simulated outcomes are verified by the measurement results.","PeriodicalId":16181,"journal":{"name":"Journal of Infrared, Millimeter, and Terahertz Waves","volume":"10 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140623796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Performance Evaluation and Experimental Study of a 0.34-THz Folded Waveguide Sheet Beam BWO 0.34-THz 折叠波导片束 BWO 的性能评估和实验研究

IF 2.9 3区工程技术

Journal of Infrared, Millimeter, and Terahertz Waves Pub Date : 2024-03-25 DOI: 10.1007/s10762-024-00980-3

Jibran Latif, Huarong Gong, Zhanliang Wang, Atif Jameel, Shaomeng Wang, Jinjun Feng, Yubin Gong

{"title":"Performance Evaluation and Experimental Study of a 0.34-THz Folded Waveguide Sheet Beam BWO","authors":"Jibran Latif, Huarong Gong, Zhanliang Wang, Atif Jameel, Shaomeng Wang, Jinjun Feng, Yubin Gong","doi":"10.1007/s10762-024-00980-3","DOIUrl":"https://doi.org/10.1007/s10762-024-00980-3","url":null,"abstract":"Terahertz (THz) backward wave oscillators (BWOs) hold immense potential for a broad range of industrial and military applications. This study presents a comparative analysis of 0.34 THz sheet beam (SB) and circular beam (CB) folded waveguide (FWG) BWOs. We examined the design, simulation (CST MWS and PS, HFSS), and performance, revealing that sheet beam BWO outperforms circular beam BWO in terms of interaction impedance, power, efficiency, and bandwidth. Under 20 kV beam voltage and 10 mA beam current conditions, sheet beam BWO achieves 0.47 (Omega ) (0.34 THz) interaction impedance, 0.65 W output power, and a bandwidth of approximately 12 GHz, surpassing the 0.18 (Omega ), 0.23 W, and 8.5 GHz values of circular beam BWO, respectively. Furthermore, this study encompasses the fabrication and thorough characterization of the sheet beam BWO’s slow-wave structure. Experimental validation confirms its effectiveness, with measured (S_{11}) demonstrating reflection below (-)10 dB and (S_{21}) exhibiting transmission above (-)2 dB.","PeriodicalId":16181,"journal":{"name":"Journal of Infrared, Millimeter, and Terahertz Waves","volume":"1 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140300138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Q-Band MIMO Antennas with Circular Polarization for Spatial and Polarization Diversity 用于空间和极化分集的 Q 波段环形极化多输入多输出天线

IF 2.9 3区工程技术

Journal of Infrared, Millimeter, and Terahertz Waves Pub Date : 2024-03-25 DOI: 10.1007/s10762-024-00979-w

{"title":"Q-Band MIMO Antennas with Circular Polarization for Spatial and Polarization Diversity","authors":"","doi":"10.1007/s10762-024-00979-w","DOIUrl":"https://doi.org/10.1007/s10762-024-00979-w","url":null,"abstract":"<h3>Abstract</h3> The present work proposes three MIMO antennas with different configurations for the future applications of wireless communications in the Q-band of the frequency to realize both spatial and polarization diversities. A circularly polarized (CP) printed antenna operating over two frequency bands at 37.8 and 50 GHz is utilized as a single element to construct the proposed MIMO antennas. Two-element MIMO antenna systems arranged in two configurations, side-by-side and face-to-face, are proposed to achieve spatial diversity. Also, a four-element MIMO antenna system is designed to achieve polarization diversity in addition to spatial diversity. The proposed MIMO antenna systems are designed with the aid of the CST simulator. The three MIMO antennas are fabricated and their performance is experimentally evaluated regarding the circular polarization, impedance matching, antenna gain, envelope correlation coefficient (ECC), and diversity gain (DG). The experimental results for the single-element as well as the MIMO antennas come in good agreement with simulation results showing high performance. Both the numerical and experimental investigations reveal that the mutual coupling between any two ports of the proposed MIMO antennas is below (-25 {text{dB}}) . Also, for any two ports it is shown that the ECC is below (1times {10}^{-7}) and the diversity gain is higher than (9.99) . The impedance matching bandwidths (for (left|{S}_{11}right|<-10 {text{dB}}) ) are shown to be (1.53) and (1.88) GHz at (37.8) and (50mathrm{ GHz}) , respectively, and the corresponding 3-dB axial ratio bandwidths are (700) and (130mathrm{ MHz}) , respectively.","PeriodicalId":16181,"journal":{"name":"Journal of Infrared, Millimeter, and Terahertz Waves","volume":"74 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140300446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

$$bar{varvec{S}}$$ Matrix from a Two-Dimensional Slab Covered by Water Drops in W and J Bands: Comparison of a Full-Wave Method with Measurements 水滴覆盖的二维板在 W 波段和 J 波段的 $$bar{varvec{S}}$ 矩阵：全波方法与测量结果的比较

IF 2.9 3区工程技术

Journal of Infrared, Millimeter, and Terahertz Waves Pub Date : 2024-03-12 DOI: 10.1007/s10762-024-00977-y

Christophe Bourlier, Paul Bouquin, Alain Peden, Daniel Bourreau, Nicolas Pinel

引用次数: 0

A Highly Frequency-Selective 3D-Printed Dielectric Structure for the Terahertz Range 用于太赫兹范围的高频选择性三维打印介质结构

IF 2.9 3区工程技术

Journal of Infrared, Millimeter, and Terahertz Waves Pub Date : 2024-03-08 DOI: 10.1007/s10762-024-00973-2

Tobias Kubiczek, Kevin Kolpatzeck, Thorsten Schultze, Jan C. Balzer

引用次数: 0