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2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)最新文献

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Impact of Antenna Element Directivity and Reflection-Interference on Line-of-Sight Multiple Input Multiple Output Terahertz Systems 天线元件方向性和反射干扰对多输入多输出太赫兹系统的影响
2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) Pub Date : 2022-05-29 DOI: 10.23919/AT-AP-RASC54737.2022.9814398
Duschia M. Bodet, J. Jornet
{"title":"Impact of Antenna Element Directivity and Reflection-Interference on Line-of-Sight Multiple Input Multiple Output Terahertz Systems","authors":"Duschia M. Bodet, J. Jornet","doi":"10.23919/AT-AP-RASC54737.2022.9814398","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814398","url":null,"abstract":"Terahertz (THz) communications are envisioned as the future of wireless communications. In order to combat the high path loss experienced by THz signals, beamforming using multiple-input multiple-output (MIMO) systems has been suggested. In this paper, two practical challenges for THz line-of-sight MIMO systems are investigated for the first time: the impact of antenna element directivity and self-induced inter-symbol interference on performance. Additionally, experimental results are presented to verify the findings.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"130 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124249817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
High-Gain Slotted Waveguide Antennas for Wireless THz and Optical Fiber Front-Ends 用于无线太赫兹和光纤前端的高增益开槽波导天线
2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) Pub Date : 2022-05-29 DOI: 10.23919/AT-AP-RASC54737.2022.9814228
Y. N. Wijayanto, K. Paramayudha, A. Kanno
{"title":"High-Gain Slotted Waveguide Antennas for Wireless THz and Optical Fiber Front-Ends","authors":"Y. N. Wijayanto, K. Paramayudha, A. Kanno","doi":"10.23919/AT-AP-RASC54737.2022.9814228","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814228","url":null,"abstract":"We design slotted waveguide antennas and observe their characteristics for application in THz bands. The antenna consists of a rectangular waveguide, radiation slots, and a feeding port. By modifying the number of the radiation slots, the characteristics of the slot waveguide antenna become changed. The antenna gain of up to 17.5 dBi and a beamwidth of 1.8° can be achieved for an operational frequency of 300 GHz bands. The proposed antenna is promising for wireless THz and optical fiber front ends by integrating optical modulators or detectors.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"156 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120990978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
4-Port Microstrip planar resonator for multiband microwave material characterization applications 用于多波段微波材料表征的4端口微带平面谐振器
2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) Pub Date : 2022-05-29 DOI: 10.23919/AT-AP-RASC54737.2022.9814321
S. Raman, A. Skrivervik
{"title":"4-Port Microstrip planar resonator for multiband microwave material characterization applications","authors":"S. Raman, A. Skrivervik","doi":"10.23919/AT-AP-RASC54737.2022.9814321","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814321","url":null,"abstract":"Planar microstrip resonators suitable for material characterization application are presented in this paper. The prototype consists of three resonators fed through four ports in a planar dielectric substrate without any additional resonators. The resonators are working in different frequency regions making it suitable for resonant based characterization at different frequencies using a single prototype. In this proposed work, the overall dimension of the prototype is 100mm x 50mm when fabricated in a 1.6mm thick FR4 epoxy substrate of dielectric constant 4.4 and loss tangent 0.02. The three resonators are operating within their fundamental mode at 900MHz, 1.8GHz and 2.4GHz respectively. The analysis in this work is carried out on the fundamental electrical mode for all the three resonators, but is similar for the higher order modes. The prototype is highly compact and low cost compared to the conventional cavity based resonant characterization techniques.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121320245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Innovative Antenna Solutions for Satellite Telecommunications 卫星通信的创新天线解决方案
2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) Pub Date : 2022-05-29 DOI: 10.23919/AT-AP-RASC54737.2022.9814428
G. M. Battaglia, T. Isernia, A. Morabito, R. Palmeri, R. Vitiello
{"title":"Innovative Antenna Solutions for Satellite Telecommunications","authors":"G. M. Battaglia, T. Isernia, A. Morabito, R. Palmeri, R. Vitiello","doi":"10.23919/AT-AP-RASC54737.2022.9814428","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814428","url":null,"abstract":"The paper deals with high performance scanning antennas for satellite applications. By referring to array antennas, we propose an optimal synthesis approach able to determine the excitations of the array elements that can be reconfigured with tunable metamaterials for the realization of beam scanning. The achieved results are satisfactory and show improvements with respect to benchmark state of the art. Then, slot array antennas have been identified as possible realization technology in conjunction with electrically tunable nanomaterials. A preliminary characterization of the loaded-slot in terms of radiated power is presented.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"186 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124926758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Climate regionalization to assess change in extreme rainfall over Indian subcontinent 评估印度次大陆极端降雨变化的气候区划
2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) Pub Date : 2022-05-29 DOI: 10.23919/AT-AP-RASC54737.2022.9814196
Chandrani Chatterjee, Saurabh Das
{"title":"Climate regionalization to assess change in extreme rainfall over Indian subcontinent","authors":"Chandrani Chatterjee, Saurabh Das","doi":"10.23919/AT-AP-RASC54737.2022.9814196","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814196","url":null,"abstract":"Climate change and resulting increase in extreme events have become major sources of concern for the society today. Rainfall cycle and lightning extremities are among the most evidenced effects of recent climatic changes. However, quantifying the climate change effect over a region is challenging especially for a country like India with such enormous topographic and climatic variabilities. The current work attempted to regionalize Indian subcontinent based on the major climatic factors using machine learning techniques. The resulting regions have showed distinct interrelationship between the climate variable. Two regions showed significant increasing trend in number of extreme rainfall days(>40 mm) whereas, two other showed decreasing trends.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125897691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Detection and localization of shallow buried targets: experimental results 浅埋目标的检测与定位:实验结果
2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) Pub Date : 2022-05-29 DOI: 10.23919/AT-AP-RASC54737.2022.9814271
A. Brancaccio, G. Leone, R. Solimene
{"title":"Detection and localization of shallow buried targets: experimental results","authors":"A. Brancaccio, G. Leone, R. Solimene","doi":"10.23919/AT-AP-RASC54737.2022.9814271","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814271","url":null,"abstract":"Experimental results concerning the detection and localization of shallow buried targets are shown. The imaging method relies on a convenient two dimensional mathematical formulation, in which the third spatial dimension, that is the depth, is neglected. The input data are bistatic measurements, where the source is fixed and the receiving antenna moves onto a plane parallel to the air/ground interface. Each set of spatial measurements is taken at one single frequency. The use of several sets, taken at different frequencies, allows to perform detection and localization with few (undersampled) spatial data.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116069478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Topology Optimization of Plasmonic Device Using Function Expansion Method and CMA-ES 基于函数展开法和CMA-ES的等离子体器件拓扑优化
2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) Pub Date : 2022-05-29 DOI: 10.23919/AT-AP-RASC54737.2022.9814328
Y. Tsuji, K. Morimoto, A. Iguchi, T. Kashiwa
{"title":"Topology Optimization of Plasmonic Device Using Function Expansion Method and CMA-ES","authors":"Y. Tsuji, K. Morimoto, A. Iguchi, T. Kashiwa","doi":"10.23919/AT-AP-RASC54737.2022.9814328","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814328","url":null,"abstract":"In this paper, we present a topology optimization method for designing plasmonic devices. We employ the function expansion method to express a device structure in a design region because arbitrary structure can be expressed with relatively few design variables. In addition, we employ CMA-ES for optimizing the design variables.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122895492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Moving Forward to Real-time Imaging-based Monitoring of Cerebrovascular Diseases Using a Microwave Device: Numerical and Experimental Validation 利用微波装置推进基于实时成像的脑血管疾病监测:数值和实验验证
2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) Pub Date : 2022-05-29 DOI: 10.23919/AT-AP-RASC54737.2022.9814318
D. Rodriguez-Duarte, J. T. Tobon Vasquez, F. Vipiana
{"title":"Moving Forward to Real-time Imaging-based Monitoring of Cerebrovascular Diseases Using a Microwave Device: Numerical and Experimental Validation","authors":"D. Rodriguez-Duarte, J. T. Tobon Vasquez, F. Vipiana","doi":"10.23919/AT-AP-RASC54737.2022.9814318","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814318","url":null,"abstract":"This paper introduces a numerical and experimental assessment of the microwave device capabilities to perform continuous real-time imaging-based monitoring of a brain stroke, exploiting a differential measuring scheme of the scattering matrices and the distorted Born approximation. The device works around 1 GHz and consists of a low-complexity 22-antenna-array composed of custom-made wearable elements. The imaging kernel is built using an average-head reference scenario computed off-line via accurate numerical models and an in-house finite element method electromagnetic solver. The validation follows the progression of emulated evolving hemorrhagic stroke condition, including tests with both an average single-tissue head model and a multi-tissue one in the numerical part and the average scenario in the experimental one. The results show the system’s capacity to localize and track the shape changes of the stroke-affected area in all studied cases.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117253193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Direct Inversion of the MLNG Field Evaluation Operator for Fast Solution of Electromagnetic Scattering Problems 快速求解电磁散射问题的MLNG场评价算子的直接反演
2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) Pub Date : 2022-05-29 DOI: 10.23919/AT-AP-RASC54737.2022.9814295
E. Chernokozhin, A. Boag
{"title":"Direct Inversion of the MLNG Field Evaluation Operator for Fast Solution of Electromagnetic Scattering Problems","authors":"E. Chernokozhin, A. Boag","doi":"10.23919/AT-AP-RASC54737.2022.9814295","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814295","url":null,"abstract":"A method for direct inversion of the EFIE operator is proposed. The method is based on the Multilevel Nonuniform Grid (MLNG) approach, which previously has been successfully used in fast iterative solvers. However, the MLNG approach is also suitable for direct solvers. The efficiency of the method stems from the fact that the direct inversion of MLNG-compressed integral operators reduces to the inversion of banded matrices.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129698078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Stacked metal hole array as an antenna gain enhancer at 300 GHz band 300 GHz波段叠置金属孔阵列天线增益增强器
2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) Pub Date : 2022-05-29 DOI: 10.23919/AT-AP-RASC54737.2022.9814256
Yu Katsuue, Yusuke Tanaka, K. Inagaki, A. Kanno, N. Sekine, Ayumu Yabuki, Junichi Nakajima, S. Hisatake
{"title":"Stacked metal hole array as an antenna gain enhancer at 300 GHz band","authors":"Yu Katsuue, Yusuke Tanaka, K. Inagaki, A. Kanno, N. Sekine, Ayumu Yabuki, Junichi Nakajima, S. Hisatake","doi":"10.23919/AT-AP-RASC54737.2022.9814256","DOIUrl":"https://doi.org/10.23919/AT-AP-RASC54737.2022.9814256","url":null,"abstract":"We demonstrate the stacked metal hole array (MHA) with the gain enhancement bandwidth of 10 GHz at 300 GHz band based on the simulation (CST STUDIO SUITE). The antenna gain enhancement of about 2 dB was obtained by placing the stacked MHA in front of a conical horn antenna.","PeriodicalId":356067,"journal":{"name":"2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128572772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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