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2020 37th National Radio Science Conference (NRSC)最新文献

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Synthesis of Circular Antenna Arrays for Realization of Broadside Chebyshev Linear Array Patterns in the Elevation Plane 圆天线阵列的综合实现在仰角平面上的宽边切比雪夫线阵方向图
2020 37th National Radio Science Conference (NRSC) Pub Date : 2020-09-08 DOI: 10.1109/NRSC49500.2020.9235106
A. Hussein, L. Alnaggar, M. Abd-Elnaby
{"title":"Synthesis of Circular Antenna Arrays for Realization of Broadside Chebyshev Linear Array Patterns in the Elevation Plane","authors":"A. Hussein, L. Alnaggar, M. Abd-Elnaby","doi":"10.1109/NRSC49500.2020.9235106","DOIUrl":"https://doi.org/10.1109/NRSC49500.2020.9235106","url":null,"abstract":"Most of the recent state of the art circular antenna arrays (CAA) synthesis techniques attempted to synthesize the Chebyshev linear array patterns in the azimuth plane. In this paper, a new Genetic algorithm optimization-based technique for Uniform CAAs synthesis to realize a desired Chebyshev pattern in the elevation plane is introduced. The proposed technique maintains the same number of antenna elements as the linear antenna array. While the CAA diameter, elements angular distribution, and elements excitations are optimized to synthesize the desired pattern. The CAA diameter is optimized around the array size of the linear antenna array. And the angular positions of the antenna elements are non-uniformly distributed on the circle circumference using the GA optimization. While a closed-form expression for the corresponding elements excitations is derived to determine these excitations using a deterministic equation solving technique. Several simulations are performed to verify the effectiveness of the proposed technique.","PeriodicalId":6778,"journal":{"name":"2020 37th National Radio Science Conference (NRSC)","volume":"53 1","pages":"30-40"},"PeriodicalIF":0.0,"publicationDate":"2020-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89509598","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
Expert Guided Analog Layout Placement and Routing Automation for Deep Nanotechnologies 专家指导的模拟布局放置和路由自动化的深度纳米技术
2020 37th National Radio Science Conference (NRSC) Pub Date : 2020-09-08 DOI: 10.1109/NRSC49500.2020.9235112
Fady Atef Naguib, S. Ahmed, Soha Hamed, M. Dessouky
{"title":"Expert Guided Analog Layout Placement and Routing Automation for Deep Nanotechnologies","authors":"Fady Atef Naguib, S. Ahmed, Soha Hamed, M. Dessouky","doi":"10.1109/NRSC49500.2020.9235112","DOIUrl":"https://doi.org/10.1109/NRSC49500.2020.9235112","url":null,"abstract":"This paper presents a new analog layout design tool for placement and routing of circuits using innovative template algorithm to decrease the solution space in an effective way then an optimization method to choose the best placement using satisfiability modulo theories SMT linear Solver. This tool is built in a way to consider the most advanced techniques used in today`s industrial products as well today advanced deep nodes to decrease the design cycle and layout iterations. This tool extracts the main sub-blocks types from the schematics then starts processing on each sub-block alone to find the best matching pattern that satisfies the block constraints and estimate the needed routing taking the parasitic into consideration, then using the SMT solver to find the best area to fit the design.","PeriodicalId":6778,"journal":{"name":"2020 37th National Radio Science Conference (NRSC)","volume":"9 1","pages":"240-247"},"PeriodicalIF":0.0,"publicationDate":"2020-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80453745","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
Flexible Patch Antennas on Filter Paper Substrate for Biosensing Applications 生物传感用滤纸基板柔性贴片天线
2020 37th National Radio Science Conference (NRSC) Pub Date : 2020-09-08 DOI: 10.1109/NRSC49500.2020.9235090
A. R. Eldamak, E. Fear
{"title":"Flexible Patch Antennas on Filter Paper Substrate for Biosensing Applications","authors":"A. R. Eldamak, E. Fear","doi":"10.1109/NRSC49500.2020.9235090","DOIUrl":"https://doi.org/10.1109/NRSC49500.2020.9235090","url":null,"abstract":"This paper presents a novel, low cost flexible paper substrate suitable for biosensing applications. A microstrip patch antenna consisting of copper tape foil and a cellulose filter paper as a substrate with thickness of 180 μm is fabricated and tested. The substrate has measured dielectric constant (εr) of 1.9 and losses (tan δ ) of 0.025. For 3.8 GHz resonance, the antenna has size of 29.5 mm x 38 mm on a ground plane of 50 mm x 60 mm. Measurements of the final design are in excellent agreement with simulations. Moreover, measurements of the patch antenna on the proposed substrate (cellulose filter paper) collected at different bending radii and folding angles demonstrate performance consistency.","PeriodicalId":6778,"journal":{"name":"2020 37th National Radio Science Conference (NRSC)","volume":"177 1","pages":"41-47"},"PeriodicalIF":0.0,"publicationDate":"2020-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88048370","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
Radar-Cross-Section Reduction Using Polarization Conversion Metasurface 利用偏振转换超表面减小雷达横截面
2020 37th National Radio Science Conference (NRSC) Pub Date : 2020-09-08 DOI: 10.1109/NRSC49500.2020.9235105
M. M. Badawy, S. Zainud-Deen, H. Malhat
{"title":"Radar-Cross-Section Reduction Using Polarization Conversion Metasurface","authors":"M. M. Badawy, S. Zainud-Deen, H. Malhat","doi":"10.1109/NRSC49500.2020.9235105","DOIUrl":"https://doi.org/10.1109/NRSC49500.2020.9235105","url":null,"abstract":"A polarization converter metamaterial surface (PCM) surface is designed for radar-cross-section reduction (RCSR) applications, through this paper. The presented PCM unit-cell composed of crescent shaped metallic patch. It introduces polarization conversion ratio (PCR) of 0.9 in the frequency-band from 8.2 GHz to 11.5 GHz. Different PCM surfaces arrangements uniform, triangle, and square structures are constructed and studied for more RCSR performance. The PCM square arrangement surface involves the rotation of the crescent unit cell with 90, 180 and 270 degrees to enhance the scattered waves cancellation and hence produce more RCSR. It introduces the optimum RCSR of 22.5 dB at 8.7 GHz for normal incident wave. The paper investigates the RCSR from different planar and conformal metallic surfaces loaded with PCM square arrangement. Different radii of surface curvature are investigated.","PeriodicalId":6778,"journal":{"name":"2020 37th National Radio Science Conference (NRSC)","volume":"3 1","pages":"66-73"},"PeriodicalIF":0.0,"publicationDate":"2020-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82240073","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
[Front matter] (前页)
2020 37th National Radio Science Conference (NRSC) Pub Date : 2020-09-08 DOI: 10.1109/nrsc49500.2020.9235110
{"title":"[Front matter]","authors":"","doi":"10.1109/nrsc49500.2020.9235110","DOIUrl":"https://doi.org/10.1109/nrsc49500.2020.9235110","url":null,"abstract":"","PeriodicalId":6778,"journal":{"name":"2020 37th National Radio Science Conference (NRSC)","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86519870","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
NRSC 2020 Tutorial
2020 37th National Radio Science Conference (NRSC) Pub Date : 2020-09-08 DOI: 10.1109/NRSC49500.2020.9235116
A. Shamim
{"title":"NRSC 2020 Tutorial","authors":"A. Shamim","doi":"10.1109/NRSC49500.2020.9235116","DOIUrl":"https://doi.org/10.1109/NRSC49500.2020.9235116","url":null,"abstract":"Provides an abstract of the tutorial presentation and may include a brief professional biography of the presenter. The complete presentation was not made available for publication as part of the conference proceedings.","PeriodicalId":6778,"journal":{"name":"2020 37th National Radio Science Conference (NRSC)","volume":"21 1","pages":"i-iii"},"PeriodicalIF":0.0,"publicationDate":"2020-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76944271","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
Automatic Detection of Exudates and Hemorrhage in Fundus images 眼底图像中渗出物和出血的自动检测
2020 37th National Radio Science Conference (NRSC) Pub Date : 2020-09-08 DOI: 10.1109/NRSC49500.2020.9235099
B. Mohamed
{"title":"Automatic Detection of Exudates and Hemorrhage in Fundus images","authors":"B. Mohamed","doi":"10.1109/NRSC49500.2020.9235099","DOIUrl":"https://doi.org/10.1109/NRSC49500.2020.9235099","url":null,"abstract":"Diabetic Retinopathy disease might lead to total loss of diabetic patient’s sight. In this research, we aim to detect the lesions of the Diabetic Retinopathy including Hemorrhage, and exudates. To be sure that the fundus images are in the same conditions of brightness, we applied Grey World approach on brightness channel then reconstruct the RGB. CLAHE and Unsharp filter are applied on reconstructed green channel and resulted in corrected green channel Gcor. The contrast stretching function is applied on the original green channel to result in stretched green channel Gs. The two images Gcor and Gs, are processed using thresholding and morphology operations to extract and localize optic disk, exudates, blood vessels, micro-aneurysm, Hemorrhage and macula. The color correction steps highlights Diabetic Retinopathy lesions. Sensitivity in our computer Diabetic Retinopathy diagnoses system achieved 94.44 % and outperforms most of current research works.","PeriodicalId":6778,"journal":{"name":"2020 37th National Radio Science Conference (NRSC)","volume":"12 1","pages":"277-284"},"PeriodicalIF":0.0,"publicationDate":"2020-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72984842","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
High-Speed Comparator Design for RF-to-Digital Receivers 射频转数接收机的高速比较器设计
2020 37th National Radio Science Conference (NRSC) Pub Date : 2020-09-08 DOI: 10.1109/NRSC49500.2020.9235091
Ahmed A. Sakr, A. Hussein, G. Fahmy, M. Abdelghany
{"title":"High-Speed Comparator Design for RF-to-Digital Receivers","authors":"Ahmed A. Sakr, A. Hussein, G. Fahmy, M. Abdelghany","doi":"10.1109/NRSC49500.2020.9235091","DOIUrl":"https://doi.org/10.1109/NRSC49500.2020.9235091","url":null,"abstract":"There is an increasing research interest in digitizing the radio frequency (RF) signal directly after the antenna to obtain a flexible wireless software-defined radio (SDR). This is mainly because the next generations, 4G and 5G standards, are allocated different bands for the same standard due to the worsening shortage of the available spectrum. In this paper a high-speed two-stage dynamic CMOS-latched comparator is designed using 65 nm CMOS process. It achieves sampling frequency up to 10 GHz with resolution of 10.11 bits and 13.28 bits at 1 GHz sampling clock while keeping the propagation delay less than 64 psec. for 1 mV input voltage difference. The proposed design targets SDRs based on pulse-width modulation (PWM) and RF sampling analog-to-digital converters (ADCs).","PeriodicalId":6778,"journal":{"name":"2020 37th National Radio Science Conference (NRSC)","volume":"84 1","pages":"207-215"},"PeriodicalIF":0.0,"publicationDate":"2020-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83050325","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
A low power Charge Steering Based Frequency Divider 一种基于低功率电荷转向的分频器
2020 37th National Radio Science Conference (NRSC) Pub Date : 2020-09-08 DOI: 10.1109/NRSC49500.2020.9235096
Mohamed S. Eleraky, Mohamed El Nozahi, E. Hegazi
{"title":"A low power Charge Steering Based Frequency Divider","authors":"Mohamed S. Eleraky, Mohamed El Nozahi, E. Hegazi","doi":"10.1109/NRSC49500.2020.9235096","DOIUrl":"https://doi.org/10.1109/NRSC49500.2020.9235096","url":null,"abstract":"This paper presents a low-power charge steering based frequency divider. This divider is designed for wireless local area networks (WLAN) and the internet of things (IoT) applications. A non-return to zero low power latch is proposed with charge steering logic (CSL) instead of the current source of the conventional current mode logic (CML). Then a master-slave flip flop is implemented using CSL latch. A divide by two circuits is proposed and designed using a 130-nm CMOS process. The frequency divider power consumption at 2.4 GHz, which is the most used frequency band in the WLAN application, is 36 μW from a 1.2-V supply. The sensitivity curve for the proposed divider is also presented. A maximum frequency of 9.6 GHz is achieved with a self-oscillation frequency of 1 GHz.","PeriodicalId":6778,"journal":{"name":"2020 37th National Radio Science Conference (NRSC)","volume":"95 1","pages":"197-206"},"PeriodicalIF":0.0,"publicationDate":"2020-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80604728","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
Tunable Microwave Single-Bandpass Photonic Filter Based on Amplified Mems-Based Gires–Tournois Interferometer 基于放大mems光栅- tournois干涉仪的可调谐微波单带通光子滤波器
2020 37th National Radio Science Conference (NRSC) Pub Date : 2020-09-08 DOI: 10.1109/NRSC49500.2020.9235092
H. Kotb, Y. Sabry, M. Abdallah, Marwan Sayed, H. Omran
{"title":"Tunable Microwave Single-Bandpass Photonic Filter Based on Amplified Mems-Based Gires–Tournois Interferometer","authors":"H. Kotb, Y. Sabry, M. Abdallah, Marwan Sayed, H. Omran","doi":"10.1109/NRSC49500.2020.9235092","DOIUrl":"https://doi.org/10.1109/NRSC49500.2020.9235092","url":null,"abstract":"We demonstrate a compact microelectromechanical systems based tunable single bandpass microwave photonic filter (MPF). A MEMS gold-platted micro-mirror facing cleaved optical fiber forms a tunable miniature Gires–Tournois interferometer (GTI). The micro-mirror was fabricated by Deep Reactive Ion Etching (DRIE) on silicon on insulator (SOI) wafer. A semiconductor optical amplifier (SOA) is employed simultaneously as a source of a broad optical spectrum and as an optical amplifier. A chirped-fiber Bragg grating is used as a dispersive delay line to provide a time delay to each wavelength slice. The simulation and experimental results are in good agreement showing a linear variation of the MPF center frequency with the separation between the micro-mirror and the fiber facet. The measured tuning range and tuning resolution are 1.3 to 2.5 GHz and 5.85 MHz/µm, respectively. The measured value of the stopband attenuation is more than 20 dB. The maximum value of the 3-dB bandwidth is 258 MHz.","PeriodicalId":6778,"journal":{"name":"2020 37th National Radio Science Conference (NRSC)","volume":"449 1","pages":"216-221"},"PeriodicalIF":0.0,"publicationDate":"2020-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82959132","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
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