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2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)最新文献

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Directivity Enhancement of Tight Couplers 紧密耦合器的指向性增强
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958089
Oz Sorkin, E. Holdengreber, M. Averbukh, S. Schacham, E. Farber
{"title":"Directivity Enhancement of Tight Couplers","authors":"Oz Sorkin, E. Holdengreber, M. Averbukh, S. Schacham, E. Farber","doi":"10.1109/COMCAS44984.2019.8958089","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958089","url":null,"abstract":"An enhancement of 22 dB in directivity, and 15 dB in return loss was achieved in an improved wiggly-line coupler. The improvement was obtained by introducing two new degrees of freedom to the wiggly-line. Heat maps of coupling, directivity and return loss, as a function of the new degrees of freedom, show previously unavailable fine-tuning capabilities, from which optimal parameters were derived. The use of the improved wiggly-line allows a better even- and odd-mode phase velocity compensation, and an improvement of 42% of even- and odd-mode velocity difference is shown. The improved wiggly-line concept is used to design a tight, tandem, 1.6dB coupler as a center stage of 3-stage symmetrical wideband, 6-18 GHz, 90- degree hybrid coupler implemented in microstrip coupled line topology using bond wires for the tandem section. The loose stage is designed using periodic, quasi-lumped, capacitively-loaded coupled lines. A CST simulation of each design step is shown.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"372 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114787339","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: 3
UWB Radar for High Resolution Breast Cancer Scanning: System, Architectures, and Challenges 用于高分辨率乳腺癌扫描的超宽带雷达:系统、架构和挑战
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8957864
D. Oloumi, A. Bevilacqua, M. Bassi
{"title":"UWB Radar for High Resolution Breast Cancer Scanning: System, Architectures, and Challenges","authors":"D. Oloumi, A. Bevilacqua, M. Bassi","doi":"10.1109/COMCAS44984.2019.8957864","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8957864","url":null,"abstract":"Breast cancer is the most incident tumor among the female population, and early detection is key for long-term survival. X-ray mammography is the general approach for the regular monitoring of the breast, but it is uncomfortable and only provides 2D images. Microwave imaging using ultra-wideband radar techniques is an emerging method to replace X-ray mammography. In this paper, we review three most promising architectures of ultra-wideband radar systems, suitable for breast cancer imaging, to highlight the pros and cons in system design, calibrations as well as data processing for breast cancer imaging application.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114822869","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: 5
Practical Issues with Unloaded Resonant Inductive WPT Link Operating in Load-Independent Regime 无载谐振电感WPT链路在负载无关状态下工作的实际问题
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958269
Yotam B. Frechter, Y. Darhovsky, A. Kuperman
{"title":"Practical Issues with Unloaded Resonant Inductive WPT Link Operating in Load-Independent Regime","authors":"Yotam B. Frechter, Y. Darhovsky, A. Kuperman","doi":"10.1109/COMCAS44984.2019.8958269","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958269","url":null,"abstract":"The paper reveals practical issues present in series-series compensated unloaded inductive wireless power transfer system operating in load-independent regime. It was recently shown, that due to existence of parasitic resistances, corresponding output voltage is not completely load-independent. Based on time-domain analysis, DC voltage gain of an unloaded system was predicted for a wide range of operation frequencies. However, parasitic lumped capacitance of the receiving coil was not taken into account. It is therefore shown that parasitic oscillations appearing in an unloaded secondary impose significant overvoltage at DC output, which may cause safety issues. Two possible solutions are discussed, allowing damping the oscillations thus making the unloaded operation feasible. The presented analysis is well-verified by simulation results and experiments of a 400V, 1kW inductive wireless power transfer link.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121859436","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
Meteorological Phased Array Radar Research at NOAA’s National Severe Storms Laboratory 美国国家海洋和大气管理局国家强风暴实验室气象相控阵雷达研究
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958067
M. Weber
{"title":"Meteorological Phased Array Radar Research at NOAA’s National Severe Storms Laboratory","authors":"M. Weber","doi":"10.1109/COMCAS44984.2019.8958067","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958067","url":null,"abstract":"The U.S. National Oceanic and Atmospheric Administration (NOAA) has begun evaluating strategies for replacement of the current Weather Service Radar 88 Doppler (WSR-88D) by 2040, when this system is projected to reach the end of its operational lifetime. In addition to maintaining the WSR-88D’s capabilities to detect and classify meteorological scatterers with high sensitivity and spatial resolution, NOAA has articulated goals for more rapid temporal scanning and expanded low altitude coverage. Research at NOAA’s National Severe Storms Laboratory over the past 15 years has demonstrated that phased array radar (PAR) could support volume scan rates of up to once per minute, and that this would improve the ability of forecasters to warn of severe weather. The rapid scan data would also enhance the effectiveness of radar data-assimilation into “Warn on Forecast” systems. This paper discusses three key issues for meteorological PAR: (1) a plausible architecture for a phased array system meeting NOAA’s objective requirements; (2) the feasibility of calibrating co- and cross-polar radiated fields with sufficient accuracy to robustly correct polarimetric weather variable estimate biases when the beam is electronically steered off-broadside; and (3) the capability to scan significantly faster than the WSR-88D through use of multiple, simultaneously active receive beams and other adaptive techniques. Our positive outlook in each of these areas indicates that PAR’s operational benefits to NOAA should in the future be achievable.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"203 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121454148","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: 5
Simple way of Frequency Tuning using Pin Diode of Transmission type Digital Metasurface 利用传输型数字超表面引脚二极管进行频率调谐的简单方法
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958455
A. Baghel, S. Kulkarni, S. K. Nayak
{"title":"Simple way of Frequency Tuning using Pin Diode of Transmission type Digital Metasurface","authors":"A. Baghel, S. Kulkarni, S. K. Nayak","doi":"10.1109/COMCAS44984.2019.8958455","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958455","url":null,"abstract":"This article shows the frequency tuning using a PIN diode of transmission type digital metasurface. Here, the S21 amplitude of the unit cell in ON and OFF condition of the PIN diode is given the digital code of “0” when the S21 value is less than - 8 dB, and “1” when the amplitude is 0 dB respectively. It is observed that when the diode is ON, the 10 x 18 array shows the nature of OFF condition at 4 GHz. Similarly, when the diode is OFF, the array shows the ON nature at 4 GHz, thus getting ON or OFF condition at 2.54, 4, 6.84 GHz depending on the condition of the diode. This increases the bandwidth of operation.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133862600","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
Over-the-City UAVs Swarm Communications Channel Model 城市无人机群通信信道模型
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958210
Eran Greenberg, Edmund Klodzh
{"title":"Over-the-City UAVs Swarm Communications Channel Model","authors":"Eran Greenberg, Edmund Klodzh","doi":"10.1109/COMCAS44984.2019.8958210","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958210","url":null,"abstract":"The use of UAVs swarm based on drones for various applications is a rapidly growing research field for the smart city. Knowledge of the wireless propagation channel is crucial for designing an efficient communication system and for evaluating its performance. This contribution is focused on LOS/NLOS links between UAVs in the swarm for flight altitudes close to building rooftops. On the one hand LOS conditions are not always dominant or even present in this scenario, and on the other hand there is no complete building blockage. Hence, it is necessary to consider the presence of multipath phenomena reflection and diffraction from building rooftops. This paper describes ray tracing simulations which were performed in order to estimate the contribution of multipath components and to develop a channel model for UAVs swarm communications links.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"52 7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132959280","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
Overview of RLSA Antenna Design and Optimization Techniques developed at the University of Siena 锡耶纳大学开发的RLSA天线设计和优化技术概述
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958088
S. C. Pavone, M. Albani
{"title":"Overview of RLSA Antenna Design and Optimization Techniques developed at the University of Siena","authors":"S. C. Pavone, M. Albani","doi":"10.1109/COMCAS44984.2019.8958088","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958088","url":null,"abstract":"In this paper, we present an overview of radial line slot array (RLSA) antenna design and optimization techniques developed in the past years at the University of Siena, both for near and far field applications at microwaves/millimeter waves. Moreover, also the possibility of generating localized pulses in time domain by means of RLSA is briefly sketched.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133036285","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 New Analytical and Numerical Method for Describing the Response of a Linear Antenna for Pulse Excitation Submission 描述线性天线脉冲激励响应的一种新的解析和数值方法
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958452
A. Witenberg, M. Walkowiak, J. Małecki
{"title":"A New Analytical and Numerical Method for Describing the Response of a Linear Antenna for Pulse Excitation Submission","authors":"A. Witenberg, M. Walkowiak, J. Małecki","doi":"10.1109/COMCAS44984.2019.8958452","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958452","url":null,"abstract":"The paper proposes a hybrid method based on a combined numerical and analytical description of the linear antenna response to Gaussian pulse excitation. Its advantage is to avoid losing the stability of calculations while solving the electric field integral equation in time domain. In the numerical part of the method, the MOT algorithm was used; in the analytical part discrete mean-square approximation with new modified spherical Bessel functions of the first kind as a base was used. This allowed us to calculate the approximating (and extrapolating) functions of small orders.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"517 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133495782","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
Mm-wave and UWB CMOS 65nm SoC for radar applications 毫米波和超宽带CMOS 65nm SoC雷达应用
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958142
N. Mazor, R. Wizenberg, J. Oredsson, P. Svalange, P. Lundborg, T. Melander, Z. Nadiri, N. Chayat
{"title":"Mm-wave and UWB CMOS 65nm SoC for radar applications","authors":"N. Mazor, R. Wizenberg, J. Oredsson, P. Svalange, P. Lundborg, T. Melander, Z. Nadiri, N. Chayat","doi":"10.1109/COMCAS44984.2019.8958142","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958142","url":null,"abstract":"A System on Chip (SoC) solution for ultra-wideband (UWB) and mm-wave MIMO radar applications is presented. The RFIC is implemented in a standard CMOS 65 nm process, comprising 24 transmit-receive modules for UWB along with 48 transmit-receive modules for mm-wave frequencies. Targeting radar applications, the signal generation architecture supports a variety of waveforms. The receive side includes multichannel digitization, memories and DSP processor for radar signal processing. The SoC family has several variants, supporting the 76-81 GHz band for automotive industry and a 57-71 GHz band for smart home applications. The die area is 83 mm$^{2} and it is packaged in a flip-chip BGA package.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131675324","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
Method-of-Moment Analysis of Slender Elliptic Slots 细长椭圆槽的矩量分析方法
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958409
G. Mazzarella, G. Montisci, A. Fanti
{"title":"Method-of-Moment Analysis of Slender Elliptic Slots","authors":"G. Mazzarella, G. Montisci, A. Fanti","doi":"10.1109/COMCAS44984.2019.8958409","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958409","url":null,"abstract":"Waveguide slot arrays are still one of the most popular solutions for microwave and radar antennas. In addition to standard rectangular shunt slots, there is an increasing interest in non-rectangular slots, which can perform better is some applications. We present here a complete approach to the computation of the self-admittance of a single elliptic slot, which has a better power handling than rectangular slots and, when the eccentricity is close to one, also a low cross-polarization. The analysis is done in the spectral domain using the Method-of-Moments, and a new approach to the computation of the Fourier transform of the slot (equivalent) magnetic current is presented.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"216 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115513375","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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