发布求助
文献互助 智能选刊 最新文献

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

筛选
英文 中文
Superdirective dielectric spherical multilayer antennae 超定向介质球形多层天线
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958207
Igor Sushencev, A. Shcherbakov, K. Ladutenko, P. Belov
{"title":"Superdirective dielectric spherical multilayer antennae","authors":"Igor Sushencev, A. Shcherbakov, K. Ladutenko, P. Belov","doi":"10.1109/COMCAS44984.2019.8958207","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958207","url":null,"abstract":"Dielectric electrically small antennae are attracting high interest due to their promising applications both in optical and microwave bands. Efficiency of such antennas is usually bounded by low directivity. The stochastic optimization procedure is used to demonstrate superdirective designs of small all-dielectric antennas being spherical multilayer structure. The procedure is based on an efficient and accurate rigorous electromagnetic model which allows for performing large scale optimization on personal computers with limited resources. For optimization we compared different stochastic algorithms, and the JADE demonstrated the best performance. The found designs possess the directivity that go beyond the conventional theoretical bounds for antennas smaller than the wavelength and outperform previously attained results.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"15 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":"122211754","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
An RF Voltage Detector with Low Harmonic Feedback for Antenna Tuning Switches 天线调谐开关用低谐波反馈射频电压检测器
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958276
Oguzhan Oezdamar, A. Hagelauer, R. Weigel, V. Solomko
{"title":"An RF Voltage Detector with Low Harmonic Feedback for Antenna Tuning Switches","authors":"Oguzhan Oezdamar, A. Hagelauer, R. Weigel, V. Solomko","doi":"10.1109/COMCAS44984.2019.8958276","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958276","url":null,"abstract":"A voltage detector with reduced harmonic feedback into the sensed RF path for the use in highly-linear, high-voltage antenna tuning switches is demonstrated. The reduction of harmonic content is achieved by adding linearization elements to the charge-pump-based rectifier, which are activated at large input RF voltage amplitudes. The detector has been implemented and tested in hardware with two high-voltage switches. The ICs were manufactured in Infineon 130nm RF switch process. The measured voltage detector exhibits a linear transfer characteristic and generates feedback harmonics level, which is below the nonlinearities of the intrinsic RF switch. The proposed detector targets voltage monitoring function, particularly in the RF switches for antenna tuning applications.","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":"122918502","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
An Analysis of the Power Balance in Systems Described by S Parameters S参数描述系统的功率平衡分析
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958243
V. Vulfin, Nastya Verhovsky, S. Sayfan-Altman, R. Ianconescu
{"title":"An Analysis of the Power Balance in Systems Described by S Parameters","authors":"V. Vulfin, Nastya Verhovsky, S. Sayfan-Altman, R. Ianconescu","doi":"10.1109/COMCAS44984.2019.8958243","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958243","url":null,"abstract":"The interpretation of the S parameters concerning power balance is often misunderstood. This work analyzes the power balance in systems described by S parameters and defines more accurate criteria for examining this property.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"73 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":"124168930","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
Computational Analysis of Nanoantenna Arrays for Nanoparticle Detection 用于纳米颗粒检测的纳米天线阵列的计算分析
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958178
G. Işıklar, Ö. Ergül
{"title":"Computational Analysis of Nanoantenna Arrays for Nanoparticle Detection","authors":"G. Işıklar, Ö. Ergül","doi":"10.1109/COMCAS44984.2019.8958178","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958178","url":null,"abstract":"We present computational analysis of nanoantenna arrays when they are used to detect and identify nearby nanoparticles. Solutions of frequency-domain scattering problems are performed by using a surface-integral-equation formulation that is suitable for composite structures involving metallic, dielectric, magnetic, and/or plasmonic objects. Acceleration is further achieved via the multilevel fast multipole algorithm that is developed for composite structures. Numerical results demonstrate the feasibility of particle detection and identification, even with sparse arrays with relatively large periodicities.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"18 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":"127958677","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
Efficient Probes for Ultra-high-field Magnetic Resonance Microscopy Based on Coupled Ceramic Resonators 基于耦合陶瓷谐振器的超高场磁共振显微镜高效探头
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958418
S. Kurdjumov, L. Ciobanu, B. Djemai, P. Belov, S. Glybovski, E. Nenasheva, A. Webb, M. Moussu, M. Dubois, S. Enoch, R. Abdeddaim
{"title":"Efficient Probes for Ultra-high-field Magnetic Resonance Microscopy Based on Coupled Ceramic Resonators","authors":"S. Kurdjumov, L. Ciobanu, B. Djemai, P. Belov, S. Glybovski, E. Nenasheva, A. Webb, M. Moussu, M. Dubois, S. Enoch, R. Abdeddaim","doi":"10.1109/COMCAS44984.2019.8958418","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958418","url":null,"abstract":"In this contribution, we present a new radiofrequency probe, a dual dielectric resonator used for transmission and reception of RF signals in Magnetic Resonance Microscopy. The probe is designed as a pair of magnetically coupled ceramic rings with the permittivity of 530 resonating at the Larmor frequency of protons at the magnetic field 17 T (730 MHz). The resonators are made of a unique low-loss ferroelectric composite ceramics, which allows doubling the scanned volume with increased signal-to-noise ratio in comparison to a metal solenoid probe. By adjusting the distance between the resonators and the position of the loop feed placed between them, the probe can be tuned and impedance-matched and does not require capacitors.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"573 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":"116114526","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 18-24 GHz Compact Single Stage Amplifier with 13 ± 0.5 dB gain, OP3dB of +19 dBm and 19% PAE for Radar Applications in Tower 180 nm CMOS 18-24 GHz紧凑型单级放大器，增益为13±0.5 dB, OP3dB为+19 dBm, PAE为19%，适用于雷达在180nm CMOS上的应用
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958241
S. Jameson, N. Buadana, E. Sźulc, A. Sayag, Isaac Sarusi, A. Wolfman, O. Shaham
{"title":"A 18-24 GHz Compact Single Stage Amplifier with 13 ± 0.5 dB gain, OP3dB of +19 dBm and 19% PAE for Radar Applications in Tower 180 nm CMOS","authors":"S. Jameson, N. Buadana, E. Sźulc, A. Sayag, Isaac Sarusi, A. Wolfman, O. Shaham","doi":"10.1109/COMCAS44984.2019.8958241","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958241","url":null,"abstract":"This paper proposes a modified differential cascode amplifier topology for mm-wave applications requiring wideband amplification, flatness and compact integration area. The proposed topology was used to create a single stage power amplifier with +13 dB small-signal gain ±0.5 dB flatness over 18 - 24 GHz. The power amplifier load-pull and biasing were optimized to reach a maximum PAE around 3 dB compression to minimize AM-PM variation and maximize performance-to-reliability ratio in large phased array transmitters. At 3 dB compression, an output power of +19 dBm with a peak PAE of 19% was measured around 18 GHz. Respectively, at 8 dB compression a peak power of +20 dBm is achieved and is over +19 dBm up to 24 GHz. The circuit demonstrates one of the smallest core area (0.16 mm2) and excellent power density. The proposed topology presents currently a record small signal gain per stage at this technology node ($f_{T}/f_{max}$ of 59/65 GHz). The presented amplifier topology can be used repetitively and reliably to create wide-band amplifiers with state-of-the-art gain, flatness and return loss over small area. The circuit was realized using Tower’s 180 nm CMOS.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"19 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":"116658673","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
Study of a Method for Effective Noise Suppression in Passive Personnel Screening Systems 被动人员筛选系统中有效噪声抑制方法的研究
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958181
A. Zhuravlev
{"title":"Study of a Method for Effective Noise Suppression in Passive Personnel Screening Systems","authors":"A. Zhuravlev","doi":"10.1109/COMCAS44984.2019.8958181","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958181","url":null,"abstract":"The paper discusses approaches to increase the sensitivity of passive personnel screening systems by integrating sequential frames with a moving subject. Several state-of-the-art methods of computer vision are considered for this purpose, which can be used to track moving subjects even on very different frames. The results of experiments using the computer vision method DensePose, based on the use of artificial neural networks, are presented. Using DensePose, the segmentation of a moving subject and textural UV-coordinates for the surface model of the human body are found on frames, which are used in the described frame-by-frame integration method. Considering obtained results, the shortcomings of the proposed frame integration method are identified and listed. The directions of further research are suggested.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"45 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":"124122008","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
Machine Learning for Detecting Anomalies in SAR Data 基于机器学习的SAR数据异常检测
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958073
Yuval Haitman, Itay Berkovich, Shiran Havivi, S. Maman, D. Blumberg, S. Rotman
{"title":"Machine Learning for Detecting Anomalies in SAR Data","authors":"Yuval Haitman, Itay Berkovich, Shiran Havivi, S. Maman, D. Blumberg, S. Rotman","doi":"10.1109/COMCAS44984.2019.8958073","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958073","url":null,"abstract":"One of most common algorithms for anomaly detection in multi-dimensional imagery is the Reed - Xiaoli (RX) algorithm; it gives each pixel a score that defines its likelihood to be an anomaly. We have implemented a new algorithm which uses both RX and the Non-Negative Matrix Factorization (NNMF) learning algorithm in order to pick an adaptive threshold for detection; we have applied it to Synthetic Aperture Radar (SAR) data. The NNMF approach is defined as a minimization problem which approximates the given data by extracting its main trends. By comparing the original data to the reduced data, we can divide the image anomalies into two different groups, where one group contains the anomalies which are part of the image main trends and the second group contains the anomalies of the sub trends. With this division, we can pick an adaptive threshold for each of the groups according to its unique characteristics.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"10 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":"123065080","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
[Copyright notice] (版权)
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/comcas44984.2019.8958386
{"title":"[Copyright notice]","authors":"","doi":"10.1109/comcas44984.2019.8958386","DOIUrl":"https://doi.org/10.1109/comcas44984.2019.8958386","url":null,"abstract":"","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":"126510008","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
UAV-assited Wireless Powered Sensor Network over Rician Shadowed Fading Channels 雷达阴影衰落信道下的无人机辅助无线传感网络
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958112
S. Panic, T. D. P. Perera, D. Jayakody, C. Stefanovic, B. Prlincevic
{"title":"UAV-assited Wireless Powered Sensor Network over Rician Shadowed Fading Channels","authors":"S. Panic, T. D. P. Perera, D. Jayakody, C. Stefanovic, B. Prlincevic","doi":"10.1109/COMCAS44984.2019.8958112","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958112","url":null,"abstract":"In this paper, we are observing scenario of unmanned aerial vehicle (UAV) data collection from sensor network, where each sensor harvests energy from the data-collecting UAV for its own information transmission. In first time instant, the wireless energy transfer (WET) to sensor nodes is performed, while in second time instant UAV collects data from sensor nodes. In order to take into account the possibility of occurrence of obstacles, that could block the line-of-sight (LOS) link in-between sensor nodes and UAV, and to in order to observe fluctuations of the LOS signal that are brought by shadowing effect, we have used the assumption of Rician Shadowed fading channels and analyzed the outage probability (OP) properties of such network. Closed form expression are derived for OP, and OP features are observed and discussed in the function of system parameters such are shadowing severity, targeted information rate, UAV location, and the time ratio of WET.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"32 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":"128381132","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: 7
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信