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

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Advanced Microwave Imaging with Compressive Processing - Concepts, Methods, and Applications 压缩处理的先进微波成像-概念，方法和应用
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958087
A. Massa, N. Anselmi, G. Oliveri, M. Salucci
{"title":"Advanced Microwave Imaging with Compressive Processing - Concepts, Methods, and Applications","authors":"A. Massa, N. Anselmi, G. Oliveri, M. Salucci","doi":"10.1109/COMCAS44984.2019.8958087","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958087","url":null,"abstract":"In this work, an overview of the main concepts when using Compressive Processing (CP)-based methods for microwave imaging is reported. The main theoretical aspects and conditions, namely the sparseness of the unknowns with respect to the representative basis and the incoherence of the measured data encoded within the Restrict Isometry Property (RIP) of the problem matrix linking the data to the unknowns, are provided, enabling the use of efficient CP inversion tools. Simple examples are reported, aimed at illustrating the effectiveness of the presented theory.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"22 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":"127057089","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
Terahertz Range Elementary Dipole Excitation of a Thin Dielectric Disk Sandwiched between Two Graphene Covers: Integral Equation Analysis 夹在两个石墨烯覆盖层之间的薄介电盘的太赫兹范围基本偶极激发:积分方程分析
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958411
M. Balaban, R. Sauleau, M. García-Vigueras, A. Nosich
{"title":"Terahertz Range Elementary Dipole Excitation of a Thin Dielectric Disk Sandwiched between Two Graphene Covers: Integral Equation Analysis","authors":"M. Balaban, R. Sauleau, M. García-Vigueras, A. Nosich","doi":"10.1109/COMCAS44984.2019.8958411","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958411","url":null,"abstract":"We study, using the integral equation technique, the scattering of the field radiated by an elementary dipole, by a thin dielectric disk sandwiched between two conformal graphene covers, on the top and bottom faces. To build a mathematical model of such scatterer, we use the generalized boundary condition in the form first obtained by Mitzner and Bleszynski et al. and generalized by Karlsson. This enables us to derive dual integral equations in the disk plane for the Hankel transforms of the tangential electric and magnetic field components, and cast it to a set of two coupled Fredholm second-kind integral equations. The latter equations are discretized and solved numerically with the guaranteed convergence. We compute and plot the power radiated by an elementary magnetic dipole placed above such a composite disk, in the THz range. This reveals that the studied scatterer is a complicated open resonator supporting the low-frequency plasmon modes and the high-frequency dielectric-disk modes.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"55 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":"114687675","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
Broadcast Approach for the Information Bottleneck Channel 信息瓶颈信道的广播方法
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958109
A. Steiner, S. Shamai
{"title":"Broadcast Approach for the Information Bottleneck Channel","authors":"A. Steiner, S. Shamai","doi":"10.1109/COMCAS44984.2019.8958109","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958109","url":null,"abstract":"This work considers a layered coding approach for efficient transmission of data over a wireless block fading channel, connected to a limited capacity reliable link, known as the bottleneck channel. Two main approaches are considered, the first is an oblivious approach, where the sampled noisy observations are compressed and transmitted over the bottleneck channel without having any knowledge of the original information codebook. This is compared to a decode-forward (non-oblivious) approach where the sampled noisy data is decoded, and whatever is successfully decoded is reliably transmitted over the bottleneck channel. In both settings it is possible to analytically describe in closed form expressions, the optimal continuous layering power distribution which maximizes the average achievable rate. Numerical results demonstrate the achievable broadcasting rate in the limit of continuous layering.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"80 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":"114571106","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: 6
MFIE-Based Formulation Using Double-Layer Modeling for Perfectly Conducting Objects 基于mfie的完美导电物体双层建模方法
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958357
S. Güler, H. Ibili, Ö. Ergül
{"title":"MFIE-Based Formulation Using Double-Layer Modeling for Perfectly Conducting Objects","authors":"S. Güler, H. Ibili, Ö. Ergül","doi":"10.1109/COMCAS44984.2019.8958357","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958357","url":null,"abstract":"We present resonance-free solutions of scattering problems involving closed conductors using the magnetic field integral equation (MFIE). In the literature, MFIE is often combined with the electric-field integral equation (EFIE) to avoid internal resonances that can significantly contaminate solutions especially when scatterers become electrically large. The resulting combined-field integral equation (CFIE), however, possesses the disadvantages of EFIE, e.g., ill-conditioning for dense discretizations. We show that placing an interacting inner surface inside the given object and enforcing internal fields to be zero can mitigate internal resonances, making MFIE resonance-free without employing EFIE. Using an arbitrary inner surface can significantly suppress internal fields; but, as also shown in this contribution, the size of the inner surface, i.e., the distance between inner and outer surfaces, can be critical to obtain accurate results that are comparable to those obtained with the conventional CFIE.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"35 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":"115847883","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
Highly-directive systems inspired by physical bounds on scattering processes 受散射过程的物理边界启发的高度指导性系统
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8957857
Iñigo Libera
{"title":"Highly-directive systems inspired by physical bounds on scattering processes","authors":"Iñigo Libera","doi":"10.1109/COMCAS44984.2019.8957857","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8957857","url":null,"abstract":"The identification of physical bounds of performance is central to the understanding of light-matter interactions and the design of optimal devices that reach those theoretical limits. Here, we extend our previous work to derive physical bounds of performance for time-harmonic scattering processes, including total scattering, total absorption, bistatic scattering and minimal scattering sensors, for arbitrary far-field illumination of a system in the presence of a material interface. The derived upper bounds emphasize a weighted function of the scattering directivity as the main limiting factor in the theoretically achievable performance for all aforementioned scattering processes. Therefore, our analysis remarks the potential benefits of using highly-directive systems in multiple configurations.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"14 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":"116810825","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
Studying an Optimal Approach to Distribute Signals through Fiber-Wireless Fronthaul Network 光纤-无线前传网络信号分配的最优方法研究
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958365
M. Belkin, T. Bakhvalova, A. Sigov
{"title":"Studying an Optimal Approach to Distribute Signals through Fiber-Wireless Fronthaul Network","authors":"M. Belkin, T. Bakhvalova, A. Sigov","doi":"10.1109/COMCAS44984.2019.8958365","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958365","url":null,"abstract":"We compare the three options of distributing signals through fifth-generation fronthaul communication network of fiber-wireless architecture with a wireless section operating in MMW-band: in baseband, in intermediatefrequency band, and in radio-frequency band. In the result, the advantage of effective application for intermediatefrequency band transmission are defined and confirmed by a simulation. The study showed that even in the lower part of the MMW-band, the standard for 64-QAM EVM limit was achieved when the maximum length of the fiber-optics link was 3 times shorter compared to transmission at IF-band even when using the most promising type of optical modulator.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"3 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":"115631935","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: 4
Observation of photonic Jackiw-Rebbi states in chains of all-dielectric bianisotropic particles 全介电双各向异性粒子链中光子jacki - rebbi态的观察
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958327
D. Zhirihin, A. Gorlach, A. Slobozhanyuk, A. Khanikaev, M. Gorlach
{"title":"Observation of photonic Jackiw-Rebbi states in chains of all-dielectric bianisotropic particles","authors":"D. Zhirihin, A. Gorlach, A. Slobozhanyuk, A. Khanikaev, M. Gorlach","doi":"10.1109/COMCAS44984.2019.8958327","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958327","url":null,"abstract":"In this paper we study theoretically and experimentally chains of all-dielectric bianisotropic particles. We show that photonic analogues of Jackiw-Rebbi states emerge at the interface between the domains with the opposite sign of bianisotropy parameter. Using near-field measurements, we perform proof-of-principle experimental demonstration of the interface states and reveal field localization at the domain wall in microwave frequency range.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"464 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":"123052636","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
An X-Band Quasi-Circulator GaAs MMIC 一种x波段准环行GaAs MMIC
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958125
L. Marzall, Z. Popovic
{"title":"An X-Band Quasi-Circulator GaAs MMIC","authors":"L. Marzall, Z. Popovic","doi":"10.1109/COMCAS44984.2019.8958125","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958125","url":null,"abstract":"This paper presents the design of a 8-12GHz quasi-circulator fabricated in a $0.25 mu mathrm{m}$ GaAs pHEMT monolithic microwave integrated circuit (MMIC) process. The circuit consists of three Lange couplers which connect gates and drains of three equal gain-matched amplifiers. The coupling factor of the unequal-split Lange coupler is designed to achieve an isolation higher than 20dB over a 40% bandwidth, with a return loss of better than 10dB and an insertion gain of 2.4dB across the band. The layout includes bias networks for the three amplifiers and occupies a 2.5mm $times 2.5$ mm die. The compact quasi-circulator is intended for use in full-duplex front ends.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"102 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":"115734799","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
Astronomical Technologies and Satellite Communications 天文技术与卫星通信
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958031
M. Tordi, G. Marchiori, S. Lorenzi, F. Rampini, R. Cimmino, M. Spinola
{"title":"Astronomical Technologies and Satellite Communications","authors":"M. Tordi, G. Marchiori, S. Lorenzi, F. Rampini, R. Cimmino, M. Spinola","doi":"10.1109/COMCAS44984.2019.8958031","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958031","url":null,"abstract":"Satellite communication infrastructures and radio-telescopes have always shared several technological elements. There are several examples in the history of radio-astronomy where dismissed Earth Stations have been converted into radio-telescopes. Dual use stations are also an example, while on some cases satellite communications took advantage of technologies developed for radio-astronomy to improve their capabilities. Future scenarios may see a deeper integration between the two infrastructures: a specific example is discussed with reference to the Square Kilometer Array. A short overview referring to optical communication is also provided.","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"467 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":"128708062","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
Location-Domain Channel Representation for Estimating Distributed MIMO Channels 估计分布式MIMO信道的位置域信道表示
2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) Pub Date : 2019-11-01 DOI: 10.1109/COMCAS44984.2019.8958224
Arkady Molev-Shteiman, Xiao-Feng Qi, L. Mailaender
{"title":"Location-Domain Channel Representation for Estimating Distributed MIMO Channels","authors":"Arkady Molev-Shteiman, Xiao-Feng Qi, L. Mailaender","doi":"10.1109/COMCAS44984.2019.8958224","DOIUrl":"https://doi.org/10.1109/COMCAS44984.2019.8958224","url":null,"abstract":"We propose a location-domain channel representation and apply it to channel estimation for distributed MIMO (D-MIMO) networks. The approach contrasts with various angle-domain formulations that appear well suited for a collocated large array where the far-field assumption allows an angle-domain channel representation but are ill-suited to geographically distributed arrays (large and small), as in densely deployed 5G cellular networks. Our alternative location-domain representation avoids such difficulties by indexing the multipath channel by the locations, instead of angles, of user terminals or access points. Furthermore, it naturally incorporates 3D surrounding information in the form of a ‘channel database,’ achieving scene-specific SNR gain and ease of machine learning. We demonstrate the efficacy of our proposal through simulation of simple channel estimation algorithms over a narrowband channel. The new channel representation is applied to direct positioning in a companion publication [15].","PeriodicalId":276613,"journal":{"name":"2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"99 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":"121020674","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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