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2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)最新文献

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Numerical analysis of time-varied radio frequency induced heating on and near an implant during magnetic resonance imaging 磁共振成像过程中植入物及其附近时变射频感应加热的数值分析
2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS) Pub Date : 2015-12-21 DOI: 10.1109/COMCAS.2015.7360373
M. Kozlov, G. Schaefers
{"title":"Numerical analysis of time-varied radio frequency induced heating on and near an implant during magnetic resonance imaging","authors":"M. Kozlov, G. Schaefers","doi":"10.1109/COMCAS.2015.7360373","DOIUrl":"https://doi.org/10.1109/COMCAS.2015.7360373","url":null,"abstract":"We numerically investigated volume loss density and temperature rise generated due to presence of a titanium rod placed in an ASTM F2182-11a high permittivity medium which was excited by radio frequency (RF) 64 MHz plane waves. 3-D electromagnetic and thermal co-simulations were performed for continuous wave and time-varied excitations. If time variable RF excitation that reaches the limit set by the short duration specific absorption rate limit and the implant thermal time constant is comparable to or less than 10s, RF induced heating on and near an implant during magnetic resonance imaging can be up to factor of 2 higher than RF induced heating caused by continuous RF excitation reaches the limit set by whole body specific absorption rate limit defined by IEC 60601-2-33. If the thermal time constant is significantly longer than 10 s, continuous wave excitation results in a reliable assessment of the maximum temperature rise.","PeriodicalId":431569,"journal":{"name":"2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)","volume":"573 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132420566","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
Microwave imaging and microwave induced thermoacoustic tomography 微波成像和微波热声成像
2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS) Pub Date : 2015-12-21 DOI: 10.1109/COMCAS.2015.7360431
Q. Liu
{"title":"Microwave imaging and microwave induced thermoacoustic tomography","authors":"Q. Liu","doi":"10.1109/COMCAS.2015.7360431","DOIUrl":"https://doi.org/10.1109/COMCAS.2015.7360431","url":null,"abstract":"Breast cancer imaging by microwaves has been investigated intensively over the past two decades due to the potentially high electrical contrasts between malignant tumors and normal breast tissue, but so far clinically successful systems have been rare. We will describe challenges in achieving such a system, and ways to improve the resolution of microwave imaging. We will also report on our recent progress in microwave induced thermoacoustic tomography (MITAT) for breast imaging.","PeriodicalId":431569,"journal":{"name":"2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114319575","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
Increased ambiguity resolution in digital radio frequency receivers 增加了数字射频接收机的歧义分辨率
2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS) Pub Date : 2015-12-21 DOI: 10.1109/COMCAS.2015.7360408
J. Rice, R. Mills, M. Temple, Jesse Peterson
{"title":"Increased ambiguity resolution in digital radio frequency receivers","authors":"J. Rice, R. Mills, M. Temple, Jesse Peterson","doi":"10.1109/COMCAS.2015.7360408","DOIUrl":"https://doi.org/10.1109/COMCAS.2015.7360408","url":null,"abstract":"Resolving radar signal ambiguities in digital radio frequency receivers using traditional identification (ID) techniques remains challenging. Parametric comparison of common received signal features such as radio frequency, pulse width, pulse repetition interval and angle-of-arrival can lead to either (1) multiple emitters producing a single ID, or (2) a single emitter producing multiple IDs. This work considers the use of radio frequency-distinct native attribute (RF-DNA) features to augment traditional parametric comparison approaches to augment emitter ID and reduce ambiguity. Applying RF-DNA techniques to emitter identification provides a new way of reducing or removing this ambiguity. Previously only used for communications signals, we demonstrate the concept of using RF-DNA on simulated radar signals. Initial results indicate up to 85% accuracy in determining an ambiguous pulse descriptor word was transmitted from a digitally reproduced source.","PeriodicalId":431569,"journal":{"name":"2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130746823","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
Scanner based drive test LTE capacity measurements with MIMO antennas placed inside the vehicle 基于扫描仪的驾驶测试LTE容量测量，并在车内放置MIMO天线
2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS) Pub Date : 2015-12-21 DOI: 10.1109/COMCAS.2015.7360365
J. Schaffner, Hyok J. Song, A. Bekaryan, T. Talty, Duane S. Carper, E. Yasan
{"title":"Scanner based drive test LTE capacity measurements with MIMO antennas placed inside the vehicle","authors":"J. Schaffner, Hyok J. Song, A. Bekaryan, T. Talty, Duane S. Carper, E. Yasan","doi":"10.1109/COMCAS.2015.7360365","DOIUrl":"https://doi.org/10.1109/COMCAS.2015.7360365","url":null,"abstract":"LTE drive tests were conducted in urban and suburban environments with 2×2 MIMO antennas located on the roof and also inside the vehicle. Measurements were conducted at bands 4, 13, and 17. The measured average channel capacities (bits/second) for the antennas placed inside the vehicle were found to be comparable to the measured capacities when the antennas were placed on the roof.","PeriodicalId":431569,"journal":{"name":"2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128111035","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
SOI technology for front end applications 前端应用的SOI技术
2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS) Pub Date : 2015-12-21 DOI: 10.1109/COMCAS.2015.7360403
Z. Shaked, P. Hurwitz, A. Heiman, K. Moen, R. Kanawati, S. Chaudhry, M. Racanelli
{"title":"SOI technology for front end applications","authors":"Z. Shaked, P. Hurwitz, A. Heiman, K. Moen, R. Kanawati, S. Chaudhry, M. Racanelli","doi":"10.1109/COMCAS.2015.7360403","DOIUrl":"https://doi.org/10.1109/COMCAS.2015.7360403","url":null,"abstract":"SOI processes have become the mainstream technology for wireless front end manufacturing following recent optimization of starting materials and fabrication processes. In this paper, we will describe such RFSOI platform for RF switches, the process optimizations and the devices offering required for efficient FEM design.","PeriodicalId":431569,"journal":{"name":"2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116377489","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
Multicast MIMO enhancement for V2X over LTE 基于LTE的V2X多播MIMO增强
2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS) Pub Date : 2015-12-21 DOI: 10.1109/COMCAS.2015.7360413
A. Khina, T. Philosof, M. Laifenfeld
{"title":"Multicast MIMO enhancement for V2X over LTE","authors":"A. Khina, T. Philosof, M. Laifenfeld","doi":"10.1109/COMCAS.2015.7360413","DOIUrl":"https://doi.org/10.1109/COMCAS.2015.7360413","url":null,"abstract":"Motivated by recent interest in vehicle-to-vehicle/ infrastructure/pedestrian (V2X) communication over the fourth generation of the Long-Term Evolution (LTE) cellular standard, we study the efficiency of the Multimedia Broadcast Multicast Services (MBMS), a key enabler for V2X communication, which currently employs only single antenna transmission. We show that by utilizing more transmit antennas at the base station - which are already used for point-to-point communications - and simple space-time coding (STC) techniques, a significant boost in performance can be achieved. To this end, we evaluate the performance of different transmission strategies along with the information theoretic optimal performance. For a fast Rayleigh fading channel, we show that a gain of 1 bit/sec/Hz is achieved for a signal-to-noise ratio of 10dB, and higher gains for higher signalto- noise-ratios for for an outage probability of 0.01. Moreover, we demonstrate that Alamouti STC is near optimum for typical signal-to-noise ratios. However, for more antennas, due to the inherent loss of multiplexing of orthogonal STC schemes, non-orthogonal STC schemes with higher multiplexing need to be considered.","PeriodicalId":431569,"journal":{"name":"2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130170379","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
Material induced changes of antenna performance in vehicular applications 车辆应用中材料引起的天线性能变化
2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS) Pub Date : 2015-12-21 DOI: 10.1109/COMCAS.2015.7360442
Gerald Artner, R. Langwieser, C. Mecklenbrauker
{"title":"Material induced changes of antenna performance in vehicular applications","authors":"Gerald Artner, R. Langwieser, C. Mecklenbrauker","doi":"10.1109/COMCAS.2015.7360442","DOIUrl":"https://doi.org/10.1109/COMCAS.2015.7360442","url":null,"abstract":"Recent advancements in production materials for cars replace well-known ground plane materials for vehicular antennas. Carbon-fiber composites (CFC's) replace steel as chassis material, which leads to reduced radiation efficiency. As the production processes of shark-fin antenna modules shift towards laser direct structuring (LDS), it is investigated, if antenna efficiency can be increased by the introduction of a LDS ground plane. Differences in antenna performance are presented on the example of simple LDS and wire monopole-antennas for 5:9GHz (IEEE 801.11p, ITS G5). Gain, efficiency, return loss and the radiation patterns of an LDS design, a CFC and an aluminum ground plane are compared.","PeriodicalId":431569,"journal":{"name":"2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122051229","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
RF variable gain amplifier with linear control and automatic matching in 28 nm CMOS 线性控制和自动匹配的28纳米CMOS射频可变增益放大器
2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS) Pub Date : 2015-12-21 DOI: 10.1109/COMCAS.2015.7360480
E. Sobotta, R. Wolf, N. Joram, F. Ellinger
{"title":"RF variable gain amplifier with linear control and automatic matching in 28 nm CMOS","authors":"E. Sobotta, R. Wolf, N. Joram, F. Ellinger","doi":"10.1109/COMCAS.2015.7360480","DOIUrl":"https://doi.org/10.1109/COMCAS.2015.7360480","url":null,"abstract":"A broadband radio frequency (RF) variable gain amplifier (VGA) enhanced with a gain control and automatic input impedance matching is presented in this work. Due to the control loop, the gain is linear-in-magnitude versus the control input. Additionally, the control loop makes the circuit robust towards process and temperature variations of the transistors. The measured low phase variation versus control range of less than 3.5° and the high gain control range of 33 dB make this VGA a suitable building block for multi-antenna front-ends. Furthermore, the circuit shows a large 3 dB bandwidth of 15 GHz and therewith covers multiple ISM frequency bands. The chip is implemented using a Global Foundries (GF) 28nm bulk CMOS process and the active area amounts to 130μm×200 μm. It consumes maximum 4.75mA from a supply of 2.0 V.","PeriodicalId":431569,"journal":{"name":"2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134190354","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
Microwave electronic CAD modeling of microwave-band optoelectronic oscillator based on long wavelength VCSEL 基于长波长VCSEL的微波波段光电振荡器的微波电子CAD建模
2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS) Pub Date : 2015-12-21 DOI: 10.1109/COMCAS.2015.7360467
M. Belkin, V. Golovin
{"title":"Microwave electronic CAD modeling of microwave-band optoelectronic oscillator based on long wavelength VCSEL","authors":"M. Belkin, V. Golovin","doi":"10.1109/COMCAS.2015.7360467","DOIUrl":"https://doi.org/10.1109/COMCAS.2015.7360467","url":null,"abstract":"Computer-aided design principles of nonlinear equivalent-circuit model for a microwave-band optoelectronic oscillator are proposed. Simulations of the key characteristics of the device based on a long-wavelength vertical-cavity surface emitting laser using the off-the-shelf electronic CAD tool are exemplified. A comparison with previously presented modeling results for the same laser-based 6-9 GHz-band optoelectronic oscillator using a special optoelectronic CAD tool is highlighted.","PeriodicalId":431569,"journal":{"name":"2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)","volume":"7 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132694302","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
Magnetic controlled navigating system for a micro-robot through the blood vessels 微型机器人通过血管的磁控导航系统
2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS) Pub Date : 2015-12-21 DOI: 10.1109/COMCAS.2015.7360371
Ron Misgav, R. Shavit
{"title":"Magnetic controlled navigating system for a micro-robot through the blood vessels","authors":"Ron Misgav, R. Shavit","doi":"10.1109/COMCAS.2015.7360371","DOIUrl":"https://doi.org/10.1109/COMCAS.2015.7360371","url":null,"abstract":"In this paper, a magnetic navigation system for a micro-robot flowing in the circulatory system is considered. The suggested system consist of three orthogonal pairs of coils surrounding the region of interest. The current injected in each coil applies force and torque on a magnetic dipole in a capsule to track a predefined path in the circulatory system. The coil system utilizes a combined Helmholtz and Maxwell coil pairs to produce a magnetic field with uniform amplitude and gradient. The navigation system is designed as an open loop system using SIMULINK. The system results are demonstrated considering a steady and uniform blood velocity.","PeriodicalId":431569,"journal":{"name":"2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134422276","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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