发布求助
文献互助 智能选刊 最新文献

2013 IEEE MTT-S International Microwave Symposium Digest (MTT)最新文献

筛选
英文 中文
Reconfigurable terahertz frequency selective structures using vanadium dioxide 使用二氧化钒的可重构太赫兹频率选择结构
2013 IEEE MTT-S International Microwave Symposium Digest (MTT) Pub Date : 2013-06-02 DOI: 10.1109/MWSYM.2013.6697598
S. Vegesna, Yanhan Zhu, Yong Zhao, Zhaoyang Fan, A. Bernussi, M. Saed
{"title":"Reconfigurable terahertz frequency selective structures using vanadium dioxide","authors":"S. Vegesna, Yanhan Zhu, Yong Zhao, Zhaoyang Fan, A. Bernussi, M. Saed","doi":"10.1109/MWSYM.2013.6697598","DOIUrl":"https://doi.org/10.1109/MWSYM.2013.6697598","url":null,"abstract":"Terahertz frequency selective surfaces with tunable characteristics are presented. Vanadium dioxide patches and metallic resonators were used. Vanadium dioxide behaves as an insulator at low temperatures and as a metal at high temperatures with transition temperature of ~ 68°C. Single to dual polarized bandpass FSS structure at 0.5 THz and tunable bandpass FSS structure were realized. We measured extinction ratio of 25 dB for the polarizer and 31% shift in the resonance frequency for the FSS.","PeriodicalId":128968,"journal":{"name":"2013 IEEE MTT-S International Microwave Symposium Digest (MTT)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114505189","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
Design of a 180-degree hybrid with Chebyshev filtering response using coupled resonators 利用耦合谐振器设计具有切比雪夫滤波响应的180度混合电路
2013 IEEE MTT-S International Microwave Symposium Digest (MTT) Pub Date : 2013-06-02 DOI: 10.1109/MWSYM.2013.6697512
Wan-Rou Liu, Ting-Yi Huang, Chi‐Feng Chen, Tze-Min Shen, R. Wu
{"title":"Design of a 180-degree hybrid with Chebyshev filtering response using coupled resonators","authors":"Wan-Rou Liu, Ting-Yi Huang, Chi‐Feng Chen, Tze-Min Shen, R. Wu","doi":"10.1109/MWSYM.2013.6697512","DOIUrl":"https://doi.org/10.1109/MWSYM.2013.6697512","url":null,"abstract":"A novel 180 ° hybrid with third-order Chebyshev filtering response is proposed in this paper. The coupling coefficients and the external quality factors can be synthesized from the theory of coupled resonator filter. The proposed idea is verified with experimental results, with good agreement between simulation and measurement. Comparing to the conventional rat-race coupler, 80% size reduction and filtering function with high frequency selectivity has been exhibited in the proposed structure.","PeriodicalId":128968,"journal":{"name":"2013 IEEE MTT-S International Microwave Symposium Digest (MTT)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122250895","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: 16
A novel concept for post-fabrication tuning of microwave filters 微波滤波器加工后调谐的新概念
2013 IEEE MTT-S International Microwave Symposium Digest (MTT) Pub Date : 2013-06-02 DOI: 10.1109/MWSYM.2013.6697748
A. R. Sereshkeh, S. Attar, M. Azizi, R. Mansour
{"title":"A novel concept for post-fabrication tuning of microwave filters","authors":"A. R. Sereshkeh, S. Attar, M. Azizi, R. Mansour","doi":"10.1109/MWSYM.2013.6697748","DOIUrl":"https://doi.org/10.1109/MWSYM.2013.6697748","url":null,"abstract":"A novel method for global post-fabrication tuning of microwave filters is presented. The method is based on designing and adding a compensating passive circuit in parallel with the detuned filter. This concept, which is demonstrated by experimental results, has several advantages over traditional techniques for filter tuning that use screws. It can be employed to filter structures that are not easily amenable to the use of tuning screws such as planar filters. Another important advantage of the proposed concept is that it can be employed without knowing details of the filter configuration. The compensating circuit that is added in parallel to the detuned filter, does not affect the individual elements of the filter. The experimental results obtained demonstrate the validity of this concept.","PeriodicalId":128968,"journal":{"name":"2013 IEEE MTT-S International Microwave Symposium Digest (MTT)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116845288","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
Planar sensors for RFID wireless complex-dielectric-permittivity sensing of liquids 用于RFID无线复合介质-介电介电常数传感的平面传感器
2013 IEEE MTT-S International Microwave Symposium Digest (MTT) Pub Date : 2013-06-02 DOI: 10.1109/MWSYM.2013.6697735
H. Lobato-Morales, A. Corona‐Chavez, J. Olvera-Cervantes
{"title":"Planar sensors for RFID wireless complex-dielectric-permittivity sensing of liquids","authors":"H. Lobato-Morales, A. Corona‐Chavez, J. Olvera-Cervantes","doi":"10.1109/MWSYM.2013.6697735","DOIUrl":"https://doi.org/10.1109/MWSYM.2013.6697735","url":null,"abstract":"Two planar sensors for wireless RFID dielectric permittivity sensing of liquids are presented. The first sensor consists of a Substrate-Integrated-Waveguide (SIW) resonant cavity while the second one is composed by an SIW Epsilon-Near-Zero (ENZ) tunnel sensor. Both structures produce a notch resonance response at 4 GHz which is used for the characterization of the liquids using the Cavity-Perturbation-Technique. The proposed sensors present good sensitivity using a small amount of sample volume.","PeriodicalId":128968,"journal":{"name":"2013 IEEE MTT-S International Microwave Symposium Digest (MTT)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129728291","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
UWB MicroDoppler Radar for human Gait analysis, tracking more than one person, and vital sign detection of moving persons 超宽带微多普勒雷达用于人体步态分析，跟踪多人，以及移动人员的生命体征检测
2013 IEEE MTT-S International Microwave Symposium Digest (MTT) Pub Date : 2013-06-02 DOI: 10.1109/MWSYM.2013.6697702
Y. Koo, Lingyun Ren, Yazhou Wang, A. Fathy
{"title":"UWB MicroDoppler Radar for human Gait analysis, tracking more than one person, and vital sign detection of moving persons","authors":"Y. Koo, Lingyun Ren, Yazhou Wang, A. Fathy","doi":"10.1109/MWSYM.2013.6697702","DOIUrl":"https://doi.org/10.1109/MWSYM.2013.6697702","url":null,"abstract":"Pulse Doppler radars using UWB technology are becoming very popular for their wide range of capabilities and applications. UWB waveforms are used for imaging in indoor environments, target localization and classification behind walls, and evaluating micro-Doppler signatures. UWB pulse Doppler radars provide range-time-frequency representation that provides both highly accurate range and micro-Doppler information. This representation is used for detailed human gait analysis, tracking more than one subject even behind walls, and respiration rate detection even for moving subjects. That can be very useful for remotely health monitoring. In this study we experimentally investigate applying UWB to tracking more than one human subject as well as detection of respiration rate of a moving person.","PeriodicalId":128968,"journal":{"name":"2013 IEEE MTT-S International Microwave Symposium Digest (MTT)","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128387209","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: 59
Respiration harmonics cancellation for Accurate Heart Rate measurement in non-contact vital sign detection 非接触式生命体征检测中准确心率测量的呼吸谐波消除
2013 IEEE MTT-S International Microwave Symposium Digest (MTT) Pub Date : 2013-06-02 DOI: 10.1109/MWSYM.2013.6697732
Jianxuan Tu, Jenshan Lin
{"title":"Respiration harmonics cancellation for Accurate Heart Rate measurement in non-contact vital sign detection","authors":"Jianxuan Tu, Jenshan Lin","doi":"10.1109/MWSYM.2013.6697732","DOIUrl":"https://doi.org/10.1109/MWSYM.2013.6697732","url":null,"abstract":"Measuring the respiration rate (RR) and heart rate (HR) simultaneously in non-contact vital sign detection requires large dynamic range which is caused by large difference in respiratory and heart induced displacements. Generated by the demodulation method and displacements, the higher order harmonics of RR near HR might appear and cause error in HR measurement. A respiration harmonics cancellation method is proposed to eliminate the interference. Experiments are performed by a 5.8-GHz non-contact Doppler radar vital sign detection system with an S12 Any-Touch ECG-Accurate Heart Rate Monitor as the reference to verify the method. HR is measured by searching the highest peak within the typical HR range in the frequency spectrum. Results of HR measurement with and without the respiration harmonics cancellation method are compared. When the harmonics of the respiration signal are strong, using the respiration harmonics cancellation method reduces the average error from 15.9% to 3.2%.","PeriodicalId":128968,"journal":{"name":"2013 IEEE MTT-S International Microwave Symposium Digest (MTT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129794625","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: 44
A novel design method of concurrent dual-band power amplifiers including impedance tuning at inter-band modulation frequencies 一种包含带间调制频率阻抗调谐的双频并发功率放大器设计新方法
2013 IEEE MTT-S International Microwave Symposium Digest (MTT) Pub Date : 2013-06-02 DOI: 10.1109/MWSYM.2013.6697505
Xiaofan Chen, Wen-hua Chen, F. Ghannouchi, Zhenghe Feng
{"title":"A novel design method of concurrent dual-band power amplifiers including impedance tuning at inter-band modulation frequencies","authors":"Xiaofan Chen, Wen-hua Chen, F. Ghannouchi, Zhenghe Feng","doi":"10.1109/MWSYM.2013.6697505","DOIUrl":"https://doi.org/10.1109/MWSYM.2013.6697505","url":null,"abstract":"A novel design method of concurrent dual-band power amplifiers (PAs) including impedance tuning at inter-band modulation (IM) frequencies is proposed in this paper. It's shown that the impedances exhibited to the transistor at IM frequencies can affect the performance of a concurrent PA significantly. Thus it is very essential to take IM impedances into account, which can be referred to as IM impedance manipulation, or IM tuning for short. An example concurrent dual-band 1.92.6GHz PA is designed using the proposed method and a conventional concurrent dual-band PA not considering IM tuning is also designed for the purpose of comparison. Designed with a 10-Watts GaN HEMT, the proposed PA exhibits about 11 Watts output power and higher than 72.8% drain efficiency when driven equally by concurrent CW stimulus. To our best knowledge, this is the state-of-the-art performance of concurrent dual-band PA, and it's the first reported concurrent PA with IM tuning.","PeriodicalId":128968,"journal":{"name":"2013 IEEE MTT-S International Microwave Symposium Digest (MTT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130559040","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
Redefining the optimum RF Class-E switch-voltage waveform, to correct a long-used incorrect waveform 重新定义最佳RF e类开关电压波形，以纠正长期使用的不正确波形
2013 IEEE MTT-S International Microwave Symposium Digest (MTT) Pub Date : 2013-06-02 DOI: 10.1109/MWSYM.2013.6697522
N. Sokal, A. Mediano
{"title":"Redefining the optimum RF Class-E switch-voltage waveform, to correct a long-used incorrect waveform","authors":"N. Sokal, A. Mediano","doi":"10.1109/MWSYM.2013.6697522","DOIUrl":"https://doi.org/10.1109/MWSYM.2013.6697522","url":null,"abstract":"In the 1970s, authors referred to the Class-E RF power amplifier circuit as “optimum” Class E if the switch-voltage waveform had zero voltage and zero voltage-slope at the switch turn-on time. “Optimum” was a misnomer; the correct term for that condition is now known to be “nominal” Class E. The optimum switch-voltage waveform has a positive voltage (assuming an NPN or N-channel transistor switch) and near-zero voltage-slope at the switch turn-on time. Automatic and manual optimization methods are discussed; the automatic method is shown to be far superior to the manual method. Optimization typically reduces the power dissipation of the nominal Class-E amplifier by about 30%. A typical example is shown, comparing a nominal Class-E design and an optimized version of that design; the optimized version reduced the power dissipation of the nominal version by 28%.","PeriodicalId":128968,"journal":{"name":"2013 IEEE MTT-S International Microwave Symposium Digest (MTT)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126914621","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: 22
GaAs MMIC pHEMT gate metal thermometry GaAs MMIC pHEMT栅极金属测温
2013 IEEE MTT-S International Microwave Symposium Digest (MTT) Pub Date : 2013-06-02 DOI: 10.1109/MWSYM.2013.6697358
B. Schwitter, A. Parker, S. Albahrani, A. Fattorini, M. Heimlich
{"title":"GaAs MMIC pHEMT gate metal thermometry","authors":"B. Schwitter, A. Parker, S. Albahrani, A. Fattorini, M. Heimlich","doi":"10.1109/MWSYM.2013.6697358","DOIUrl":"https://doi.org/10.1109/MWSYM.2013.6697358","url":null,"abstract":"A thermal resistance measurement technique which exploits the thermal response of a GaAs pHEMT's gate metal resistance is examined. It is found that gate leakage (hole) current due to impact ionization can interfere with the measurement, but can be avoided with correct choice of bias. Measurements and thermal simulations conclude that the bias dependence of the channel heat source profile needs to be considered to improve the accuracy of channel temperature estimation.","PeriodicalId":128968,"journal":{"name":"2013 IEEE MTT-S International Microwave Symposium Digest (MTT)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124030074","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
A Brune's two-port process applied to lumped element filter modeling 将Brune的双端口过程应用于集总元素过滤器建模
2013 IEEE MTT-S International Microwave Symposium Digest (MTT) Pub Date : 2013-06-02 DOI: 10.1109/MWSYM.2013.6697487
J. Russer, F. Mukhtar, A. Gorbunova, A. Baev, Y. Kuznetsov, Peter Russer
{"title":"A Brune's two-port process applied to lumped element filter modeling","authors":"J. Russer, F. Mukhtar, A. Gorbunova, A. Baev, Y. Kuznetsov, Peter Russer","doi":"10.1109/MWSYM.2013.6697487","DOIUrl":"https://doi.org/10.1109/MWSYM.2013.6697487","url":null,"abstract":"A two-port Brune's process is applied to generate a lumped element equivalent circuit model of a Chebyshev filter of order 11 based on measured data. From the measured S parameters a rational function description is obtained by a system identification procedure applied on tabular data. This procedure consists of two main steps. The first one is a physical model order determination which can be done by using the information criteria. The second one is a linear model parameters estimation with the vector fitting method. From this rational function description the Brune's lumped element equivalent circuit is directly derived. The Brune's process allows to establish a lumped element circuit model accounting also for the circuit losses and exhibiting positive circuit elements only.","PeriodicalId":128968,"journal":{"name":"2013 IEEE MTT-S International Microwave Symposium Digest (MTT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123645697","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
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