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2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON)最新文献

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Microwave noncontact measurement of pulse wave velocity for healthcare applications 医疗保健用微波非接触测量脉冲波速
2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON) Pub Date : 2010-04-12 DOI: 10.1109/WAMICON.2010.5461872
Li Lu, Changzhi Li, D. Lie
{"title":"Microwave noncontact measurement of pulse wave velocity for healthcare applications","authors":"Li Lu, Changzhi Li, D. Lie","doi":"10.1109/WAMICON.2010.5461872","DOIUrl":"https://doi.org/10.1109/WAMICON.2010.5461872","url":null,"abstract":"In this paper, a noncontact method of measuring the pulse wave velocity (PWV) is proposed based on the Doppler phase modulation effect. System level design and simulations are presented to demonstrate the detection mechanism. Preliminary experimental results are reported.","PeriodicalId":112402,"journal":{"name":"2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130749547","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: 2
WiMAX bandpass filter using hybrid microstrip Defected-Ground-Structure 混合微带缺陷接地结构WiMAX带通滤波器
2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON) Pub Date : 2010-04-12 DOI: 10.1109/WAMICON.2010.5461893
I. Tang, Wei-Shuo Wu, Jhe-Hao Syu, Simon Cimin Li, Chi-Min Li
{"title":"WiMAX bandpass filter using hybrid microstrip Defected-Ground-Structure","authors":"I. Tang, Wei-Shuo Wu, Jhe-Hao Syu, Simon Cimin Li, Chi-Min Li","doi":"10.1109/WAMICON.2010.5461893","DOIUrl":"https://doi.org/10.1109/WAMICON.2010.5461893","url":null,"abstract":"A novel and compact WiMAX microstrip bandpass filter is proposed. The filter employs a very wide bandwidth from 2 to 11 GHz under NLOS environment of the IEEE 802.16-2004 standard, and with a 3-dB fractional bandwidth of greater than 138%. The proposed hybrid WiMAX band-pass filter had return loss more than 17 dB in the passband, and also demonstrated a reject band from 12.4 GHz to more than 20 GHz at −20 dB.","PeriodicalId":112402,"journal":{"name":"2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123152398","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
Design of GaN HEMT based Doherty amplifiers 基于GaN HEMT的Doherty放大器设计
2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON) Pub Date : 2010-04-12 DOI: 10.1109/WAMICON.2010.5461860
A. Z. Markos, K. Bathich, G. Boeck
{"title":"Design of GaN HEMT based Doherty amplifiers","authors":"A. Z. Markos, K. Bathich, G. Boeck","doi":"10.1109/WAMICON.2010.5461860","DOIUrl":"https://doi.org/10.1109/WAMICON.2010.5461860","url":null,"abstract":"In this paper the design of high efficiency unsymmetrical Doherty power amplifiers (PAs) will be presented. The Doherty PAs were designed to achieve high average efficiency for digitally modulated signals with high peak to average power ratio (PAR) used in third (3G) and fourth (4G) generation systems. The Doherty amplifiers have been designed using two unequal sized GaN devices for the main Class-AB and peaking Class-C amplifiers. In the first narrow band design, a 50 W Doherty amplifier has been implemented at 2.5 GHz. A drain efficiency of 54 % (48 % power added efficiency (PAE)) has been measured at its maximum output power of 47 dBm. The efficiency remains constant up to the 6 dB output power back-off. Moreover, the Doherty PA has been linearized to achieve an Adjacent Channel Leakage Ratio (ACLR) of −46 dBc at 10 MHz offset for a 10 MHz (UMTS-LTE) signal with a PAR of 8.5 dB, and an average output power of 40 dBm. 44 % PAE was measured for this signal constellation. In a second design, the status of a wideband unsymmetrical Doherty PA with 31 % fractional bandwidth will be reported.","PeriodicalId":112402,"journal":{"name":"2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125291843","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: 19
An analytic technique for trade-off of noise measure and mismatch loss for low noise amplifier design 低噪声放大器设计中噪声测量与失配损失权衡分析技术
2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON) Pub Date : 2010-04-12 DOI: 10.1109/WAMICON.2010.5461878
A. Victor, J. Nath
{"title":"An analytic technique for trade-off of noise measure and mismatch loss for low noise amplifier design","authors":"A. Victor, J. Nath","doi":"10.1109/WAMICON.2010.5461878","DOIUrl":"https://doi.org/10.1109/WAMICON.2010.5461878","url":null,"abstract":"An analytic technique and figure-of-merit (Fnm) for the trade-off of noise measure and mismatch loss in the design of a low noise amplifier is presented. The trade-off between various design parameters as a function of inductive source degeneration is evaluated from design curves developed and are shown to be unique to the selected device. Several devices demonstrated conditions whereby the use of source degeneration leads to instability and must be avoided. The technique is straightforward and permits pre-screening of potential devices being considered for low noise amplifier design. The resulting design curves permit accurate selection of the range of acceptable feedback values to achieve desired performance. The new figure-of-merit allows designers to choose the optimum value of source inductance either analytically or graphically. The new methodology is discussed and applied to a low noise amplifier design at 10.24 GHz.","PeriodicalId":112402,"journal":{"name":"2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114013663","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
Thermal optimization of a flip-chip WiFi RF front-end IC 一种倒装WiFi射频前端集成电路的热优化
2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON) Pub Date : 2010-04-12 DOI: 10.1109/WAMICON.2010.5461884
K. Laursen, C. Yuen, M. Adams, D. Chu, Henry Chen, Y. Pao
{"title":"Thermal optimization of a flip-chip WiFi RF front-end IC","authors":"K. Laursen, C. Yuen, M. Adams, D. Chu, Henry Chen, Y. Pao","doi":"10.1109/WAMICON.2010.5461884","DOIUrl":"https://doi.org/10.1109/WAMICON.2010.5461884","url":null,"abstract":"Flip-chip designs offer several advantages over traditional designs. However, thermal characteristics must be considered carefully, or the end result may have high junction temperatures and thus poor performance and poor reliability. This paper presents some guidelines for thermal optimization in flip-chip designs, and presents the results of a flip-chip single die WiFi FEM developed using Bi-FET (HBT+E/D-PHEMT) technology. In this design, both solder bumps and copper pillar bumps were developed for the flip chip process.","PeriodicalId":112402,"journal":{"name":"2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127617384","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: 2
Evaluating the robustness of tunable adaptive antenna arrays 可调谐自适应天线阵列鲁棒性评估
2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON) Pub Date : 2010-04-12 DOI: 10.1109/WAMICON.2010.5461864
B. Horwath, T. Al-Attar
{"title":"Evaluating the robustness of tunable adaptive antenna arrays","authors":"B. Horwath, T. Al-Attar","doi":"10.1109/WAMICON.2010.5461864","DOIUrl":"https://doi.org/10.1109/WAMICON.2010.5461864","url":null,"abstract":"We present an evaluation of tunable adaptive antenna array performance for achieving useful field patterns. Utilizing antenna elements which can be tuned by a controllable impedance “black box”, we characterize the array's ability to achieve robust patterns for both broadcast and unicast communications. Simulation results demonstrate the impact of these tunable elements and the use of IMPATT diodes is introduced as a means to enable the tunable adaptive antenna array.","PeriodicalId":112402,"journal":{"name":"2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121514119","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
An embedded uniform linear monopole antenna array in a wing structure of a UAV 一种嵌入均匀线性单极天线阵的无人机机翼结构
2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON) Pub Date : 2010-04-12 DOI: 10.1109/WAMICON.2010.5461886
M. Sharawi, D. Aloi, O. Rawashdeh
{"title":"An embedded uniform linear monopole antenna array in a wing structure of a UAV","authors":"M. Sharawi, D. Aloi, O. Rawashdeh","doi":"10.1109/WAMICON.2010.5461886","DOIUrl":"https://doi.org/10.1109/WAMICON.2010.5461886","url":null,"abstract":"In this work we present the design and fabrication of a linear array of printed monopole antennas embedded within the wing structure of a small Unmanned Aerial Vehicle (UAV) and operating in the 2.4 GHz ISM band. Integration of antenna elements within UAV structures will reduce the weight and cost. Also, the use of embedded antenna arrays will increase the communication range and data throughput. A 4-element array is considered. Simulation and measurement results are shown and compared.","PeriodicalId":112402,"journal":{"name":"2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133669553","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
Waveform engineering applied to linear-efficient PA design 波形工程应用于线性高效放大器设计
2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON) Pub Date : 2010-04-12 DOI: 10.1109/WAMICON.2010.5461847
J. Lees, Muhammad Akmal, S. Bensmida, S. Woodington, S. Cripps, J. Benedikt, K. Morris, M. Beach, J. Mcgeehan, P. Tasker
{"title":"Waveform engineering applied to linear-efficient PA design","authors":"J. Lees, Muhammad Akmal, S. Bensmida, S. Woodington, S. Cripps, J. Benedikt, K. Morris, M. Beach, J. Mcgeehan, P. Tasker","doi":"10.1109/WAMICON.2010.5461847","DOIUrl":"https://doi.org/10.1109/WAMICON.2010.5461847","url":null,"abstract":"Low-frequency, baseband effects in Power Amplifiers can become particularly important when steps are taken to improve operational efficiency through the application of ‘envelope’ based approaches such as Envelope Elimination and Restoration (EER) and Envelope Tracking (ET). The aim of this paper is to demonstrate how a broadband modulated time-domain measurement system, when used in combination with active IF load-pull, can be employed to gain valuable insight into the behaviour of high-frequency power transistors whilst operating under modulated conditions. Also considered is the interesting idea of how PA linearity can be improved using the very mechanisms that are employed to improve efficiency.","PeriodicalId":112402,"journal":{"name":"2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131839394","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: 12
Transmitter architecture for the evaluation of beamforming schemes in 802.11n wireless LANs 用于评估802.11n无线局域网中波束形成方案的发射机结构
2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON) Pub Date : 2010-04-12 DOI: 10.1109/WAMICON.2010.5461867
M. Thériault, S. Roy, O. Sentieys
{"title":"Transmitter architecture for the evaluation of beamforming schemes in 802.11n wireless LANs","authors":"M. Thériault, S. Roy, O. Sentieys","doi":"10.1109/WAMICON.2010.5461867","DOIUrl":"https://doi.org/10.1109/WAMICON.2010.5461867","url":null,"abstract":"The need for speed and reliability in wireless local area networks is constantly increasing. The IEEE 802.11n standard aims to offer better data rates and performances by combining OFDM and MIMO techniques. Transmit beamforming is one of these techniques and should allow a stronger, more reliable signal for the intended user, while reducing interference towards other users. In this paper, we present the realization of an 802.11n transmitter aimed at comparing different transmit beamforming schemes.","PeriodicalId":112402,"journal":{"name":"2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115834007","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
Microwave building block filters using genetic optimization 使用遗传优化的微波构建块滤波器
2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON) Pub Date : 2010-04-12 DOI: 10.1109/WAMICON.2010.5461862
J. Beneat, P. Jarry, N. Boutheiller
{"title":"Microwave building block filters using genetic optimization","authors":"J. Beneat, P. Jarry, N. Boutheiller","doi":"10.1109/WAMICON.2010.5461862","DOIUrl":"https://doi.org/10.1109/WAMICON.2010.5461862","url":null,"abstract":"The filters are composed of a cascade of non-loaded rectangular cavities where several resonant modes are considered. The cavities are interconnected through rectangular waveguide sections. All resonant modes are used near their cutoff frequencies to reduce the size of the filters. Rather than relying on modeling the coupling coefficients between cavities, the technique is based on defining multimodal scattering matrices for all the building blocks composing the filter. The main building blocks are simple rectangular waveguide sections and change in cross section dimension discontinuities. A fast custom simulator based on the scattering matrices was developed and was used with an optimization method based on the genetic algorithm to design filters with Generalized Chebsyhev type characteristics. A 14GHZ forth order filter with two transmission zeros as well as a 20GHZ seventh order filter with four transmission zeros were designed and built and their measured responses are provided.","PeriodicalId":112402,"journal":{"name":"2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121022060","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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