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2012 IEEE/MTT-S International Microwave Symposium Digest最新文献

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Injection-controlled charge pump and phased-locked loop array for beam-scanning in millimeter-wave automotive radar 用于毫米波汽车雷达波束扫描的注入控制电荷泵和锁相环阵列
Pub Date : 2012-06-17 DOI: 10.1109/MWSYM.2012.6259506
M. Chia, S. Leong, S. Woon, Alda Mulya
An injection-controlled method for charge pumped phase-locked loop (CP-PLL) has been developed for beam scanning in a 76–77 GHz automotive radar. It exploits an additional and external current source with the CP-PLL to control the voltage controlled oscillator in a production-ready SiGe front-end transceiver to create phase shift. A new 76 to 77 GHz phased array system has been implemented using this technique. The results from measurements and computer simulations validate its performance.
提出了一种用于76 ~ 77 GHz汽车雷达波束扫描的电荷泵浦锁相环注入控制方法。它利用一个附加的外部电流源和CP-PLL来控制生产就绪的SiGe前端收发器中的压控振荡器,以产生相移。利用该技术实现了一种新的76 ~ 77 GHz相控阵系统。测量和计算机仿真结果验证了其性能。
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引用次数: 1
A single-ended all-pass generalized negative-refractive-index transmission line using a bridged-T circuit 采用桥接t电路的单端全通广义负折射率传输线
Pub Date : 2012-06-17 DOI: 10.1109/MWSYM.2012.6259660
C. G. Ryan, G. Eleftheriades
An all-pass microstrip generalized negative-refractive-index transmission line is presented. A very wide return loss bandwidth (1GHz – 8 GHz) is obtained while preserving the quad-band phase characteristics.
提出了一种全通微带广义负折射率传输线。在保持四频带相位特性的同时,获得了非常宽的回波损耗带宽(1GHz - 8ghz)。
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引用次数: 6
Acoustic charge transport in graphene 石墨烯中的声波电荷输运
Pub Date : 2012-06-17 DOI: 10.1109/MWSYM.2012.6259611
V. Mišeikis, J. Cunningham, K. Saeed, R. O’Rorke, A. Davies
We present an experimental demonstration of acoustically induced current in graphene. CVD-grown layers of graphene were transferred to the surface of highly piezoelectric lithium niobate. This allowed integration of graphene with interdigital transducers used to generate and detect surface acoustic waves (SAWs). A continuous wave RF signal applied to the transducers at their resonant frequency generates a DC current flow, which has a linear dependence on the applied RF power and can be induced against an applied bias. These findings could provide the basis for new ways of studying electron transport in graphene.
我们提出了石墨烯中声感应电流的实验演示。将cvd生长的石墨烯层转移到高压电铌酸锂表面。这使得石墨烯与用于产生和探测表面声波(saw)的数字间换能器集成成为可能。在换能器的谐振频率处施加连续波射频信号会产生直流电流,该电流与所施加的射频功率呈线性关系,并且可以对施加的偏置产生感应。这些发现可以为研究石墨烯中电子传递的新方法提供基础。
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引用次数: 1
Results of field trials with wide-area ubiquitous network 广域泛在网络现场试验结果
Pub Date : 2012-06-17 DOI: 10.1109/MWSYM.2012.6258344
Hitoshi Hayashi, O. Kagami, M. Harada
For the “Internet of Things,” wireless devices are required that have small size, long life, and long range communication capability. One technology that meets these requirements is the wide-area ubiquitous network. This paper reports the field trials conducted over three years; services were remote reading / remote control of gas meters and bicycle management (location estimation / radio reachability). The test results confirm that the network can well support remote monitoring service.
“物联网”需要体积小、寿命长、远距离通信能力强的无线设备。满足这些要求的一种技术是广域泛在网络。本文报道了为期三年的田间试验;服务包括远程读取/远程控制燃气表和自行车管理(位置估计/无线电可达性)。测试结果表明,该网络可以很好地支持远程监控业务。
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引用次数: 3
Adaptive noise cancellation for two frequency radars using frequency doubling passive RF tags 基于倍频无源射频标签的双频雷达自适应噪声消除
Pub Date : 2012-06-17 DOI: 10.1109/MWSYM.2012.6259694
Aditya Singh, V. Lubecke
The use of adaptive noise cancellation technique was explored in order to separate sources of motion for a two frequency Doppler radar system. Simulations and experiments were performed. The reference signal was obtained from a harmonic radar system using passive harmonic tags. The tag signal was effectively cancelled from data simultaneously obtained from a 2.45 GHz Doppler radar, facilitating the monitoring of un-tagged source of motion and providing reliable information about both motions.
为了分离双频多普勒雷达系统的运动源,探讨了自适应噪声消除技术的应用。进行了仿真和实验。参考信号采用无源谐波标签从谐波雷达系统中获得。从2.45 GHz多普勒雷达同时获得的数据中有效地抵消了标签信号,方便了对未标记的运动源的监测,并提供了两种运动的可靠信息。
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引用次数: 13
A comprehensive electrothermal GaN HEMT model including nonlinear thermal effects 一个包含非线性热效应的综合电热GaN HEMT模型
Pub Date : 2012-06-17 DOI: 10.1109/MWSYM.2012.6259423
J. King, T. Brazil
A novel nonlinear high-power Gallium Nitride (GaN) High Electron-Mobility Transistor (HEMT) equivalent circuit model is described. Features of the model include a nonlinear thermal subnetwork extracted using straightforward measurement techniques, and a modified Angelov/Chalmers single function drain current equation. The model can very accurately predict the Pulsed IV (PIV) curves at different pulse widths and duty cycles from isothermal up to the safe-operating area (SOA) limit, with high voltage drain-source pulses. Large-signal one-tone-test results are presented and show good fidelity with measurements for the first three harmonics, as well as accurate prediction of bias point shifting with increasing input power.
提出了一种新的非线性高功率氮化镓(GaN)高电子迁移率晶体管(HEMT)等效电路模型。该模型的特征包括使用直接测量技术提取的非线性热子网络,以及改进的Angelov/Chalmers单函数漏极电流方程。该模型可以非常准确地预测从等温到安全工作区域(SOA)极限的不同脉冲宽度和占空比下的脉冲IV (PIV)曲线。给出了大信号单音测试结果,并对前三个谐波的测量结果显示了良好的保真度,并且准确地预测了输入功率增加时偏置点的移位。
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引用次数: 6
High power and efficiency power combining with multi-way TWTAs for satellite communications 高功率和高效率的电源与多路twta相结合,用于卫星通信
Pub Date : 2012-06-17 DOI: 10.1109/MWSYM.2012.6259402
S. Dong, Yazhou Dong, Ying Wang, Liming Gong
A high efficiency power combining demonstration is presented in this paper of 4 K-band TWTAs based on magic-T corporate combiners. A low loss, amplitude and phase balanced, high power corporate magic-T combiner is designed. Power combining efficiencies of greater than 90% and output power of more than 340W over a 0.6 GHz frequency band are successfully demonstrated. Such hybrid junctions can also be considered as elements within a corporate combining architecture for much higher power generating for satellite communications or other industrial applications.
本文介绍了一种基于magic-T组合机的4 k波段twta的高效功率组合演示。设计了一种低损耗、幅相平衡、大功率的企业magic-T合成器。在0.6 GHz频段上,功率组合效率大于90%,输出功率大于340W。这种混合连接也可以被视为公司组合架构中的元素,用于更高功率的卫星通信或其他工业应用。
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引用次数: 5
Development of a single board microwave sub-system based on substrate integrated waveguide (SIW) technology 基于衬底集成波导(SIW)技术的单板微波子系统的研制
Pub Date : 2012-06-17 DOI: 10.1109/MWSYM.2012.6259473
Jixin Chen, W. Hong, Z. Hao, P. Yan, Xiaowei Zhu, Jianyi Zhou, Peng Chen, K. Wu
In this paper, a novel microwave planar integration scheme is proposed based on SIW technology. All the passive components in RF transceiver are implemented using SIW, including antenna, duplexer, TX/RX filters and LO power divider. A demonstration X-band transceiver is designed in a single layer printed circuit board. The design of SIW components and RF/IF circuits are discussed, as well as various aspects of system integration. To author's knowledge, this work is the first to demonstrate a fully integrated solution based on SIW-like technology.
本文提出了一种基于SIW技术的微波平面集成方案。射频收发器中的所有无源器件均采用SIW实现,包括天线、双工器、TX/RX滤波器和LO功率分配器。在单层印刷电路板上设计了一个演示x波段收发器。讨论了SIW器件和RF/IF电路的设计,以及系统集成的各个方面。据作者所知,这项工作首次展示了基于类似siw技术的完全集成解决方案。
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引用次数: 4
UWB time domain transmission sensor for free-space moisture measurements 用于自由空间湿度测量的UWB时域传输传感器
Pub Date : 2012-06-17 DOI: 10.1109/MWSYM.2012.6258276
H. Mextorf, F. Daschner, M. Kent, R. Knochel
This paper presents an UWB time domain transmission system for free-space moisture measurements. The system is capable of transmitting UWB signals having a bandwidth of several gigahertz which illuminate the samples. The size of the samples is in the range of some of the transmitted wavelengths and is smaller than the antennas' footprints. The scattered pulses are collected by an array of receiving antennas. The received signals can be sampled instantaneously with just one receiving channel and a special combiner, which adds a time shift to each antenna path in order to separate the signals in time. Multivariate calibration is applied in order to develop a statistical model for the moisture content of the samples. An accuracy for the determination of the moisture content of 0.61% is achieved while the range of moisture is varied from 1.7% to 20%.
本文提出了一种用于自由空间水分测量的超宽带时域传输系统。该系统能够传输带宽为几兆赫兹的超宽带信号,用于照亮样品。样本的大小在某些传输波长的范围内,并且小于天线的足迹。分散的脉冲由一组接收天线收集。接收到的信号可以用一个接收通道和一个特殊的组合器进行即时采样,该组合器在每个天线路径上增加时移,以便及时分离信号。为了建立样品含水率的统计模型,采用了多变量校准。该方法测定水分的准确度为0.61%,测定范围为1.7% ~ 20%。
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引用次数: 12
Simulation for microwave heating of catalysts for CO2 reduction to CO 微波加热CO2还原成CO催化剂的模拟
Pub Date : 2012-06-17 DOI: 10.1109/MWSYM.2012.6259518
Thorsten Kayser, Andreas Melcher, G. Link, J. Jelonnek
Using the reverse water gas shift reaction (RWGS) one can produce carbon monoxide from carbon dioxide with the help of a catalyst. As the reaction is endothermic external energy in form of heat has to be applied. In the project CO2RRECT (CO2-Reaction using Regenerative Energies and Catalytic Technologies) [1], one task is to construct an applicator where the heating of the catalysts for the reaction is done by microwaves at a frequency of 2.45 GHz. This paper describes the simulation of such an applicator.
利用逆水气变换反应(RWGS),可以在催化剂的帮助下从二氧化碳中产生一氧化碳。由于反应是吸热的,所以必须施加以热形式存在的外部能量。在CO2RRECT(利用再生能源和催化技术的二氧化碳反应)项目[1]中,一项任务是构建一个涂敷器,其中用频率为2.45 GHz的微波加热反应所需的催化剂。本文介绍了这种应用器的仿真。
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引用次数: 3
期刊
2012 IEEE/MTT-S International Microwave Symposium Digest
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