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

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RFID tags with double rectangular spiral antennas, system stability optimization under delayed electromagnetic interference and parasitic effects 双矩形螺旋天线RFID标签延迟电磁干扰和寄生效应下系统稳定性优化
O. Aluf
In this article, we discuss the crucial subject of RFID tags with double rectangular spiral antennas, system stability optimization under delayed electromagnetic interference and parasitic effects. Two antennas are connected in series by microstrip line with parasitic effects. We define V1(t) as the voltage on the first antenna inductance and V2(t) as the voltage on the second antenna inductance. Due to electromagnetic interference there are differences in time delays, with respect to the first and second rectangular spiral antennas voltages and voltage derivatives. The delayed voltages are V1(t - τ1) and V2(t - τ2) respectively (τ1 ≠ τ2) and the delayed voltage derivatives are dV1(t - Δ1)/dt, dV2(t - Δ2)/dt respectively Δμ. Additionally, there is a delay in time for the microstrip parasitic effects Δμ. The double rectangular spiral antenna system equivalent circuit can be described in terms of delayed differential equations, depending on variable parameters and delays. The stability of a given steady state is determined by the graphs of some function of τ1, τ2, Δ1, Δ2 and Δμ.
本文讨论了双矩形螺旋天线RFID标签的关键问题,延迟电磁干扰和寄生效应下的系统稳定性优化。两个天线通过带寄生效应的微带线串联。我们定义V1(t)为第一个天线电感上的电压,V2(t)为第二个天线电感上的电压。由于电磁干扰,相对于第一和第二矩形螺旋天线的电压和电压导数,时延存在差异。延时电压分别为V1(t - τ1)和V2(t - τ2) (τ1≠τ2),延时电压导数分别为dV1(t - Δ1)/dt和dV2(t - Δ2)/dt Δμ。此外,微带寄生效应在时间上有延迟Δμ。双矩形螺旋天线系统等效电路可以用随变参数和时延变化的时滞微分方程来描述。给定稳态的稳定性由τ1, τ2, Δ1, Δ2和Δμ的某些函数的图决定。
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引用次数: 1
A 16-nm FinFET 16-GHz differential LC-VCO 16纳米FinFET 16 ghz差分LC-VCO
Ioannis Zographopoulos, F. Plessas, Emmanouil A. Antonopoulos, F. Foukalas
In this paper, a 16-GHz FinFET differential Voltage-Controlled Oscillator (VCO) is presented. Filtering is used at the common source node of the cross-coupled transistors as well as other techniques to effectively lower phase noise. The oscillator is designed using 16nm FinFET Predictive Technology Models (PTMs) [1], achieves -106.553dBc/Hz at 1MHz offset, and dissipates 1.071mA from a 0.85V supply.
本文设计了一种16ghz FinFET差分压控振荡器(VCO)。在交叉耦合晶体管的共源节点处采用滤波和其他技术来有效地降低相位噪声。该振荡器采用16nm FinFET预测技术模型(PTMs)[1]设计,在1MHz偏移时达到-106.553dBc/Hz,从0.85V电源消耗1.071mA。
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引用次数: 1
Study of a thin applicator for Microwave Ablation of liver malignant tumor 肝恶性肿瘤微波消融薄敷器的研究
N. Tal, Dor Oz, Y. Leviatan
Microwave Ablation (MWA) is a minimally invasive method for treatment of malignant tumors. This paper studies a thin interstitial applicator that produces a nearly spherical ablation zone in malignant liver tumor and investigates how the frequency of operation can affect the quality of MWA procedure. The paper then proposes a similar thin applicator but much shorter for MWA.
微波消融术(MWA)是一种微创治疗恶性肿瘤的方法。本文研究了一种薄间质应用器在恶性肝肿瘤中产生近球形消融区,并探讨了操作频率对MWA手术质量的影响。然后,本文提出了一种类似的薄涂敷器,但更短的MWA。
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引用次数: 2
Multi-level 20 Gbit/s PSSS transmission using a linearity-limited 240 GHz wireless frontend 采用线性受限240 GHz无线前端的20 Gbit/s多电平PSSS传输
T. Messinger, K. KrishneGowda, F. Boes, D. Meier, A. Wolf, A. Tessmann, R. Kraemer, I. Kallfass
In this paper, we investigate the applicability of parallel sequence spread spectrum (PSSS) modulation in high bandwidth millimeter wave communication systems using a 240GHz monolithic microwave integrated circuit (MMIC) based radio frequency (RF) frontend. The transmitter (Tx) and receiver (Rx) are connected directly via an attenuator in an incoherent back-to-back setup using two independent local oscillator (LO) sources. Although the system was restricted to phase modulated signals due to limited linearity when using conventional modulated signals, a transmission using a multivalent PSSS sequence with a spectral efficiency of 1 bit/s/Hz succeeded thanks to the introduced coding gain. The recovered data is evaluated in terms of eye opening and bit error rate (BER). At a gross data rate of 20 Gbit/s, an eye opening of 40% and a BER of 5.4 × 10-5 were observed.
在本文中,我们研究了并行序列扩频(PSSS)调制在基于240GHz单片微波集成电路(MMIC)射频(RF)前端的高带宽毫米波通信系统中的适用性。发射器(Tx)和接收器(Rx)通过衰减器直接连接,使用两个独立的本地振荡器(LO)源在非相干背靠背设置中。尽管在使用传统调制信号时,由于线性度有限,系统受到相位调制信号的限制,但由于引入了编码增益,使用频谱效率为1 bit/s/Hz的多价PSSS序列传输成功。恢复后的数据以开眼率和误码率(BER)进行评估。在总数据速率为20 Gbit/s时,观察到40%的开眼率和5.4 × 10-5的误码率。
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引用次数: 9
A novel concept for RF-system-in-package high volume production measurements 射频封装系统大批量生产测量的新概念
A. Rosenberg, N. Buadana, Amir Lin, Roni Livney
Today more and more multifunction RF-SIP (System-In-Package) modules, in SMD (Surface-Mount-Technology) package style, come into high volume production phase. There are many challenges in automatic RF measurements of RF-SIP-SMD devices. Each different SIP must have dedicated load-board that contains multiple RF connectors as well as a rigorous RF considerations and design. Furthermore, RF test equipment with complicated calibration of high frequency transmission path is needed. The module described in this paper is a multifunction Doppler detector based of silicon chip packaged in standard QFN molding process. It contains internal VCO, down-converter, active IF-filter and active IF amplifier. This work presents the development and application for testing a high volume production, using a novel load-board that makes RF test equipment and RF calibrations unnecessary. All measurable parameters are translated to analog DC voltages in a smart and pre-calibrated way. This makes the RF-SIP-SMD measurements easier and one can set voltage limits, low and high, by a simple digital voltmeter connected directly to a computer. Limits can be changed easily according to desired SIP performance, in purpose to decide if the measured device is “PASS” or “FAIL”.
如今,越来越多的SMD(表面贴装技术)封装风格的多功能RF-SIP(系统级封装)模块进入大批量生产阶段。RF- sip - smd器件的自动射频测量存在许多挑战。每个不同的SIP必须有专用的负载板,其中包含多个RF连接器以及严格的RF考虑和设计。此外,还需要具有复杂的高频传输路径校准的射频测试设备。本文所描述的模块是一种基于硅芯片的多功能多普勒探测器,采用标准的QFN成型工艺封装。它包含内部压控振荡器、下变频器、有源中频滤波器和有源中频放大器。这项工作介绍了测试大批量生产的开发和应用,使用一种新型负载板,使射频测试设备和射频校准变得不必要。所有可测量参数都以智能和预校准的方式转换为模拟直流电压。这使得RF-SIP-SMD测量更容易,并且可以通过直接连接到计算机的简单数字电压表设置低电压和高电压限制。限制可以根据所需的SIP性能轻松更改,目的是决定被测设备是“通过”还是“失败”。
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引用次数: 0
Noise characteristic analysis of multi-port network in active electrically scanned array radar 有源电扫描阵列雷达多端口网络噪声特性分析
Yu Hongbiao
Noise power and noise figure are detailedly analysed and deduced in theory for mult-port network in active electrically scanned array(AESA) radar, especially in AESA radar. Mathematical expressions of output noise power and total noise figure of network are given out under various conditions. Accordingly, this provides a basis of theories for multi-port network and radar receiver system design, the test method of array noise figure. Finally two application examples are gived to verify accuracy of the formula.
对有源电扫描阵列(AESA)雷达,特别是AESA雷达中多端口网络的噪声功率和噪声系数进行了详细的理论分析和推导。给出了各种条件下网络输出噪声功率和总噪声系数的数学表达式。从而为多端口网络和雷达接收机系统的设计、阵列噪声系数的测试方法提供了理论基础。最后给出了两个应用实例,验证了公式的准确性。
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引用次数: 0
RF-DAC challenges for mm-Wave transmitter in CMOS process 毫米波发射机在CMOS工艺中的RF-DAC挑战
Tomer Ben-Oz, E. Cohen, E. Socher
This paper presents a part of the digital concept in the form of a mm-Wave Digital to Analog Radio Frequency Converter design. The mm-Wave transmitter is I/Q Cartesian RFDAC based on all-digital modulator concepts and challenges in the 28 nm CMOS process. Results and ideas presented are based on simulations and design requirements. The RFDAC implementation is a direct Base Band to RF conversion which offers a competitive solution to the classical RF transmitter chain. Final design is a class B current steering RFDAC for improved efficiency. In addition, the linearity vs. efficiency tradeoffs of the IQ Cartesian combining is discussed, assuming the simplified model of IQ interactions presented as well as considerations for beamforming architecture. Expected ENOB limitation before calibration would be of 7 bits reaching an EVM of 30dB.
本文以毫米波数模射频转换器的设计形式提出了数字概念的一部分。毫米波发射机是基于全数字调制器概念和28纳米CMOS工艺挑战的I/Q笛卡尔RFDAC。所提出的结果和思想是基于仿真和设计要求。RFDAC实现是基带到RF的直接转换,为经典RF发射机链提供了具有竞争力的解决方案。最终设计的是一个B类电流转向RFDAC,以提高效率。此外,假设IQ相互作用的简化模型以及波束形成结构的考虑,讨论了IQ笛卡尔组合的线性与效率权衡。校准前的预期ENOB限制为7位,达到30dB的EVM。
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引用次数: 0
A 300 GHz multi-stage balanced variable gain amplifier with Tandem-X couplers 采用串联- x耦合器的300 GHz多级平衡变增益放大器
I. Dan, D. Meier, S. Wagner, A. Leuther, A. Tessmann, H. Massler, I. Kallfass
This paper presents the design and measured performance of an H-Band (220-325 GHz) submilimeter-wave monolithic integrated circuit (S-MMIC) implementing a balanced variable-gain low-noise amplifier (VGA) based on Tandem-X couplers for use in next generation communication systems. This amplifier will be used as first stage in an integrated wideband receiver for 300 GHz wireless communication for indoor environments. It provides low-noise pre-amplification as well as gain control in front of a quadrature down-conversion mixer.
本文介绍了一种h波段(220-325 GHz)亚毫米波单片集成电路(S-MMIC)的设计和测试性能,该电路实现了一种用于下一代通信系统的基于串联- x耦合器的平衡变增益低噪声放大器(VGA)。该放大器将作为集成宽带接收器的一级,用于室内环境的300 GHz无线通信。它在正交下变频混频器前提供低噪声预放大和增益控制。
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引用次数: 0
Josephson generation is good for pixel in the array of passive imaging system 约瑟夫森生成有利于被动成像系统阵列像素的生成
J. Qiu, Shengchang Lan, Alexander Denisov, F. Soldovieri, M. He
One of the critical technologies is combining both of superconductive and semiconductor technologies on a single substrate, including creating Josephson junction (JJ) near the gate of a semiconductor transistor. The use of JJ in self-pumping mode regime as one of the heterodyne detection methods can provide a new trend for designing modern passive terahertz imaging system. Further development will allow to realize multi-spectrum systems with electronically tunable band. This paper discussed the theoretical analysis on the noise characteristics of the JJ as the pixels in the array of passive imaging system. The analytical result shows that JJ is a possible solution to improve the sensitivity of modern multi-spectrum passive imaging systems.
其中一项关键技术是在单一衬底上结合超导和半导体技术,包括在半导体晶体管栅极附近创建约瑟夫森结(JJ)。在自抽运模式下使用JJ作为外差检测方法之一,可以为现代被动太赫兹成像系统的设计提供新的趋势。进一步的发展将允许实现多频谱系统与电子可调谐的波段。本文对作为被动成像系统阵元的JJ噪声特性进行了理论分析。分析结果表明,JJ是提高现代多光谱被动成像系统灵敏度的一种可能解决方案。
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引用次数: 0
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
M. Kozlov, G. Schaefers
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.
我们数值研究了钛棒放置在ASTM F2182-11a高介电常数介质中所产生的体积损耗密度和温升,该介质由射频(RF) 64 MHz平面波激发。对连续波激励和时变激励进行了三维电磁和热学联合模拟。如果时变射频激发达到短时间比吸收率限值限值,并且植入物热时间常数等于或小于10s,则磁共振成像期间植入物上和附近的射频感应加热可以比连续射频激发引起的射频感应加热达到IEC 60601-2-33规定的全身比吸收率限值限值高出2倍。如果热时间常数明显长于10 s,则连续波激励可以可靠地评估最高温升。
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引用次数: 3
期刊
2015 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS)
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