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Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014)最新文献

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Software comparative study for RF power coupler 射频功率耦合器的软件比较研究
Pub Date : 2014-12-01 DOI: 10.1109/MMS.2014.7088968
B. Jmai, A. Rajhi, A. Gharsallah
Radio frequency system design is based on the simulation accuracy and require precise prototype. Simulation software has been widely used in a view to enhance experimental investigation. This powerful software assists users by providing them with highly accurate and reliable results. Indeed, a precise modeling is necessary to determine the adequate correction to increase the accuracy results. The aim of this paper is to treat in detail the famous electromagnetic solvers such as High Frequency Structural Simulator, Computer Simulation Technology (transient and frequency analysis) and Advanced Design System (momentum and schematic) software. The simulated results of the S-parameters for the considered power coupler from three different simulators (HFSS, ADS, CST) are discussed and are compared according to their magnitudes and phase factors; A comparative study on the performance of these simulators performances is presented. The obtained results are discussed showing that the good choice of the simulator type improves the accuracy of the design process.
射频系统的设计以仿真精度为基础,需要精确的样机。为了加强实验研究,仿真软件得到了广泛的应用。这个强大的软件帮助用户提供高度准确和可靠的结果。事实上,一个精确的建模是必要的,以确定适当的修正,以提高精度结果。本文的目的是详细讨论著名的电磁求解器,如高频结构模拟器、计算机仿真技术(瞬态和频率分析)和先进设计系统(动量和原理图)软件。讨论了三种不同仿真器(HFSS、ADS、CST)对所考虑的功率耦合器s参数的仿真结果,并根据其幅值和相位因子进行了比较;对这些模拟器的性能进行了比较研究。结果表明,选择合适的仿真器类型可以提高设计过程的精度。
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引用次数: 7
Optimization under Matlab Simulink code of a three-phase HV power transformer for microwaves generators supplying one magnetron by phase 微波发生器用三相高压电源变压器的Matlab Simulink代码优化
Pub Date : 2014-12-01 DOI: 10.1109/MMS.2014.7088787
M. Bassoui, M. Ferfra, M. Chraygane, B. Bahani
This work treat the optimization of a three-phase high voltage power supply for microwaves generators with one magnetron by phase under MATLAB SIMULINK code. The design of this power supply is composed of three π quadruple models equivalents of three-phase high voltage transformer with magnetic shunt, each one powering o cell doublers composed of capacitor and a diode and one magnetron at the output of each cell. Each π equivalent model of the transformer is composed of three inductive elements; each element is characterized by a non linear relation between flux and current. This model was tested with the help of MATLAB SIMULINK code. Following that, we will apply an optimization strategy that aims to reduce the volume of the transformer while respecting the conditions recommended by the manufacturer of magnetron: Ipeak<;1.2 A, Imean≈ 300 mA. This leads to reduce the transformer cost, and, therefore, that of all the installation and make it more economical.
本文在MATLAB SIMULINK编程环境下,对微波发生器用单相磁控管三相高压电源进行了优化设计。该电源的设计是由三个π四倍模型等效的带磁分流的三相高压互感器组成,每个模型为6个电池倍频器供电,倍频器由电容器、二极管和每个电池输出端的一个磁控管组成。变压器的每个π等效模型由三个电感元件组成;每个元件的特点是磁通和电流之间的非线性关系。利用MATLAB SIMULINK代码对该模型进行了测试。接下来,我们将采用优化策略,旨在减少变压器的体积,同时尊重磁控管制造商推荐的条件:Ipeak<;1.2 A, Imean≈300 mA。这导致降低变压器成本,并因此,所有的安装,使其更加经济。
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引用次数: 1
BeeAntDTN: A nature inspired routing protocol for delay tolerant networks BeeAntDTN:一种受自然启发的路由协议,用于容忍延迟的网络
Pub Date : 2014-12-01 DOI: 10.1109/MMS.2014.7088998
M. Ababou, R. Elkouch, M. Bellafkih, Nabil Ababou
Delay Tolerant Network is a network where there is either no end to end connection between the source and the destination or the connections are infrequent and very short in terms of delay. To ensure the messages delivery in such network, a new mechanism called store-carry and forward has been implemented, which enables DTN nodes to store received messages in their buffer and wait for an opportunity to deliver them to their final destination or to another hop in order to carry them closer to their destinations. The intermittent connections make traditional routing protocols that are based on the principle of end-to-end unadaptable in this type of environment. Different routing protocols have been proposed for the DTN environment as routings; Epidemic, Spray and Wait, ProPHET, etc. In this paper, we propose a routing strategy called BeeAntDTN adaptable to DTN networks to increase the messages delivery ratio with a minimal overhead. BeeAntDTN is inspired by the foraging behavior of insects; collecting information on the food source by the bees colony and the search for the shortest path from a food source to the nest in Ants colony. THE ONE simulator is used to check the performance of the BeeAntDTN protocol compared to the standard protocols, namely Epidemic, Spray and Wait, ProPHET. Simulation results show that the proposed approach BeeAntDTN improves the messages delivery ratio and generates a very low overhead compared to other routing protocols.
延迟容忍网络是指在源端和目的端之间没有端到端连接,或者连接不频繁且延迟非常短的网络。为了保证该网络中的消息传递,DTN节点实现了一种新的存储-携带-转发机制,该机制允许DTN节点将接收到的消息存储在其缓冲区中,并等待机会将其发送到最终目的地或另一跳,以便将其携带到离目的地更近的地方。这种断断续续的连接使得基于端到端原理的传统路由协议在这种环境下无法适应。不同的路由协议已经被提出用于DTN环境作为路由;流行病,喷雾和等待,先知等。在本文中,我们提出了一种称为BeeAntDTN的路由策略,该策略适用于DTN网络,以最小的开销增加消息传递率。BeeAntDTN的灵感来自昆虫的觅食行为;收集蜂群食物来源的信息,寻找从食物来源到蚁群巢穴的最短路径。ONE模拟器用于检查BeeAntDTN协议与标准协议(即Epidemic, Spray and Wait, ProPHET)的性能。仿真结果表明,与其他路由协议相比,提出的BeeAntDTN方法提高了消息传递率,并且产生了非常低的开销。
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引用次数: 7
Tunability and sign-switching of deflection angle in diffraction inspired unidirectional devices 衍射激发单向器件偏转角的可调性和符号切换
Pub Date : 2014-12-01 DOI: 10.1109/MMS.2014.7088917
P. Rodriguez-Ulibarri, F. Falcone, M. Beruete, A. Serebryannikov, M. Navarro‐Cía
An asymmetric transmission device based on sub-wavelength stacked hole arrays (SHA) backed with a dielectric grating is presented. The combination of diffraction modes with the dispersion characteristics of the SHA leads to very interesting electromagnetic properties such as unidirectionality, tunability and sign-switching of the outgoing wave deflection angle with just varying the angle of incidence of the impinging wave and/or changing the frequency of operation. A brief theoretical discussion, numerical results and experimental results in the V band of the millimetre-waves are provided for demonstration of the performance.
提出了一种基于亚波长堆叠空穴阵列(SHA)的非对称传输器件。衍射模式与SHA色散特性的结合导致了非常有趣的电磁特性,如单向性、可调性和出射波偏转角的符号切换,只需改变入射波的入射角和/或改变工作频率。给出了简要的理论讨论、毫米波V波段的数值结果和实验结果来证明该性能。
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引用次数: 1
Time domain analysis of magnetized ferrites using a new shift operator method 磁化铁氧体的时域分析
Pub Date : 2014-12-01 DOI: 10.1109/MMS.2014.7088915
A. Benouatas, M. L. Riabi, F. Z. Siabah
In this work, an alternative formulation of the Shift Operator Finite-Difference Time-Domain method is proposed for the analysis of general dispersive media; in this formulation, the expression of the time derivative depends on the order of the dispersive material. This method is applied then to magnetized ferrite and simple efficient equations were obtained. The dispersion characteristic of a fineline with a composite ferrite-dielectric substrate is calculated to validate the proposed formulation.
在这项工作中,提出了位移算子时域有限差分法的一种替代公式,用于分析一般色散介质;在这个公式中,时间导数的表达式取决于色散物质的阶数。将该方法应用于磁化铁氧体,得到了简单有效的方程。计算了具有复合铁氧体-介电基板的细线的色散特性,以验证所提出的公式。
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引用次数: 1
Structure of a frequency multiplier by 4 for WPAN networks applications 结构为4倍频乘器,适用于WPAN网络
Pub Date : 2014-12-01 DOI: 10.1109/MMS.2014.7088970
Maryam Abata, M. El Bekkali, S. Mazer, C. Algani
This paper presents a chain of frequency multiplier by 4 based on 0.15 μm pHEMT from UMS foundry. This frequency multiplier will be used to generate carrier frequencies in the range of [56-64 GHz] in order to perform the RF signal demodulation of wireless communication link in the mm-wave band. The multiplier consists of a quadrupler stage followed by a two-pole highpass filter and a buffer amplifier. The multiplier chain can deliver 2.78 dBm of output power with 4 dBm input power. The signal at the fundamental frequency is rejected with a rate greater than 40 dB compared to the desired signal.
本文提出了一种基于0.15 μm pHEMT的4倍频链。该倍频器将用于产生[56-64 GHz]范围内的载波频率,以便对毫米波频段的无线通信链路进行射频信号解调。该倍增器由一个四倍器级组成,随后是一个两极高通滤波器和一个缓冲放大器。乘法器链输出功率为2.78 dBm,输入功率为4dbm。基频上的信号被拒绝,与期望信号相比,拒绝率大于40 dB。
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引用次数: 2
All-metallic ε-near-zero (ENZ) lens based on ultra-narrow hollow rectangular waveguides: Experimental results 基于超窄空心矩形波导的全金属ε-近零透镜:实验结果
Pub Date : 2014-12-01 DOI: 10.1109/MMS.2014.7088925
B. Orazbayev, V. Torres, V. Pacheco-Peña, P. Rodriguez, J. Teniente, M. Beruete, M. Sorolla, M. Navarro‐Cía, N. Engheta
Here we perform numerical and experimental investigation of plano-concave all-metallic ε-near-zero (ENZ) lens with operational frequency f = 144 GHz. The ENZ lens is achieved by stacking an array of narrow hollow rectangular waveguides working near cut-off frequency. Focusing and radiation properties are numerically analyzed and measured. The enhancement of 5.61 dB and directivity of 17.6 dBi are shown. Good agreement between experimental and numerical results is demonstrated.
本文对工作频率f = 144ghz的平凹全金属ε-近零(ENZ)透镜进行了数值和实验研究。ENZ透镜是通过在截止频率附近堆叠一组狭窄的空心矩形波导来实现的。对聚焦和辐射特性进行了数值分析和测量。显示出5.61 dB的增强和17.6 dBi的指向性。实验结果与数值结果吻合较好。
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引用次数: 1
A two dimensional magneto-inductive lens for near field imaging 用于近场成像的二维磁感应透镜
Pub Date : 2014-12-01 DOI: 10.1109/MMS.2014.7088784
Akram Boubakri, F. Choubani, T. Vuong, J. David
In this paper, a planar near field magnetoinductive lens operating in the microwave range is presented. The proposed structure consists of two parallel planar arrays of metallic resonators, which are, once scaled in term of size as well as the array periodicity, the frequency of operation can be tuned over a wide frequency range. Thus the proposed design is potentially useful for many applications.
本文介绍了一种工作在微波范围内的平面近场磁感应透镜。所提出的结构由两个平行的平面金属谐振器阵列组成,一旦在尺寸和阵列周期方面进行缩放,则可以在很宽的频率范围内调谐工作频率。因此,所提出的设计对许多应用程序都有潜在的用处。
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引用次数: 0
Bandwidth-enhanced single-layer 3-dB tandem directional coupler as magic-T network 带宽增强的单层3db串联定向耦合器作为magic-T网络
Pub Date : 2014-12-01 DOI: 10.1109/MMS.2014.7088960
J. Sorocki, I. Piekarz, I. Slomian, K. Staszek, K. Wincza, S. Gruszczynski
A new approach to the design of a very broadband magic-T network focused on a single-layer realization has been proposed. In order to obtain wide bandwidth, a recently developed technique of bandwidth enhancement of tandem connected loosely coupled directional couplers has been employed. It has been shown that utilizing single-section coupled-line couplers one can realize a planar tandem coupler featuring frequency characteristics similar to these of a two-section coupled-line couplers. The proposed approach has been verified by the design and measurement of a 3-dB tandem coupler operating within 0.6-2.0 GHz frequency range with amplitude imbalance of ±0.45 dB, and the theoretical analysis of differential phase shaping to obtain magic-T properties.
提出了一种基于单层实现的超宽带magic-T网络设计新方法。为了获得较宽的带宽,采用了近年来发展起来的串联式松耦合定向耦合器的带宽增强技术。研究表明,利用单段耦合线耦合器可以实现具有与两段耦合线耦合器相似频率特性的平面串联耦合器。通过工作在0.6 ~ 2.0 GHz频率范围内、幅值不平衡为±0.45 dB的3db串联耦合器的设计和测量,以及对差分相位整形的理论分析,验证了该方法的有效性。
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引用次数: 1
An improved tree-based anticollision algorithm for RFID systems 一种改进的基于树的RFID系统防碰撞算法
Pub Date : 2014-12-01 DOI: 10.1109/MMS.2014.7088913
Fathia Ouakasse, S. Rakrak
Radio Frequency Identification RFID is increasingly used in various applications because of their high quality as well as their low costs, however there are some limitations that can hinder the proper functioning of this technology, for example, if several tags are located in the interrogation zone of the same reader, they might collide with each other during the process of identification and thus their time slots will be canceled, thereby causing a waste in slots. In this sense several algorithms have been proposed to solve the problem of collision. In this paper we propose an improved tree-based algorithm using Manchester coding. This improvement consists in building the query for searching the tags in a different way. Simulated results show that the proposed algorithm reduces the number of iterations required to identify a set of tags compared to other existing algorithms.
射频识别(RFID)由于其高质量和低成本,在各种应用中得到越来越多的应用,但也有一些限制会阻碍这项技术的正常运作,例如,如果多个标签位于同一阅读器的询问区,它们在识别过程中可能会相互碰撞,从而取消它们的时隙,从而造成时隙的浪费。从这个意义上讲,已经提出了几种算法来解决碰撞问题。本文提出了一种改进的基于树的曼彻斯特编码算法。这种改进包括以不同的方式构建搜索标记的查询。仿真结果表明,与现有算法相比,该算法减少了识别一组标签所需的迭代次数。
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引用次数: 1
期刊
Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014)
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