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2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)最新文献

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A compact circularly-polarized array based on superdirective elements 基于超指示元素的紧凑圆极化阵列
Pub Date : 2016-09-01 DOI: 10.1109/MECAP.2016.7790082
A. Haskou, A. Sharaiha, S. Collardey
In this paper, a new strategy for designing compact Circularly-Polarized (CP) arrays is proposed. This approach consists of using small parasitic superdirective arrays as unit elements. An array is designed for 866MHz RFID band and a parametric analysis on the inter-element distance is performed to highlight the trade-offs between the antenna-dimensions, -directivity and radiation efficiency. For total dimensions of 220 × 220 × 25.8mm3(0.58λ × 0.58λ × 0.075λ), the array has a CP directivity of 10.3dBic and a radiation efficiency of 38.5%.
本文提出了一种设计紧凑圆极化(CP)阵列的新策略。这种方法包括使用小的寄生超指令数组作为单元元素。设计了一个866MHz射频识别频段阵列,并对元件间距离进行了参数分析,以突出天线尺寸,指向性和辐射效率之间的权衡。总尺寸为220 × 220 × 25.8mm3(0.58λ × 0.58λ × 0.075λ)时,阵列的CP指向性为10.3dBic,辐射效率为38.5%。
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引用次数: 1
Beamwidth control of sectional waveguide antennas using parabolic slotted surfaces 采用抛物面开槽面截面波导天线的波束宽度控制
Pub Date : 2016-09-01 DOI: 10.1109/MECAP.2016.7790120
A. Harmouch, H. Haddad, Samara Gharbieh
This research is concerned with controlling the radiation pattern of a sectional cylindrical slotted waveguide antenna (SCSWA) in both horizontal and vertical planes to make the antenna more directive. In order to cover an area several SCSWAs are used, so the beam should be narrow in the horizontal plane to avoid interference. To control the beam in the vertical plane, the number, the width, and the position of slots could be varied. In this research, the focus is on controlling the radiation pattern in the horizontal plane by changing the concavity of the surface where the slots are placed. A series of simulations were performed on the proposed antenna at a desired frequency of 2.4 GHz, the results showed good control over the antenna's performance.
本文主要研究如何控制截面圆柱波导天线在水平和垂直方向上的辐射方向图,使其具有更好的方向性。为了覆盖一个区域,使用了几个单晶网格,因此波束在水平面上应该很窄,以避免干扰。为了控制梁在垂直平面上,可以改变槽的数量、宽度和位置。在本研究中,重点是通过改变槽面凹凸度来控制水平面上的辐射方向图。在期望频率为2.4 GHz的情况下对天线进行了一系列的仿真,结果表明天线的性能得到了很好的控制。
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引用次数: 0
Enhanced properties of a novel dual band shorted square patch with E-shaped slot for GSM/WLAN bands GSM/WLAN双频段e型槽短方贴片的增强性能
Pub Date : 2016-09-01 DOI: 10.1109/MECAP.2016.7790117
H. Omidi, H. Oraizi
This paper introduces a novel dual band shorted square patch, with E-shaped slot and improved radiation properties at GSM and WLAN frequency bands (1.8GHz and 2.4 GHz). The shorted part is designed to operate with a ground plane which is a significant part of the antenna assembly. The proposed antenna has been fabricated on FR4 substrate and has been simulated beside SAM (Specific Anthropomorphic Mannequin) phantom in CST. The optimized SAR (specific absorption rate) for 1.8GHz is 0.425 Kg/W and for 2.4 GHz is 0.3935Kg/W.
本文介绍了一种新型的双频短方形贴片,该贴片具有e形槽,在GSM和WLAN频段(1.8GHz和2.4 GHz)的辐射性能得到了改善。短路部分被设计为与接地平面一起工作,接地平面是天线组件的重要部分。该天线已在FR4基板上制作,并在CST中与SAM (Specific Anthropomorphic Mannequin)模型进行了仿真。1.8GHz和2.4 GHz时的最佳比吸收率分别为0.425 Kg/W和0.3935Kg/W。
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引用次数: 0
Compact dual wide band D-CRLH three way power divider 紧凑型双宽带D-CRLH三路功率分压器
Pub Date : 2016-09-01 DOI: 10.1109/MECAP.2016.7790095
A. F. Daw, M. Abdalla, H. Elhennawy
A compact dual ultra-wide band power dividers based on three cells of dual composite right/left handed microstrip structure presented in this article. This introduced topology proposes dual band for multiband orthogonal frequency division multiplexing from 1 GHz-4.8 GHz with insertion loss -5 dB for three way power divider. The second band designed for direct sequence ultra-wideband from 6.2 GHz-9.5 GHz with insertion loss -5.2 dB for the divider. The rejection band extended from 5 to 5.8 GHz is introduces to avoid the interference between WLAN and UWB applications. The article elaborates the equivalent circuit model, analytical study, 3D full wave simulation and fabrication measurement results. Furthermore, the design realizes compactness size 45.37 % over conventional T-junction power divider, and also, realizes compactness size 30.05 % over the most recently compact dividers.
本文提出了一种基于三单元双复合左/右微带结构的紧凑型双超宽带功率分压器。所介绍的拓扑结构为三路功率分配器在1 GHz-4.8 GHz范围内的多频带正交频分复用提供了双频段,插入损耗为-5 dB。第二个频段设计用于直接序列超宽带,从6.2 GHz到9.5 GHz,分频器的插入损耗为-5.2 dB。为了避免无线局域网和超宽带应用之间的干扰,引入了从5 GHz扩展到5.8 GHz的抑制频段。本文详细阐述了等效电路模型、分析研究、三维全波仿真和制作测量结果。此外,该设计比传统的t结功率分压器紧凑45.37%,比最新的紧凑型分压器紧凑30.5%。
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引用次数: 2
Near-field measurement system with 3D magnetic-field probe design for dosimetric applications 近场测量系统与三维磁场探头设计的剂量学应用
Pub Date : 2016-09-01 DOI: 10.1109/MECAP.2016.7790103
K. Jomaa, F. Ndagijimana, J. Jomaah, H. Ayad
In this paper the design of a new 3D magnetic field (H-field) probe with a near-field scanning system is presented. The proposed system was developed in order to determine the magnetic near-field emitted by electronic devices. The designed isotropic H-field probe consists of three orthogonal and identical loops each of diameter of 6 mm having 3 turns. The antenna factor of the designed probe is presented for a frequency range from 1 MHz to 1 GHz. In order to verify the performance of the designed probe, magnetic near-field measurements were done for a standard circuit. The comparison between the measured results and the theoretical calculations was performed for validation.
本文介绍了一种具有近场扫描系统的新型三维磁场(h场)探头的设计。该系统是为了测量电子设备发射的磁场而开发的。所设计的各向同性h场探头由三个正交且相同的回路组成,每个回路的直径为6mm,有3匝。给出了所设计探头在1mhz ~ 1ghz频率范围内的天线系数。为了验证所设计探头的性能,对一个标准电路进行了近磁场测量。将实测结果与理论计算结果进行了比较,验证了理论计算的正确性。
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引用次数: 11
Novel composite right/left handed ferrite metamaterials components 新型复合右手/左手铁氧体超材料元件
Pub Date : 2016-09-01 DOI: 10.1109/MECAP.2016.7790094
M. Abdalla, Zhirun Hu
This paper is composed of two parts. First, we explain the basic concepts of general composite right / left handed transmission line designs using ferrite medium. We explain its different analysis unlike conventional dielectric case. Hence, the ferrite left handed transmission line properties are emphasized compared to dielectric one. Second, we present some novel microwave device applications based on ferrite left handed transmission lines. The theories of these devices are based on the concepts introduced in the first part. These applications comprise quarter wavelength transformers and zeroth order resonator. Such applications have the advantages of compact size in addition to the tunability properties. Moreover, the proposed devices require small DC magnetic bias.
本文由两部分组成。首先,我们解释了使用铁氧体介质的一般复合右/左手传输线设计的基本概念。我们解释了它与传统介质情况的不同分析。因此,铁氧体左手传输线的性质比电介质传输线更受重视。其次,我们提出了一些基于铁氧体左手传输线的新型微波器件应用。这些装置的理论是基于第一部分介绍的概念。这些应用包括四分之一波长变压器和零阶谐振器。这种应用除了具有可调性外,还具有体积小的优点。此外,所提出的器件需要小的直流偏磁。
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引用次数: 0
Massive MIMO exploitation to reduce HARQ delay in wireless communication system 利用大规模MIMO减少无线通信系统中HARQ时延
Pub Date : 2016-09-01 DOI: 10.1109/MECAP.2016.7790122
Nidal Zarifeh, A. Kabbani, M. El-Absi, T. Kreul, T. Kaiser
As recommended by 5th generation Public-Private Partnership (5G-PPP) and Next Generation Mobile Networks (NGMN), one of the most important 5G requirements is to minimize the delay within the network for delay-sensitive services. Main objective of this work is to exploit massive MIMO technology to reduce Hybrid Automatic Repeat Query (HARQ) retransmission delay. Massive MIMO indoor environment is created by a 3D ray-tracing tool to simulate the received power, phase, delay, and angle of arrival of each ray in the channel. Two sizes of rectangular antenna array are used to evaluate the performance of beamforming in enhancing the bit error rate. This reflects directly on the mean and maximum numbers of packet retransmission. The angle between user-equipments is considered to evaluate the effect of inter-user interference on HARQ. This work opens the door to develop smarter resource allocation algorithms in 5G for delay-sensitive services based on the location and the angle of arrival of the users.
根据第五代公私合作伙伴关系(5G- ppp)和下一代移动网络(NGMN)的建议,5G最重要的要求之一是尽量减少网络内的延迟,以实现延迟敏感业务。本研究的主要目标是利用大规模MIMO技术来降低混合自动重复查询(HARQ)重传延迟。大规模MIMO室内环境由3D光线追踪工具创建,以模拟通道中每条光线的接收功率、相位、延迟和到达角度。采用两种尺寸的矩形天线阵列,对波束成形在提高误码率方面的性能进行了评价。这直接反映在数据包重传的平均值和最大值上。考虑用户与设备之间的夹角来评估用户间干扰对HARQ的影响。这项工作为开发基于用户位置和到达角度的延迟敏感服务的5G智能资源分配算法打开了大门。
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引用次数: 3
Circularly polarized open loop antenna backed by square AMC with different feeding mechanisms 圆极化开环天线由不同馈入机构的方形AMC支撑
Pub Date : 2016-09-01 DOI: 10.1109/MECAP.2016.7790093
H. Al-Lawati, S. Khamas
Two circularly polarized open loop antennas, backed by square patch AMC ground planes and operating at the GPS Li band are presented. The first one is fed by a co-planar waveguide (CPW) and the second one is fed by a vertical probe. The CPW antenna has provided measured S11 and AR bandwidths of ~11% and 6% respectively compared to ~21% and 5% for the vertical probe fed antenna. Both antennas have provided useful bore-sight gain at the desired frequency.
提出了两种工作在GPS Li波段的圆极化开环天线,以方形贴片AMC地平面为支撑。前者由共面波导(CPW)馈电,后者由垂直探头馈电。CPW天线的S11和AR测量带宽分别为11%和6%,而垂直探针馈电天线的S11和AR测量带宽分别为21%和5%。两根天线都在期望的频率上提供了有用的孔视增益。
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引用次数: 2
Design of tilted taper slot antenna for 5G base station antenna circular array 5G基站天线圆阵倾斜锥形槽天线设计
Pub Date : 2016-09-01 DOI: 10.1109/MECAP.2016.7790104
Ayman El-Bacha, R. Sarkis
This communication presents the design of down tilted 3D Taper Slot Antennas suitable for base stations of future generation mobile communication. We designed a novel Vivaldi antenna with wide frequency band performance covering a larger band than the 4th Generation with a vertical tilting to suit the bases station coverage requirements. A downscaled version of this metal only antenna is advantageous for higher frequency bands of the 5th Generation. The available space inside of the 3D structure is suitable to integrate low noise amplifier as near as possible to the feeding point minimizing the losses in the cable while maintaining good performance in terms of gain and efficiency. Circular antenna array of (4G) and (5G) antenna elements are simulated in terms of reflection coefficient and inter-element coupling. We developed and measured a prototype of a single (4G) antenna. Good agreement is obtained between simulation and measurements.
本文提出了一种适用于下一代移动通信基站的向下倾斜三维锥形槽天线的设计。我们设计了一种新型的Vivaldi天线,具有宽频带性能,覆盖比第四代天线更大的频带,并具有垂直倾斜,以满足基站覆盖要求。这种金属天线的缩小版本有利于第五代的更高频段。三维结构内部的可用空间适合在尽可能靠近馈电点的地方集成低噪声放大器,从而最大限度地减少电缆的损耗,同时保持良好的增益和效率性能。从反射系数和元间耦合两个方面对(4G)和(5G)天线单元的圆形天线阵列进行了仿真。我们开发并测量了单个(4G)天线的原型。仿真结果与实测结果吻合较好。
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引用次数: 14
Design of concentric bee-hived antenna array using the Invasive Weed Optimization 基于入侵杂草优化的同心蜂箱天线阵列设计
Pub Date : 2016-09-01 DOI: 10.1109/MECAP.2016.7790085
H. Oraizi, B. Bahreini
In this paper, an optimum design of a novel non-uniformly excited planar array is presented by the use of Invasive Weed Optimization algorithm. In the proposed planar array, elements are arranged in a bee-hived configuration and positioned in XY plane producing a symmetrical pattern in every φ cut. The optimization algorithm is utilized for determining the amplitudes and phases of array elements to cut down the side-lobe levels. The results show that the array with bee-hived configuration provides an almost omnidirectional pattern and also the peak side lobe level of the synthesized radiation pattern could be made quite low in comparison with circular and rectangular configurations.
本文利用入侵杂草优化算法对一种新型非均匀激励平面阵列进行了优化设计。在所提出的平面阵列中,元件以蜂箱结构排列,并位于XY平面上,在每个φ切割中产生对称图案。利用优化算法确定阵元的幅值和相位以降低旁瓣电平。结果表明,蜂箱阵列提供了几乎全向的方向图,并且与圆形和矩形阵列相比,可以使合成辐射方向图的峰值旁瓣电平相当低。
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引用次数: 0
期刊
2016 IEEE Middle East Conference on Antennas and Propagation (MECAP)
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