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2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)最新文献

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Diversity antenna with slits for WBAN applications WBAN应用的带缝隙分集天线
Pub Date : 2014-07-06 DOI: 10.1109/APS.2014.6904672
D. Kang, Jaehoon Choi
In this paper, a diversity antenna with slits for WBAN applications is proposed. The antenna consists of two T-shaped monopoles and three slits. Through three slits, a high isolation characteristic is achieved and the resonant frequency can be controlled. To analyze the antenna performance over a human body, the proposed antenna over a human equivalent flat phantom is investigated through simulation. A return loss characteristic of the antenna is insensitive to the existence of the phantom. The antenna operates in 2.4 GHz ISM band with the isolation higher than 23 dB.
本文提出了一种适用于WBAN应用的带缝隙分集天线。天线由两个t形单极子和三个狭缝组成。通过三狭缝,实现了高隔离特性,并可控制谐振频率。为了分析天线在人体上的性能,通过仿真研究了该天线在人体等效平面模体上的性能。天线的回波损耗特性对虚影的存在不敏感。天线工作在2.4 GHz ISM频段,隔离度大于23 dB。
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引用次数: 0
Optimized design of dual-band aperture-coupled stacked circularly polarized microstrip antennas 双频孔耦合叠置圆极化微带天线的优化设计
Pub Date : 2014-07-06 DOI: 10.1109/APS.2014.6905082
C. Peng, I. Chen, L.-Q Chen
In this article, a dual-band aperture-coupled stacked circularly polarized microstrip antenna was proposed. This antenna consists of metallic square slot, metallic square patch, crossed aperture and microstrip feeding structure, making it easy to combine directional, circularly polarization and dual-band operation. The optimized antenna exhibits a good impedance matching within the UHF band (902MHz-928MHz) and ISM band (2.4GHz-2.5GHz). The experimental results of the constructed prototype are provided.
本文提出了一种双频孔耦合叠层圆极化微带天线。该天线由金属方槽、金属方贴片、交叉孔径和微带馈电结构组成,便于组合定向、圆极化和双频工作。优化后的天线在UHF频段(902MHz-928MHz)和ISM频段(2.4GHz-2.5GHz)内具有良好的阻抗匹配。给出了所构建的样机的实验结果。
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引用次数: 3
Time modulated beamformer for sidelobe blanking 用于旁瓣消隐的时间调制波束形成器
Pub Date : 2014-07-06 DOI: 10.1109/APS.2014.6905207
W. Barott, B. Himed
Time-modulation is applied to an array pattern by alternating a beamformer between two sets of beamforming coefficients. These are selected so signals arriving in the sidelobes are BPSK modulated by the beam-switching while signals in the main lobe are not. This technique enables sidelobe blanking using a single beamformer, which is simpler than other approaches.
时间调制是通过在两组波束形成系数之间交替使用波束形成器来应用于阵列方向图的。这些是被选择的,所以到达旁瓣的信号被波束开关BPSK调制,而在主瓣的信号则不是。该技术使用单个波束形成器实现旁瓣消隐,比其他方法简单。
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引用次数: 0
Miniaturized wide-band dielectric resonator antenna for ISM applications 用于ISM应用的小型化宽带介电谐振器天线
Pub Date : 2014-07-06 DOI: 10.1109/APS.2014.6905319
M. Morsy, Hemachandra Reddy Gorla
A new design of a miniaturized wide-band dielectric resonator antenna(DRA) at 2.45GHz is presented. The design employs two different techniques for widening the band width and miniaturizing the total size of the designed DRA. By suspending the dielectric resonator over a ground plane, we are able to increase the 10dB operating bandwidth of DRA to 34%. And by constructing a conducting wall on one side of the DRA, the total volume of the DRA antenna is reduced to 1.2×0.8×1.9cm3. Parametric studies and systematic analysis are used to reach the optimized design.
提出了一种新的2.45GHz小型化宽带介质谐振器天线设计方案。该设计采用了两种不同的技术来扩大带宽和缩小设计的DRA的总尺寸。通过将介质谐振器悬浮在地平面上,我们能够将DRA的10dB工作带宽提高到34%。通过在DRA的一侧建造导电墙,DRA天线的总体积减少到1.2×0.8×1.9cm3。采用参数化研究和系统分析的方法进行了优化设计。
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引用次数: 2
Comparizon of 3D printed Plastic and micromachined Teflon Lenses for WiGig modules 用于WiGig模块的3D打印塑料和微加工聚四氟乙烯透镜的比较
Pub Date : 2014-07-06 DOI: 10.1109/APS.2014.6904386
A. Bisognin, D. Titz, C. Luxey, G. Jacquemod, R. Pilard, F. Gianesello, D. Gloria, F. Ferrero, D. Lugara, Jorge R. Costa, C. Fernandes
In this paper, we compare the performance of micromachined Teflon and 3D printed Plastic lenses for WiGig modules. Both are based on extended hemispherical shapes. Reusing a HDI module with built-in antenna as a source, we demonstrate an antenna gain improvement of respectively 9 dB and 11 dB for the Plastic and the Teflon lenses. Full-wave simulations are verified by measurements.
在本文中,我们比较了微加工聚四氟乙烯和3D打印塑料透镜用于WiGig模块的性能。两者都是基于扩展的半球形。使用内置天线的HDI模块作为源,我们演示了塑料透镜和聚四氟乙烯透镜的天线增益分别提高了9 dB和11 dB。全波仿真通过实测验证。
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引用次数: 2
Formulation of the Hardy space method in a Discontinuous Galerkin framework 不连续Galerkin框架中Hardy空间方法的表述
Pub Date : 2014-07-06 DOI: 10.1109/APS.2014.6905449
S. Hughey, B. Shanker, A. Baczewski
Local transparent boundary conditions (TBCs) based upon the pole condition have shown a great deal of promise in recent years. Only recently has the pole condition been applied to the Maxwell Equations with the aid of vector Hardy space infinite elements [1]. In this work, we describe a variation on the conformal Finite Element formulation presented in [1] within an interior penalty Discontinuous Galerkin (DG) framework. Our primary reasons for doing so are the use of nonconformal meshing at the interior/exterior boundary and the use of locally-enriched function spaces to include desirable physics in numerical solutions.
近年来,基于极点条件的局部透明边界条件(tbc)显示出很大的发展前景。直到最近才将极点条件应用到向量Hardy空间无穷元的Maxwell方程中[1]。在这项工作中,我们描述了在内罚不连续伽辽金(DG)框架内对[1]中提出的保形有限元公式的一种变化。我们这样做的主要原因是在内部/外部边界使用非保形网格,并使用局部丰富的函数空间在数值解中包含理想的物理。
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引用次数: 0
Robust, wearable, on-body antenna relying on half mode substrate integrated waveguide techniques 基于半模基板集成波导技术的坚固耐用的体上天线
Pub Date : 2014-07-06 DOI: 10.1109/APS.2014.6904488
S. Agneessens, H. Rogier, R. Moro, M. Bozzi
A compact, robust, wearable antenna for body-worn applications in the 2.4 GHz Industrial Medical and Scientific band is designed, fabricated and tested. This novel compact textile cavity backed slot antenna combines a half-mode substrate integrated waveguide topology with an additional row of shorting vias for miniaturization. Excellent free space performance is achieved with a measured 4.6 % impedance bandwidth, maximal gain of 4.7 dBi and radiation efficiency of 81.3 %. On-body measurements reveal minimal frequency detuning when the antenna is worn by a test subject as well as a negligible impedance bandwidth reduction to 4.5 %. The low calculated Specific Absorption Rate of 0.51 W/kg averaged over 1 g of tissue demonstrates high antenna body isolation. Therefore, this design is an attractive option as antenna in smart textile systems.
设计、制造和测试了一种紧凑、坚固、可穿戴的天线,适用于2.4 GHz工业医疗和科学频段的身体穿戴应用。这种新颖紧凑的纺织腔背槽天线结合了半模基片集成波导拓扑结构和额外的一排短通孔,以实现小型化。测量到的阻抗带宽为4.6%,最大增益为4.7 dBi,辐射效率为81.3%,实现了优异的自由空间性能。人体测量显示,当测试对象佩戴天线时,频率失谐最小,阻抗带宽减少可忽略不计,仅为4.5%。低计算比吸收率0.51 W/kg平均超过1克组织表明天线体高隔离。因此,这种设计是智能纺织系统天线的一个有吸引力的选择。
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引用次数: 1
Investigating failure mechanisms in high-power microwave frequency selective surfaces 研究高功率微波频率选择表面的失效机制
Pub Date : 2014-07-06 DOI: 10.1109/APS.2014.6905356
Chien‐Hao Liu, J. Booske, N. Behdad
When operated in high-power pulsed systems, frequency selective surfaces (FSS) are susceptible to breakdown. Breakdown in these devices changes the frequency response of the device and can result in permanent damage in certain situations. Recently, it has been demonstrated that breakdown induced at a certain location in an FSS can result in breakdown at other locations (e.g. neighboring unit cells) where the intensity of the incident EM wave is not high enough to cause breakdown under normal circumstances. In this paper, we examine the physical cause of this phenomenon and demonstrate that this is caused by the generation of vacuum ultraviolet (VUV) radiation, at the location of the initial discharge, which facilitates breakdown at other locations. Furthermore, through a series of experimental studies, we identify the distances over which this VUV radiation has a high enough intensity to facilitate breakdown at the neighboring unit cells. The results presented in this paper are expected to be useful in mitigating and localizing the adverse impacts of breakdown in HPM FSSs covering large aperture dimensions or in designing devices that generate large scale breakdown (e.g. periodic plasmas).
当在大功率脉冲系统中工作时,频率选择表面(FSS)容易被击穿。这些设备的故障会改变设备的频率响应,在某些情况下可能导致永久性损坏。最近,有研究表明,在FSS中某一位置引起的击穿可能导致入射电磁波强度在正常情况下不足以引起击穿的其他位置(例如相邻的单元格)击穿。在本文中,我们研究了这一现象的物理原因,并证明这是由真空紫外线(VUV)辐射的产生引起的,在初始放电的位置,这有助于在其他位置击穿。此外,通过一系列的实验研究,我们确定了该VUV辐射具有足够高的强度以促进相邻单元细胞击穿的距离。本文提出的结果有望用于减轻和定位覆盖大孔径尺寸的HPM fss击穿的不利影响,或用于设计产生大规模击穿的设备(例如周期性等离子体)。
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引用次数: 2
Band-notched UWB equiangular spiral antenna 带缺口超宽带等角螺旋天线
Pub Date : 2014-07-06 DOI: 10.1109/APS.2014.6904987
Jae Jeon, John T. Chang, A. Pham
A band-notched ultra-wideband equiangular spiral antenna is presented. With the spiral antenna on the top layer, bottom side is used for a secondary resonant structure to create a notch filter response. VSWR of 2:1 is achieved for the FCC UWB band, which is 3.1 to 10.6 GHz. Notch response is created over the IEEE 802.11a band, 5.15 to 5.85 GHz, VSWR reaching 12:1 at the center of the band at 5.5 GHz. Suppression of radiation in this band is evident in its gain profile over frequency and in current density plot around the resonant structure as well.
提出了一种带陷波超宽带等角螺旋天线。螺旋天线在顶层,底部用于二次谐振结构,以产生陷波滤波器响应。在3.1 ~ 10.6 GHz的FCC UWB频段,可实现2:1的驻波比。陷波响应是在IEEE 802.11a频段(5.15至5.85 GHz)上产生的,在5.5 GHz频段中心的VSWR达到12:1。该波段的辐射抑制在其频率增益曲线和谐振结构周围的电流密度图中也很明显。
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引用次数: 3
OpenCL GPU 100× acceleration of physical optics OpenCL GPU物理光学100倍加速
Pub Date : 2014-07-06 DOI: 10.1109/APS.2014.6905136
A. Densmore, Y. Rahmat-Samii
The application of the graphics processor to computing antenna radiation patterns provides a substantial acceleration in speed. The same brute force physical optics (PO) code; e.g., a symmetric single reflector of two hundred forty wavelengths diameter, that runs single-threaded C/C++ on an Intel Core 2 Q8200 CPU and compiled to be optimized for speed, runs one hundred times faster when ported to OpenCL and run on an AMD HD5850 GPU hosted by the CPU system. Porting the code to OpenCL involves opening the processing loops to be run in parallel and some additional code to host the GPU in the CPU system. The ability to accelerate antenna pattern computations by a factor of one hundred provides real substantial benefits when many patterns need to be computed repeatedly, such as when optimizing a reflector system.
图形处理器在计算天线辐射模式上的应用提供了速度上的实质性加速。相同的物理光学(PO)代码;例如,一个240波长直径的对称单反射器,在英特尔酷睿2 Q8200 CPU上运行单线程C/ c++,并经过编译以优化速度,当移植到OpenCL并在CPU系统托管的AMD HD5850 GPU上运行时,运行速度要快100倍。将代码移植到OpenCL需要打开并行运行的处理循环和一些额外的代码来在CPU系统中托管GPU。当需要重复计算许多模式时,例如优化反射器系统时,将天线方向图计算速度提高一百倍的能力提供了真正的实质性好处。
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引用次数: 3
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2014 IEEE Antennas and Propagation Society International Symposium (APSURSI)
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