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2006 IEEE Antennas and Propagation Society International Symposium最新文献

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Two-Arm Archimedean Spiral with Filter-Based Reactive Loading 双臂阿基米德螺旋与过滤器为基础的反应负荷
Pub Date : 2006-07-09 DOI: 10.1109/APS.2006.1711419
Z. Zhang, J. Bernhard
A new technique to increase the operating bandwidth of a two-arm Archimedean spiral antenna is presented in this paper. Unlike other conventional solutions, including absorbent cavity backing and resistive loading, this method incorporates the concept of low-pass filtering with the two-wire transmission line behavior of the spiral antenna. The reactive loading from the integrated low-pass filter design improves the impedance match at lower frequencies providing a greater bandwidth than the basic spiral design
提出了一种提高双臂阿基米德螺旋天线工作带宽的新方法。与其他传统的解决方案(包括吸收腔支撑和电阻加载)不同,该方法将低通滤波的概念与螺旋天线的双线传输线特性结合起来。集成低通滤波器设计的无功负载改善了低频的阻抗匹配,提供比基本螺旋设计更大的带宽
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引用次数: 3
The Design of the cross semi-elliptic disc monopole antenna and the band-rejected cross semi-elliptic monopole antenna for UWB Applications 超宽带交叉半椭圆圆盘单极天线和带阻交叉半椭圆单极天线的设计
Pub Date : 2006-07-09 DOI: 10.1109/APS.2006.1711675
Wen‐Shan Chen, Mao-Kai Hsu, Kai-Nan Yang, Hsin-Cheng Su, Hua‐Ming Chen
The cross semi-elliptic monopole antenna and band-rejected cross semi-elliptic monopole antenna with finite ground plane have been implemented and investigated, respectively. Experimental results show that the obtained impedance bandwidths of the two designs of antenna fit the requirement of the UWB applications. The dipole-like radiation patterns over the operating bandwidth are also shown in this paper. In addition, the proposed antenna also shows a compact size, compared to a corresponding elliptic monopole antenna. The proposed design of this antenna with finite ground is suitable for practical UWB applications
分别对有限地平面交叉半椭圆单极天线和带阻交叉半椭圆单极天线进行了实现和研究。实验结果表明,两种设计的天线阻抗带宽均符合超宽带应用的要求。本文还给出了工作带宽上的类偶极子辐射图。此外,与相应的椭圆单极天线相比,所提出的天线也显示出紧凑的尺寸。所提出的有限地天线设计适合于实际的超宽带应用
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引用次数: 2
Direct antenna modulation: analysis, design, and experiment 直接天线调制:分析、设计与实验
Pub Date : 2006-07-09 DOI: 10.1109/APS.2006.1710677
S. D. Keller, W. Palmer, W. Joines
In this paper, a symmetrical 1.5 GHz patch antenna has been designed, constructed, simulated and experimentally fine-tuned to be the radiating element in the experiment to implement direct antenna modulation. With a resonant bandwidth of about 30 MHz (using a 10 dB or better return-loss standard), there is significant room for improvement that direct antenna modulation can offer to the information bandwidth of the system. By driving the antenna at resonance and directly modulating it with an integrated Schottky diode being biased by an external pulse train, the frequency of this external modulating signal is predicted to far exceed the resonant bandwidth of the antenna and still produce a clear demodulated waveform at the receiving end of a basic communication system
本文设计、构造了一种对称的1.5 GHz贴片天线,并对其进行了仿真和实验微调,作为实验中的辐射单元,实现了天线的直接调制。谐振带宽约为30 MHz(使用10 dB或更好的回波损耗标准),直接天线调制可以为系统的信息带宽提供显著的改进空间。通过在谐振状态下驱动天线,并通过外部脉冲串偏置的集成肖特基二极管对其进行直接调制,可以预测该外部调制信号的频率远远超过天线的谐振带宽,并且在基本通信系统的接收端仍然产生清晰的解调波形
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引用次数: 4
Analysis of electrically large patch phased arrays via CFDTD 电大贴片相控阵的CFDTD分析
Pub Date : 2006-07-09 DOI: 10.1109/APS.2006.1710856
T. Q. Ho, L. Hunt, C. A. Hewett, R. Mittra, Wenhua Yu, T.G. Ready, D.A. Zolnick, M. Kragalott
To validate the CFDTD code, analysis was first carried out on a smaller array with 64 elements. The structure was built up with elements identical to those used in the 10,000-element array. Models of the validation array were constructed using both CFDTD and XFDTD. The array radiation patterns were shown for 0deg, 30deg, 45deg, and 60deg scan angles at the center frequency of 1.75 GHz. The beam was scanned in the Phi = 90deg plane. The solid lines represent CFDTD data while the dotted lines indicate the corresponding XFDTD set. As the beam is steered away from boresight, the 3-dB beamwidth increases from 12.9deg at boresight to 26.2deg at the 60deg scan angle. The first sidelobe level is about 13 dB below the peak when the main beam is pointed at boresight. The total change in peak sidelobe level is 4.0 dB as the beam is scanned from boresight to 60deg. The array directivity calculated with CFDTD is 23.0 dB, which is within 0.2 dB of the value given by XFDTD. Furthermore, the scan loss from 0deg to 60deg is observed to be 3.0 dB with CFDTD and 2.8 dB with XFDTD. These values are consistent with expectations for a well behaved array with 0.5lambda element spacing
为了验证CFDTD代码,首先对包含64个元素的较小数组进行分析。该结构由与10,000个元素数组中使用的元素相同的元素组成。验证数组的模型分别使用CFDTD和XFDTD构建。在1.75 GHz的中心频率下,显示了0°、30°、45°和60°扫描角的阵列辐射图。光束在Phi = 90度平面上被扫描。实线表示CFDTD数据,虚线表示相应的XFDTD集。当波束远离瞄准轴时,3db波束宽度从瞄准轴时的12.9度增加到60度扫描角时的26.2度。当主波束指向轴视时,第一副瓣电平比峰值低约13db。当波束从轴视扫描到60度时,峰值旁瓣电平的总变化为4.0 dB。用CFDTD计算得到的阵列指向性为23.0 dB,与XFDTD计算得到的值相差0.2 dB以内。此外,从0°到60°的扫描损耗在CFDTD中为3.0 dB,在XFDTD中为2.8 dB。这些值与期望的具有0.5lambda元素间距的性能良好的数组一致
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引用次数: 4
FDTD analysis of S-parameters for a multi-mode waveguide with CW excitation 连续波激励下多模波导s参数的FDTD分析
Pub Date : 2006-07-09 DOI: 10.1109/APS.2006.1710860
T. Hirano, Atsuhiro Nishikata, J. Hirokawa, M. Ando
In this paper, a new algorithm to obtain S-parameters using the FDTD for a multi-mode waveguide is presented. In the proposed method, the complex electric field expression is calculated in different two virtual planes, and weighting coefficients for incident and reflected waves can be obtained by solving two equations corresponding to the two virtual planes together with modal decomposition. As an example of the analysis, the vacuum window of a unit-cell for a slotted waveguide array for plasma excitation is analyzed. The frequency characteristic of reflection coefficients calculated by the FDTD method agrees well with that by the generalized scattering matrix (GSM)-method of moments (MoM) hybridization analysis
本文提出了一种利用时域有限差分法获取多模波导s参数的新算法。该方法在不同的两个虚拟平面上计算复电场表达式,通过求解两个虚拟平面对应的方程并进行模态分解,得到入射波和反射波的加权系数。作为分析的一个例子,分析了用于等离子体激励的开槽波导阵列单元的真空窗。时域有限差分法计算的反射系数的频率特性与广义散射矩阵-矩量法杂交分析结果吻合较好
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引用次数: 2
Representation of dyadic Green's functions for general anisotropic media 一般各向异性介质的并矢格林函数的表示
Pub Date : 2006-07-09 DOI: 10.1109/APS.2006.1711202
Abdullah Eroglu, Jay Kyoon Lee
A novel and practical method to obtain the complete set of the dyadic Green's functions for general anisotropic media is presented. The method is based on the k-domain representation of the fields in terms of wave matrices. The Fourier transformed Green's functions are obtained through inverses of wave matrices, which lead to the final form of the dyadic Green's functions. It is shown that the knowledge of the inverse of one type of wave matrix is sufficient to find the complete set of the dyadic Green's functions for a general anisotropic medium
提出了一种求取一般各向异性介质并矢格林函数完备集的新颖实用方法。该方法基于以波矩阵表示的场的k域表示。傅里叶变换后的格林函数通过波矩阵的逆得到,从而得到并矢格林函数的最终形式。结果表明,对于一般各向异性介质,只要知道一类波阵的逆,就足以求出并矢格林函数的完备集
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引用次数: 1
A coupled integral equation solution of chirally coated conducting bodies 手性涂层导电体的耦合积分方程解
Pub Date : 2006-07-09 DOI: 10.1109/APS.2006.1711198
D.X. Wang, E. Yung, R. Chen
This paper presents a coupled surface integral equation (CSIE) solution of electromagnetic scattering by chirally coated conducting bodies with arbitrary shape. The equivalence theorem combined with the field splitting scheme is used to formulate the fields within chiral media in terms of two sets of equivalent electric and magnetic surface currents. The boundary condition is enforced on the interface between conducting bodies and chiral media. A system of coupled matrix equations are then obtained and numerically solved using the method of moments. The calculated data for a conducting sphere coated with chiral material is compared with the exact solution and excellent agreements are observed
本文给出了任意形状手性涂层导电体电磁散射的耦合表面积分方程(CSIE)解。利用等效定理结合场分裂格式,用两组等效的表面电流和表面电流来表示手性介质内的场。在导电体与手性介质的界面上施加边界条件。然后得到了一个耦合矩阵方程组,并用矩量法进行了数值求解。对包覆手性材料的导电球的计算结果与精确解进行了比较,结果非常吻合
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引用次数: 0
Integrated broadband antenna for USB digital Terrestrial TV receiver 用于USB数字地面电视接收机的集成宽带天线
Pub Date : 2006-07-09 DOI: 10.1109/APS.2006.1711599
P. Minard, J. Pintos, A. Louzir
A built-in antenna for a USB key like digital terrestrial TV receiver allowing free to air reception of digital terrestrial TV on a computer PC has been designed, realized and tested. The housing of the compact receiver is used as part of the antenna. The antenna design is optimized so that it covers the whole UHF frequency bandwidth with good radiation efficiency, while its size is imposed by the USB-key form factor. The obtained results are compliant with simulations
本文设计、实现并测试了一种内置天线,用于USB key式数字地面电视接收器,可在计算机PC上免费接收数字地面电视。紧凑型接收机的外壳用作天线的一部分。优化天线设计,使其覆盖整个UHF频段,具有良好的辐射效率,而其尺寸则由USB-key外形因素决定。所得结果与仿真结果吻合较好
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引用次数: 3
Design and Fabrication of Three Dimensional Dielectric and Magnetic Composites for Satcom Antenna Applications 卫星通信天线用三维介电磁性复合材料的设计与制造
Pub Date : 2006-07-09 DOI: 10.1109/APS.2006.1711042
G. Kiziltas
In this paper we presented the design of a compact SATCOM antenna with pre-specified bandwidth requirements. We demonstrated that a novel design procedure accompanied by filtering and post processing techniques is capable of designing novel material composites with tremendous performance improvement for broadband antennas. The proposed design procedure was based on the integration of full wave finite element analysis (FEA) and topology design method employing sequential linear programming (SLP). A simple yet effective dry powder compacting method - "sand painting" was invented that is capable of producing multi-layer multi-ceramic variations in 3D. This fabrication technique is specifically invented to produce the resulting volumetric multimaterial variation using off-the-shelf powders and can be extended to allow for magnetic and conductor inclusions as discussed at the conference
本文提出了一种具有预先设定带宽要求的小型卫星通信天线的设计。我们证明了一种新的设计过程伴随着滤波和后处理技术能够设计出具有巨大性能改进的新型材料复合材料用于宽带天线。所提出的设计方法是基于全波有限元分析(FEA)和采用顺序线性规划(SLP)的拓扑设计方法的集成。发明了一种简单而有效的干粉压实方法-“沙漆”,能够在3D中产生多层多陶瓷变化。这种制造技术是专门发明的,用于使用现成的粉末产生相应的体积多材料变化,并且可以扩展到允许在会议上讨论的磁性和导体内含物
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引用次数: 0
A Miniaturized Planar Space-filling Curve Antenna with Wideband Monopole-like Radiation Characteristics 一种具有宽带类单极辐射特性的小型化平面空间填充曲线天线
Pub Date : 2006-07-09 DOI: 10.1109/APS.2006.1711431
J. McVay, A. Hoorfar
In this paper, the characteristics of utilizing planar metallic paths in the form of Peano and Hilbert space-filling curves (SFC) are investigated to provide top-loading properties to electrically short monopole antenna elements. Because the higher order SFC curve paths are resonant at frequencies for which the area that encloses the curve can be considered as electrically small, these curves may offer resonant loading characteristics in compact, low-profile and potentially conformal antenna designs, with monopole-like radiation patterns
本文研究了利用皮亚诺和希尔伯特空间填充曲线(SFC)形式的平面金属路径为电短单极天线元件提供顶载特性的特性。由于高阶SFC曲线路径在环绕曲线的区域可以被认为是电小的频率下谐振,因此这些曲线可以在具有单极辐射模式的紧凑、低轮廓和潜在共形天线设计中提供谐振负载特性
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引用次数: 10
期刊
2006 IEEE Antennas and Propagation Society International Symposium
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