共查询到19条相似文献,搜索用时 171 毫秒
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标签天线的优化设计是实现标签小型化的关键。以2.45 GHz的碎片天线为设计对象,利用遗传算法对尺寸受限的标签天线结构进行优化设计,采用FDTD算法对天线的阻抗特性和辐射特性进行了仿真分析,得到与标签芯片相匹配的输入阻抗,通过与实物的对比分析,验证了设计方法的正确性。 相似文献
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电磁仿真技术在现代天线设计中发挥着重要作用。讨论了一种结合遗传算法和全波电磁仿真软件HFSS 的天线优化设计方法。采用遗传算法进行天线设计,能够直接设计一种新结构天线,并易于对天线的结构进行调整。在介绍了遗传算法基本原理的基础上,阐述了遗传算法在天线仿真和优化设计中的具体应用问题。通过VBS脚本将遗传算法与Ansoft HFSS 连接起来,对一种电磁耦合馈电的双极化毫米波微带天线进行了优化设计,展宽了该天线的阻抗带宽,天线指标满足设计要求,表明了采用遗传算法进行天线仿真的可行性。 相似文献
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分析了天线间相互干扰的参考量---耦合度的计算方法,以达到耦合度最小为目标,采用非支配排序遗传算法(NSGA)对车顶天线布局的电磁兼容性能进行优化设计,编程实现了车顶天线布局优化。 相似文献
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采用双种群遗传算法(DPGA)结合时域有限差分法(FDTD)优化八木天线的单元间距和长度,以实现更优方向图。DPGA由全局与局部两个种群分工协作完成进化任务,可对每个种群选取不同的目标函数、适应度评价指标和遗传运算方法。在DPGA优化过程中FDTD的任务是对每一个进化出的天线设计进行性能评估。通过优化两种八木天线结构,得到了较文献中更优的结果,证明此方法的可行性。 相似文献
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本文分析了影响了车顶天线布局的主要因素,采用遗传算法对车顶天线布局的电磁兼容性能进行优化设计,编程实现了车顶天线布局优化。 相似文献
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GaoFeng LiuQizhong ShanRunhong ZhangHou 《电子科学学刊(英文版)》2004,21(4):342-345
This letter investigates an efficient design procedure integrating the Genetic Algorithm (GA) with the Finite Difference Time Domain (FDTD) for the fast optimal design of Smart Antenna Arrays (SAA). The FDTD is used to analyze SAA with mutual coupling. Then,on the basis of the Maximal Signal to Noise Ratio (MSNR) criteria, the GA is applied to the optimization of weighting elements and structure of SAA. Finally, the effectiveness of the analysis is evaluated by experimental antenna arrays. 相似文献
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R. Ghayoula A. Smida A. Gharsallah D. Grenier 《International Journal of Communication Systems》2014,27(12):3706-3719
This paper presents practical design of a smart antenna system based on direction‐of‐arrival estimation and Dolph–Chebyshev beam forming. Direction‐of‐arrival estimation is based on the multiple signal classification algorithm for identifying the directions of the source signals incident on the sensor array comprising the smart antenna system. The smart antenna system design involves a hardware part, which provides real data measurements of the incident signals received by the sensor array. This paper presents the Dolph–Chebyshev method for the synthesis and design of antenna arrays with periodic element spacing. A Field‐Programmable Gate Array implementation is presented for an antenna array application employing digital beamforming. The array comprises 10 elements, equal in number receiving radio frequency and intermediate frequency components, as well as a Spartan‐3E Field‐Programmable Gate Array‐based unit, which is responsible for the control of the array. Low‐cost and switched‐beam, and fully adaptive antenna array suitable for 2‐GHz applications are proposed in this paper. Copyright © 2013 John Wiley & Sons, Ltd. 相似文献
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Yong‐Woong Jang 《ETRI Journal》2001,23(1):33-38
A numerical simulation and an experimental implementation of T‐shaped microstrip‐fed printed slot array antenna are presented in this paper. The proposed antenna with relative permittivity 4.3 and thickness 1.0mm is analyzed by the finite‐difference time‐domain (FDTD) method. The dependence of design parameters on the bandwidth characteristics is investigated. The measured bandwidth of twin‐slot array antenna is from 1.37 GHz to 2.388 GHz, which is approximately 53.9 % for return loss less than or equal to ‐10 dB. The bandwidth of twin‐slot is about 1.06 % larger than that of single‐slot antenna. The measured results are in good agreement with the FDTD results. 相似文献
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Douvalis V. Yang Hao Parini C.G. 《Antennas and Propagation, IEEE Transactions on》2006,54(5):1393-1398
In this paper, a novel active integrated conical horn array is presented. Specifically, a 95 GHz quasioptically fed mixer integrated with an annular slot ring antenna was used as the basic element of the proposed active system. For efficient reception, a low cost micro-machined conical horn array was fabricated and placed on the top of active elements. A modified nonorthogonal finite-difference time-domain (FDTD) approach was applied for analyzing the basic conical horn antenna and a hybrid matrix manipulation technique for efficient antenna array modeling. The proposed active conical horn antenna array was fabricated and measured. Numerical simulations have verified the design at its distributed stages presenting very good agreement with the experimental data. 相似文献