| 1. | Random vibration analysis of stochastic antenna structures under wind excitation
风荷激励下天线结构的随机振动分析 |
| 2. | For the case of microstrip fractal patch antenna structure , the mom based em tool momentum of commercial software ads is used for analysis and research
对于分形微带天线结构使用基于矩量法的ads商业软件的电磁仿真工具momentum进行了分析研究。 |
| 3. | And on this basis , the finite element model of case typed radar antenna structure integrated with plate unit and entity unit was established on the basis of handling method of coupling and constraint equations
并在此基础上，基于耦合和约束方程处理方法，建立了板单元和实体单元相结合的箱体式雷达天线结构有限元模型。 |
| 4. | The present invent ion utilizes the top loading technique and the smooth tapering technique to create the design of a compact and built - in antenna which will provide a planar antenna structure with broad bandwidth and high radiation efficiency
馈入传输线的宽度大致与渐变带段的底边同宽，且顶边与渐变带段的底边密接，而底边藕接至频电路。 |
| 5. | In this paper , vivaldi uwb antenna is analyzed and designed from antenna structure , frequency - domain characteristic and time - domain characteristic three aspects , which is present good technology support for the design of the uwb antenna
本文从天线的结构,频域特性和时域特性三个方面对vivaldi超宽带天线进行了分析和设计,为超宽带天线的设计提供了良好的技术支持。 |
| 6. | Because of its special antenna structure , testing the antenna ’ s performance is necessary to prove its theory . auto measurement system of cfa array annates can measure the annates ’ s amplitude - phase character and resistance matrix quickly and effectively
舰载超视距雷达使用交叉场天线cfa ( crossedfieldantenna )作为阵列天线阵元,由于其特殊的天线结构,对其特性的理论研究也需要测量数据来验证。 |
| 7. | Thin films of ferroelectric materials can be developed to present very few losses and add no significant weight to the antenna structure . the permittivity of these materials changes with an applied dc voltage ; and this change can be used to control the resonant frequency of an antenna
将铁电材料应用到天线的设计中,外加直流偏压可以控制铁电材料的介电常数,从而控制天线的谐振频率,这样就可以制作出可调谐天线。 |
| 8. | New algorithms are presented for the efficient computation of the cylindrical wire kernel , thereby making it possible to achieve solution convergence for a wider class of wire antenna structures . this thesis also make a research on the current distribution and input impedance of half - wavelength antennas with different radii , as well as the radiation pattern of vertical thick antenna above lossy ground
本文还简要介绍了一种计算粗阵子天线矩量法公式，引入新的算法使之具有良好的收敛性，文中比较了不同半径的半波阵子天线的电流分布和输入阻抗，还讨论了地面上方垂直粗天线的辐射特性。 |
| 9. | For the case of microstrip patch antenna structure with dielectric , the fdtd based commercial software empire is used . a coaxial probe - fed microstrip patch antenna and a coaxial probe - fed stack patch antenna have been analyzed for checking its validity . on the base of that , the multi - band property of microstrip fractal patch antenna is carefully studied , and the effect of antenna ' s property by the permittivity , the size of patch , the order of the fractal and the metal box is depicted
在此基础上，着重分析了同轴馈电的sierpinski地毯形微带贴片天线以及同轴馈电耦合的sierpinski地毯形微带贴片天线的多频特性，给出了介质参数、贴片尺寸、分形天线的阶数以及金属盒对同轴馈电的sierpinski地毯形微带贴片天线特性的影响。 |
| 10. | Above all , the study status and trends in development of rfid antenna are summarized in this thesis . the basic composition and operational principle of rfid system are discussed systematically as well as the division of the fields of antenna and the coupled modes of energy capacity . and the operating frequency and typical application of rfid are investigated to determine basic antenna structure
本文首先对rfid技术的研究和发展现状进行了综述,系统的阐述了rfid的基本组成和工作原理、天线场区的划分、能量耦合的方式以及rfid的典型工作频率与应用,并确定基本的天线形式。 |
