您的位置: 专家智库 > >

国家自然科学基金(61071058)

作品数:6 被引量:14H指数:2
相关作者:张介秋袁航盈马华裴志斌徐卓更多>>
相关机构:空军工程大学西安交通大学更多>>
发文基金:国家自然科学基金国家重点基础研究发展计划陕西省电子信息系统综合集成重点实验室基金更多>>
相关领域:理学电子电信更多>>

文献类型

  • 6篇中文期刊文章

领域

  • 3篇电子电信
  • 3篇理学

主题

  • 2篇DUAL-B...
  • 1篇导航
  • 1篇导航系统
  • 1篇等效介电常数
  • 1篇天线
  • 1篇贴片
  • 1篇贴片天线
  • 1篇频率选择表面
  • 1篇微带
  • 1篇微带天线
  • 1篇微带贴片
  • 1篇微带贴片天线
  • 1篇卫星
  • 1篇卫星导航
  • 1篇卫星导航系统
  • 1篇小型化
  • 1篇介电常数
  • 1篇基板
  • 1篇北斗
  • 1篇北斗卫星

机构

  • 2篇空军工程大学
  • 1篇西安交通大学

作者

  • 2篇张介秋
  • 1篇屈绍波
  • 1篇王甲富
  • 1篇王新华
  • 1篇吴翔
  • 1篇周航
  • 1篇徐卓
  • 1篇裴志斌
  • 1篇袁航盈
  • 1篇马华

传媒

  • 4篇Chines...
  • 1篇红外与毫米波...
  • 1篇空军工程大学...

年份

  • 3篇2012
  • 3篇2011
6 条 记 录,以下是 1-6
排序方式:
Dual-band frequency selective surface with large band separation and stable performance
2012年
A new technique of designing a dual-band frequency selective surface with large band separation is presented.This technique is based on a delicately designed topology of L-and Ku-band microwave filters.The two band-pass responses are generated by a capacitively-loaded square-loop frequency selective surface and an aperture-coupled frequency selective surface,respectively.A Faraday cage is located between the two frequency selective surface structures to eliminate undesired couplings.Based on this technique,a dual-band frequency selective surface with large band separation is designed,which possesses large band separation,high selectivity,and stable performance under various incident angles and different polarizations.
周航屈绍波彭卫东林宝勤王甲富马华张介秋柏鹏王徐华徐卓
一种用于“北斗”卫星导航系统的小型化微带贴片天线被引量:6
2012年
基于"北斗"天线小型化的考虑,利用高介陶瓷基板(εr=16)来设计"北斗"卫星导航系统微带贴片天线,该天线采用切角结构,同轴线馈电方式,工作在"北斗"一代的S频段(2 492±5 MHz,右旋圆极化)。采用Ansoft公司三维电磁仿真软件HFSS进行仿真分析,数值仿真结果表明:S11<-10 dB的阻抗带宽为62 MHz,3 dB极化轴比带宽为15 MHz;采用矢量网络分析仪对天线实物进行性能测定,实测结果表明,S11<-10 dB的阻抗带宽为66 MHz,3 dB圆极化轴比带宽为12 MHz,仿真结果与测试结果基本吻合,天线性能良好,满足"北斗"接收天线设计要求。该天线在满足北斗接收天线的性能的同时,由于采用高介陶瓷作为基板,使得其与传统天线相比,尺寸缩减了75%,具有一定的应用前景。
袁航盈张介秋
关键词:北斗卫星导航系统微带天线小型化
Multiband terahertz metamaterial absorber被引量:2
2011年
This paper reports the design of a multiband metamaterial (MM) absorber in the terahertz region. Theoretical and simulated results show that the absorber has four distinct and strong absorption points at 1.69, 2.76, 3.41 and 5.06 THz, which are consistent with 'fingerprints' of some explosive materials. The retrieved material parameters show that the impedance of MM could be tuned to match approximately the impedance of the free space to minimise the reflectance at absorption frequencies and large power loss exists at absorption frequencies. The distribution of the power loss indicates that the absorber is an excellent electromagnetic wave collector: the wave is first trapped and reinforced in certain specific locations and then consumed. This multiband absorber has applications in the detection of explosives and materials characterisation.
顾超屈绍波裴志斌徐卓刘嘉顾巍
关键词:MULTIBANDTERAHERTZ
基于超材料等效介质理论的带通频率选择表面设计及验证被引量:5
2011年
提出了一种构建超材料带通频率选择表面的新方法,该方法通过调节单元结构的等效介电常数实现.金属丝阵列在等离子频率以下等效介电常数为负,产生传输禁带,在金属丝阵列中加入介电常数符合Lorentz模型的短金属线结构,可得到一维带通频率选择表面,理论分析和仿真计算充分验证了这种方法的可行性.基于这种方法,将一维超材料频率选择表面单元拓展设计为二维对称结构,实现了一种宽入射角、极化无关的频率选择表面,最后加工了两个样品对基于等效介质理论的频率选择表面设计方法进行了实验验证.这种设计方法不必考虑常规频率选择表面所涉及的复杂计算和多参数优化等问题,拓展了频率选择表面的设计思路,对于THz频段频率选择表面的设计,及多通带、可调、小型化频率选择表面都具有借鉴意义.
吴翔裴志斌屈绍波徐卓张介秋马华王甲富王新华周航
关键词:频率选择表面超材料等效介电常数
Dual-band frequency selective surface with quasi-elliptic bandpass response
2012年
Based on the substrate integrated waveguide technology, we present a dual-band frequency selective surface (FSS) with a quasi-elliptic bandpass response. The characteristics of the quasi-elliptic bandpass response are realized by shunting two substrate integrated waveguide cavities of different sizes, with the same slots on both sides of the metal surfaces. Four cavities of different sizes and two slots of different sizes are used to design the novel FSS. Every bandpass response with sharp sidebands is induced by two transmission nulls that are generated by the coupling between the slot aperture resonance and the cavity resonance. The simulation results show that such dual-band FSS has the advantages of high selectivity and stable performance at different oblique incident angles. Moreover, it is easy to fabricate.
周航屈绍波彭卫东王甲富马华张介秋柏鹏徐卓
A metamaterial absorber with direction-selective and polarisation-insensitive properties被引量:1
2011年
This paper reports the design of a metamaterial absorber with direction-selective and polarisation-insensitive property. Both theoretical and simulated results reveal that the absorber has a distinct absorption point with direction selectivity at 7.48 GHz, which is related to the resonance of the metamaterial and is not influenced by the polarisation. The retrieved impedance indicates that the impedance of the absorber can be tuned to approximatively match the impedance of the free space on one side and not to match the impedance of the free space on the other side. This design can result in the minimal reflectance, the minimal transmission and the highest absorbance at the absorption frequency. The distribution of the power loss indicates that the absorber is an excellent electromagnetic wave collector: the wave is first trapped and reinforced in certain specific locations, and then mostly consumed. The distribution of the surface current is consistent with the design, the retrieved impedance and the distribution of the power loss. This absorber may have applications in many scientific and technological areas.
顾超屈绍波裴志斌徐卓
共1页<1>
聚类工具0