排序方式: 共有45条查询结果,搜索用时 15 毫秒
1.
2.
宽带重叠微带贴片天线的分析与设计 总被引:1,自引:0,他引:1
分析和设计了一种宽频带微带贴片天线应用全波分析法(FWAM)研究表明,双层重叠微带贴片天线(SMDPA)具有比普通单贴片微带天线宽得多的带宽利用离散复镜像理论(DCIT)精确计算了所涉及的索末菲积分(SI),其速度比数值积分法(NIM)快数百倍通过改进SMDPA的馈电结构,使其带宽在s≤2时展宽至22%以上最后,设计了匹配网络,从而使其带宽在s≤15时达到约25% 相似文献
3.
4.
5.
徐晓文 《电子科技大学学报(自然科学版)》1989,(6)
对于用联合场积分方程法(CFIE)计算旋转对称涂层目标(CBOR)的散射面(RCS)时所涉及的主要元素做了进一步研究,导出了某些对称关系和奇偶特性,利用这些关系和特性简化了计算过程,从而大幅度提高了计算效率,使这种方法更加便于工程应用。 相似文献
6.
7.
给出了多层媒质中的水平和垂直电、磁偶极子谱域标量位和矢量位格林函数的一种新型表达通式 ,并通过理论验证了表达式的正确性 .该表达式除了形式上比较简单之外 ,还可以方便地提取准静态项 .更重要的是该表达式便于向空域转化 ,并可以利用离散镜像理论进行计算 .通过几种不同多层媒质结构的数值计算再次验证了所给出的多层媒质中位格林函数的正确性 . 相似文献
8.
Efficient PO-MOM Method for Analysis of the Radiation Characteristics of a Large Antenna-Radome System 总被引:1,自引:1,他引:0
An efficient hybrid method based on the method of moments(MOM)and physical optics(PO)for the analysis of radiation characteristics of an electrically large antenna-radome system is presented.Specifically,MOM is first applied to the antenna to find the current on its surface,and then the equivalent PO currents produced by the antenna radiation are assumed on the radome wall.When the coupling of the PO currents and antenna current is considered,the coupling matrix is divided into a series of partial matrices,in order to deduce the memory requirement and accelerate the evaluation process.Numerical results indicate that the proposed hybrid PO-MOM method is accurate and efficient. 相似文献
9.
10.
The characteristics of one kind of handset antenna are analyzed by the method of moments.By using the Pocklington equation and the Galerkin method,the current distribution on the handset antenna is calculated,the input impedance and radiation patterns are obtained.In addition,the characteristics of monopoles mounted on conducting chassis box with different sizes are analyzed.The results show that the size of the conducting chassis box has significant effect on the performance of the handset antenna.Therefore,appropriately changing the size of the conducting chassis box may improve the performance of the handset antenna. 相似文献