IEEE Antennas and Propagation Society International Symposium 1997. Digest最新文献_第5页

Shaped reflector antenna configurations for generating a rotatable elliptical spot beam 用于产生可旋转椭圆点波束的形反射面天线结构

IEEE Antennas and Propagation Society International Symposium 1997. Digest Pub Date : 1997-07-13 DOI: 10.1109/APS.1997.631856

P. H. Law, D. Kresco, P. Ramanujam

引用次数: 1

Broadside radiating dielectric rod antennas with dielectric radiating elements 带有电介质辐射元件的宽边辐射电介质杆天线

IEEE Antennas and Propagation Society International Symposium 1997. Digest Pub Date : 1997-07-13 DOI: 10.1109/APS.1997.631738

J. Mahon

引用次数: 0

Analysis of cascaded asymmetric coplanar waveguide step discontinuities 级联非对称共面波导阶跃不连续分析

IEEE Antennas and Propagation Society International Symposium 1997. Digest Pub Date : 1997-07-13 DOI: 10.1109/APS.1997.625515

K. Rahman, C. Nguyen

引用次数: 1

Spherical-multipole analysis of scattering by finite and semi-infinite elliptic cones 有限和半无限椭圆锥散射的球-多极分析

IEEE Antennas and Propagation Society International Symposium 1997. Digest Pub Date : 1997-07-13 DOI: 10.1109/APS.1997.631723

S. Blume, L. Klinkenbusch

{"title":"Spherical-multipole analysis of scattering by finite and semi-infinite elliptic cones","authors":"S. Blume, L. Klinkenbusch","doi":"10.1109/APS.1997.631723","DOIUrl":"https://doi.org/10.1109/APS.1997.631723","url":null,"abstract":"The interest in scattering by elliptic cones is mainly motivated by the role which the diffraction coefficients play in asymptotic high frequency theories like the GTD (geometrical theory of diffraction) or the uniform theory of diffraction. Since the elliptic cone possesses a two-parametric tip, the pertinent field must contain the information of a very general tip diffraction coefficient (TDC). This TDC is obtained by analysis of the field scattered by a semi-infinite elliptic cone and is then validated by comparing the exact field scattered by a finite elliptic cone with the corresponding complete GTD-result (including the TDC). By applying the spherical-multipole technique the exact solutions for the scattering of EM waves by a finite as well as by a semi-infinite perfectly conducting elliptic cone are deduced. The vector problems are reduced to scalar problems. Products of spherical Bessel functions and so-called Lame products, the vector spherical-multipole functions can be derived, which form a complete base to construct any EM field outside the sources. The boundary-value problem for the finite elliptic cone is formulated as a standard two-domain problem. In each domain the EM field is described by an appropriate spherical multipole expansion, while the corresponding multipole amplitudes are found by enforcing the boundary- and continuity conditions of the field and by employing the orthogonality relations of the vector spherical-multipole functions. The problem of plane wave scattering by a semi-infinite elliptic cone is solved via the pertinent dyadic Green's function. Suitable sequence transformations are applied which enforce the convergence and yield the limiting value for these series.","PeriodicalId":283897,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1997. Digest","volume":"134 29","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132802503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High precision differentiation of FEM approximate solutions 有限元近似解的高精度微分

IEEE Antennas and Propagation Society International Symposium 1997. Digest Pub Date : 1997-07-13 DOI: 10.1109/APS.1997.631811

D. Omeragic

引用次数: 0

Extension of the Orchard-Elliott synthesis method to pure real non-symmetrical shaped patterns Orchard-Elliott综合方法在纯实非对称形图中的推广

IEEE Antennas and Propagation Society International Symposium 1997. Digest Pub Date : 1997-07-13 DOI: 10.1109/APS.1997.625420

E. Botha, F. Ares

引用次数: 3

Banded-matrix preconditioning for electric-field integral equations 电场积分方程的带矩阵预处理

IEEE Antennas and Propagation Society International Symposium 1997. Digest Pub Date : 1997-07-13 DOI: 10.1109/APS.1997.631610

A. Yaghjian

引用次数: 26

Fast ASAR image formation using the shooting and bouncing ray technique 使用射击和反射射线技术的快速ASAR图像形成

IEEE Antennas and Propagation Society International Symposium 1997. Digest Pub Date : 1997-07-13 DOI: 10.1109/APS.1997.625542

C. Ozdemir, R. Bhalla, H. Ling

{"title":"Fast ASAR image formation using the shooting and bouncing ray technique","authors":"C. Ozdemir, R. Bhalla, H. Ling","doi":"10.1109/APS.1997.625542","DOIUrl":"https://doi.org/10.1109/APS.1997.625542","url":null,"abstract":"We have recently devised a diagnostic algorithm for imaging antenna-platform interactions from antenna radiation data. The algorithm, termed ASAR (antenna synthetic aperture radar) imaging, utilizes multi-frequency, multi-aspect radiation data and Fourier processing to create a 3D map of the platform showing the locations of dominant secondary radiation on the platform. Such an algorithm can be used to process either measurement data or computed data from electromagnetic solvers. In this paper, we consider the case when the SBR (shooting and bouncing ray) approach is used to simulate the antenna radiation data. It is shown that a fast ASAR imaging algorithm especially tailored for the SBR approach can be derived. By taking advantage of the ray tracing information within the SBR engine, we will show that the ASAR image can be generated directly in the image domain without resorting to any multiple frequency-aspect calculations. Such an idea is similar to the image-domain ISAR formation process we have reported previously (1995). Furthermore, we can apply an FFT-based algorithm to speed up the ASAR image formation time. Using such a fast approach, it is possible to obtain the same quality of ASAR image as frequency-aspect approach at only a fraction of the computation time (minutes versus hours).","PeriodicalId":283897,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1997. Digest","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132137664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Optimization of a submillimeter wave hologram CATR 亚毫米波全息CATR的优化设计

IEEE Antennas and Propagation Society International Symposium 1997. Digest Pub Date : 1997-07-13 DOI: 10.1109/APS.1997.630105

J. Ala-Laurinaho, T. Hirvonen, A. Raisanen

引用次数: 7

Planar leaky-wave microstrip antenna 平面漏波微带天线

IEEE Antennas and Propagation Society International Symposium 1997. Digest Pub Date : 1997-07-13 DOI: 10.1109/APS.1997.631755

Choon Sae Lee, V. Nalbandian

引用次数: 11