IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010)最新文献_第2页

Some developments in Fresnel zone plate lens antennas 菲涅耳带板透镜天线的一些进展

IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010) Pub Date : 1999-07-11 DOI: 10.1109/APS.1999.789417

H. Hristov

引用次数: 5

Modeling of lightning effects on simple structures and helicopter airframes using FDTD 用时域有限差分法模拟简单结构和直升机机体上的闪电效应

IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010) Pub Date : 1999-07-11 DOI: 10.1109/APS.1999.789210

G. Ballas, C. Balanis

{"title":"Modeling of lightning effects on simple structures and helicopter airframes using FDTD","authors":"G. Ballas, C. Balanis","doi":"10.1109/APS.1999.789210","DOIUrl":"https://doi.org/10.1109/APS.1999.789210","url":null,"abstract":"One critical problem that as aircraft may encounter during a flight is lightning. The effects of lightning can be roughly distinguished as direct and indirect. The direct effects are closely related to the points where the lightning arc enters and exits the aircraft. Examples of different effects include melting of the aircraft skin, puncture of nonconducting externally mounted parts and sparks in the fuel system. The indirect effects have to do with the magnetic and electric fields coupled to the interior of the aircraft. These can cause temporary upset or even permanent damage to the electronic equipment of the aircraft. The mechanisms through which this coupling can happen are resistive voltage drop on the airframe structure and through apertures, such as windows. Even with no apertures, the lightning current flowing in the metal wall of the airframe produces a non-zero magnetic field at the interior. This field together with the resistive voltage drop form the diffusion mechanism. In this paper the lightning current on a structure is modeled using FDTD. Then the diffusion mechanism is described for simple cylindrical structures and simulation results are shown. Finally, results on a Blackhawk helicopter structure excited with a lightning pulse are presented.","PeriodicalId":391546,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122598693","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: 1

Extensions of the single-integral-equation method 单积分方程法的推广

IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010) Pub Date : 1999-07-11 DOI: 10.1109/APS.1999.789549

E. Marx

引用次数: 0

Analysis of offset circular reflector antenna with a large aperture by complex source-dual series approach 大孔径偏置圆形反射天线的复源-对偶串联分析

IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010) Pub Date : 1999-07-11 DOI: 10.1109/APS.1999.789285

T. Oğuzer

引用次数: 0

An improved scattering analysis of arbitrary shaped cylinders in a focused beam system using Gabor representation 用Gabor表示改进的聚焦光束系统中任意形状圆柱体的散射分析

IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010) Pub Date : 1999-07-11 DOI: 10.1109/APS.1999.789259

R. Shavit

引用次数: 1

Optimization of the antenna-diversity-effectiveness of complex FM-car-antenna systems 复杂fm -汽车天线系统天线分集效率优化

IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010) Pub Date : 1999-07-11 DOI: 10.1109/APS.1999.788366

H. Lindenmeier, J. Hopf, L. Reiter, R. Kronberger

引用次数: 3

Error analysis for the truncation of multipole expansion of vector Green's functions 矢量格林函数多极展开截断的误差分析

IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010) Pub Date : 1999-07-11 DOI: 10.1109/7260.933781

Jiming Song, W. C. Chew

{"title":"Error analysis for the truncation of multipole expansion of vector Green's functions","authors":"Jiming Song, W. C. Chew","doi":"10.1109/7260.933781","DOIUrl":"https://doi.org/10.1109/7260.933781","url":null,"abstract":"The advent of fast algorithms in computational electromagnetics has permitted the solution of integral equations with an unprecedented number of unknowns. This is the consequence of the development of the fast multipole algorithms (FMA) and the multilevel fast multipole algorithms (MLFMA). Such algorithms allow a matrix-vector multiplication to be performed in O(NlogN) operations or less for many scattering problems. Moreover, the memory requirements of these methods are O(NlogN), or almost matrix free. Using the fast matrix-vector multiplications in an iterative solver, problems for integral equations involving millions of unknowns have been solved previously. One of the most important mathematical formulas in FMA is the addition theorem. In the numerical implementation of the addition theorem, the infinite series should be truncated. The error analysis for the truncation error in the scalar Green's functions has been done by many researchers. In this paper, the error analysis for the truncation error in the multipole expansion of vector Green's functions is given.","PeriodicalId":391546,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114286272","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: 81

Metallic zone plates for sectoral horns 扇形喇叭用金属带板

IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010) Pub Date : 1999-07-11 DOI: 10.1109/APS.1999.789418

D. Black, C. Nguyen

引用次数: 1

Methods of controlling the input impedance of a microstrip patch antenna 控制微带贴片天线输入阻抗的方法

IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010) Pub Date : 1999-07-11 DOI: 10.1109/APS.1999.789310

M. Chryssomallis, C. Christodoulou

引用次数: 2

Design of Q-band beam-waveguide system for the satellite communication Earth antenna 卫星通信地球天线q波段波束波导系统设计

IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010) Pub Date : 1999-07-11 DOI: 10.1109/APS.1999.789238

Taeho Son, Dong-Jin Lee, P. Uslenghi

引用次数: 1