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Electromagnetics at Washington State University 华盛顿州立大学的电磁学教授
IEEE Antennas and Propagation Society Newsletter Pub Date : 1989-10-01 DOI: 10.1109/MAP.1989.6102062
R. Olsen
{"title":"Electromagnetics at Washington State University","authors":"R. Olsen","doi":"10.1109/MAP.1989.6102062","DOIUrl":"https://doi.org/10.1109/MAP.1989.6102062","url":null,"abstract":"A question arises: Should the Given updating be written i OCCAM, to get an even faster code? A simple estimate shows that in he test program, about 40 million floating-point operations were performed in 58 sec on a single transputer. This is approximately 46% of the theoretical speed. In the case of the conjugate gradient method [8], 39% of the theoretical speed has been reached with OCCAM. This, and a comparison with the test of the floating-point operations (Table l), indicates that one will probably not get a faster code with OCCAM in our case.","PeriodicalId":377321,"journal":{"name":"IEEE Antennas and Propagation Society Newsletter","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128994756","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
Reviews and abstracts - Antenna theory and practice 综述与摘要-天线理论与实践
IEEE Antennas and Propagation Society Newsletter Pub Date : 1989-10-01 DOI: 10.1109/MAP.1989.6102065
D. Jackson
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引用次数: 0
Comments about time domain techniques in electromagnetics 电磁学中的时域技术评述
IEEE Antennas and Propagation Society Newsletter Pub Date : 1989-08-01 DOI: 10.1109/MAP.1989.6102029
F. Gardiol
{"title":"Comments about time domain techniques in electromagnetics","authors":"F. Gardiol","doi":"10.1109/MAP.1989.6102029","DOIUrl":"https://doi.org/10.1109/MAP.1989.6102029","url":null,"abstract":"Nowadays, electromagnetic wave propagation and scattering are studied directly in the time-domain, whereas previously one consldered sine-wave excitations and Fourier transformations into the frequencydomain. Time-domain approaches are certainly much closer to the physical reality, but how do they deal with propagation within (or with scattering from) material media, since material properties are dispersive (frequency-dependant), at least over parts of the frequency spectrum? It is not obvious that timedomain approaches can determine the resulting distortion of the signal.","PeriodicalId":377321,"journal":{"name":"IEEE Antennas and Propagation Society Newsletter","volume":"53 376 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126014264","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: 7
From "reaction concept" to "conjugate gradient": have we made any progress 从“反应概念”到“共轭梯度”，我们有什么进步吗
IEEE Antennas and Propagation Society Newsletter Pub Date : 1989-08-01 DOI: 10.1109/MAP.1989.6102022
T. Sarkar
{"title":"From \"reaction concept\" to \"conjugate gradient\": have we made any progress","authors":"T. Sarkar","doi":"10.1109/MAP.1989.6102022","DOIUrl":"https://doi.org/10.1109/MAP.1989.6102022","url":null,"abstract":"The objective of this paper is to trace the roots of development of various numerical techniques used in electromagnetics. The rates of convergence of each of the techniques is also outlined. Finally, we present the differences among the techniques from a purely numerical standpoint.","PeriodicalId":377321,"journal":{"name":"IEEE Antennas and Propagation Society Newsletter","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131398991","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: 12
Aspects of modem radar, edited by Eli Brookner 现代雷达方面，由Eli Brookner编辑
IEEE Antennas and Propagation Society Newsletter Pub Date : 1989-08-01 DOI: 10.1109/MAP.1989.6102026
A. Glisson
{"title":"Aspects of modem radar, edited by Eli Brookner","authors":"A. Glisson","doi":"10.1109/MAP.1989.6102026","DOIUrl":"https://doi.org/10.1109/MAP.1989.6102026","url":null,"abstract":"This book is a collection of nine chapters, written by different experts, describing many interesting topics of modern radar. When I was asked to review the book, I accepted the task with pleasure Having ersonally known the authors of the first two chapters for many years, and being aware of their strong and fruitful activity in the radar field, I expected to read a very good piece of work. Now that I have completed reading the whole book, I am even more convinced that a very ood service has been done for the radar community. A e Authors of the other seven chapters, and the readers of this review, will excuse me if I show some partiality: I cannot hide my friendship with Bob Hill and Eli Brookner. Nevertheless, I promise to tell the whole story of this outstanding book.","PeriodicalId":377321,"journal":{"name":"IEEE Antennas and Propagation Society Newsletter","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130717966","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
An historical perspective of microwave propagation and antenna research [From the Historian] 微波传播与天线研究的历史透视[来自历史学家]
IEEE Antennas and Propagation Society Newsletter Pub Date : 1989-06-01 DOI: 10.1109/MAP.1989.6102049
D. Hogg
{"title":"An historical perspective of microwave propagation and antenna research [From the Historian]","authors":"D. Hogg","doi":"10.1109/MAP.1989.6102049","DOIUrl":"https://doi.org/10.1109/MAP.1989.6102049","url":null,"abstract":"My first contact with the IEEE was in 1947 when, at the University of Western Ontario in London, Canada, under the guidance of Professor Garfield A. Woonton, I became a student member. In my college senior year (1949), my seminar topic was broadly titled, \"Radio Wave Propagation\": ground-wave, ionospheric, tropospheric - all were included! I was soon to learn that it was overwhelming to encompass such a broad field in detail. I think some of the inspiration for this interest in propagation came through J.A. Ratcliffe, whom I met briefly in England during the early (1941) radar years. He recently finished his days at Cambridge University.","PeriodicalId":377321,"journal":{"name":"IEEE Antennas and Propagation Society Newsletter","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127204516","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
Research on transmitting antennas 发射天线研究
IEEE Antennas and Propagation Society Newsletter Pub Date : 1989-06-01 DOI: 10.1109/MAP.1989.6102048
G. Sato, H. Kawakami
{"title":"Research on transmitting antennas","authors":"G. Sato, H. Kawakami","doi":"10.1109/MAP.1989.6102048","DOIUrl":"https://doi.org/10.1109/MAP.1989.6102048","url":null,"abstract":"All of the characteristics of the batwing radiator, which is the heart of the superturnstile antenna system, are theoretically calculated by using the moment method. The matching condition is obtained on the basis of the characteristics, for the cases of changing the connection of the jumper(s) and of changing the distance between the support mast and the antenna elements. In this paper, a comparative study of the results of theoretical analyses and actual measurements is conducted to determine whether or not the construction of the batwing antenna could be simplified by eliminating the element at its central part, without detracting from its favorable characteristics.","PeriodicalId":377321,"journal":{"name":"IEEE Antennas and Propagation Society Newsletter","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129105106","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
Spherical near-field antenna measurements, edited by J.E. Hansen 球形近场天线测量，由J.E.汉森编辑
IEEE Antennas and Propagation Society Newsletter Pub Date : 1989-06-01 DOI: 10.1109/MAP.1989.6102052
A. Glisson
{"title":"Spherical near-field antenna measurements, edited by J.E. Hansen","authors":"A. Glisson","doi":"10.1109/MAP.1989.6102052","DOIUrl":"https://doi.org/10.1109/MAP.1989.6102052","url":null,"abstract":"Near-Field Testing (NFT) methods have assumed an increasingly important role in modern antenna metrology (see the June 1988 special issue of the. IEEE Transactions on Antennas and Propagation). Although theoretically and practically complex, near-field measurements can provide unexcelled accuracy, and they can be performed in the compact, controlled environment of a standards laboratory.","PeriodicalId":377321,"journal":{"name":"IEEE Antennas and Propagation Society Newsletter","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125997168","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: 5
Understanding antennas for radar communications and avionics, by Benjamin Rulf and Gregory A. Robertshaw, Van Nostrand Reinhold 了解雷达通信和航空电子设备的天线，本杰明·鲁夫和格雷戈里·a·罗伯特肖，范·诺斯特兰德·莱因霍尔德著
IEEE Antennas and Propagation Society Newsletter Pub Date : 1989-04-01 DOI: 10.1109/MAP.1989.6095664
A. Glisson
{"title":"Understanding antennas for radar communications and avionics, by Benjamin Rulf and Gregory A. Robertshaw, Van Nostrand Reinhold","authors":"A. Glisson","doi":"10.1109/MAP.1989.6095664","DOIUrl":"https://doi.org/10.1109/MAP.1989.6095664","url":null,"abstract":"This book is an attempt to introduce electromagnetic applications to personnel with a non-electrical- engmeering background. The topics covered range from introduction of wave theory to different types of antennas. As the authors indicate, the objective of this book is not to confuse the non-specialist with detailed analysis, but to introduce him to the concepts of electromagnetics with regard to antenna applications. This book will certainly aid many electromagnetic specialists in tailoring courses for non-electromagnetic engineers. Specific topics in each of the 14 chapters are identified next.","PeriodicalId":377321,"journal":{"name":"IEEE Antennas and Propagation Society Newsletter","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126607528","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
Some notes on the history of Antenna development 1913 through 1917 [From the Historian] 关于1913年至1917年天线发展历史的一些注释[来自历史学家]
IEEE Antennas and Propagation Society Newsletter Pub Date : 1989-04-01 DOI: 10.1109/MAP.1989.6095662
H. Beverage
{"title":"Some notes on the history of Antenna development 1913 through 1917 [From the Historian]","authors":"H. Beverage","doi":"10.1109/MAP.1989.6095662","DOIUrl":"https://doi.org/10.1109/MAP.1989.6095662","url":null,"abstract":"[It is my pleasure to share a portion of the early history of radio described by a true pioneer in the field of antennas, Dr. Harold Beverage. The AP-S owes Dr. Bondyopadhyay a debt of gratitude for his dedication and help in obtaining this contribution. WFC]","PeriodicalId":377321,"journal":{"name":"IEEE Antennas and Propagation Society Newsletter","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124437500","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
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