Pub Date : 1986-06-08DOI: 10.1109/APS.1986.1149726
D. Bodnar, Y. Rahmat-Samii
{"title":"Lens feed concepts for electronically steerable mobile satellite array antennas","authors":"D. Bodnar, Y. Rahmat-Samii","doi":"10.1109/APS.1986.1149726","DOIUrl":"https://doi.org/10.1109/APS.1986.1149726","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128818551","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}
Pub Date : 1986-06-08DOI: 10.1109/APS.1986.1149754
S. Tun, N. Adatia
{"title":"Dual shaped offset reflector antenna for contoured beam coverage of Europe","authors":"S. Tun, N. Adatia","doi":"10.1109/APS.1986.1149754","DOIUrl":"https://doi.org/10.1109/APS.1986.1149754","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128831539","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}
Pub Date : 1986-06-08DOI: 10.1109/APS.1986.1149770
A. Prata, W. Rusch
{"title":"The gain-optimized offset-fed radial rib umbrella defector","authors":"A. Prata, W. Rusch","doi":"10.1109/APS.1986.1149770","DOIUrl":"https://doi.org/10.1109/APS.1986.1149770","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128845796","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}
Pub Date : 1986-06-08DOI: 10.1109/APS.1986.1149623
R. Brown, P. Clarricoats, H. Zhou
{"title":"Optimum shaping of radiation patterns from reflector antennas","authors":"R. Brown, P. Clarricoats, H. Zhou","doi":"10.1109/APS.1986.1149623","DOIUrl":"https://doi.org/10.1109/APS.1986.1149623","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125370362","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}
Pub Date : 1986-06-08DOI: 10.1109/APS.1986.1149675
J. Dahele, S. Tung, K. Lee
The antennas consist of two vertically stack@ printed circular discs separated by an air region which is seyeral times the substrate thickness. This is to be contrasted with the geometry of Dahele and Lee {3},i? which the airgap wid* is a fraction of the substrate thickness. The lower disc is fed near the edge by a coaxial probe while the coupling to the upper disc is electromagnetic. In the " n o d " configuration, upper disc has its patch uppermost and in the "inverted" coqfiguration,. the upper disc
{"title":"Normal and inverted configurations of the broadband electromagnetic-coupled microstrip antenna","authors":"J. Dahele, S. Tung, K. Lee","doi":"10.1109/APS.1986.1149675","DOIUrl":"https://doi.org/10.1109/APS.1986.1149675","url":null,"abstract":"The antennas consist of two vertically stack@ printed circular discs separated by an air region which is seyeral times the substrate thickness. This is to be contrasted with the geometry of Dahele and Lee {3},i? which the airgap wid* is a fraction of the substrate thickness. The lower disc is fed near the edge by a coaxial probe while the coupling to the upper disc is electromagnetic. In the \" n o d \" configuration, upper disc has its patch uppermost and in the \"inverted\" coqfiguration,. the upper disc","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"907 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123271135","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}
Pub Date : 1986-06-08DOI: 10.1109/APS.1986.1149653
M. Ishiguro, H. Tanaka, K. Morita, T. Takahashi, S. Hayashi, N. Kaifu, M. Masuda, H. Kondo
The Nobeyama 45m telescope[1, Fig.1] was designed for operation at millimeter wavelengths. The surface of the telescope consists of 600 panels, the mean accuracy of which is about60 mum rms. At initial setting of panels, laser ranging theodolite was used for surveying the surface. However, the surface accuracy of the main reflector has been limited by the measuring error in the method. To improve the accuracy in surveying the surface, an instrument based on radio holographic technique[2, 3] has been developed. Signals at 19.45GHz from the Japanese communications satellites CS-2a and 2b were used for the measurements. The radio holography using geostationary satellites has following advantages for achieving high accuracy. First, as the elevation angle of the telescope is almost constant, it is easier to reduce the influences of pointing errors and the gravitational deformations during the measurements. Second, signal to noise ratio is much higher than using astronomical radio sources.
{"title":"Improvement of the surface accuracy of the nobeyama 45m telescope using radio holographic metrology","authors":"M. Ishiguro, H. Tanaka, K. Morita, T. Takahashi, S. Hayashi, N. Kaifu, M. Masuda, H. Kondo","doi":"10.1109/APS.1986.1149653","DOIUrl":"https://doi.org/10.1109/APS.1986.1149653","url":null,"abstract":"The Nobeyama 45m telescope[1, Fig.1] was designed for operation at millimeter wavelengths. The surface of the telescope consists of 600 panels, the mean accuracy of which is about60 mum rms. At initial setting of panels, laser ranging theodolite was used for surveying the surface. However, the surface accuracy of the main reflector has been limited by the measuring error in the method. To improve the accuracy in surveying the surface, an instrument based on radio holographic technique[2, 3] has been developed. Signals at 19.45GHz from the Japanese communications satellites CS-2a and 2b were used for the measurements. The radio holography using geostationary satellites has following advantages for achieving high accuracy. First, as the elevation angle of the telescope is almost constant, it is easier to reduce the influences of pointing errors and the gravitational deformations during the measurements. Second, signal to noise ratio is much higher than using astronomical radio sources.","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121136346","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}
Pub Date : 1986-06-08DOI: 10.1109/APS.1986.1149696
R. Pantoja, R. Sapienza, F. Filho
{"title":"Analysis of a wideband microwave log-periodic antenna feeding technique","authors":"R. Pantoja, R. Sapienza, F. Filho","doi":"10.1109/APS.1986.1149696","DOIUrl":"https://doi.org/10.1109/APS.1986.1149696","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116628474","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}
Pub Date : 1986-06-08DOI: 10.1109/APS.1986.1149687
A. Kas
{"title":"A design tool for multi-layered frequency selective surfaces composed of arbitrary elements","authors":"A. Kas","doi":"10.1109/APS.1986.1149687","DOIUrl":"https://doi.org/10.1109/APS.1986.1149687","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131117661","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}
Pub Date : 1986-06-08DOI: 10.1109/APS.1986.1149619
D. Cohoon
{"title":"Electromagnetic scattering in three and seven dimensional space - The equivalency of integral equation and Maxwell equation formulations of scattering problems with applications","authors":"D. Cohoon","doi":"10.1109/APS.1986.1149619","DOIUrl":"https://doi.org/10.1109/APS.1986.1149619","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127684580","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}
Pub Date : 1986-06-08DOI: 10.1109/APS.1986.1149814
H. Bach, H. Viskum
{"title":"Shortcomings of cross polarisation prediction methods for reflector antennas","authors":"H. Bach, H. Viskum","doi":"10.1109/APS.1986.1149814","DOIUrl":"https://doi.org/10.1109/APS.1986.1149814","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133468717","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}
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