Proceedings of the Institute of Radio Engineers最新文献

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Radio Progress during 1937: Part III - Report by the Technical Committee on Radio Receivers 1937年的无线电进展:第三部分-无线电接收机技术委员会的报告
Proceedings of the Institute of Radio Engineers Pub Date : 1938-01-01 DOI: 10.1109/jrproc.1938.228123
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引用次数: 0
A High-Efficiency Grid-Modulated Amplifier 一种高效率电网调制放大器
Proceedings of the Institute of Radio Engineers Pub Date : 1938-01-01 DOI: 10.1109/jrproc.1938.228492
F. E. Terman, J. R. Woodyard
{"title":"A High-Efficiency Grid-Modulated Amplifier","authors":"F. E. Terman, J. R. Woodyard","doi":"10.1109/jrproc.1938.228492","DOIUrl":"https://doi.org/10.1109/jrproc.1938.228492","url":null,"abstract":"A method of applying impedance inversion to the grid-modulated amplifier is described. Two tubes are employed in the modulated stage with their plate circuits connected through the electrical equivalent of a quarter-wave transmission line, and the modulating voltage is applied to the grids in series with the grid bias. By this means, high efficiency and large power output per tube are obtained. Efficiences of 65 to 80 per cent are readily secured during both modulated and unmodulated intervals as compared with 60 to 65 per cent for the high-efficiency linear amplifier. The output per tube is also greater than that of the high-efficiency linear amplifier. Only a small amount of modulating power is required, and this system is particularly adaptable to negative feedback. The effect of the impedance-inverting network on modulated waves is discussed. A simplified method of adjusting the tuned circuits of the impedance inverter is described. Formulas are derived for output and efficiency for both the high-efficiency grid modulator and the high-efficiency linear amplifier.","PeriodicalId":54574,"journal":{"name":"Proceedings of the Institute of Radio Engineers","volume":"26 1","pages":"929-945"},"PeriodicalIF":0.0,"publicationDate":"1938-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/jrproc.1938.228492","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62307773","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: 6
Report of Committee on Radio Wave Propagation 无线电波传播委员会报告
Proceedings of the Institute of Radio Engineers Pub Date : 1938-01-01 DOI: 10.1109/jrproc.1938.228687
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引用次数: 1
The Ultra-Short-Wave Guide-Ray Beacon and Its Application 超短波导光信标及其应用
Proceedings of the Institute of Radio Engineers Pub Date : 1938-01-01 DOI: 10.1109/JRPROC.1938.228621
E. Kramar, W. Hahnemann
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引用次数: 1
Radio Progress during 1937: Part IV - Report by the Technical Committee on Television and Facsimile 1937年的无线电进展:第四部分——电视和传真技术委员会的报告
Proceedings of the Institute of Radio Engineers Pub Date : 1938-01-01 DOI: 10.1109/jrproc.1938.228124
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引用次数: 0
Characteristics of the Ionosphere at Washington, D.C., November, 1937 1937年11月,华盛顿特区电离层的特征
Proceedings of the Institute of Radio Engineers Pub Date : 1938-01-01 DOI: 10.1109/JRPROC.1938.228671
T. R. Gilliland, S. S. Kirby, N. Smith, S. E. Reymer
{"title":"Characteristics of the Ionosphere at Washington, D.C., November, 1937","authors":"T. R. Gilliland, S. S. Kirby, N. Smith, S. E. Reymer","doi":"10.1109/JRPROC.1938.228671","DOIUrl":"https://doi.org/10.1109/JRPROC.1938.228671","url":null,"abstract":"Data on the ordinary-wave critical frequencies and virtual heights of the ionospheric layers are presented for the period indicated in the title. The monthly average values of the maximum usable frequencies for undisturbed days, for radio transmission by way of the regular layers is also provided.","PeriodicalId":54574,"journal":{"name":"Proceedings of the Institute of Radio Engineers","volume":"26 1","pages":"112-114"},"PeriodicalIF":0.0,"publicationDate":"1938-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/JRPROC.1938.228671","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62308376","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
Booklets, catalogs and pamphlets received 收到小册子、目录及小册子
Proceedings of the Institute of Radio Engineers Pub Date : 1938-01-01 DOI: 10.1109/jrproc.1937.228995
{"title":"Booklets, catalogs and pamphlets received","authors":"","doi":"10.1109/jrproc.1937.228995","DOIUrl":"https://doi.org/10.1109/jrproc.1937.228995","url":null,"abstract":"Provides a list of recent commercial literature received by the Institute.","PeriodicalId":54574,"journal":{"name":"Proceedings of the Institute of Radio Engineers","volume":"26 1","pages":"1037-1037"},"PeriodicalIF":0.0,"publicationDate":"1938-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/jrproc.1937.228995","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62307192","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
Booklets, catalogs and pamphlets received 收到小册子、目录及小册子
Proceedings of the Institute of Radio Engineers Pub Date : 1938-01-01 DOI: 10.1109/jrproc.1938.228275
{"title":"Booklets, catalogs and pamphlets received","authors":"","doi":"10.1109/jrproc.1938.228275","DOIUrl":"https://doi.org/10.1109/jrproc.1938.228275","url":null,"abstract":"Provides a list of recent commercial literature received by the Institute.","PeriodicalId":54574,"journal":{"name":"Proceedings of the Institute of Radio Engineers","volume":"26 1","pages":"488-490"},"PeriodicalIF":0.0,"publicationDate":"1938-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/jrproc.1938.228275","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62307418","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
Time-Division Multiplex in Radiotelegraphic Practice 无线电报实务中的时分复用
Proceedings of the Institute of Radio Engineers Pub Date : 1938-01-01 DOI: 10.1109/JRPROC.1938.228610
J. L. Callahan, R. Mathes, A. Kahn
{"title":"Time-Division Multiplex in Radiotelegraphic Practice","authors":"J. L. Callahan, R. Mathes, A. Kahn","doi":"10.1109/JRPROC.1938.228610","DOIUrl":"https://doi.org/10.1109/JRPROC.1938.228610","url":null,"abstract":"The paper outlines certain methods of multiplexing telegraphic signals on a common communication channel and the factors governing the application of these methods to radio circuits. The recently developed trend toward the use of multiplex methods in radiotelegraphic service is discussed. Consideration is given to the advantages of using the time division method based on the baud, at least at the present state of the radio art. General specifications for the equipment are stated, based on practical operating requirements. Major changes from practices obtaining on wire-line multiplex systems are mentioned and the reasons therefor are given. A description of a practical system based on the above considerations and its use and effectiveness in a large radiotelegraph organization is furnished.","PeriodicalId":54574,"journal":{"name":"Proceedings of the Institute of Radio Engineers","volume":"26 1","pages":"55-75"},"PeriodicalIF":0.0,"publicationDate":"1938-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/JRPROC.1938.228610","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62308276","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: 4
The Basic Principles of Super-Regenerative Reception 超再生接收的基本原理
Proceedings of the Institute of Radio Engineers Pub Date : 1938-01-01 DOI: 10.1109/JRPROC.1938.228669
F.W. Frink
{"title":"The Basic Principles of Super-Regenerative Reception","authors":"F.W. Frink","doi":"10.1109/JRPROC.1938.228669","DOIUrl":"https://doi.org/10.1109/JRPROC.1938.228669","url":null,"abstract":"By means of cathode-ray oscillograms and mathematical analyses the principal phenomena occurring in superregenerative receivers are explained. The results verify an earlier theory that in the separately quenched detector the received signal merely causes the detector to oscillate at maximum output for a longer period during each quench cycle, without increasing the maximum amplitude of the oscillations. It is also shown that in the self-quenched detector the signal merely produces an increase in the quench frequency, without increasing the maximum amplitude reached by the oscillations. The sensitivity, selectivity, and characteristic noise of superregenerative receivers are discussed.","PeriodicalId":54574,"journal":{"name":"Proceedings of the Institute of Radio Engineers","volume":"31 1","pages":"76-106"},"PeriodicalIF":0.0,"publicationDate":"1938-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/JRPROC.1938.228669","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62308324","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: 29
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