Proceedings of the Institute of Radio Engineers最新文献_第8页

Direct Measurement of the Loss Conductance of Condensers at High Frequencies 高频电容器损耗电导的直接测量

Proceedings of the Institute of Radio Engineers Pub Date : 1938-04-01 DOI: 10.1109/JRPROC.1938.228310

M. Boella

引用次数: 0

Characteristics of the Ionosphere at Washington, D.C., February, 1938 华盛顿特区电离层的特征，1938年2月

Proceedings of the Institute of Radio Engineers Pub Date : 1938-04-01 DOI: 10.1109/JRPROC.1938.228311

T. R. Gilliland, S. S. Kirby, N. Smith

引用次数: 0

On Single and Coupled Tuned Circuits Having Constant Response-Band Characteristics 具有恒定响应带特性的单调谐和耦合调谐电路

Proceedings of the Institute of Radio Engineers Pub Date : 1938-04-01 DOI: 10.1109/JRPROC.1938.228197

H. Loh

引用次数: 1

Constants of Fixed Antennas on Aircraft 飞机固定天线常数

Proceedings of the Institute of Radio Engineers Pub Date : 1938-04-01 DOI: 10.1109/JRPROC.1938.228302

G. L. Haller

引用次数: 1

The Developmental Problems and Operating Characteristics of Two New Ultra-High-Frequency Triodes 两种新型超高频三极管的发展问题及工作特性

Proceedings of the Institute of Radio Engineers Pub Date : 1938-04-01 DOI: 10.1109/JRPROC.1938.228309

W.G. Wagener

{"title":"The Developmental Problems and Operating Characteristics of Two New Ultra-High-Frequency Triodes","authors":"W.G. Wagener","doi":"10.1109/JRPROC.1938.228309","DOIUrl":"https://doi.org/10.1109/JRPROC.1938.228309","url":null,"abstract":"Large values of power are difficult to obtain in the ultra-high-frequency region. At the limiting frequencies it is increasingly more difficult to find vacuum tubes that will deliver such power and perform efficiently. The principal factors that affect the design and performance of the tubes are those involving the electrical circuit, the size requirements for the power desired, and the transit time of the electrons within the evacuated space of the tube. The design principles that result from a consideration of these factors have been used in the development of two new ultra-high-frequency triodes. A triode capable of delivering approximately 700 watts at 100 megacycles is described. This tube, which is cooled by water and air, is capable of operation as a neutralized power amplifier up to 200 megacycles with an output of approximately 500 watts. A second triode is described which is a radiation-cooled glass tube with a 300-watt plate-dissipation rating. Normal efficiency is obtained up to 40 megacycles and operation as a neutralized power amplifier is possible up to 100 megacycles. The efficiency at 100 megacycles is approximately 60 per cent.","PeriodicalId":54574,"journal":{"name":"Proceedings of the Institute of Radio Engineers","volume":"26 1","pages":"401-414"},"PeriodicalIF":0.0,"publicationDate":"1938-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/JRPROC.1938.228309","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62307578","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

A Method of Neutralizing Hum and Feed-Back Caused by Variations in the Plate Supply 一种消除由极板供电变化引起的嗡嗡声和反馈的方法

Proceedings of the Institute of Radio Engineers Pub Date : 1938-04-01 DOI: 10.1109/JRPROC.1938.228131

K. Gonser

引用次数: 0

A Theory of Noise for Electron Multipliers 电子倍增器的噪声理论

Proceedings of the Institute of Radio Engineers Pub Date : 1938-03-01 DOI: 10.1109/JRPROC.1938.228127

W. Shockley, J. Pierce

引用次数: 113

A Method for the Investigation of Upper-Air Phenomena and Its Application to Radio Meteorography 高空现象的一种研究方法及其在无线电气象中的应用

Proceedings of the Institute of Radio Engineers Pub Date : 1938-03-01 DOI: 10.1109/JRPROC.1938.228688

H. Diamond, W. S. Hinman, F. W. Dunmore

{"title":"A Method for the Investigation of Upper-Air Phenomena and Its Application to Radio Meteorography","authors":"H. Diamond, W. S. Hinman, F. W. Dunmore","doi":"10.1109/JRPROC.1938.228688","DOIUrl":"https://doi.org/10.1109/JRPROC.1938.228688","url":null,"abstract":"Experimental work conducted for the United States Navy Department on the development of a radio meteorograph for sending down from unmanned balloons information on upper-air pressures, temperatures, and humidities, has led to radio methods applicable to the study of a large class of upper-air phenomena. The miniature transmitter sent aloft on the small balloon employs an ultra-high-frequency oscillator and a modulating oscillator; the frequency of the latter is controlled by resistors connected in its grid circuit. These may be ordinary resistors mechanically varied by instruments responding to the phenomena being investigated, or special devices, the electrical resistances of which vary with the phenomena. The modulation frequency is thus a measure of the phenomenon studied. Several phenomena may be measured successively, the corresponding resistors being switched into circuit in sequence by an air-pressure-driven switching unit. This unit also serves for indicating the balloon altitude. At the ground receiving station, a graphical frequency recorder, connected in the receiving-set output, provides an automatic chart of the variation of the phenomena with altitude. The availability of a modulated carrier wave during the complete ascent allows of tracking the balloon for determining its azimuthal direction and distance from the receiving station, data required in measuring the direction and velocity of winds in the upper air.","PeriodicalId":54574,"journal":{"name":"Proceedings of the Institute of Radio Engineers","volume":"26 1","pages":"1235-1265"},"PeriodicalIF":0.0,"publicationDate":"1938-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/JRPROC.1938.228688","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62308432","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

Excess-Energy Electrons and Electron Motion in High-Vacuum Tubes 高真空管中的超能电子和电子运动

Proceedings of the Institute of Radio Engineers Pub Date : 1938-03-01 DOI: 10.1109/JRPROC.1938.228120

E. Linder

引用次数: 17

A New Principle in Directional Antenna Design 定向天线设计的新原理

Proceedings of the Institute of Radio Engineers Pub Date : 1938-03-01 DOI: 10.1109/JRPROC.1938.228128

W. W. Hansen, J. R. Woodyard

{"title":"A New Principle in Directional Antenna Design","authors":"W. W. Hansen, J. R. Woodyard","doi":"10.1109/JRPROC.1938.228128","DOIUrl":"https://doi.org/10.1109/JRPROC.1938.228128","url":null,"abstract":"It is shown that in certain types of directional antenna arrays the gain can be increased by arranging so that waves going from the array elements in the direction of maximum transmission are not strictly in phase at large distances. Three examples are given, an end-fire array and two antennas designed to radiate, as far as possible, only in a horizontal plane. In the case of the end-fire array it is shown that readjustment of any existing antenna according to the ideas proposed here will increase the gain by about 1.8. The other two examples correspond to the kind of directivity generally desired in a broadcast antenna. One of these consists of short antennas placed in concentric rings. A typical array of this type containing 22 short antennas with the radius of the outer ring equal to 1.39λ has a gain of 2.31 as compared with 1.56 for a vertical half-wave antenna. The other example of a horizontally radiating array consists of a single ring of short antennas. An example of this type is calculated which has a gain of 2.0 with a total of 23 antennas placed in a circle with a radius of 1.43λ. These figures are not given as the best that can be done, but only as examples.","PeriodicalId":54574,"journal":{"name":"Proceedings of the Institute of Radio Engineers","volume":"58 1","pages":"333-345"},"PeriodicalIF":0.0,"publicationDate":"1938-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/JRPROC.1938.228128","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62307232","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: 181