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Antennas and Propagation, Transactions of the IRE Professional Group on

Volume 2: 1952

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Displaying Results 1 - 14 of 14
  • The lower E and D regions of the ionosphere as deduced from long wave measurements

    Publication Year: 1952 , Page(s): 63
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1659 KB)  

    A diurnal and seasonal model representing the E and D regions of the ionosphere above State College, Pennsylvania is presented. This model consists of a Chapman-like E-region and an electron D-region. Approximate 150-kc wave solutions including coupling are obtained for this model. These wave solutions, of course, exhibit the well known reflection condition corresponding to an N value of around 3,... View full abstract»

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  • On the question of the magnitude of the lunar variation in radio field strength

    Publication Year: 1952 , Page(s): 62
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1728 KB)  

    Eight years of continuous recordings of the field strength of station WIW, and nine years of recordings of station W8XAL, both located near Cincinnati, Ohio, were examined for a lunar variation. The recordings were made at Washington, D.C. approximately 600 km away. The transmitted frequencies were 700 and 6,080 kc, respectively. In the case of WIW, nighttime values of hourly median field strength... View full abstract»

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  • A study of winds in the ionosphere by radio methods

    Publication Year: 1952 , Page(s): 62
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1728 KB)  

    Winds in the ionosphere have been studied by a method due to S.N. Mitra using the fading of radio echoes at spaced receivers (Proc. IEE, London, 111, 43, p. 441; 1949). A mean daily wind variation of nearly. semi-diurnal period and about 40 meters per second amplitude has been observed at à nominal height of 110 km (Region E), The wind variation is consistent with the explanation that it is due t... View full abstract»

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  • The effect of sporadic e on television reception

    Publication Year: 1952 , Page(s): 54 - 61
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3012 KB)  

    For several years now reports of long distance reception have been coming in from, television viewers. Host frequently these receptions have spanned distances of around 1,000 miles. There has been considerable speculation as to whether these anomalous receptions were tropospheric in origin or transmitted via the sporadic-E region of the ionosphere. A consideration is made here of the type of evide... View full abstract»

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  • Radio wave propagation over long distances at 100 kc

    Publication Year: 1952 , Page(s): 40 - 53
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3361 KB)  

    With the assignment of the 90¿100-kc band to long-distance navigation systems, the interest in obtaining fairly precise propagation information for these frequencies has rapidly increased. Because of the lack of a suitable method of computing the level of received composite signal at various distances from a. transmitter, it was decided to obtain this information experimentally. View full abstract»

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  • The dielectric properties of ice and snow at 3.2 centimetres as related to the reflection coefficient of snow-covered surfaces

    Publication Year: 1952 , Page(s): 39
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1732 KB)  

    A study has been made of the reflecting properties of snow- and ice-covered surfaces at a wavelength of 3.2 centimeters. In making this study, two lines of investigation have been followed. In one, controlled laboratory measurements were made of the permittivity and loss tangent of ice and snow of varying density and crystal structure over the temperature range 0?? to ??20?? C, using waveguide tec... View full abstract»

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  • Some characteristics of tropospheric scattering

    Publication Year: 1952 , Page(s): 37 - 38
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2027 KB)  

    Three problems are considered in this paper viiieh are important in determining the effect of scattering on distant radio fields. The first problen is the attenuation of radio signals caused by scatterin1. Booker and Gordon2 supposed secondary scattering to be negligible, and proceeded to develop the general equation for scattering without including this component. This paper shows their assumptio... View full abstract»

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  • Refraction of radio waves in arbitrary atmosphere-ray-tracing picture

    Publication Year: 1952 , Page(s): 36
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (105 KB)  

    A development following Hartree, etc., is carried out of ray tracing using REAC differential analyzer. Ray families, on 2k-inch by 32-inch paper, are obtained for an atmosphere with a single n profile (index of refraction versus altitude curve), and for an atmosphere with three n profiles over the region of interest. The n profiles used were measured up to 10,000-foot altitude. The variation in ra... View full abstract»

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  • Field strengths recorded on adjacent FM channels at 93 mc over distances from 40 to 150 miles

    Publication Year: 1952 , Page(s): 35
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (141 KB)  

    Field strengths of KE2XCC (93.1 mc, Alpine, N.J.) and WBZ-FM (92.9 mc, Boston, Mass.) have been recorded for more than a year at two locations (Hauppauge and Riverhead) on Long Island. The distances from Alpine to the receivers were 40.5 and 67.2 miles, while from Boston they were 150.4 and 127.4 miles. Statistical analysis of data for the evening hours reveals a broad seasonal trend toward higher... View full abstract»

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  • The effect of uniform layers on the propagation of radio waves

    Publication Year: 1952 , Page(s): 28 - 34
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2252 KB)  

    Almost everyone who has studied anomalous propagation in the troposphere will agree that the controlling factors are temperature and humidity profiles along the propagation path. However, when one tries to correlate propagation data against refractive index profiles as computed from temperature and humidity data, one immediately encounters the difficulty of a large scatter of points. In this case,... View full abstract»

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  • Internal reflection in the troposphere and propagation beyond the horizon

    Publication Year: 1952 , Page(s): 9 - 27
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3206 KB)  

    Since the last year of World War II, the outstanding problem in tropospheric propagation research has been the explanation of the high observed field, strengths well beyond the horizons of high-power transmitters, at all frequencies throughout the vhf and microwave spectrum, in widely separated parts of the world under vastly different conditions of climate and terrain' The disagreement between me... View full abstract»

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  • The role of partial reflections in tropospheric propagation beyond the horizon

    Publication Year: 1952 , Page(s): 2 - 8
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2485 KB)  

    Measurements on vhf transmissions in recent years have indicated that field strengths deep in the diffraction region are many orders of magnitude greater than values calculated on a smooth earth diffraction theory, even vii en allowance is made for the refraction produced by the standard atmosphere1 Of the theories advanced to date in explanation of this effect, the machanism of scattering by inho... View full abstract»

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  • [Blank page]

    Publication Year: 1952 , Page(s): 1
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    Freely Available from IEEE
  • [Front matter]

    Publication Year: 1952 , Page(s): 1 - 2
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    Freely Available from IEEE

Aims & Scope

This Transactions ceased publication in 1955. The current retited publication is IEEE Transactions on Antennas and Propagation.

Full Aims & Scope