Notification:
We are currently experiencing intermittent issues impacting performance. We apologize for the inconvenience.
By Topic

Antennas and Propagation, IRE Transactions on

Issue 4 • Date October 1955

Filter Results

Displaying Results 1 - 20 of 20
  • [Front cover and table of contents]

    Publication Year: 1955 , Page(s): 0
    Save to Project icon | Request Permissions | PDF file iconPDF (117 KB)  
    Freely Available from IEEE
  • News and views

    Publication Year: 1955 , Page(s): 161 - 162
    Save to Project icon | Request Permissions | PDF file iconPDF (166 KB)  
    Freely Available from IEEE
  • Prediction of oceanic duct propagation from climatological data

    Publication Year: 1955 , Page(s): 163 - 167
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (345 KB)  

    Techniques are described for predicting the effect of the "oceanic duct" in increasing the coverage of low-sited microwave radars. Prediction is made on a monthly basis using statistical data on sea temperature, air temperature, humidity, and wind speed. A large area in the northwest Pacific is used to illustrate the methods used. The basic prediction approach is to deduce refractive index profiles from available data parameters and to use Schelkunoff's ducting criteria to predict radar propagation effects. Monthly contours are then drawn over the area for each radar band showing the probability of extended coverage. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The curved passive reflector

    Publication Year: 1955 , Page(s): 168 - 173
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (515 KB)  

    The curved passive reflector is analyzed theoretically by the aperture-field method and the results are presented in the form of gain characteristics and radiation patterns. It is seen that curving the reflector produces a focusing effect in addition to the basic diffraction phenomenon, thereby providing increased gain as compared with the flat reflector. The limiting value for the flat reflector gain is 6 db while the gain of the curved reflector increases continually with reflector size when properly illuminated. Radiation patterns are computed and it is shown that the effect of reducing tower height is to widen the main lobe and to move the side lobes outward and depress them. It is concluded that, in general, the curved reflector causes lower side lobes than the flat reflector. The dish illumination is shown to be relatively unimportant with respect to the total antenna gain but the side lobe levels are reduced when the dish illumination is made more uniform. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A multiple telemetering antenna system for supersonic aircraft

    Publication Year: 1955 , Page(s): 173 - 176
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (406 KB)  

    The existing angle-of-attack indicator spike and ram-pressure tubes on a high-speed aircraft are modified to permit their use as telemetering antenna elements. The antenna system utilizing these elements provides for operation of three airborne telemetering transmitters. Operation of each transmitter and its antenna is independent of damage to or malfunction of the other components in the system, and no multiplexing loss is suffered in the antenna system. Since current flow on the fuselage is limited to the vicinity of the antenna elements, antenna performance would be little affected by variations in configuration of aircraft with similar basic design, and direct adaptation of this system to other aircraft of this type, therefore, is relatively straightforward. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Measurement of electric field distributions

    Publication Year: 1955 , Page(s): 177 - 180
    Cited by:  Papers (30)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (391 KB)  

    The usual method of measuring electric field distributions comprises a receiving antenna at the point of observation, connected by means of a transmission line to receiving apparatus at some distant point. The principal advantage of the method described here is that it eliminates the transmission line and thus makes possible many measurements which cannot be done by the usual method. It is based on the fact that the echo from a thin straight conducting wire is proportional to the square of the component of electric field parallel to the wire. The practical application at centimeter wavelengths is described. The method has proven most valuable in a variety of problems involving flush mounted directional antennas, radomes, artificial transmission lines, etc. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Determining the reflector surface of a radar antenna with point source feed

    Publication Year: 1955 , Page(s): 180 - 184
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (414 KB)  

    In the construction of a radar antenna the basic problem is to give the antenna reflector such a design that the scattering pattern will conform to the required power distribution. An approximative method is given for the determining of the central section of a reflector with point source feed and enveloping the osculating paraboloids, as well as a formula for the computation of the beam reflected by this surface. The central section obtained may be improved successively until adequate accuracy is attained. The method of computation is illustrated by an example. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Multipath phase errors in CW-FM tracking systems

    Publication Year: 1955 , Page(s): 185 - 192
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (668 KB)  

    High-precision, cw, missile-tracking systems are subject to multipath errors due to ground reflections and reflections from neighboring objects. To reduce the effects of ground reflection, advantage may be taken of the characteristic of frequency modulation to discriminate against a weaker interfering signal. This paper discusses the magnitude of the phase error reduction to be obtained by use of frequency modulation. It is demonstrated that the phase error can be reduced to any desired value if sufficient band width is utilized in the frequency modulation signal and significant improvement over an amplitude modulation system can be obtained with a wide-band FM system. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Application of the reaction concept to scattering problems

    Publication Year: 1955 , Page(s): 193 - 199
    Cited by:  Papers (14)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (618 KB)  

    Rumsey's "reaction concept" is applied to scattering problems by considering volume polarization currents which generate the scattered field. The scattering cross section is discussed. Approximation formulas are developed and illustrated by calculations for the echo width of a circular cylinder as a function of dielectric constant. Calculations are made for four plane-wave type trial fields in the cylinder; these are compared with the exact solution and with integral equation solutions through the second order. In this case the reaction method gives better results than the integral equation method, for the same amount of labor. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Radiation patterns of slotted-elliptic cylinder antennas

    Publication Year: 1955 , Page(s): 200 - 203
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (486 KB)  

    An expression is developed for the radiation pattern of an array of thin axiaI slots arbitrarily disposed around the circumference of an elliptic cylinder. Calculated azimuthal patterns are presented for single slots on elliptic cylinders of vanishing thickness. The results can be applied to approximate the pattern of practical cylinders having very thin cross sections. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The transmission-line properties of a round wire between parallel planes

    Publication Year: 1955 , Page(s): 203 - 207
    Cited by:  Papers (12)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (539 KB)  

    A transmission line is useful as a primary standard of impedance if there is a formula relating its wave resistance to its cross sectional shape. For this purposes the round wire between parallel planes is computed to a very close approximation. The method is based on dividing the usual single pole into a pair of spaced half-poles, between parallel lines on the plane of cross section. The resulting fomula covers all shape ratios to a high degree of approximation. Simple explicit formulas are given for the shape ratio and the wave resistance, each in terms of the others sufficiently close for practical purposes. For examples a line made of perfect conductors (assumed) and air dielectric (laboratory conditions), has a wave resistance of 50.000\pm.003 ohms if the ratio of radii is 0.54850 =1/1.82315. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Current distribution on wing-cap and tail-cap antennas

    Publication Year: 1955 , Page(s): 207 - 212
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (503 KB)  

    Surface current distributions on aircraft are examined for wing-cap and tail-cap antennas in the hf band using scale models. Current paths involved in structural resonances are investigated, and the effect of such resonances on antenna impedance is discussed. Measured results are also applied to the interpretation of radiation patterns. A technique is described for measuring the relative amplitude and phase of the surface current, and for determining the direction of current flow. In this method the detector is placed in the model and the probe is driven by an external source of rf power. This technique permits the frequency to be changed easily. The system is more sensitive than others described in the literature, since a higher power source can be used when it is not required to be enclosed in the aircraft model. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Note on a method for calculating coupling coefficients of elements in antenna arays

    Publication Year: 1955 , Page(s): 213 - 214
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (168 KB)  

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On-axis defocus characteristics of the paraboloidal reflector

    Publication Year: 1955 , Page(s): 214 - 216
    Cited by:  Papers (11)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (280 KB)  

    Lack of an adequate test site often requires the use of on-axis defocusing to obtain simulated Fraunhofer radiation patterns in the optical-Fresnel region from microwave reflector-type antennas. This note presents a way of determining the required amount of defocus from the viewpoint of aperture phase correction. It is shown that the important part of the main lobe of the radiation pattern can be approximately reproduced in the optical-Fresnel region with proper amount of defocus. For a given amplitude illumination function, the change in beamwidth with the position of the primary source can also be predicted. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Available bandwidth in 200-mile VHF tropospheric propagation

    Publication Year: 1955 , Page(s): 217 - 218
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (284 KB)  

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Bibliography of nonuniform transmission lines

    Publication Year: 1955 , Page(s): 218 - 220
    Cited by:  Papers (17)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (458 KB)  

    The literature on nonuniform transmission lines has grown slowly but steadily since original papers by Heaviside appeared at the close of the nineteenth century. (Heaviside's contributions have been almost completely overlooked by later writers.) The number of papers, although not overwhelming, is now large enough to warrant preparation of a bibliography. References to periodicals are in Part I, to texts in Part II, and to a selected group on horn theory in Part III. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Microwave optics part I - Report on microwave optics

    Publication Year: 1955 , Page(s): 220 - 221
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (239 KB)  

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Part II - Diffraction problems of microwave optics

    Publication Year: 1955 , Page(s): 222 - 228
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (763 KB)  

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Part III - Recent researches on the foundations of geometric optics and related investigations in electro-magnetic theory

    Publication Year: 1955 , Page(s): 228 - 232
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (500 KB)  

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • [Back cover]

    Publication Year: 1955 , Page(s): c4
    Save to Project icon | Request Permissions | PDF file iconPDF (282 KB)  
    Freely Available from IEEE

Aims & Scope

The Transactions ceased publication in 1962. The current retitled publication is IEEE Transactions on Antennas and Propagation.

Full Aims & Scope