Scheduled System Maintenance
On Tuesday, May 22, IEEE Xplore will undergo scheduled maintenance. Single article sales and account management will be unavailable
from 6:00am–5:00pm ET. There may be intermittent impact on performance from noon–6:00pm ET.
We apologize for the inconvenience.

IEEE Transactions on Antennas and Propagation

Volume 18 Issue 6 • November 1970

Filter Results

Displaying Results 1 - 25 of 36
  • [Front cover and table of contents]

    Publication Year: 1970, Page(s): 0
    Request permission for commercial reuse | PDF file iconPDF (264 KB)
    Freely Available from IEEE
  • The phase center of horn antennas

    Publication Year: 1970, Page(s):753 - 760
    Cited by:  Papers (54)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    The calculation of phase centers for rectangular and diagonal horns is presented. The calculation is based on a vector approach, by deriving the phase center from the expressions for the far field. Different expressions are derived for the phase center of theEandHplanes. The phase center for an arbitrary plane is calculated from theE-andH-plane phase cen... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Analysis of zigzag antennas

    Publication Year: 1970, Page(s):760 - 764
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    The integral equation technique is used to find rigorous solutions of the current distributions on zigzag antennas. Through a new decomposition technique the currents are analytically separated into forward and reflected components, from which accuratek - betadiagrams of the structures can be obtained. For the case of log-periodic antennas, the forward component of the current also give... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Experimental investigation of the broad-band properties of a continuously loaded resistive monopole

    Publication Year: 1970, Page(s):764 - 768
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (449 KB)

    A resistive monopole was designed using thin-film evaporation techniques. Measurements of radiation patterns were made over a 100:1 frequency band and compared to the theory of Wu and King. Current amplitude measurements exhibited a more rapid fall-off at the higher frequencies than the almost linear decay observed at the low frequencies. The input admittance was found to have a relatively gradual... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Wide-frequency-band radar array antenna system with suppressed grating lobes

    Publication Year: 1970, Page(s):774 - 779
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (658 KB)

    When array antennas are used for wide-frequency operation a difficulty with grating lobes is encountered at the upper frequency end of the operating band. This paper points out that the use of arrays for transmission and reception with different interelement spacings can be used to extend the operating frequency band in a radar system. The principle of transmitting-receiving arrays with different ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Terrain backscatter measurements at 40 to 90 GHz

    Publication Year: 1970, Page(s):780 - 784
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (454 KB)

    Experimental measurements were made under controlled laboratory conditions to determine terrain backscatter in the 40- to 90-GHz frequency range. Terrain samples in a dry and wet condition included asphalt, concrete, gravel, wood, sod, and tall weeds. Smooth and rough water were also included. Thebar{sigma}_{0}was established for angles of incidence from normal to45degwith th... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Circularly polarized phased array antenna element

    Publication Year: 1970, Page(s):804 - 807
    Cited by:  Papers (15)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    A phased array antenna element which provides good circular polarization over a broad sector of coverage in an array environment has been designed and evaluated. The concept is the superposition of complementary antennas, the dipole, and the slot, to achieve equalE- andH-plane patterns in the array environment. This element, when evaluated in a large test array, demonstrated ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On cylindrical wave functions in media with power law variation in permittivity

    Publication Year: 1970, Page(s):838 - 840
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    When the permittivity of a dielectric medium has a general power-law dependenceepsilon(rho) = epsilon(rho0)(rho/rho0)^{P}in circularly cylindrical coordinates, the solution takes on a different form, depending on whether or notp = -2. This communication is addressed to the problem of showing that the two forms are, in fact, equivalent asp rightarrow -2. The equival... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Comments on "Antenna aperture size effect on tropospheric phase noise"

    Publication Year: 1970, Page(s): 842
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (90 KB)

    See abstr. B3108 of 1967 View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • IEEE standards report on measuring field strength in radio wave propagation

    Publication Year: 1970, Page(s):846 - 869
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2323 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: 1970, Page(s): c4
    Request permission for commercial reuse | PDF file iconPDF (1848 KB)
    Freely Available from IEEE
  • Butler network extension to any number of antenna ports

    Publication Year: 1970, Page(s):818 - 820
    Cited by:  Papers (4)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    The addition of particular hybrid junctions to a conventional Butler network can increase the number of antenna ports from an integral power of 2 to any number. The resulting extended network produces greater flexibility in the relationship between the number of simultaneous beams and the radiation pattern. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Reflection-lobe dispersion in a phased-array antenna

    Publication Year: 1970, Page(s):802 - 804
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (296 KB)

    Reflection lobes in phase-scanned arrays with traveling-wave feeds can significantly degrade sidelobe levels. These lobes can be dispersed if the regularity of the feed system can be destroyed. In this communication, an aperture phase distribution is described that provides the maximum reflection-lobe dispersion for an arbitrary reasonably smooth amplitude distribution. This phase distribution is ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Multiple ground reflection effects on fading behavior of VHF/UHF satellite transmissions

    Publication Year: 1970, Page(s):836 - 838
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    A computerized method to predict fading occurrence in VHF/UHF satellite transmissions, originating from multiple ground reflections is described. Based on ray optics the effective antenna gain is computed as a function of the elevation angle and ground parameters of unidealized irregular terrain. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Scattering properties and mutual coupling of antennas with prescribed radiation pattern

    Publication Year: 1970, Page(s):741 - 752
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1056 KB)

    An analysis is presented of the interrelations among the radiative, scattering, and coupling properties of arbitrary lossless antennas. The analysis is based on a well-known scattering representation of antennas in terms of spherical modes in free space. This scattering representation is given a network interpretation which brings into focus the degree of interdependence between scattering and rad... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Radiation fields of open-cavity radiators and a backfire antenna

    Publication Year: 1970, Page(s):813 - 815
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    The radiation fields of an open-cavity radiator are studied theoretically and experimentally. This antenna consists of a simple open-ended circular cavity with a primary radiator, which includes a dipole, a dipole array, a terminated transmission line, and a loop, placed at an appropriate location inside the cavity. For the case of the dipole array exciter, because of the presence of a parasitic r... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Dielectric and loss properties of the Antarctic terrain: Their influence on the propagation constants of VLF modes in the earth-ionosphere waveguide

    Publication Year: 1970, Page(s):840 - 842
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    New information regarding the complex permittivity and depth of the ice sheet near Byrd Station, Antarctica, and of the conductivity of the underlying rock has permitted recalculation of the attenuation and phase constants relevant to horizontally polarized very-low-frequency energy propagating over long ice-covered paths in the earth-ionosphere waveguide; improvement in the predicted axial attenu... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The transient response of the coaxial cone antenna

    Publication Year: 1970, Page(s):799 - 802
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    A coaxial cone antenna whose aperture is in the plane of a ground plane has been described theoretically and experimentally in the time domain. Its response to an incident step along the ground plane is essentially a pulse whose width is equal to the diameter of the outer conductor at the aperture. Limitations on the cone dimensions are also discussed. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Resistance of a plane grid condenser moving through a plasma

    Publication Year: 1970, Page(s):834 - 836
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    The resistance of a plane grid condenser, moving in a magnetized plasma, is calculated using the quasi-hydrodynamic approximation for the plasma dielectric tensor. It is shown that, as a consequence of the anomalous Doppler effect, the resistance may become negative. Some implications for antenna measurements in the ionosphere are discussed. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Evaluation of the mean-squared error for optimum line source patterns

    Publication Year: 1970, Page(s):808 - 809
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    An expression for the error, in the least mean-squared sense, between the desired pattern and the optimum line source approximation pattern is derived. It is shown that the previously used method of truncating the infinite series form for the error leads to highly inaccurate results. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Ray-diffraction method for handling complex incident fields

    Publication Year: 1970, Page(s):821 - 823
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    A ray-diffraction method is described which is applicable to diffraction problems where the incident field on a diffracting edge cannot be represented as a single incident ray but exhibits a more complex form. The complex incident field may be represented by a combination of simple rays; the diffraction of each ray may then be treated individually. The total diffracted field is the sum of these di... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Scattering cross section for two cylinders

    Publication Year: 1970, Page(s):823 - 825
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    Analytical expressions are derived for the total scattering cross section of two identical parallel nonoverlapping circular cylinders in the immediate neighborhood of each other. Results obtained for the limiting case of Rayleigh particles are compared with the corresponding results obtained with the Rayleigh-Gans approximation. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Holographic antennas

    Publication Year: 1970, Page(s):811 - 813
    Cited by:  Papers (29)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    The extension of holography to the microwave field, for the solution of problems such as antenna synthesis and construction of visible images of microwave illuminated objects, seems to be promising. In preliminary tests, the possibility of designing an antenna having any mean surface, any feeder, and any given radiation pattern by means of holographic technique, is shown. One of the practical prob... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Solution of Maxwell's equations for log-periodic dipole antennas

    Publication Year: 1970, Page(s):734 - 741
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB)

    A theory of the log-periodic dipole antenna, which is a solution of the antenna boundary-value problem, is presented here. The theory is derived from Maxwell's equations by solving the wave equation in cylindrical coordinates and satisfying all boundary conditions. The theory is not limited to the log-periodic dipole antenna, but can be easily modified and applied to other antenna configurations u... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A modified elevation angle of radiation from a monopole on ground screens

    Publication Year: 1970, Page(s):795 - 799
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    The radiation of a monopole on ground screens is formulated by the diffraction techniques which have accurately predicted many other antenna patterns. Measurements have been made in the quasi-far-zone to check our formulation. A modified elevation angle is derived to transform our measured data into true far-zone data. The usefulness and accuracy of the present techniques are demonstrated by the g... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

IEEE Transactions on Antennas and Propagation includes theoretical and experimental advances in antennas.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief                                             Danilo Erricolo