By Topic

Antennas and Propagation, IEEE Transactions on

Issue 2 • Date March 1969

Filter Results

Displaying Results 1 - 25 of 40
  • [Front cover and table of contents]

    Publication Year: 1969 , Page(s): 0
    Save to Project icon | Request Permissions | PDF file iconPDF (290 KB)  
    Freely Available from IEEE
  • John T. Bolljahn award for 1967

    Publication Year: 1969 , Page(s): 118
    Save to Project icon | Request Permissions | PDF file iconPDF (87 KB)  
    Freely Available from IEEE
  • Special recognition awards

    Publication Year: 1969 , Page(s): 119
    Save to Project icon | Request Permissions | PDF file iconPDF (39 KB)  
    Freely Available from IEEE
  • Comments on "The distribution at formulation of Maxwell's equations

    Publication Year: 1969 , Page(s): 248
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (128 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: 1969 , Page(s): c4
    Save to Project icon | Request Permissions | PDF file iconPDF (625 KB)  
    Freely Available from IEEE
  • Surface currents induced on a wedge under plane wave illumination: An approximation

    Publication Year: 1969 , Page(s): 246 - 248
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (328 KB)  

    An approximate transform for the surface current induced on an infinite wedge is presented. The transform readily allows the investigation of the pulse response of a large class of cylindrical structures of general polygonal cross section. The results for the polarization of the excitation both parallel and normal to the axis of the infinite wedge are presented. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On mode conversion of VLF radio waves at a land-sea boundary

    Publication Year: 1969 , Page(s): 216 - 220
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (432 KB)  

    Propagation in the earth-ionosphere waveguide is considered for the situation where the earth's boundary has an abrupt change in the surface impedance. The formulation, which utilizes medal analysis, includes the effect of the usually ignored reflected modes. It is demonstrated, however, that these may be neglected in most practical situations even when the surface impedance contrast is large. The... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • High-frequency scattering from a conducting cylinder with an inhomogeneous plasma sheath

    Publication Year: 1969 , Page(s): 208 - 215
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (648 KB)  

    The high-frequency backscattering characteristics of an infinite conducting cylinder enveloped in a radially inhomogeneous plasma sheath are studied in detail. When the permittivity of the sheath has a general power-law dependence, \epsilon(\rho) = \epsilon(\rho_{0}) (\rho/\rho_{0})^{p} , where \rho_{0} is the outer ra... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Double-sheath helices: Leaky-wave antenna

    Publication Year: 1969 , Page(s): 138 - 145
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (632 KB)  

    A leaky-wave antenna whose radiation pattern is uniform in circumference is made of double-sheath helices. The fundamental characteristics of this antenna are discussed theoretically and experimentally. A method which produces a tapered field along its aperture to effect reduced sidelobe level, and the relationship between the dielectric supporter for the sheath helices and the wavenumber are also... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Scattering of a plane electromagnetic wave by a linear array of cylindrical elements

    Publication Year: 1969 , Page(s): 169 - 174
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (584 KB)  

    An approximate method for numerically calculating the scattered field of a linear array of center-loaded cylindrical elements illuminated by a plane wave incident in the H plane of the array is described. To illustrate the use of the approximation technique, the H -plane scattered field of an eight-element model array is cal... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Broadband characteristics of cylindrical antennas with exponentially tapered capacitive loading

    Publication Year: 1969 , Page(s): 145 - 151
    Cited by:  Papers (11)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (632 KB)  

    Experimental results are presented demonstrating the electrical characteristics of a cylindrical antenna loaded with capacitive elements whose reactance increases exponentially with the distance from the feed end. The results show that the antenna reported has good broadband characteristics. One of the antennas yielded radiation pattern constancy over a 3:1 bandwidth with VSWR varation of less tha... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Vertically polarized radar backscattering from the rear of a cone or cylinder

    Publication Year: 1969 , Page(s): 244 - 246
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (400 KB)  

    Previous work indicates that although accurate predictions are generally obtained from the geometrical theory of diffraction for cylinders and frustums, scattering from the rear edges of these bodies is sometimes poorly predicted. A new formulation provides satisfactory results for a cylinder, but conical bodies require further work. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Nonlinear microwave breakdown: A systems study

    Publication Year: 1969 , Page(s): 251 - 254
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (392 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.
  • Quality factor of general ideal antennas

    Publication Year: 1969 , Page(s): 151 - 155
    Cited by:  Papers (96)  |  Patents (9)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (432 KB)  

    An expression for the quality factor of an ideal antenna with both TE and TM modes excited is derived and applied to several special cases. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Radiation characteristics of a circumferential leaky-wave antenna on a conducting cylinder

    Publication Year: 1969 , Page(s): 125 - 131
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (608 KB)  

    The residue series representation of the fields for an azimuthal leaky-wave antenna on a conducting cylinder is studied. It is shown that the zeroth term corresponds to the case of an omnidirectional antenna, it being understood that omnidirectional refers to the azimuthal plane only. For each term of the residue series, it is shown that two regions exist for the radiation fields in the elevation ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Transients in dispersive media, part I: Theory

    Publication Year: 1969 , Page(s): 191 - 200
    Cited by:  Papers (13)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1080 KB)  

    The asymptotic evaluation of complex frequency integrals arising in the theory of radiation from transient sources in dispersive media is reviewed and extended to accommodate phenomena observed at distant observation points at any observation time. Helpful graphical methods are emphasized and illustrated for a plasma medium discussed in detail in Part II of this paper. Results are interpreted in t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Large 22-MHz array for radio astronomy

    Publication Year: 1969 , Page(s): 162 - 169
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (952 KB)  

    The relative merits of T- and cross-type radio telescopes are discussed. A large array used for radio astronomical studies at a frequency of 22.25 MHz ( \lambda = 13.5 m) is described. It is built in the form of a T with dimensions 96\lambda \times 2.5\lambda east-west and 32.5\lam...
							<a href= View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Array design for a specified pattern by matrix methods

    Publication Year: 1969 , Page(s): 237 - 239
    Cited by:  Papers (12)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (336 KB)  

    A new method is presented for designing arrays of parallel wire antennas. The method relates a desired pattern with required feed voltages such that mutual coupling is taken into account in the design procedure. The technique uses matrix methods together with results of the "Method of Moments" to determine the self- and mutual impedances and the required excitations. The design method can be appli... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A note on the antenna integral equation

    Publication Year: 1969 , Page(s): 223 - 224
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (248 KB)  

    An exact integral equation for a cylindrical antenna having a finite gap at the driving point is presented. By including the integrals of both the electric and magnetic currents flowing at the gap, the external current of the tubular antenna can be calculated separately from the internal current. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The admittance of infinite cylindrical antennas

    Publication Year: 1969 , Page(s): 234 - 235
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (240 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.
  • Magnetically driven yagi-uda array

    Publication Year: 1969 , Page(s): 226 - 229
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (408 KB)  

    A television array driven by a shorted section of transmission line is investigated theoretically and experimentally. The dipole elements are all parasitic and magnetically coupled to the driving line. Matching to practically any impedance is possible, radiation pattern and input impedance can be controlled independently, and design flexibility is gained. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Synthesis of an electromagnetic pulse generator

    Publication Year: 1969 , Page(s): 236 - 237
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (224 KB)  

    The cylindrical antenna, driven at its center by some transient voltage source and symmetrically loaded with lumped resistors, has been found to be a useful electromagnetic pulse generator. In this study a synthesis procedure was developed that yields the resistor values required to load the antenna so that, when an appropriate causal voltage source is applied to the center terminals of the antenn... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Excitation of a grounded dielectric slab by a horizontal dipole

    Publication Year: 1969 , Page(s): 156 - 161
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (448 KB)  

    The structure consisting of a horizontal electric dipole above a grounded dielectric slab is examined, primarily from the standpoint of power distribution among the two power-carrying wave components, i.e., surface and space waves. It is shown that surface wave propagation is always in the form of two distinct modes characterized by the same cutoff properties. Also, surface wave excitation efficie... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Analysis theory for the shaped-beam doubly curved reflector antenna

    Publication Year: 1969 , Page(s): 131 - 138
    Cited by:  Papers (13)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (560 KB)  

    An analysis theory of the shaped-beam doubly curved reflector antenna is described. The analysis computes the far-field patterns by calculating the current density distribution on the nonanalytic surface that the shaped-beam doubly curved reflector presents using the physical optics vector approximation. The presented theory utilizes a computer solution approach to achieve an accurate knowledge of... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Small-angle scattering by a finite cone

    Publication Year: 1969 , Page(s): 241 - 242
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (248 KB)  

    High-frequency scattering by a finite perfectly conducting right-circular cone is analyzed by modifying geometrical diffraction theory for application at and near nose-on aspects. Formulas appropriate for predicting principal-polarization radar cross sections as functions of frequency and aspect angle are presented. Calculations on a cone are in very good agreement with monostatic measurement data... 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                                                 Kwok W. Leung