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Antennas and Propagation, IEEE Transactions on

Issue 2 • Date February 1984

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Displaying Results 1 - 24 of 24
  • [Front cover and table of contents]

    Publication Year: 1984 , Page(s): 0
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    Freely Available from IEEE
  • Comments on "A new procedure for improving the solution stability and extending the frequency range of the EBCM"

    Publication Year: 1984 , Page(s): 209 - 210
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (202 KB)  

    First Page of the Article
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  • [Back cover]

    Publication Year: 1984 , Page(s): c4
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    Freely Available from IEEE
  • Transient response of coupled linear dipole antennas

    Publication Year: 1984 , Page(s): 133 - 140
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (544 KB)  

    Transient responses of coupled linear dipole antennas are measured for a basic understanding of coupling in the time domain. A very short pulse for excitation is used and it is shown that the measured data represent the quasi-impulse responses. For further investigation and comparison with the measured data, a simple formula of the impulse response of this configuration is derived by using the tra... View full abstract»

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  • Equivalent line current for cylindrical dipole antennas and its asymptotic behavior

    Publication Year: 1984 , Page(s): 200 - 204
    Cited by:  Papers (10)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (528 KB)  

    The concept of an equivalent line source for representing the current on a cylindrical dipole antenna is introduced. It is shown that the Fourier series coefficients of this equivalent line source are related to those of the actual antenna current by exponentially growing factors that grow rapidly for the higher order harmonics. This is used to explain why Hallén's integral equation using an ... View full abstract»

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  • Integral equation for scattering by a dielectric

    Publication Year: 1984 , Page(s): 166 - 172
    Cited by:  Papers (36)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (552 KB)  

    The determination of the scattered and transmitted transient electromagnetic waves produced by a uniform dielectric body is reduced to the solution of a singular integral equation of the first kind for one tangential vector field defined on the surface. All derivations are carried out within the heuristic approach to Green functions and delta functions. The electric and magnetic fields are express... View full abstract»

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  • Image buildup for the rectangular waveguide tensor Green's function

    Publication Year: 1984 , Page(s): 204 - 206
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (336 KB)  

    Tensor Green's functions, of both electric and magnetic type, are produced for the rectangular waveguide through summation of a doubly infinite series of free-space contributions obtained from endless imaging across (perfectly conducting) guide walls. The requisite summation is facilitated by resorting to a Fourier integral representation for the basic free-space kernel, followed by appeal to the ... View full abstract»

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  • Line-of-sight observations at 86 GHz with a very large and a small antenna

    Publication Year: 1984 , Page(s): 113 - 118
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (544 KB)  

    Amplitude variations over a 12.9 km terrestrial line-of-sight path were measured simultaneously on a 1400 \lambda and a 29 \lambda antenna at 86.16 GHz. Clear atmosphere data from two occasions with considerably different meteorological conditions are presented. Both sets have statistical and spectral parameters in goo... View full abstract»

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  • Effect of thunderstorm on microwave line-of-sight propagation

    Publication Year: 1984 , Page(s): 196 - 200
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (416 KB)  

    Thunderstorms frequently occur during the months of April and May over Calcutta. The behavior of microwave signal propagation during such storms has been studied, utilizing a terrestrial microwave line-of-sight link. Storm period is characterized by an increase in signal level with deep fluctuations. View full abstract»

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  • Exact image theory for the Sommerfeld half-space problem, part I: Vertical magnetic dipole

    Publication Year: 1984 , Page(s): 126 - 133
    Cited by:  Papers (34)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (768 KB)  

    Applying the Laplace transform, the exact distributed image current function is obtained for the classical Sommerfeld half-space problem with vertical magnetic current source. The resulting field integral is well behaved when the image current is situated in complex space. Unlike previous approximate images, the present theory is valid for any distance, height of the source, frequency, and half-sp... View full abstract»

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  • Suppression of reflections by directive probes in spherical near-field measurements

    Publication Year: 1984 , Page(s): 119 - 125
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (568 KB)  

    The influence of probe correction in spherical near-field measurements on signals from outside the test volume is investigated theoretically and experimentally. It is found that the suppression of reflections obtained by a directive probe is not disturbed by the probe correction. A geometric relation between the antenna "minimum sphere" and the probe pattern beamwidth is established, whose satisfa... View full abstract»

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  • Phase scanning of one-dimensional pattern

    Publication Year: 1984 , Page(s): 189 - 192
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (296 KB)  

    A method of determination of phase function required for scanning a one-dimensional pattern is presented. Analysis reveals that the one-dimensional pattern is produced in the meridian plane of a two-dimensional aperture by application of nonlinear phase in the directions along and parallel to this plane. Scanning is produced by application of a linear phase progression in the perpendicular directi... View full abstract»

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  • An alternative diffraction coefficient for the wedge

    Publication Year: 1984 , Page(s): 175 - 177
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (296 KB)  

    A geometrical theory of diffraction (GTD) interpretation of a uniform solution for the wedge given by Mohsen is given. The diffraction coefficients are equal to those given by Kouyoumjian and Pathak except that the Fresnel argument in the two solutions are different. This uniform geometrical theory of diffraction (UTD) result is compared with exact series expansions for a plane wave incident on a ... View full abstract»

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  • Low frequency radiation characteristics of a modulated electron beam immersed in a magnetized plasma

    Publication Year: 1984 , Page(s): 177 - 181
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (440 KB)  

    The possibility of using a modulated electron beam injected in a magnetized plasma as a low frequency antenna (frequency lower than the gyrofrequency) is explored. The physical mechanism proposed to insure this property is spontaneous coherent emission. Derivation of the power lost by the beam is done with emphasis on the particular conditions named "focalization condition" encountered in the whis... View full abstract»

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  • Bicollimated Gregorian reflector antenna

    Publication Year: 1984 , Page(s): 147 - 154
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (632 KB)  

    A bicollimated Gregorian reflector is structurally similar to a classical confocal Gregorian reflector, but its surfaces are shaped to have better scan capability. A geometrical optics procedure is used in designing the reflector surfaces. A three-dimensional ray tracing procedure is used in analyzing the aperture phase errors as the beam is scanned to different angles. The results show that the b... View full abstract»

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  • Dyadic Green's function in bounded media

    Publication Year: 1984 , Page(s): 193 - 196
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (368 KB)  

    A new theory for the evaluation of the dyadic Green's functions in a homogeneous medium bounded by perfectly conducting walls is presented. The peculiarities of this theory are 1) the Green's functions are systematically and explicitly decomposed in a singular and an analytical part, and 2) these two parts are formulated in a general manner, i.e., independent on the boundaries. As an application, ... View full abstract»

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  • Instantaneous diversity gain in 10-30 GHz satellite systems

    Publication Year: 1984 , Page(s): 206 - 208
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (336 KB)  

    As usually defined, diversity gain is a statistical measure which conveys little or no information about the instantaneous behavior of site-diversity reception in a satellite communications system. A new quantity called instantaneous diversity gain is introduced and some measurements of it from an 11.6 GHz low-angle two-site downlink are presented. It is shown how instantaneous diversity gain is r... View full abstract»

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  • Antenna synthesis and optimization using weighted Inagaki modes

    Publication Year: 1984 , Page(s): 159 - 165
    Cited by:  Papers (12)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (576 KB)  

    Inagaki modes represent a new modal formalism for problems of radiation and scattering from arbitrary discrete and continuous structures. These modes can be generalized to be orthogonal over any sector of the sphere at infinity, as well as the source region itself. Theory and application of these modes to problems of pattern synthesis and array optimization, including constraints, are presented. E... View full abstract»

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  • On the feasibility of using an atmospheric discharge plasma as an RF antenna

    Publication Year: 1984 , Page(s): 141 - 146
    Cited by:  Papers (12)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (792 KB)  

    The plasma produced by a laser-guided, electric discharge in the atmosphere has been formed in the shape of a folded monopole antenna with a characteristic frequency of 112 MHz. This plasma antenna has been used to transmit and receive signals at 112 MHz. While the plasma remained conducting, the signal transmitted from, and received on, the plasma antenna was within -1 View full abstract»

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  • An integral equation for electromagnetic scattering from homogeneous dielectric bodies

    Publication Year: 1984 , Page(s): 173 - 175
    Cited by:  Papers (43)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (312 KB)  

    A single surface integral equation for problems involving electromagnetic scattering from homogeneous dielectric bodies illuminated by time-harmonic sources is developed via the equivalence principle. The equation is formulated in terms of an equivalent electric current defined at the body surface. When allowed to radiate in a homogeneous medium having the material parameters of the exterior mediu... View full abstract»

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  • On the determination of the terminal impedances of a nonuniform transmission line

    Publication Year: 1984 , Page(s): 181 - 184
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (360 KB)  

    The problem of determining the terminal impedance values of a lossless nonuniform transmission line is addressed. The transmission line is assumed to have discontinuities at input and output with local reflection coefficients \Gamma _{1} and \Gamma _{2} , respectively. A set of formulas is given which allows View full abstract»

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  • Frequency dependence of rain attenuation measurements at microwave frequencies

    Publication Year: 1984 , Page(s): 185 - 187
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (304 KB)  

    The values of attenuation versus frequency for 10 mm/h, 25 mm/h, and 40 mm/h rain rates for frequencies of 11, 18, and 22.2 GHz are presented. On the basis of these observations the attenuation at frequencies below 10 GHz and above 22.2 GHz have been obtained. The values obtained at various frequencies show an agreement with those calculated on the basis of Oguchi's work. Comparison of the above v... View full abstract»

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  • Electromagnetic scattering by a curved plate--Solution by uniform asymptotic theory of diffraction

    Publication Year: 1984 , Page(s): 187 - 189
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (304 KB)  

    The uniform asymptotic theory (UAT) of diffraction has been applied to find the monostatic scattered field by curved plate with a plane wave illumination with electric field parallel to the edge. The solution is valid for all positions of the receiver and is uniform around the reflection boundaries. The theoretical monostatic radar cross section (RCS) shows good agreement with experimental results... View full abstract»

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  • Analysis of an antenna composed of arbitrarily located slots and wires

    Publication Year: 1984 , Page(s): 154 - 158
    Cited by:  Papers (3)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (384 KB)  

    A technique of analyzing an antenna composed of arbitrarily oriented thin wires and slots in a planar conducting screen is presented. The analysis is based on the generalized Hallen's type integral equation with closed form kernel. A parametric evaluation is done for a configuration of slot and two bending wires (Clavin element). The results obtained are shown to be in close agreement with the exp... View full abstract»

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Aims & Scope

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

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Meet Our Editors

Editor-in-Chief                                                 Kwok W. Leung