DIFFRACTION EFFECTS IN CYLINDRICAL MONOPOLE AND DIELECTRIC DISK ANTENNAS

I. V. Ivanchenko; N. A. Popenko; M. M. Khruslov

doi:10.1615/RadioPhysicsRadioAstronomy.v3.i3.100

Radio Physics and Radio Astronomy

Editor-in-Chief: Leonid M. Lytvynenko (open in a new tab)

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Published 4 issues per year

ISSN Print: 2152-274X

ISSN Online: 2152-2758

DIFFRACTION EFFECTS IN CYLINDRICAL MONOPOLE AND DIELECTRIC DISK ANTENNAS

Volume 3, Issue 3, 2012, pp. 265-271

DOI: 10.1615/RadioPhysicsRadioAstronomy.v3.i3.100

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I. V. Ivanchenko
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkov 61085, Ukraine

N. A. Popenko
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkov 61085

M. M. Khruslov
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12 Academician Proskura St., Kharkiv 61085, Ukraine; V. Karazin National University of Kharkiv, 4 Svobody Sq., Kharkiv 61022, Ukraine

ABSTRACT

Based on experimental studies and simulation modelling, the influence of diffraction effects on the radiation characteristics of cylindrical monopole antennas and dielectric disk antennas is determined under conditions when the electrodynamic parameters of antenna components are changed. In particular it is established that the oscillating dependence of the angle of maximum radiation and the resonant frequency of cylindrical monopole antennas with the monopole height d_r1 = λ/4 as function of the ground plane radius are explained by the different spatial structure of electromagnetic field in the inductive region of the antenna with the ground plane radius multiple of λ/2 and of odd number of times λ/4 (λ is the wavelength in free space). It is shown that the spatial distributions of electromagnetic fields as the "spatial wave grating" are formed in the inductive region of antennas under test.

KEY WORDS: cylindrical monopole antenna, dielectric disk antenna, diffraction, interference

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