Abstract
A mathematical model is developed for smooth-wall waveguide-horn radiators with an arbitrary cross section of the aperture. The exterior problem is solved in the Huygens-Kirchhoff approximation and the interior problem is solved with the use of a numerical algorithm constructed on the basis of the finite-element method. Internal (cutoff frequencies of modes, the field structure, attenuation coefficients, the wave impedance, and the maximum transmitted power of the fundamental mode) and external (radiation patterns, polarization characteristics, the aperture efficiency, and matching to free space) characteristics of dual-polarization waveguide-horn radiators with cross-shaped and four-ridge circular and square cross sections are investigated. Optimum relationships for cross-sectional dimensions that maximize the operating bandwidth, minimize the loss level, and maximize the power transmitted through the waveguides are found. It is shown that optimization of cross-sectional parameters can ensure a high degree of the axial symmetry of radiation patterns, a good matching to free space, and a low level of sidelobe radiation in the operating frequency band—characteristics which are better than those of similar radiators with square and circular cross sections. Numerical results are compared with experimental data.
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Original Russian Text © Yu.N. Vasilenko, A.S. Il’inskii, Yu.Ya. Kharlanov, 2006, published in Radiotekhnika i Elektronika, 2006, Vol. 51, No. 1, pp. 6–23.
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Vasilenko, Y.N., Il’inskii, A.S. & Kharlanov, Y.Y. Cross-shaped and four-ridge waveguide—Horn radiators: Internal and external characteristics. J. Commun. Technol. Electron. 51, 2–19 (2006). https://doi.org/10.1134/S1064226906010025
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DOI: https://doi.org/10.1134/S1064226906010025