The development of accurate and efficient electromagnetic analysis methods for large array antennas are of increasing interest and represents a challenging task. This paper addresses this issue with reference to arrays of rectangular corrugated or stepped horns/cavities, with the objective to reduce the computational resources (in terms of memory and computation time) without compromising the accuracy. Rectangular stepped horns exhibit several advantages, like good polarization purity and flexibility in integration with electronic devices, especially at millimeter waves. Its principal advantage is the capability of obtaining a high illumination efficiency of the apertures through a proper corrugation design, thus maximizing the exploitation of the total array aperture [l]. Thanks to the modular property, rectangular horns can also be arranged in highly efficient sub-array with different-size elements. The fundamental steps of the Synthetic Aperture Functions (SAF) method has been presented in [2] and will not be repeated here, except for a brief summary. The attention of this work is instead focused on the issue of SAF generation in illustrative examples of complex arrays, and on the method performance in these cases. The examples involve computation of S-parameters at input ports, as well as the equivalent magnetic current calculation at the array apertures to be used for the evaluation of the radiation pattern. These results will show the effectiveness and accuracy of this method with respect to a conventional approach.

The synthetic aperture functions method for the analysis of large arrays of stepped rectangular horn / FOCARDI P.; A. FRENI; MACI S.; VECCHI G.. - STAMPA. - 3:(2002), pp. 844-847. (Intervento presentato al convegno IEEE Antennas and Propagation Society International Symposium, 2002 tenutosi a San Antonio, Texas nel June 16–21) [10.1109/APS.2002.1018340].

The synthetic aperture functions method for the analysis of large arrays of stepped rectangular horn

FRENI, ANGELO;
2002

Abstract

The development of accurate and efficient electromagnetic analysis methods for large array antennas are of increasing interest and represents a challenging task. This paper addresses this issue with reference to arrays of rectangular corrugated or stepped horns/cavities, with the objective to reduce the computational resources (in terms of memory and computation time) without compromising the accuracy. Rectangular stepped horns exhibit several advantages, like good polarization purity and flexibility in integration with electronic devices, especially at millimeter waves. Its principal advantage is the capability of obtaining a high illumination efficiency of the apertures through a proper corrugation design, thus maximizing the exploitation of the total array aperture [l]. Thanks to the modular property, rectangular horns can also be arranged in highly efficient sub-array with different-size elements. The fundamental steps of the Synthetic Aperture Functions (SAF) method has been presented in [2] and will not be repeated here, except for a brief summary. The attention of this work is instead focused on the issue of SAF generation in illustrative examples of complex arrays, and on the method performance in these cases. The examples involve computation of S-parameters at input ports, as well as the equivalent magnetic current calculation at the array apertures to be used for the evaluation of the radiation pattern. These results will show the effectiveness and accuracy of this method with respect to a conventional approach.
2002
IEEE Antennas and Propagation Society International Symposium, 2002
IEEE Antennas and Propagation Society International Symposium, 2002
San Antonio, Texas
June 16–21
FOCARDI P.; A. FRENI; MACI S.; VECCHI G.
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/238616
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