Abstract
An efficient direct numerical synthesis method for dual offset reflector antennas which is directly based on the physical optics procedure for both reflectors (PO-PO-method) and where the reflector surfaces are advantageously characterized in the spatial domain by a 2D Fourier-transformation is described. The method uses an evolution-type optimization algorithm to shape both reflectors simultaneously so as to generate the desired far field with prescribed criteria. The efficiency of the design method is demonstrated for two computer-optimized dual-offset antenna designs for space applications, a very compact optimum shaped Gregorian Earth station antenna with high offset angle (70 degrees ) and small subreflector size (13 lambda ) and a shaped Cassegrain atmospheric sensor antenna for 200 GHz. The theory is verified by available measured results.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Published Version
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