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Fast radiation pattern evaluation for lens and reflector antennas

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2 Author(s)
Boag, A. ; Dept. of Electr. Eng.-Phys. Electron., Tel Aviv Univ., Israel ; Letrou, C.

A novel algorithm referred to as the fast physical optics (FPO) for computing the radiation patterns of nonplanar aperture antennas over a range of observation angles is presented. The computation is performed in the framework of the conventional physical optics approximation appropriate for the high frequency regime. The proposed algorithm is directly applicable to reflector and lens antennas as well as to radomes. The method comprises two steps. First, a decomposition of the aperture into subdomains and computation of the pertinent radiation pattern of each subdomain. Second, interpolation, phase-correction and aggregation of the radiation patterns into the final pattern of the whole aperture. A multilevel algorithm is formulated via a recursive application of the domain decomposition and aggregation steps. The computational structure of the multilevel algorithm resembles that of the FFT while avoiding its limitations.

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:51 ,  Issue: 5 )

Date of Publication:

May 2003

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