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Compact range reflector analysis using the plane wave spectrum approach with an adjustable sampling rate

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2 Author(s)
J. P. McKay ; Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA ; Y. Rahmat-Samii

An improved method for determining the test zone field of compact range reflectors is presented. The plane wave spectrum (PWS) approach is used to obtain the test zone field from knowledge of the reflector aperture field distribution. The method is particularly well suited to the analysis of reflectors with a linearly serrated rim for reduced edge diffraction. Computation of the PWS of the reflector aperture field is facilitated by a closed-form expression for the Fourier transform of a polygonal window function. Inverse transformation in the test zone region is accomplished using a fast Fourier transform (FFT) algorithm with a properly adjusted sampling rate (which is a function of both the reflector size and the distance from the reflector). The method is validated by comparison with results obtained using surface current and aperture field integration techniques. The performance of several serrated reflectors is evaluated in order to observe the effects of edge diffraction on the test zone fields

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IEEE Transactions on Antennas and Propagation  (Volume:39 ,  Issue: 6 )