A study of the effect of the relative position of metal flanges on the radiation patterns of H-plane sectoral horn radiators†

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Abstract
Results of an exhaustive experimental and theoretical investigation of the effect of position of metal flanges on the E-plane radiation patterns of H-plane sectoral horns arc presented. It has been established that the distance of the flange from the aperture of the horn has got great significance. The experimental values of the distances of different flanges giving sharp maxima and minima of the on-axis power are found to be in perfect agreement with the theoertical values estimated with the line-source theory suggested by earlier workers. For different positions of the flanges, the radiation patterns of the horns are plotted experimentally and they are compared with the theoretical ones computed using the line-source theory. Data for a good number of horns are presented for flanges of varying parameters and for a, wide range of frequencies.

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