Abstract
A finite-by-infinite array of thin half-wave dipoles with H-plane scan is used to show the existence of a Gibbs' phenomenon-type standing wave in scan impedance (normalized by the infinite array value) over the elements of the array. The period of this wave is 0.5/spl lambda/ at broadside for /spl lambda//2 array spacing and increases as the scan angle increases by a grating lobe-type expression. A simple empirical model based on Gibbs oscillations is fitted to the scan-impedance wave; the model predicts the 1/(1-sin/spl theta//sub 0/) period variation, and should be useful for systems trades and for preliminary design purposes.
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