Abstract
A theoretical and experimental study of passive, microwave beam modulation is presented using a planar dielectric multilayer structure in the frequency range 26-40 GHz. The structure is shown to exhibit both spectral and angular filtering properties with respect to plane waves. The same filter is also demonstrated to function as a collimating aperture and apodizer when combined with a conventional antenna. In addition the filter is used to steer a beam through a few degrees of arc by sweeping the source frequency from approximately 27 to approximately 29 GHz.
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