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Analysis of the selective behavior of multilayer structures with a dielectric grating

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2 Author(s)
Costa, J.C.W.A. ; Dept. of Microwave & Opt., State Univ. of Campinas, Brazil ; Giarola, A.J.

The potential use as dichroic surfaces in the millimeter frequency band of multilayer dielectric structures with a grating in one of the layers is examined. It is shown that the selectivity of the structure may be increased by using a convenient array of dielectric sections in the characteristic cell of the periodic layer. It is also shown how the selective behavior of the structure depends on the angle of incidence of the wave that excites the structure and on the height-periodicity ratio of the periodic layer. In addition, for an unloaded periodic layer, an approximate procedure is described to predict how many times and at which frequencies maximum reflection occurs. The effect of loading the periodic layer with increasing number of dielectric layers is examined with the conclusion that the number of frequencies where maximum reflection occurs may be increased

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Antennas and Propagation, IEEE Transactions on  (Volume:43 ,  Issue: 5 )