device with permittivity modulated to the propagation of electromagnetic waves.

摘要

The propagation of electromagnetic waves in materials with electromagnetic properties, which varies along their propagation direction, presents interesting characteristics, such as the presence of frequency bands in which the propagation is allowed and of bands in which the electromagnetic waves are stopped. The present invention relates to a microstrip structure (20) comprising a conductive layer (22) whose width varies in such a way as to obtain an effective electric constant, which presents a sinusoidal shape modulation.