A dielectric photonic parabolic reflector

This paper presents a study of a photonic parabolic reflector: The structur e is exclusively composed of dielectric materials which are associated to b uild a photonic bandgap (PBG) structure with a forbidden frequency band loc ated at the working frequency of the reflector. The dish was designed with FDTD computations rising a surface-impedance formalism. The directivity of an experimental device has been measured and compared to the directivity ca lculated with the FDTD simulations. (C) 1999 John Wiley & Sons, Inc.