Abstract

Electromagnetic band gap structures (the counterpart of the optical photonic band gaps, PBG) are synthesized 2-D or 3-D multi-layered periodic structures that effectively prevent the propagation of electromagnetic waves in a specified band of frequency. Generally speaking, it is desired that this property be held for any incidence angles and polarizations of electromagnetic waves in the prevention band. These band gap structures may be constructed in a variety of ways either through periodic perforations of multi-layered substrates or through the development of properly stacked 2-D or 3-D periodic metallic or dielectric structures. Because of the wide-bandwidth of the propagation prevention band gap, these structures may be used in various microwave/millimeter wave devices and antennas. Potential applications may be found in antenna gain enhancement, miniaturization of antenna dimensions, ground planes, cavities, waveguide structures, etc.

© 1999 Optical Society of America