Title :
Electromagnetic band-gap structures: classification, characterization, and applications
Author :
Rahmat-Samii, Y. ; Mosallaei, H.
Author_Institution :
California Univ., Los Angeles, CA, USA
Abstract :
When periodic structures interact with electromagnetic waves amazing features result. In particular, characteristics such as frequency stop-bands, pass-bands and band-gaps could be identified. Surveying the literature, one observes that various terminology have been used depending on the domain of the applications. These applications are seen in filter designs, gratings, frequency selective surfaces (FSS), photonic crystals and band-gaps (PBG), etc. We classify them under the broad terminology of “electromagnetic band-gaps (EBG)”. The focus of this paper is to present a powerful computational engine utilizing finite difference time domain (FDTD) technique integrated with the Prony method to analyze and understand the unique propagation characteristics of different classes of complex EBG structures such as, (a) FSS structures, (b) PBG crystals, (c) smart surfaces for communication antenna applications, (d) surfaces with perfectly magnetic conducting properties (PMC), (e) creation of materials with negative permittivity and negative permeability, (f) surfaces with reduced edge diffraction effects, and (g) the notion of equivalent media. The performance of two types of the EBG structures namely, single and multi-layered tripod FSS, and rectangular, triangular and woodpile PBG crystals is detailed. Some of the potential applications of these structures are highlighted
Keywords :
adaptive antenna arrays; electromagnetic wave diffraction; electromagnetic wave propagation; finite difference time-domain analysis; frequency selective surfaces; intelligent materials; periodic structures; permeability; permittivity; photonic band gap; FDTD; FSS structures; PBG crystals; Prony method; band-gaps; communication antenna applications; edge diffraction effects; electromagnetic band-gap structures; electromagnetic waves; equivalent media; finite difference time domain; frequency selective surfaces; frequency stop-bands; multi-layered tripod FSS; negative permeability materials; negative permittivity materials; pass-bands; perfectly magnetic conducting properties; periodic structures; photonic band-gaps; photonic crystals; propagation characteristics; rectangular PBG crystals; smart surfaces; triangular PBG crystals; woodpile PBG crystals;
Conference_Titel :
Antennas and Propagation, 2001. Eleventh International Conference on (IEE Conf. Publ. No. 480)
Conference_Location :
Manchester
Print_ISBN :
0-85296-733-0
DOI :
10.1049/cp:20010350