Sreedevi, Menon K; Mohanan, P(Cochin University of Science and Technology, October , 2006)
[+]
[-]
Abstract:
In this thesis, we explore the design, computation, and experimental analysis of
photonic crystals, with a special emphasis on structures and devices that make a
connection with practically realizable systems. First, we analyze the propenies of
photonic-crystal: periodic dielectric structures that have a band gap for
propagation. The band gap of periodically loaded air column on a dielectric
substrate is computed using Eigen solvers in a plane wave basis. Then this idea is
extended to planar filters and antennas at microwave regime. The main objectives
covered in this thesis are:• Computation of Band Gap origin in Photonic crystal with the abet of
Maxwell's equation and Bloch-Floquet's theorem
• Extension of Band Gap to Planar structures at microwave regime
• Predict the dielectric constant - synthesized dieletric cmstant of the substrates
when loaded with Photonic Band Gap (PBG) structures in a microstrip
transmission line
• Identify the resonant characteristic of the PBG cell and extract the equivalent
circuit based on PBG cell and substrate parameters for microstrip
transmission line
• Miniaturize PBG as Defected Ground Structures (DGS) and use the
property to be implemented in planar filters with microstrip transmission line
• Extended the band stop effect of PBG / DGS to coplanar waveguide and
asymmetric coplanar waveguide.
• Formulate design equations for the PBG / DGS filters
• Use these PBG / DGS ground plane as ground plane of microstrip antennas
• Analysis of filters and antennas using FDID method
Description:
Department of Electronics,
Cochin University of Science and Technology