Event Details
Design of PBG (Photonic Bandgap) Structures Using Transmission Line Theory and Their Applications
Presenter: Dr. Bomson Lee - Professor, Kyunghee University, Korea, Visiting Scholar
Supervisor:
Date: Mon, October 6, 2003
Time: 11:00:00 - 00:00:00
Place: EOW 430
ABSTRACT
Abstract
PBG (Photonic Bandgap Structures) prohibits the flow of electromagnetic power at some specific frequency band. Methodology for design of PBG structures which has been widely studied in optical regions is intensively utilized in microwave regions, with the increasing need for control of EM power flow in various applications for wireless communication systems. PBG structures can largely be divided into two classes. One is for high impedance surfaces which are applied for suppression of surface waves. The other is for suppression of specific frequency components in the transmission line such as microstrip lines or coplanar waveguide lines, using defected ground structures (DGS) in most cases. Design of PBG structures is usually performed only using EM simulators which require lots of time. With the aid of transmission line theory, the design process is much facilitated. Design of mushroom-shaped PBG having a specific bandgap center frequency and bandwidth is demonstrated using this approach. Design methods for dumbbell-shaped DGS's are also presented. A novel compact DGS which has a wide range of bandgap center frequency and bandwidth is also introduced with some design examples.
For Further Information Contact:
Dr. Lee, UVic tel. 721-8687; or e-mail bomson@khu.ac.kr