Event Details
Modeling of Compact Antennas for Wireless Communication in Complex Environment
Presenter: MD. Mizanur Rahman - Ph.D. Candidate
Supervisor:
Date: Tue, May 8, 2001
Time: 15:00:00 - 16:00:00
Place: EOW 430
ABSTRACT
Abstract:
Demand for low profile and compact antennas for wireless communication has greatly increased due to miniaturization of electronic devices. High performance for these antennas is also desired. The conflicting nature of the requirements of high performance and compact size makes the design of these antennas challenging. We investigated several compact and low profile antennas for wireless communications and explored the possible application of recently developed PBG (Photonic Band Gap) structures in these antenna systems to improve their performance.
In this talk, dual band antennas for handheld telephones are presented and their performance in presence of the user's head is described. Two wide band circularly polarized patch antennas is also presented for possible application in satellite communications or on portable computers. It discusses some of the performances of these antenna systems that can be improved by suppressing the propagation of surface waves. The possible use of 2D planar PBG structures, that prevents the surface wave propagation within certain frequency band (stop band), is also discussed. An analytical model for two existing PBG structures is presented that can predict the band gaps of the structures. A new PBG structure with lower operating frequency and multiple stop bands is also presented. Finally, application of PBG structure in circularly polarized patch antenna is discussed and the performance of the antenna is presented.