IEEE MTT/AP Queensland Chapter seminar: A/Prof Karu Eselle, 04.00PM, Fri 12 Dec 2003

Antennas based on Electromagnetic Band Gap Structures

Speaker: A/Prof Karu Eselle, Electronics Department, ICS Division, Macquarie University, Sydney

When: 04.00PM, Friday 12 Dec 2003

Venue: 78-420

Host: Serguei Zagriatski

Abstract:

  Photonic crystals, also known as Electromagnetic Band-Gap
  Structures, have created new possibilities for controlling and
  manipulating the flow of electromagnetic fields. Based on the
  pioneering work of Eli Yablonovitch and Sajeev John, photonic
  crystals are formed by creating a dielectric structure that is
  periodic in one or more orthogonal directions. Photonic crystals may
  be engineered to give a range of frequencies where propagating modes
  will be either partially or fully suppressed, known as the photonic
  band gap (PBG). Defects in photonic crystals can localise the
  electromagnetic fields and may be used to create waveguides with
  right angle bends, beam splitters, high quality lasers, couplers,
  waveguide crossings, channel add-drop filters, (de)-multiplexers,
  and antennas. These devices are extremely useful for processing
  electromagnetic signals in communication systems. In materials that
  exhibit a complete PBG, there will also be complete inhibition of
  spontaneous emission of light from atoms and molecules. Many of the
  electronic properties of semiconductors, such as band gaps and
  localized defect modes, also apply to photons in photonic
  crystals. We will present some background on the field of photonic
  crystals, highlight recent developments, and describe some of our
  experimental and theoretical research work on antennas based on 1D,
  2D and 3D EBG structures.

Biography:

 
  Associate Professor Karu Esselle gained a PhD Ottawa, MASc Ottawa,
  BScEng Moratuwa, SMIEE, MIEAust. He is currently Director and Chair
  of Postgraduate Research, Division of ICS and Director of the Centre
  for Electromagnetic and Antenna Engineering.

  In 1992, he joined the Macquarie University Electronics Department
  where he is an Associate Professor at present. He is also the
  Director of Postgraduate Research in the Division of Information and
  Communication Sciences, which consist of four Departments. He
  pursues research in the areas of Antenna Design and Development,
  Electromagnetic Band Gap (EBG) Structures/ photonic Crystals,
  Theoretical Methods in Electromagnetics and Microwave Engineering.

  Associate Professor Esselle has published over 80 papers including
  invited chapters in two books. His research programs have been
  funded by the Australian Research Council and other funding
  bodies. He has a number of industry clients and collaborates with
  several prestigious research groups in Australia and overseas. He
  serves as a Research Grant Assessor to several organizations
  including the Australian Research Council and Hong-Kong University
  Grants Commission. He is also a regular referee for international
  journals.

  He is the Chair of Educational Activities of the IEEE NSW Section
  and the main faculty coordinator of the IEEE Branch being formed at
  Macquarie University. He was the Director of Research of the
  Electronics department from 1998 to 2002, and the Chair of the IEEE
  New South Wales Microwave Theory and Techniques/Antennas and
  Propagation Joint Chapter from 1999 to 2002. He was the Publicity
  Chair of the 2000 Asia-Pacific Microwave Conference (APMC). He has
  also served on Technical Program Committees or International
  Advisory Committees for conferences such as the APMC, AMEREM,
  EUROEM, IASTED APR etc. He is a Senior Member of IEEE, and an URSI
  Radioscientist.

Contact:

Serguei Zagriatski, seminar host (zagr@itee.uq.edu.au)
or Guido Governatori (ITEE seminar co-ordinator) (guido@itee.uq.edu.au)

ITEE seminar web page: http://www.itee.uq.edu.au/~seminar

[All seminars]